The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 2010
Filed:
Apr. 30, 2008
Kiyohito Ishida, Sendai, JP;
Ryosuke Kainuma, Natori, JP;
Katsunari Oikawa, Sendai, JP;
Ikuo Ohnuma, Shibata-gun, JP;
Toshihiro Ohmori, Sendai, JP;
Jun Sato, Sendai, JP;
Kiyohito Ishida, Sendai, JP;
Ryosuke Kainuma, Natori, JP;
Katsunari Oikawa, Sendai, JP;
Ikuo Ohnuma, Shibata-gun, JP;
Toshihiro Ohmori, Sendai, JP;
Jun Sato, Sendai, JP;
Japan Science and Technology Agency, Saitama, JP;
Abstract
An iridium-based alloy which has L1-type intermetallic compounds dispersedly precipitated therein and has a basic composition including, in terms of mass proportion, 0.1 to 9.0% Al, 1.0 to 45% W, and Ir as the remainder. The component system containing 0.1 to 1.5% Al has L1-type intermetallic compounds dispersedly precipitated therein. The component system containing 1.5 to 9.0%, excluding 1.5%, Al has L1-type and B2-type intermetallic compounds dispersedly precipitated therein. Part of the Ir may be replaced with an element (X) (Co, Ni, Fe, Cr, Rh, Re, Pd, Pt, or Ru) and part of the Al and W may be replaced with an element (Z) (Ni, Ti, Nb, Zr, V, Ta, Hf, or Mo). The iridium-based alloy, which contains L1-type intermetallic compounds [1r(Al,W) and [(Ir, X)(Al, W, Z)] dispersedly precipitated therein, has a high melting point. The lattice constant mismatch between the L1-type intermetallic compounds, i.e., [Ir(Al, W)] and [(Ir, X)(Al, W, Z)], and the matrix is small and, hence, the iridium-based alloy is excellent in high-temperature strength and structural stability.