B - Operations – Transporting – 22 – F
Patent
B - Operations, Transporting
22
F
B22F 9/02 (2006.01) B22F 9/22 (2006.01) C01B 6/02 (2006.01) C01B 6/24 (2006.01) C01G 23/04 (2006.01) C01G 25/02 (2006.01) C22B 7/00 (2006.01) C22B 34/12 (2006.01) C22B 34/14 (2006.01) C22C 1/04 (2006.01) C22C 14/00 (2006.01) C22C 16/00 (2006.01)
Patent
CA 2716263
A method for manufacturing alloy powders based on titanium, zirconium and hafnium, alloyed with the elements Ni, Cu, Ta, W, Re, Os, and Ir is described in which an oxide of Ti and/or Zr and/or Hf is mixed with a metal powder of the ele-ments named and with a reducing agent, and wherein this mixture is heated in a furnace, optionally under argonate atmosphere or, optionally under hydrogen atmosphere (forming metal hydrides in the process), until the reducing reaction begins, the reaction product is leached and then washed and dried, wherein the oxide used has an average grain size of 0.5 to 20 µm, a specific surface area according to BET of 0.5 20 m2/g and a minimum content of 94 wt.-%. An easy to produce powder, in particular in relation to the ignition point and burning time, is produced.
L'invention concerne un procédé de préparation de poudre d'alliage à base de titane, de zirconium et d'hafnium, alliée aux éléments Ni, Cu, Ta, W, Re Os et Ir, consistant à mélanger un oxyde de Ti et/ou de Zr et/ou de Hf avec une poudre métallique desdits éléments et un agent de réduction, et à chauffer ce mélange dans un four éventuellement sous atmosphère hydrogène (ce qui entraîne la formation d'hydrures métalliques), jusqu'à l'amorçage de la réaction de réduction, et à lessiver, puis à laver et à sécher le produit de réaction, l'oxyde utilisé présentant une granularité moyenne comprise entre 0,5 et 20 µm, et une surface spécifique BET comprise de 0,5 à 20 m2/g et une pureté minimale de 94 % en poids.
Karaca Ahmet
Sermond Bernd
Wilfing Gerhard
Chemetall Gmbh
Robic
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