The present invention relates to diamond grit and a manufacturing method therefor and provides a tetrakaidecahedron diamond grit with a uniform size and shape. The manufacturing method for the diamond grit according to the present invention enables shape control and minimizes impurities and crystal defects, thereby achieving a diamond grit for ultra-precision grinding for a chemical mechanical planarization (CMP) process.
C01B 32/28 - After-treatment, e.g. purification, irradiation, separation or recovery
B24B 53/017 - Devices or means for dressing, cleaning or otherwise conditioning lapping tools
B24D 18/00 - Manufacture of grinding tools, e.g. wheels, not otherwise provided for
B24D 3/10 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic for porous or cellular structure, e.g. for use with diamonds as abrasives
2.
BONDING TOOL HAVING HIGH FLATNESS AND PROVIDED WITH POLYCRYSTALLINE DIAMOND TIP INTEGRATED WITH CEMENTED CARBIDE BODY
A bonding tool used for mounting a semiconductor device is disclosed. The present invention provides a bonding tool which is coupled to a holder of a bonding device so as to heat-compress a semiconductor device and a wire device, wherein the bonding tool comprises: a single cemented carbide body including a holder coupling part provided at one side thereof to be coupled to the holder of the bonding device and a heater insertion hole provided therein; and a polycrystalline diamond tip coupled to the other side of the cemented carbide body. According to the present invention, an integrated bonding tool, which minimizes a difference in a thermal expansion coefficient in a manufacturing process or a use environment, can be provided.
B22F 7/02 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite layers
The present disclosure relates to polycrystalline cubic boron nitride (PCBN) with enhanced impact-resistance and wear-resistance and a method for producing the PCBN. According to the present disclosure, producing the polycrystalline cubic boron nitride with one or more kinds of protrusion-shaped borides formed on the cubic boron nitride surface may inhibits the development of cracks along the surfaces of the cubic boron nitride particles and binders, thereby to improve the impact-resistance and wear-resistance. In this way, the life-span of the machining tools may be enhanced. Further, the polycrystalline cubic boron nitride may have at least one kind of a compound composed of at least two selected from the group consisting of BN, Ti, W, Co, Zr, and Si as formed during sintering. This may allow the PCBN to have high bonding strength between the cubic boron nitride and the binder.
C04B 35/5831 - Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on borides, nitrides or silicides based on boron nitride based on cubic boron nitride
The present invention relates to a polycrystalline cubic boron nitride and a method for preparing the same and, more specifically, to a polycrystalline cubic boron nitride with excellent impact resistance and abrasion resistance and a method for preparing the same. According to the present invention, a polycrystalline cubic boron nitride in which at least one type of a protrusion-shaped boride is formed on a surface of the cubic boron nitride is prepared, so that the development of cracks along surfaces of cubic boron nitride particles and a binder is suppressed to improve impact resistance and abrasion resistance, thereby manufacturing a tool with excellent lifespan. In addition, according to the present invention, a polycrystalline cubic boron nitride in which at least one of the compounds composed of two or more of BN, Ti, W, Co, Zr, and Si is contained in a binder is prepared, so that a polycrystalline cubic boron nitride having excellent binding strength between a cubic boron nitride and a binder can be produced.
The present invention relates to a polycrystalline cubic boron nitride and, more specifically, to a polycrystalline cubic boron nitride with improved fracture resistance and abrasion resistance. According to the present invention, the polycrystalline cubic boron nitride is prepared by using CBN particles with different particle sizes, thereby simultaneously satisfying the improvement in dispersibility of a first group of CBN particles and a second group of CBN particles and the enhancement in binding strength between a binder and the cubic boron nitride while increasing binding strength between the second group CBN particles and the binder through thermal treatment, thus effectively improving abrasion resistance and fracture resistance. In addition, according to the present invention, the polycrystalline cubic boron nitride is prepared by limiting the volume ratio between the fed CBN particles, so that a tool having excellent lifespan can be manufactured through the improvement in fracture resistance and abrasion resistance.
A single crystal cubic boron nitride according to an embodiment of the present invention is prepared through synthesis with a catalyst including hexagonal boron nitride (HBN) and a metal element, and the present invention relates to a single crystal cubic boron nitride having an MA value of 1 ppm or less and preferably, a value of 0, and to a method of preparing same.
