C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 1/05 (2006.01) B22F 1/00 (2006.01) C03B 5/167 (2006.01) C22C 1/10 (2006.01) C22C 5/04 (2006.01) C22C 32/00 (2006.01) C22F 1/14 (2006.01)
Patent
CA 2382761
The present invention is aimed at providing a platinum material in which creep strength is elevated by improving a metal grain shape in an oxide-dispersion strengthened platinum material in which zirconium oxide is dispersed, and providing a process for producing the platinum material. The present invention provides an oxide-dispersion strengthened platinum material in which zirconium oxide is dispersed in platinum and which can be obtained through rolling and thermal recrystallization, in which platinum grains constituting the platinum material have an average grain size in a rolling direction in the range of 200 to 1500 µm and an average grain aspect ratio of 20 or more.
L'invention concerne un matériau de platine renforcé par une dispersion d'oxyde, comprenant un oxyde de zirconium dispersé dans le platine, et possédant des propriétés de résistance au fluage accrues par amélioration de la structure tissulaire du métal. L'invention concerne notamment un matériau de platine, du type ci-dessus décrit, produit par laminage, recristallisation et chauffage, et dans lequel on utilise, en tant que grains de cristal de platine constituant le matériau de platine, des grains de cristal de platine possédant une dimension moyenne de grain dans le sens du laminage, de l'ordre de 200 à 1500 mu m, et un rapport L/D moyen des grains de cristal de l'ordre de 20 ou plus.
Hitomi Soichi
Shoji Toru
Takagi Yoshikazu
Watanabe Yoshinobu
Marks & Clerk
Tanaka Kikinzoku Kogyo K.k.
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