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Cu-Be base amorphous alloy

外国特許コード F110005291
整理番号 E05107US
掲載日 2011年8月29日
出願国 アメリカ合衆国
出願番号 34400401
公報番号 20040099348
公報番号 7056394
出願日 平成13年12月10日(2001.12.10)
公報発行日 平成16年5月27日(2004.5.27)
公報発行日 平成18年6月6日(2006.6.6)
国際出願番号 JP2001010808
国際公開番号 WO2002086178
国際出願日 平成13年12月10日(2001.12.10)
国際公開日 平成14年10月31日(2002.10.31)
優先権データ
  • 特願2001-121266 (2001.4.19) JP
  • 特願2001-264370 (2001.8.31) JP
  • 2001WO-JP10808 (2001.12.10) WO
発明の名称 (英語) Cu-Be base amorphous alloy
発明の概要(英語) (US7056394)
The present invention provides a Cu-Be based amorphous alloy comprising an amorphous phase of 50% or more by volume fraction.
This alloy has a composition represented by the following formula: Cu100-a-bBea(Zr1-x-yHfxTiy)b.
In the formula, "a" and "b" represent atomic percentages which are 0<a<=20 and 20<=b<=40, and "x" and "y" represent atomic fractions which are 0<=x<=1 and 0<=y<=0.8.
The alloy may contain a small amount of one or more elements selected from the group consisting of Fe, Cr, Mn, Ni, Co, Nb, Mo, W, Sn, Al, Ta and rare-earth elements and/or the group consisting of Ag, Pd, Pt and Au.
The alloy has a wide supercooled-liquid temperature range and a large reduced glass transition temperature (Tg/Tm) to achieve a high thermal stability against crystallization or a high glass-forming ability.
特許請求の範囲(英語) [claim1]
1. A Cu -- Be based amorphous alloy product consisting of an alloy comprising an amorphous phase of 90% or more by volume fraction, said alloy consisting of a composition represented by the following formula: Cu100-a-bBea(Zr1-x-yHfxTiy)b, wherein a and b represent atomic percentages which are 3 <= a <= 5, 20 <= b <= 40, and x and y represent atomic fractions which are 0 <= x+y <= 1 and 0 <= y <= 0.25,wherein said amorphous alloy having a supercooled liquid temperature range DELTA Tx of 25 K or more, said supercooled liquid temperature range DELTA Tx being represented by the formula: DELTA Tx=Tx-Tg, wherein Tx represents a crystallization initiation temperature of said alloy, and Tg represents a glass transition temperature of said alloy,wherein said amorphous alloy having a reduced glass transition temperature of 0.58 or higher, said reduced glass transition temperature being represented by the following formula:Tg/Tm, wherein Tg represents a glass transition temperature of said alloy, and Tm represents a melting temperature of said alloy, andwherein said amorphous alloy product having a shape with a diameter or thickness of 1 mm or more, made through a copper-mold casting method, and exhibits a compressive fracture strength sigma f of 2200 MPa.
[claim2]
2. A Cu -- Be based amorphous alloy product consisting of an alloy comprising an amorphous phase of 90% or more by volume fraction, said alloy consisting of a composition represented by the following formula: Cu100-a-b-c-dBea(Zr1-x-yHfxTiy)bMcTd, wherein M represents one or more elements selected from the group consisting of Fe, Cr, Mn, Co, Nb, Mo, W, Sn, Al, Ta and rare-earth elements, T represents one or more elements selected from the group consisting of Ag, Pd, Pt and Au, and a, b, c and d represent atomic percentages which are 3 <= a <= 5, 20 <= b <= 40, 0<c <= 5 and 0 <= d <= 10, and x and y represent atomic fractions which are 0 <= x+y <= 1 and 0 <= y <= 0.25,wherein said amorphous alloy having a supercooled liquid temperature range DELTA Tx of 25 K or more, said supercooled liquid temperature range DELTA Tx being represented by the formula: DELTA Tx=Tx-Tg, wherein Tx represents a crystallization initiation temperature of said alloy, and Tg represents a glass transition temperature of said alloy,wherein said amorphous alloy having a reduced glass transition temperature of 0.58 or higher, said reduced glass transition temperature being represented by the following formula:Tg/Tm, wherein Tg represents a glass transition temperature of said alloy, and Tm represents a melting temperature of said alloy, andwherein said amorphous alloy product having a shape with a diameter or thickness of 1 mm or more, made through a copper-mold casting method, and exhibits a compressive fracture strength sigma f of 2200 MPa.
  • 発明者/出願人(英語)
  • INOUE AKIHISA
  • ZHANG TAO
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
米国特許分類/主・副
  • 148/403
  • 148/304
参考情報 (研究プロジェクト等) ERATO INOUE Superliquid Class AREA
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