C01B 21/064 - Binary compounds of nitrogen with metals, with silicon, or with boron with boron
C04B 35/5831 - Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on borides, nitrides or silicides based on boron nitride based on cubic boron nitride
B24D 3/04 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
7.
METHOD FOR PREPARING GRAPHENE BY USING EUTECTIC GRAPHITE
The present invention relates to a method for preparing graphene by using eutectic graphite. According to the present invention, the method for preparing graphene by using eutectic graphite comprises: a first step of preparing a sintered body, comprising diamond and unreacted graphite, by sintering a mixture powder comprising a metal and graphite; a second step of converting, by dipping the sintered body in a strong acid containing potassium permanganate (KMnO4) and carrying out electrolysis on the same into a mixture comprising diamond and graphite; a third step of stripping graphite within the mixture; a fourth step of recovering stripped graphene oxide; and a fifth step of reducing the recovered graphene oxide. According to the present invention, a process can be reduced by simultaneously carrying out a graphite pre-treatment step of in a process for preparing graphene and a process for preparing diamond, and thus there are effects of reducing reagents costs, which are required for pre-treatment, and processing costs.
B01J 19/10 - Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing sonic or ultrasonic vibrations
B01J 3/06 - Processes using ultra-high pressure, e.g. for the formation of diamonds; Apparatus therefor, e.g. moulds or dies
The present invention relates to a method for preparing graphene by using eutectic graphite. According to the present invention, the method for preparing graphene by using eutectic graphite comprises: a first step of preparing a sintered body comprising diamond and unreacted graphite, by sintering a mixture powder comprising a metal and graphite; a second step of converting, by dipping the sintered body in a strong acid aqueous solution and carrying out electrolysis on the same into a mixture comprising diamond and graphite; a third step of injecting a potassium permanganate (KMnO4) aqueous solution into the mixture, and stirring the same; a fourth step of stripping graphite within the mixture; a fifth step of recovering stripped graphene oxide; and a sixth step of reducing the stripped graphene oxide. According to the present invention, since eutectic graphite, which is a by-product to be disposed of after the process for preparing diamond, is recycled so as to be used as a raw material for graphene, graphene preparation costs can be reduced, and there is also an effect of enabling additional costs for disposing eutectic graphite to be reduced.
B01J 19/10 - Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing sonic or ultrasonic vibrations
B01J 3/06 - Processes using ultra-high pressure, e.g. for the formation of diamonds; Apparatus therefor, e.g. moulds or dies
The present invention relates to a polycrystalline diamond compact having multiple polycrystalline diamond sintered bodies and a method for producing the polycrystalline diamond compact. The method for producing the polycrystalline diamond includes: preparing first diamond powder; producing a first polycrystalline diamond sintered body having a diameter smaller than the diameter of a cemented substrate by sintering the first diamond powder under 5 to 6 GPa pressure and 1300 to 1500° C. temperature; positioning the first polycrystalline diamond sintered body in the center of the cemented substrate, and granulating second diamond powder around the first polycrystalline diamond sintered body; and sintering the second diamond powder under 5 to 6 GPa pressure and 1300 to 1500° C. temperature to form a second polycrystalline diamond sintered body. The polycrystalline diamond sintered body has uniform sintered characteristics at the center and outer edges thereof.
C04B 35/528 - Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components
E21B 10/567 - Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
E21B 10/55 - Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements
10.
SINGLE-CRYSTALLINE CUBIC BORON NITRIDE AND METHOD FOR PREPARING SAME
Single-crystalline cubic boron nitride according to an embodiment of the present invention is prepared by a synthesis with a catalyst, including hexagonal boron nitride (HBN) and metal elements, wherein, on the basis of the first toughness index thereof when it is heated at 15-25°C for 10-20 minutes in the argon (Ar) atmosphere, the second toughness index thereof when it is heated at 800-1200°C for 10-20 minutes in the argon (Ar) atmosphere is reduced by a range of 0 to 13.9%.
