Method of containing a phase change material in a porous...

C - Chemistry – Metallurgy – 04 – B

Patent

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C04B 41/90 (2006.01) C04B 35/84 (2006.01) C09K 5/06 (2006.01) C23C 16/00 (2006.01) C23C 18/54 (2006.01) C25D 3/02 (2006.01) F16D 65/10 (2006.01) F16D 65/12 (2006.01) F16D 69/02 (2006.01) F16D 65/78 (2006.01)

Patent

CA 2382070

A process for fabricating a carbon composite structure that is lightweight, structurally sound, and characterized by high heat capacity. A carbon structure is devised with cavities therein receiving a phase change medium. The phase change medium demonstrates both high energy absorption capacity and high thermal conductivity and is formed from a carbon fiber to establish a high porosity medium having a large volume fraction. The surface energy of the carbon fibers is enhanced in various ways as by deposition of a carbide former, a metallurgical coating or a precursor liquid or by electroplating or etching the surfaces of the carbon fibers. The enhanced surface energy allows for the retention of phase change material.

L'invention porte sur un procédé de fabrication d'une structure composite en carbone, légère, bien charpentée et caractérisée par une capacité thermique élevée. Cette structure en carbone est divisée en cavités accueillant un milieu à changement de phase. Ce milieu à changement de phase présente une haute capacitlé d'absorption d'énergie et une haute conductivité thermique, et est formé à partir d'une fibre de carbone de façon à obtenir un milieu à forte porosité ayant une fraction de grand volume. La tension superficielle des fibres de carbone est améliorée de différentes manières, comme par le dépôt d'une forme en carbure, un revêtement métallique ou un liquide précurseur ou par électrodéposition ou gravure des surfaces des fibres de carbone. La tension superficielle améliorée des fibres permet la rétention du matériau à phase aqueuse.

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