Fe-B-P-Cu nanocrystalline soft magnetic alloys with high Bs

被引：61

作者：

Urata, Akiri ^{[1
]}

Matsumoto, Hiroyuki ^{[1
]}

Yoshida, Shigeyoshi ^{[1
]}

Makino, Akihiro ^{[2
]}

机构：

[1] NEC TOKIN Corp, Taihaku Ku, Sendai, Miyagi 9828510, Japan

[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷

关键词：

Nanocrystalline alloy; High saturation magnetic flux density; Soft magnetic material; ULTRAFINE GRAIN-STRUCTURE; AMORPHOUS PHASE;

D O I：

10.1016/j.jallcom.2010.12.104

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effects of the addition of Cu on the crystallization processes, nanostructures and soft magnetic properties for the Fe80.8-84.8B8-10P6-8Cu1.2 alloys were investigated. The Fe-B-P-Cu alloys show two separated distinct exothermic peaks upon heating due to the addition of Cu. Furthermore, the interval temperature between each one for the Fe82.8B9P7Cu1.2 alloy is 103 K, and the first and second exothermic peaks result from the phase transition from amorphous to alpha-Fe and then to Fe-3(B,P), respectively. A uniform nanocrystalline structure composed of alpha-Fe grains with a 17 nmdiameter was realized by annealing just above the first exothermic peak, and this nanocrystalline alloy exhibits high B-s of 1.70 T and low H-c of 4.9 A/m. Therefore, the nanocrystalline Fe-B-P-Cu soft magnetic alloy with high Bs and low Hc has a large industrial advantage due to miniaturization, high efficiency and low material cost of electric devices. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：S431 / S433

页数：3

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