The present invention relates to a polycrystalline cubic boron nitride (CBN), and a preparation method therefor comprising: a pretreatment step of pretreating hexagonal boron nitride (HBN) so as to prepare a raw material; a molding step of injecting the raw material into a mold so as to pressurize the same; and a synthesis step of injecting the raw material into a reactor so as to heat the same at high pressure.
A cutting tool insert is disclosed. The disclosed cutting tool insert comprises: a supporting substrate extending in a first direction; and a cutting layer coupled to one surface of the supporting substrate and supported by the supporting substrate, wherein the one surface of the supporting substrate has an uplift part, which is uplifted in the first direction. The present invention can reduce a residual stress generated in a polycrystalline diamond compact.
The present invention relates to a polycrystalline diamond compact. Particularly, the polycrystalline diamond compact, according to the present invention, comprises: a cemented carbide layer; a polycrystalline diamond sintered part formed at only a region including at least one portion among edge parts of the cemented carbide layer; and a chip breaker formed in a groove shape at the inner side thereof with respect to the upper surface of the cemented carbide layer and the polycrystalline diamond sintered part, so as to cut up chips, generated during machining, into small chips or wind the chips into a spring form. According to the present invention, the flowability of the chips, that is, cut pieces generated during a cutting process, is improved, thereby increasing the efficiency of the cutting process. A polycrystalline diamond sintered body is provided at only the edge part directly related to the cutting process, and a part at which the chip breaker is formed is formed by using cemented carbide metal or other materials such that machinability and manufacturability are improved.
The present invention relates to a polycrystalline diamond compact, and a method for manufacturing a polycrystalline diamond compact, according to the present invention, comprises: a first assembling step of assembling a first diamond powder on a carbide substrate; a first sintering step of preliminarily sintering the assembled carbide substrate and the first diamond powder on the carbide substrate to form a first polycrystalline diamond layer on the carbide substrate; a second assembling step of assembling a second diamond powder having a particle diameter in the range of 0.1μm to 5μm on the first polycrystalline diamond layer; and a second sintering step of sintering the assembled carbide substrate, the first polycrystalline diamond layer, and the second diamond powder on the first polycrystalline diamond layer to form a second polycrystalline diamond layer on the first polycrystalline diamond layer. According to the present invention, the content of a metal binder (catalyst) in a portion which is used in bedrock cutting during actual drilling, that is, a superficial portion of the polycrystalline diamond layer, is controlled to be minimized, thereby increasing heat resistance and improving wear resistance and impact resistance.
C04B 35/52 - Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on carbon, e.g. graphite
The present invention relates to a polycrystalline diamond compact provided with the multiple polycrystalline diamond sintered bodies and a method for producing the polycrystalline diamond compact, the method for producing a polycrystalline diamond compact provided with multiple polycrystalline diamond sintered bodies according to the present invention comprising: a first step for preparing first diamond powder; a second step for producing a first polycrystalline diamond sintered body having a diameter smaller than the diameter of a cemented substrate by sintering the first diamond powder under 5-6 GPa pressure and 1300-1500? temperature; a third step for positioning the first polycrystalline diamond sintered body in the center of the cemented substrate, and granulating second diamond powder around the first polycrystalline diamond sintered body; and a fourth step for sintering the second diamond powder under 5-6 GPa pressure and 1300-1500? temperature to form a second polycrystalline diamond sintered body. According to the present invention, by sintering the interior and exterior of the polycrystalline diamond sintered body separately, the polycrystalline diamond sintered body can be produced with uniform sintered characteristics at the center and outer edges thereof.
C04B 35/52 - Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on carbon, e.g. graphite
The present invention relates to a polycrystalline diamond compact with improved thermal stability. A method for manufacturing a polycrystalline diamond compact, according to the present invention, comprises: a step of preparing primary sintering by mixing and assembling first diamond particles and metal binder particles; a primary sintering step of sintering the mixed and assembled particles; a step of leaching the upper surface of the sintered polycrystalline diamond compact; a step of preparing secondary sintering by mixing second diamond particles and the metal binder particles and assembling the mixed particles on the upper surface of the primarily sintered polycrystalline diamond compact; a secondary sintering step of sintering the sintered polycrystalline diamond compact and the mixed particles of the upper part; and a grinding step of grinding the reassembled second diamond particles and metal binder particles so as to remove the same. A metal binder improves the sinterability of the diamond particles and increases the impact resistance of a sintered body. However, when the metal binder is applied at a cutting edge portion of the diamond compact, heat resistance is reduced, thereby causing bad effects such as cracks or breakage, whereas the polycrystalline diamond compact, according to the present invention, minimizes the content of the residual metal binder in a surface layer part and increases the content of the diamond particles with high thermal conductivity, thereby increasing the lifespan of the polycrystalline diamond compact.
