Improved soft magnetic properties of nanocrystalline Fe-M-B-Cu (M = Zr, Nb) alloys with high saturation magnetic flux density and zero-magnetostriction

A. Makino, A. Inoue, T. Hatanai, T. Bitoh

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The compositional dependence and the annealing temperature dependence of the soft magnetic properties for the nanocrystalline Fe-M-B-Cu (M = Nb, Zr) alloys have been investigated. The high effective permeability, μe, above 100,000 at 1 kHz combined with the high saturation magnetic flux density, Bs, of 1.45 to 1.61 T have been obtained in the Fe100-a-b-c-dNbaZrbBcCud (3.25 ≤ a ≤ 3.5, b ≈ a, 6.5 ≤ c ≤ 8 and 1 ≤ d ≤ 2) alloys. These alloys consist of fine bcc grains with less than 10 nm in size and exhibit nearly or exactly zero-magnetostriction. This excellent μe value is comparable to those of nanocrystalline Fe73.5Si13.5B9Nb3Cu1 alloy and zero-magnetostrictive Co based amorphous alloys, and the high Bs is comparable to those of Fe based amorphous alloys with good soft magnetic properties. The magnetostriction of the nanocrystalline Fe-M-B based alloys also can be controlled by changing the annealing (crystallizing) temperature. The nanocrystalline Fe-M-B based alloys with excellent soft magnetic properties as well as high Bs and zero-magnetostriction are expected to be used for many kind of magnetic parts and devices.

Original languageEnglish
Pages (from-to)723-728
Number of pages6
JournalMaterials Science Forum
Volume235-238
Issue numberPART 2
Publication statusPublished - 1997
Externally publishedYes

Keywords

  • Nanocrystalline alloy
  • Permeability
  • Saturation magnetic flux density
  • Soft magnetic properties
  • Zero-magnetostriction

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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