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Soft magnetic co-based metallic glass alloy

外国特許コード F110005292
整理番号 E05108US
掲載日 2011年8月29日
出願国 アメリカ合衆国
出願番号 51064203
公報番号 20050178476
公報番号 7223310
出願日 平成15年4月7日(2003.4.7)
公報発行日 平成17年8月18日(2005.8.18)
公報発行日 平成19年5月29日(2007.5.29)
国際出願番号 JP2003004417
国際公開番号 WO2003085151
国際出願日 平成15年4月7日(2003.4.7)
国際公開日 平成15年10月16日(2003.10.16)
優先権データ
  • 特願2002-108352 (2002.4.10) JP
  • 2003WO-JP04417 (2003.4.7) WO
発明の名称 (英語) Soft magnetic co-based metallic glass alloy
発明の概要(英語) (US7223310)
Disclosed is a soft magnetic Co-based metallic glass alloy with high glass forming ability, which has a supercooled-liquid temperature interval (DeltaTchi) of 40 K or more, a reduced glass-transition temperature (Tg/Tm) of 0.59 and a low coercive force of 2.0 A/m or less.
The metallic glass alloy is represented by the following composition formula: [Co1-n-(a+b)FenBaSib]100-chiMchi, wherein each of a, b and n represents an atomic ratio satisfying the following relations: 0.1<=a<=0.17; 0.06<=b<=0.15; 0.18<=a+b<=0.3; and 0<=n<=0.08, M representing one or more elements selected from the group consisting of Zr, Nb, Ta, Hf, Mo, Ti, V, Cr, Pd and W, and chi satisfying the following relation: 3 atomic %<=chi<=10 atomic %.
The present invention overcomes restrictions in preparing a metallic glass bar with a thickness of 1 mm or more from conventional Co-Fe-B-Si-based metallic glasses due to their poor glass forming ability, and provides an excellent Co-Fe-B-Si-based metallic glass allowing the formation of bulk metallic glass, which serves as a key technology for achieving a broader application fields of metallic glass products.
特許請求の範囲(英語) [claim1]
1. A soft magnetic Co-based metallic glass alloy product with high glass forming ability, comprising metallic glass alloy being represented by the following composition formula:
[Co1-n-(a+b)Fen Ba Sib]100-chi Mchi ,
wherein each of a, b and n represents an atomic ratio satisfying the following relations: 0.1 <= a <= 0.17;
[claim2]
0.06 <= b <= 0.15;
[claim3]
0.18 <= a+b <= 0.3;
and 0 <= n <= 0.08, M represents one or more elements selected from the group consisting of Zr, Nb, Ta, Hf, Mo, Ti, V, Cr, Pd and W, andchi satisfies the following relation: 3 atomic % <= chi <= 10 atomic %,wherein said glass alloy product has minimum thickness or diameter of 0.5 mm or more, andsaid metallic glass alloy has a supercooled-liquid temperature interval (DELTA Tchi ) of 40 K or more, a reduced glass-transition temperature (Tg/Tm) of 0.59 or more and a coercive force of 2.0 A/m or less, said metallic glass alloy being cooled and solidified from its liquid phase in a supercooled liquid state.
[claim4]
2. The soft magnetic Co-based metallic glass alloy product as defined in claim 1, which contains 3 atomic % or less of one or more elements selected from the group consisting of P, C, Ga and Ge.
  • 発明者/出願人(英語)
  • INOUE AKIHISA
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
米国特許分類/主・副
  • 148/304
  • 148/403
参考情報 (研究プロジェクト等) ERATO INOUE Superliquid Class AREA
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