C04B 35/52 - Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on carbon, e.g. graphite
The present invention relates to a drill bit for drilling provided with a polycrystalline diamond compact, and specifically to a drill bit for drilling provided with a polycrystalline diamond compact according to the present invention comprising: a plurality of polycrystalline diamond compacts forming a fixed extension part accommodating part as a set space along the direction of a central shaft; a bit body having a seating part on which at least a part of the polycrystalline diamond compacts are seated, a hole-shaped clamp accommodating part adjacent to the seating part, and a fixed member accommodating part extending from the seating part in a stepped fashion to the clamp accommodating part so as to be in open communication therewith; a fixed member comprising a fixed extension part accommodated in the fixed extension part accommodating part when the polycrystalline diamond compacts are seated in the seating part, and a pressing extension part extending at a right angle from the fixed extension part, and accommodated in the fixed extension part accommodating part, and having at least a part of the end part exposed in the interior of the clamp accommodating part; and a clamp inserted into the clamp accommodating part by a method akin to driving a screw, and having a pressing groove on the outer circumferential surface for accommodating at least a part of the end part of the pressing extension part. According to the present invention, by having a lever-lock type of a structure for fixing the polycrystalline diamond compacts, the present invention has the benefit of facilitating attaching and detaching the polycrystalline diamond compacts.
E21B 10/46 - Drill bits characterised by wear resisting parts, e.g. diamond inserts
E21B 10/573 - Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts - characterised by support details, e.g. the substrate construction or the interface between the substrate and the cutting element
E21B 10/43 - Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
18.
METHOD FOR PREPARING ULTRAFINE DIAMOND SINTERED BODY
The present invention relates to a method for preparing an ultrafine diamond sintered body. Specifically, the method for preparing an ultrafine diamond sintered boy according to the present invention comprises: an aqueous solution preparing step of preparing an aqueous solution in which at least a part of a metal binder is ionized; a slurry preparing step of preparing slurry by putting a diamond powder in the aqueous solution; a mixing step of irradiating ultrasonic waves on the slurry such that particles of the metal binder are homogeneously dispersed on surfaces of particles of the diamond powder; a reducing and heat-treating step of performing heat treatment on the mixed slurry in a high-pressure environment; and a sintering step of sintering the heat-treated slurry. According to the present invention, the sintering of the diamond sintered body is sufficiently achieved with even a small amount of metal binder through the homogenous dispersion of the metal binder, thereby making it possible to minimize the content of unnecessary metal binder.
C04B 35/52 - Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on carbon, e.g. graphite
The present invention relates to a sintered polycrystalline diamond with an improved impact resistance and thermal stability and a method for fabricating the same, and specifically, a method for fabricating a sintered polycrystalline diamond according to the present invention includes the steps of: spraying a cemented substrate containing a metal binder component with tungsten particles so as to form a tungsten coating layer; and sintering diamond powder on the tungsten coating layer so as to carburize the tungsten coating layer with the carbon gushing out from the diamond powder, wherein the carburized tungsten coating layer coheres to the metal binder component permeating the diamond powder layer. According to the present invention, the surface of the cemented disk to be joined with the diamond compact layer is sprayed with the tungsten particles at a high speed before sintering without an additional intermediate base material, thus controlling the content of the metal binder such as cobalt permeating from the cemented disk, and securing the stability of joining the diamond layer and the cemented layer in the interface.
