Low core losses of nanocrystalline Fe-Zr-Nb-B soft manetic alloys with high magnetic flux density

A. Makino, T. Bitoh, A. Kojima, A. Inoue, T. Masumoto

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


The soft magnetic properties of the nanocrystalline Fe-Zr-Nb-B alloys, which are mixed Fe-Zr-B alloy with negative magnetostricton and Fe-Nb-B alloy with positive one, have been investigated. The magnetostricton and the grain size of the Fe-Zr-Nb-B alloys show intermediate values between those of the Fe-Zr-B and Fe-Nb-B alloys. The soft magnetic properties are strongly affected by Zr + Nb amount and Zr/Nb ratio. The best soft magnetic properties have been obtained for the Fe85.5Zr2Nb4B8.5 alloy. The alloy shows a high permeability of 60 000 at 1 kHz, a high saturation magnetic flux density of 1.64 T and zero-magnetostriction, simultaneously. The alloy also exhibits a very low core loss of 0.09 W/kg at 1.4 T and 50 Hz, which is extremely lower than that of Fe-Si-B amorphous, and good thermal stability of the core loss. The nanocrystalline Fe-Zr-Nb-B alloy is therefore suitable for a core material for pole transformers.

Original languageEnglish
Pages (from-to)1083-1086
Number of pages4
JournalMaterials Science and Engineering A
Issue number1-2
Publication statusPublished - 2001 May 31
Externally publishedYes


  • Core loss
  • Crystallization
  • Melt-spun ribbon
  • Nanocrystalline alloy
  • Permeability
  • Saturation magnetic flux density
  • Soft magnetic properties
  • Thermal stability
  • Zero-magnetostriction

ASJC Scopus subject areas

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


Dive into the research topics of 'Low core losses of nanocrystalline Fe-Zr-Nb-B soft manetic alloys with high magnetic flux density'. Together they form a unique fingerprint.

Cite this