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Spherical particles of Fe base metallic glass alloy, Fe base sintered alloy soft magnetic material in bulk form produced by sintering the same, and method for their production UPDATE

外国特許コード F110003604
整理番号 E05111US
掲載日 2011年6月30日
出願国 アメリカ合衆国
出願番号 54052703
公報番号 20060254386
公報番号 7622011
出願日 平成15年12月24日(2003.12.24)
公報発行日 平成18年11月16日(2006.11.16)
公報発行日 平成21年11月24日(2009.11.24)
国際出願番号 JP2003016542
国際公開番号 WO2004059020
国際出願日 平成15年12月24日(2003.12.24)
国際公開日 平成16年7月15日(2004.7.15)
優先権データ
  • 特願2002-374553 (2002.12.25) JP
  • 2003WO-JP16542 (2003.12.24) WO
発明の名称 (英語) Spherical particles of Fe base metallic glass alloy, Fe base sintered alloy soft magnetic material in bulk form produced by sintering the same, and method for their production UPDATE
発明の概要(英語) (US7622011)
Disclosed is a Fe-Ga-P-C-B-Si based metallic glass alloy particle prepared by a gas atomizing process, which has an approximately complete spherical shape, a relatively large particle size and a high crystallization temperature (Tx).
The plurality of particles may be subjected to a spark plasma sintering process at the crystallization temperature or less under a compression pressure of 200 MPa or more, to provide a bulk Fe-based sintered metal soft magnetic material of metallic glass, which has a high density, a single phase structure of metallic glass in an as-sintered state, excellent soft magnetic characteristics applicable to a core of a magnetic head, a transformer or a motor, and a high specific resistance.
特許請求の範囲(英語) [claim1]
1. A sintered soft magnetic element, comprising: Fe-based sintered alloy soft magnetic material of metallic glass, the sintered soft magnetic element being prepared by sintering, in a temperature range of 573 K to the crystallization temperature (Tx), spherical particles of Fe-based metallic glass alloy prepared by an atomizing process, the spherical particles having a particle size of 30 to 125 mu m; a composition consisting of, by atomic %, 0.5 to 10% of Ga, 7 to 15% of P, 3 to 7% of C, 3 to 7% of B and 1 to 7% of Si, with the remainder being Fe, the Fe-based metallic glass alloy having a crystallization temperature (Tx) of 770 to 800 K and a liquidus temperature (Tl) of 1220 to 1300 K, wherein the Fe-based sintered alloy soft magnetic material has metallic glass phase of high-density with a relative density of 99.0% or more, a magnetic permeability of 3900 (mu max) or more, a coercive force (Hc) of 19 (A/m) or less and a specific resistance of 1.6 mu OMEGA m or more in an as-sintered state,
wherein the Fe-based sintered alloy soft magnetic material has a temperature interval of a supercooled liquid region (DELTA Tx) of 25 K or more, as expressed by a formula: DELTA Tx=Tx-Tg, wherein Tx is a crystallization temperature, and Tg is a glass transition temperature; and a reduced glass transition temperature of 0.59 or more, as expressed by a formula: Tg/Tl, wherein Tg is a glass transition temperature, and Tl is a liquidus temperature.
[claim2]
2. A sintered soft magnetic element as defined in claim 1 sintering is performed in a temperature range of 573 to 723 K, wherein the Fe-based sintered alloy soft magnetic material has a magnetic permeability of 7000 (mu max) or more and a coercive force (Hc) of 12 (A/m) or less.
[claim3]
3. A sintered soft magnetic element, comprising: sintered metallic glass particles of a composition consisting of, by atomic %, 0.5 to 10% of Ga, 7 to 15% of P, 3 to 7% of C, 3 to 7% of B and 1 to 7% of Si, with the remainder being Fe, said metallic glass particles having maximum particle size of 30 to 125 mu m, wherein the Fe-based alloy soft magnetic material has metallic glass phase of high-density with a relative density of 99.0% or more, a magnetic permeability of 3900 (mu max) or more, a coercive force (Hc) of 19 (A/m) or less and a specific resistance of 1.6 mu OMEGA m or more in an as-sintered state,
wherein the Fe-based alloy soft magnetic material has a temperature interval of a supercooled liquid region (DELTA Tx) of 25 K or more, as expressed by a formula: DELTA Tx=Tx-Tg, wherein Tx is a crystallization temperature, and Tg is a glass transition temperature; and a reduced glass transition temperature of 0.59 or more, as expressed by a formula: Tg/Tl, wherein Tg is a glass transition temperature, and Tl is a liquidus temperature.
[claim4]
4. A sintered soft magnetic element as defined in claim 1, wherein the Fe-based sintered alloy soft magnetic material has a magnetic permeability of 7000 (mu max) or more and a coercive force (Hc) of 12 (A/m) or less.
  • 発明者/出願人(英語)
  • INOUE AKIHISA
  • SHEN BAOLONG
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
参考情報 (研究プロジェクト等) ERATO INOUE Superliquid Class AREA
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