Superconductor materials fabrication method using...

C - Chemistry – Metallurgy – 22 – B

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C22B 34/24 (2006.01) B22F 9/20 (2006.01) C04B 35/495 (2006.01) C04B 35/653 (2006.01) C22B 5/00 (2006.01) C25C 3/26 (2006.01) H01L 39/24 (2006.01)

Patent

CA 2463396

A preform (28) is slip-cast or pressed from a metal compound or a mixture of metal compounds, sintered in air, vacum, or inert gas, and is electrolytically reduced in a bath (20) of molten salt to form a porous metal or alloy product. The alloy is in the form of a solid, porous sponge. In the bath (20) the salt is in contact with a reservoir (26) of molten infiltration material (24). After completion of the electrolytic reduction the porous product is moved into the infiltration material which fills the pores therein, displacing the salt. The infiltrated product is then solidified for further materials processing. The sponge material preferably comprises niobium, and the infiltration liquid is for instance molten tin. The infiltrated niobium sponge can be further processed to form a superconductor material of A-15 type, e.g. Nb3Al and Nb3Sn.

L'invention concerne une préforme (28) coulée en barbotine ou comprimée à partir d'un composé métallique ou d'un mélange de composés métalliques, frittée à l'air libre, sous vide ou dans un gaz inerte, et qui est réduite par voie électrolytique dans un bain (20) de sel fondu afin de former un métal poreux ou un produit à alliage. Cet alliage se présente sous forme d'éponge poreuse solide. Dans le bain (20), le sel est en contact avec un réservoir (26) de matériau d'infiltration fondu (24). Une fois la réduction électrolytique terminée, le produit poreux est déplacé dans le matériau d'infiltration qui en remplit les pores, ce qui déplace le sel. Le produit infiltré est ensuite solidifié en vue d'autres traitements des matériaux.

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