The present invention relates to a cutting tool having a cutting surface distinction mark in a diamond compact, and more specifically, a polycrystalline diamond compact according to the present invention comprises: a tungsten carbide layer provided with a distinction mark on the outer circumferential surface thereof; a polycrystalline diamond layer formed on top of the tungsten carbide layer; and a toughness portion, which is provided inside the polycrystalline diamond layer and which has a higher toughness than the polycrystalline diamond layer, wherein the distinction mark indicates whether the polycrystalline diamond layer corresponding to the marked position is a surface which can be cut. According to the present invention, a cutting area can be easily identified and installed on the cutting tool even when distinguishing between the toughness portion and other portions is difficult from outward appearance, by using the polycrystalline diamond compact comprising the toughness portion during cutting work.
C04B 35/52 - Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on carbon, e.g. graphite
B22F 3/00 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
B23B 27/14 - Cutting tools of which the bits or tips are of special material
21.
POLYCRYSTALLINE DIAMOND SINTERED COMPACT AND METHOD FOR MANUFACTURING SAME
The present invention relates to a polycrystalline diamond sintered compact and a method for manufacturing same, and more specifically, a polycrystalline diamond sintered compact according to the present invention comprises: a tungsten carbide layer; a polycrystalline diamond layer formed on top of the tungsten carbide layer; and a toughness portion, which is provided inside the polycrystalline diamond layer and which has a higher toughness than the polycrystalline diamond layer. By comprising the toughness portion in the polycrystalline diamond layer, the present invention has the advantages of preventing a crack created on the polycrystalline diamond layer during cutting work from spreading to other areas, and of achieving the crack spreading-prevention structure through a variety of manufacturing methods.
The present invention relates to a multi-crystal diamond sintered body using titanium coated diamond powder and to a method for manufacturing same. Specifically, the multi-crystal diamond sintered body according to the present invention includes: a carbide layer; and a multi-crystal diamond layer provided on the carbide layer and formed by sintering diamond powder coated with a conductive metal. According to the present invention, processability is improved while maintaining the quality of an existing product, and thus production efficiency of the product itself can be increased and the yield and the reliability of the product can be improved.
The present invention relates to a multi-layer tool containing PCD and PCBN and to a method for manufacturing same. More particularly, the multi-layer tool containing PCD and PCBN according to the present invention comprises: a PcBN layer; and a PCD layer in which an interface is formed between the PCD layer and the PcBN layer. A dispersing agent that lowers the sintering temperature and the sintering pressure of the PCD layer is dispersed from the interface between the PCD layer and the PcBN layer so as to form a concentration gradient. With the multi-layer tool material according to the present invention, bonding between multi-materials is possible even without a substrate and instead of the conventional use of using two tool materials, one tool material is needed to enable cutting while satisfying product standards such as those for wear resistance. Also, the process of bonding products of various materials can be facilitated and processing time can be saved.
C22C 29/16 - Alloys based on carbides, oxides, borides, nitrides or silicides, e.g. cermets, or other metal compounds, e. g. oxynitrides, sulfides based on nitrides
The present invention relates to a complex roll comprising: a roll shaft having threaded surfaces formed at both sides of an outer surface thereof and spaced apart from each other, and a collar portion formed between the threaded surfaces; a plurality of rolling rings assembled to both sides about the collar portion; spacer rings assembled to the respective sides of each of the rolling rings, opposed to the sides of each of the rolling rings directed toward the collar portion; clamping nuts, each of which being arranged at the side of the spacer ring opposed to the side of the spacer ring directed toward the rolling ring, and each of which having a threaded surface to be fastened to the threaded surface of the roll shaft; and side keys interposed between each rolling ring and the collar portion and between each rolling ring and each spacer ring.
A wire tool includes a wire including a metal, a plating layer disposed on a surface of the wire, a plurality of diamond particles disposed over the plating layer, and a protection layer each covering the diamond particles and including phosphorus (P).
B23D 61/18 - Sawing tools of special type, e.g. wire saw strands, saw blades or saw wire equipped with diamonds or other abrasive particles in selected individual positions
B28D 5/04 - Fine working of gems, jewels, crystals, e.g. of semiconductor material; Apparatus therefor by tools other than of rotary type, e.g. reciprocating tools
Provided is a wire tool, including: a metal-containing wire; a coated layer disposed on a surface of the wire; a plurality of diamond particles disposed at an upper portion of the coated layer; and a protective layer disposed between the diamond particles and the coated layer, and containing titanium (Ti) and at least two elements selected from the group consisting of aluminum (Al), silicon (Si), chromium (Cr), and vanadium (V).
