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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationMaterials Integration
PublisherTrans Tech Publications Ltd
Pages99-105
Number of pages7
ISBN (Print)9783037853764
DOIs
Publication statusPublished - 2012
EventInt. 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
Duration: 2011 Dec 12011 Dec 2

Publication series

NameKey Engineering Materials
Volume508
ISSN (Print)1013-9826
ISSN (Electronic)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
Country/TerritoryJapan
CitySendai
Period11/12/111/12/2

Keywords

  • Amorphous alloy
  • High saturation magnetic polarization
  • Nanocrystalline alloy
  • Soft magnetic material

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint

Dive into the research topics of 'New Fe-B-P-Cu nanocrystalline soft magnetic alloys with high J<sub>s</sub> combined with low coercivity H<sub>c</sub>'. Together they form a unique fingerprint.

Cite this