Method for producing metal fibers

B - Operations – Transporting – 21 – C

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B21C 37/00 (2006.01) C22F 1/18 (2006.01)

Patent

CA 2529085

A method of producing metal fibers including melting a mixture of at least a fiber metal and a matrix metal, cooling the mixture to form a bulk matrix comprising at Ieast a fiber phase and a matrix phase and removing at Ieast a substantial portion of the matrix phase from the fiber phase. Additionally, the method may inciude deforming the bulk matrix. In certain embodiments, the fiber metal may be at Ieast one of niobium, a niobium alloy, tantalurn and a tantalum alloy and the matrix metal may be at Ieast one of copper and a copper alloy. The substantial portion of the matrix phase may be removed, in certain erbodiments, by dissolving of the matrix phase in a suitabie minerai acid, such as, but not Iimited to, nitric acid, sulfuric acid, hydrochioric acid and phosphoric acid.

L'invention concerne un procédé de production de fibres métalliques consistant à faire fondre un mélange d'au moins une fibre métallique et une matrice métallique, à refroidir le mélange pour former une matrice en vrac qui comprend au moins une phase de fibre et une phase de matrice et à éliminer au moins une partie substantielle de la phase matrice dans la phase fibre. On peut aussi déformer la matrice en vrac. Sous certaines variantes, la fibre métallique peut être au moins un élément du groupe niobium, alliage en niobium, tantale et alliage en tantale, et la matrice métallique peut être au moins un élément du groupe cuivre et alliage en cuivre. La partie substantielle de la phase matrice peut être éliminée, sous certaines variantes, par dissolution de la phase matrice dans un acide minéral approprié, du type, mais pas seulement acide nitrique, acide sulfurique, acide chlorhydrique et acide phosphorique.

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