B28D 5/04 - Fine working of gems, jewels, crystals, e.g. of semiconductor material; Apparatus therefor by tools other than of rotary type, e.g. reciprocating tools
B23D 61/18 - Sawing tools of special type, e.g. wire saw strands, saw blades or saw wire equipped with diamonds or other abrasive particles in selected individual positions
C25D 3/12 - Electroplating; Baths therefor from solutions of nickel or cobalt
H01L 21/304 - Mechanical treatment, e.g. grinding, polishing, cutting
The present invention relates to a wire tool comprising: a wire containing metal; a plating layer formed on the surface of the wire; a plurality of diamond particles arranged on the plating layer; and a first protection layer which covers the diamond particles, and a second protection layer formed between the first protection layer and the plating layer.
B28D 5/04 - Fine working of gems, jewels, crystals, e.g. of semiconductor material; Apparatus therefor by tools other than of rotary type, e.g. reciprocating tools
B23D 61/18 - Sawing tools of special type, e.g. wire saw strands, saw blades or saw wire equipped with diamonds or other abrasive particles in selected individual positions
C25D 3/12 - Electroplating; Baths therefor from solutions of nickel or cobalt
H01L 21/304 - Mechanical treatment, e.g. grinding, polishing, cutting
The present invention relates to a wire saw, comprising: a core wire; an electrodeposited nickel layer which is electrodeposited on an outer surface of the core wire; a diamond arranged such that a portion thereof is outwardly exposed from the electrodeposited nickel layer; a protective plating layer which covers the electrodeposited nickel layer and the diamond. The present invention also relates to a method for manufacturing a wire saw. The protective plating layer, which covers the electrodeposited nickel layer and the diamond, prevents the diamond from escaping from the electrodeposited nickel layer.
B23D 61/18 - Sawing tools of special type, e.g. wire saw strands, saw blades or saw wire equipped with diamonds or other abrasive particles in selected individual positions
B28D 1/08 - Working stone or stone-like materials, e.g. brick, concrete, not provided for elsewhere; Machines, devices, tools therefor by sawing with saw blades of endless cutter-type, e.g. chain saws, strap saws
C25D 5/12 - Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
C25D 5/14 - Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium two or more layers being of nickel or chromium, e.g. duplex or triplex layers
The present invention relates to a diamond wire saw for cutting a silicon ingot for a solar cell, and more particularly, to a diamond wire saw in which the correlation among a wire, an electrodeposited nickel layer, and diamond particles is optimized.
B23D 61/18 - Sawing tools of special type, e.g. wire saw strands, saw blades or saw wire equipped with diamonds or other abrasive particles in selected individual positions
B28D 1/08 - Working stone or stone-like materials, e.g. brick, concrete, not provided for elsewhere; Machines, devices, tools therefor by sawing with saw blades of endless cutter-type, e.g. chain saws, strap saws
C25D 5/12 - Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
The present invention relates to a diamond wire saw which cuts a silicon ingot for solar light, and more particularly to a diamond wire saw which has an optimized volume ratio of a chip pocket, prevents diamond particles from falling and smoothly discharges chips generated in a cutting process.
B23D 61/18 - Sawing tools of special type, e.g. wire saw strands, saw blades or saw wire equipped with diamonds or other abrasive particles in selected individual positions
B28D 1/08 - Working stone or stone-like materials, e.g. brick, concrete, not provided for elsewhere; Machines, devices, tools therefor by sawing with saw blades of endless cutter-type, e.g. chain saws, strap saws
B23Q 11/00 - Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
The present invention relates to a wire saw, and particularly, to a wire saw that includes a partial coating layer formed on only a portion of ultrafine particle surfaces, in order to prevent the ultrafine particles from being over-deposited on a core line and also to enable the partial coating layer to be easily formed on the ultrafine particles.
B23D 61/18 - Sawing tools of special type, e.g. wire saw strands, saw blades or saw wire equipped with diamonds or other abrasive particles in selected individual positions
B28D 1/08 - Working stone or stone-like materials, e.g. brick, concrete, not provided for elsewhere; Machines, devices, tools therefor by sawing with saw blades of endless cutter-type, e.g. chain saws, strap saws
C04B 35/515 - Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides
32.
