New Fe-B-P-Cu nanocrystalline soft magnetic alloys with high Js combined with low coercivity Hc

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

Fe-Si-B amorphous alloys with less than 80 at% Fe are now in practical use due to their excellent magnetic softness (low coercivity Hc) combined with rather high saturation magnetic polarization (Js) which basically owing to the lack of intrinsic magnetic anisotropy and the high Fe content, respectively. In order to obtain high Js, high Fe content is required. However, alloys with high Fe content exceeding the limit usually have the as-quenched structure consisting of coarse α-Fe grains in the amorphous matrix, which results in inferior magnetic softness. We have developed a new Fe85.2B10P4Cu0.8 nanocrystalline soft magnetic alloy ribbon (with 5 mm in width and about 20 μm in thickness) made from industrial raw materials in air atmosphere. The as-quenched structure of Fe85.2B10P4Cu 0.8 alloy has heterogeneous amorphous structure (a large amount of extremely small α-Fe clusters in addition to amorphous phase). Homogeneous nanocrystalline structure composed of α-Fe grains with a size ∼19 nm was realized by crystallizing the hetero-amorphous alloy. The nanocrystalline alloy exhibit high Js ∼ 1.83 T (comparable to the commercial Fe-3.5 mass% Si steel) and extremely low Hc ∼ 6.0 A/m. Additionally the alloy has a large economical and industrial advantage of lower material cost and good reproductivity, which has a high potential for the power applications.

本文言語English
ホスト出版物のタイトルMaterials Integration
出版社Trans Tech Publications Ltd
ページ99-105
ページ数7
ISBN(印刷版)9783037853764
DOI
出版ステータスPublished - 2012
イベントInt. Symposium of GCOE: Materials Integration, in Conjunction with the 2nd Int. Symposium on Advanced Synthesis and Processing Technology for Materials, ASPT 2011 and the 8th Materials Science School for Young Scientists, KINKEN-WAKATE 2011 - Sendai, Japan
継続期間: 2011 12 12011 12 2

出版物シリーズ

名前Key Engineering Materials
508
ISSN(印刷版)1013-9826
ISSN(電子版)1662-9795

Other

OtherInt. Symposium of GCOE: Materials Integration, in Conjunction with the 2nd Int. Symposium on Advanced Synthesis and Processing Technology for Materials, ASPT 2011 and the 8th Materials Science School for Young Scientists, KINKEN-WAKATE 2011
国/地域Japan
CitySendai
Period11/12/111/12/2

ASJC Scopus subject areas

  • 材料科学(全般)
  • 材料力学
  • 機械工学

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