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Iridium-based alloy with high heat resistance and high strength and process for producing the same

外国特許コード F110005231
整理番号 A281-10WO
掲載日 2011年8月26日
出願国 アメリカ合衆国
出願番号 11230608
公報番号 20080206090
公報番号 07666352
出願日 平成20年4月30日(2008.4.30)
公報発行日 平成20年8月28日(2008.8.28)
公報発行日 平成22年2月23日(2010.2.23)
国際出願番号 PCT/JP2007/052069
国際出願日 平成19年1月31日(2007.1.31)
発明の名称 (英語) Iridium-based alloy with high heat resistance and high strength and process for producing the same
発明の概要(英語) An iridium-based alloy which has L12-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 L12-type intermetallic compounds dispersedly precipitated therein. The component system containing 1.5 to 9.0%, excluding 1.5%, Al has L12-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 L12-type intermetallic compounds [1r3(Al,W) and [(Ir, X)3(Al, W, Z)] dispersedly precipitated therein, has a high melting point. The lattice constant mismatch between the L12-type intermetallic compounds, i.e., [Ir3 (Al, W)] and [(Ir, X)3(Al, W, Z)], and the matrix is small and, hence, the iridium-based alloy is excellent in high-temperature strength and structural stability.
  • 発明者/出願人(英語)
  • Ishida, Kiyohito; Sendai [JP]
  • Kainuma, Ryosuke; Natori [JP]
  • Oikawa, Katsunari; Sendai [JP]
  • Ohnuma, Ikuo; Shibata-gun [JP]
  • Ohmori, Toshihiro; Sendai [JP]
  • Sato, Jun; Sendai [JP]
  • Japan Science and Technology Agency, Saitama [JP]
国際特許分類(IPC)
米国特許分類/主・副
  • 420/461
  • 148/430
参考情報 (研究プロジェクト等) CREST The Innovation of Simulation Technology and the Construction of Foundations for Its Practical Use AREA
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