TOP > 外国特許検索 > Method of making a Cu-base bulk amorphous alloy

Method of making a Cu-base bulk amorphous alloy

外国特許コード F110003603
整理番号 E05106US1
掲載日 2011年6月30日
出願国 アメリカ合衆国
出願番号 29272308
公報番号 20090078342
公報番号 8470103
出願日 平成20年11月25日(2008.11.25)
公報発行日 平成21年3月26日(2009.3.26)
公報発行日 平成25年6月25日(2013.6.25)
優先権データ
  • 特願2000-397007 (2000.12.27) JP
  • 特願2001-262438 (2001.8.30) JP
  • 10/451,143 (2003.12.1) US
発明の名称 (英語) Method of making a Cu-base bulk amorphous alloy
発明の概要(英語) The present invention provides Cu-base amorphous alloys containing an amorphous phase of 90% or more by volume fraction.
The amorphous phase has a composition represented by the formula: Cu100-a-b(Zr+Hf)aTib or Cu100-a-b-c-d(Zr+Hf')aTibMcTd, wherein M is one or more elements selected from Fe, Cr, Mn, Ni, Co, Nb, Mo, W, Sn, Al, Ta and rare earth elements, T is one or more elements selected from the group consisting of Ag, Pd, Pt and Au, and a, b, c and d are atomic percentages falling within the following ranges: 5@a@55, 0@b@45, 30@a+b@60, 0.5@c@5, 0@d@10.
The Cu-base amorphous alloy has a high glass-forming ability as well as excellent mechanical properties and formability, and can be formed as a rod or plate material with a diameter or thickness of 1 mm or more and an amorphous phase of 90% or more by volume fraction, through a metal mold casting process.
従来技術、競合技術の概要(英語) BACKGROUND ART
It is well known that an alloy in its molten state can be rapidly cooled or quenched to obtain an amorphous solid in various forms, such as thin strip, filament or powder/particle.
An amorphous alloy thin-strip or powder can be prepared through various processes, such as a single-roll process, a twin-roll process, an in-rotating liquid spinning process and an atomization process, which can provide a high quenching rate.
Heretofore, a number of Fe, Ti, Co, Zr, Ni, Pd or Cu-base amorphous alloys have been developed, and their specific properties such as excellent mechanical properties and high corrosion resistance have been clarified.
In regard to Cu-base amorphous alloys related to the present invention, researches have been mainly made on binary alloys such as Cu -- Ti and Cu -- Zr, or ternary alloys such as Cu -- Ni -- Zr, Cu -- Ag -- RE, Cu -- Ni -- P, Cu -- Ag -- P, Cu -- Mg -- RE and Cu -- (Zr, RE, Ti) -- (Al, Mg, Ni) (Japanese Patent Laid-Open Publication Nos.
H07-41918, H07-173556, H09-59750 and H11-61289; Mater., Trans. JIM, Vol. 37, No. 7 (1996) 1343-1349; Sic.
Rep. RITU. A28 (1980) 255-265; Mater.
Sic. Eng. A181-182 (1994) 1383-1392; Mater.
Trans. JIM, Vol. 38, No. 4 (1997) 359-362).
While the above Cu-base amorphous alloys have been researched based largely on thin-strip samples prepared through the aforementioned single-roll/liquid quenching process, research and development on Cu-base bulk amorphous alloys for practical use, or Cu-base bulk amorphous alloys excellent in glass-forming ability, has made few advance.

特許請求の範囲(英語) [claim1]
1. A method of making a Cu-base bulk amorphous alloy product comprising: preparing an alloy melt consisting essentially of a composition represented by the following formula: Cu100-a-b(Zr+Hf)aTib, wherein a and b are atomic percentages falling within the following ranges: 30<a <= 35, 10 <= b <= 15, 40 <= a+b <= 45,
casting said alloy melt into a copper mold at an injection pressure of 0.5 to 1.5 kg.f/cm2 and solidifying in the mold, thereby obtaining a rod or plate product having a diameter or thickness of 1 mm to 4 mm,
wherein said rod or plate product has an amorphous phase of 90% or more by volume fraction, and wherein said rod or plate product has a compressive fracture strength of 1800 MPa or more, an elongation of 1.5% or more, and a Young's modulus of 100 GPa or more,
wherein a supercooled liquid region of said amorphous phase has a temperature interval DELTA Tx of 25 K or more, said temperature interval being presented by the following formula: DELTA Tx=Tx-Tg, Tx being a crystallization temperature of said alloy, and Tg being a glass transition temperature of said alloy, wherein said alloy melt has a reduced glass transition temperature of 0.56 or more, said reduced-glass transition temperature being represented by the following formula: Tg/Tm, wherein Tg is a glass transition temperature of said alloy, and Tm is a melting temperature of said alloy.
[claim2]
2. The method of making a Cu-base amorphous alloy product as defined in claim 1, wherein said a and b are atomic percentage falling within the following ranges: 30<a <= 35, b=10, 40 <= a+b <= 45.
[claim3]
3. The method of making a Cu-base amorphous alloy product as defined in claim 1, wherein said a and b are atomic percentage falling within the following values: a=30, b=10, a+b=40.
[claim4]
4. The method of making a Cu-base amorphous alloy product as defined in claim 1, wherein said a and b are atomic percentage falling within the following values: a=35, b=10, a+b=45.
  • 発明者/出願人(英語)
  • INOUE AKIHISA
  • ZHANG WEI
  • ZHANG TAO
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
米国特許分類/主・副
  • 148/561
  • 148/304
参考情報 (研究プロジェクト等) ERATO INOUE Superliquid Class AREA
ライセンスをご希望の方、特許の内容に興味を持たれた方は、問合せボタンを押してください。

PAGE TOP

close
close
close
close
close
close