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Soft magnetic metallic glass alloy

外国特許コード F110005293
整理番号 E05109US
掲載日 2011年8月29日
出願国 アメリカ合衆国
出願番号 50616803
公報番号 20050161122
公報番号 7357844
出願日 平成15年2月27日(2003.2.27)
公報発行日 平成17年7月28日(2005.7.28)
公報発行日 平成20年4月15日(2008.4.15)
国際出願番号 JP2003002257
国際公開番号 WO2003074749
国際出願日 平成15年2月27日(2003.2.27)
国際公開日 平成15年9月12日(2003.9.12)
優先権データ
  • 特願2002-055291 (2002.3.1) JP
  • 2003WO-JP02257 (2003.2.27) WO
発明の名称 (英語) Soft magnetic metallic glass alloy
発明の概要(英語) (US7357844)
Disclosed is a soft magnetic Fe-B-Si-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 0.56 or more and a saturation magnetization of 1.4 T or more.
The metallic glass alloy is represented by the following composition formula: (Fe1-a-bBaSib)100-chiMchi, wherein a and b represent an atomic ratio, and satisfy the following relations: 0.1<=a<=0.17, 0.06<=b<=0.15 and 0.18<=a+b<=0.3, M is one or more elements selected from the group consisting of Zr, Nb, Ta, Hf, Mo, Ti, V, Cr, Pd and W, and chi satisfies the following relation: 1 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 Fe-B-Si-based metallic glasses due to their poor glass forming ability, and provides a high saturation-magnetization 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 Fe -- B -- Si-based metallic glass alloy product comprising metallic glass alloy being represented by the following composition formula:
(Fe1-a-bBaSib)100-chi Mchi ,wherein a and b represent an atomic ratio, and satisfy the following relations: 0.125 <= a <= 0.17, 0.10 <= b <= 0.15 and 0.225 <= a+b <= 0.3 M is 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: 1 atomic % <= chi <= 10 atomic %.wherein said metallic glass alloy has a supercooled-liquid temperature interval (DELTA Tchi ) of 40 K or more, a reduced glass-transition temperature (Tg/Tm) of 0.56 or more,said glass alloy product as cast has minimum thickness or diameter of 0.5 mm or more, and a volume fraction (Vf-amo) of a glass phase is 100%, anda saturation magnetization of more than 1.4 T and coercive force of 3.7A/m or less.
[claim2]
2. The soft magnetic Fe -- B -- Si-based metallic glass alloy 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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