HIGH-HARDNESS COATING POWDER, AND PREPARATION METHOD THEREOF
The present invention provides a method for preparing of high-hardness coating powder to easily coat the surface of a base with a coating material, said method comprising the steps of (a) dissolving a first chlorine (Cl)-based salt and a second fluorine (F)-based salt into a solvent to obtain a solution, (b) mixing a base, and a coating material containing titanium, with the solution, and drying the mixture, (c) putting the mixture obtained in said step (b) into a reaction furnace, and (d) heating the reaction furnace at a predetermined temperature, and keeping the reaction furnace at said predetermined temperature to cause a molten salt reaction wherein said first salt and said second salt are molten. The present invention also provides a high-hardness coating powder prepared by said method.
C09D 127/00 - Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
C09D 5/46 - Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrostatic or whirl-sintering coating
Provided is an excavating tool insert having improved durability and bondability. The excavating tool insert includes a supporting member containing first and second components; and an ultrahard layer bonded to the supporting member. The first and second components have a density gradient in a thickness direction of the supporting member, the first component contains cobalt (Co) and the second component contains tungsten (W), and a content of the first component is increased in a direction away from the ultrahard layer and a content of the second component is increased in a direction toward the ultrahard layer.
Provided is an excavating tool insert including: a support member having a first hardness and a first surface; and a super hard layer that is coupled to the first surface of the support member and has a second hardness that is greater than the first hardness, wherein the first surface of the support member comprises an identification mark that is embossed or engraved, and the super hard layer is formed to adhere to the first surface of the support member. Accordingly, the excavating tool insert can be easily identified even when the surface of the excavating tool insert is worn away due to cutting or excavating operations.
Provided is a sintered body for an excavation tool. The sintered body for an excavation tool includes a substrate having a pillar-form body, a plurality of supporting units extended from the body in a length direction of the body and arranged to be spaced apart from each other in a circumference direction of the body, and an accommodation region formed in the body and the supporting units; and a superhard layer combined with the substrate, the superhard layer being formed by charging superhard materials, in a powder form and having the hardness that is higher than that of the substrate, in the accommodation region, and by sintering the charged superhard materials under high temperature and high pressure. The superhard layer has a plurality of cutting edges and thus a cutting performance of the sintered body for an excavation tool significantly improves.
The present invention relates to a field emission flat lamp. In accordance with the present invention, a field emission flat lamp including a diffusion plate which diffuses light emitted from the panel by using the field emission has a technical characteristic in comprising an external spacer, which is located at a dark region generated between the diffusion plate and the panel and refracts light emitted from the panel. Therefore, a field emission flat lamp in accordance with the present invention is capable of obtaining a constant brightness and uniformity of light by composing an external spacer of diffusion type in a transparent semispherical or a cylindrical shape to lessen a dark region generated by an internal spacer. And a field emission flat lamp in accordance with the present invention is capable of reducing thickness and number of diffusion plates provided for diffusing the light emitted from the panel. And also, a field emission flat lamp in accordance with the present invention is capable of reducing distance between a diffusion plate for lessening the dark region generated by a conventional internal spacer and a panel where light is emitted.
The present invention relates to a field emission device; and, more particularly, a field emission device capable of preventing leakage current between electrodes while improving unstable light emitting characteristics. A field emission device of the present invention, including: a front substrate and a rear substrate disposed by being separated at a predetermined distance from each other; an anode formed on the front substrate; a fluorescence material formed on the anode; a plurality of electrode members placed on the rear substrate by being separated at a predetermined distance from each other; and an emitter formed on at least one among the electrode members, wherein the electrode members are composed of at least four electrode members, each electrode formed alternately, and the emitters of each electrode member are separated from each other. By forming an emitter having more than four individual electrode members, the electric field emission device in accordance with the present invention has advantages as follows: At first, it can prevent a leakage current between electrodes, even if a gap between the electrodes is smaller than that of the conventional dual emitter triode structure and a lateral gate method; and Secondly, it can obtain more natural images than applied to an LCD (Liquid Crystal Display) backlight, even if individual electrodes are formed at the same distance as that of the conventional method.
patents
