Abrégé

The invention relates to a deformable rigid structure, preferably for using in the simulation of situations such as uneven, collapsed or deformed structures, with the possibility of reviewing and modifying said situations as desired, where the structure comprises a plurality of nodes, connection ends and coupling systems, the node having at least two flat faces to which the coupling system is connected, the coupling system, in turn, being connected to a connection end comprising a structural element that has ends on which a spherical element is arranged so that the structural element is connected to the node in a pivoting manner.

Classes IPC  ?

• E04B 1/19 - Structures à ossature tridimensionnelle
• E04B 1/32 - ArcsVoûtesStructures gauches
• E04B 1/343 - Structures caractérisées par des parties mobiles, séparables ou repliables, p. ex. pour le transport
• E04B 1/344 - Structures caractérisées par des parties mobiles, séparables ou repliables, p. ex. pour le transport avec des parties à charnières

Abrégé

The invention relates to a method of obtaining silicon carbide from rice hulls, which comprises the following steps: (a) adding a catalyst and a precipitating agent to the hulls and drying the latter until the degree of moisture is between 0 % and 5 %; (b) pyrolysing the hulls to which the catalyst and precipitating agent have been added, in an inert atmosphere until ashes are obtained; (c) reducing the size of the ashes; and (d) mechanically separating the silicon carbide from the ashes. The invention also relates to two apparatus: a tilting furnace for performing method step (b), and a cyclone for performing method step (d).

Classes IPC  ?

• C01B 31/36 - Carbures de silicium ou de bore
• F27B 7/12 - Fours à tambours rotatifs, c.-à-d. horizontaux ou légèrement inclinés inclinables
• B04C 5/00 - Appareils dans lesquels la direction axiale du tourbillon est inversée

Abrégé

The invention relates to a method for producing metal matrix composite materials comprising ceramic particles. The method comprises the following steps: obtaining semi-solid melt of the metal material having between 0.3 and 0.6 solid fractions in relation to the volume of the melt, first obtaining the melt in a liquid state, then in a semi-solid state; mixing the melt; adding metal-coated ceramic particles; casting the melt; and forging the cast material. The composite material obtained using said method has a metal matrix with a globular structure. It is also possible to produce metal materials with a globular structure using all of the steps of the method except the particle addition step. In addition, the invention relates to a machine for carrying out the steps of the method according to the invention.

Classes IPC  ?

• B22D 27/04 - Action sur la température du métal, p. ex. par chauffage ou refroidissement du moule
• B22D 27/08 - Secouage, vibration, ou retournement des moules
• B22D 27/09 - Traitement du métal dans le moule pendant qu'il est liquide ou plastique en appliquant une pression
• B22D 17/00 - Coulée sous pression ou moulage par injection, c.-à-d. moulage en introduisant le métal dans le moule sous haute pression
• B22D 21/00 - Coulée de métaux non ferreux ou de composés métalliques, dans la mesure où leurs propriétés métallurgiques affectent le procédé de couléeUtilisation de compositions appropriées
• B22D 23/02 - Coulée directe