Influence of particle shape on microstructure and magnetic properties of iron powder cores

Takuya Takashita, Naomichi Nakamura, Yukiko Ozaki

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The coercive force of an iron powder core decreases with an increase in the circularity of the base iron powder. Microstructural observation reveals that the crystal grain size of the iron powder core is reduced by recrystallization during stress relief annealing after powder compaction. An analysis of the work hardening behavior during the compaction process shows that a rounder particle shape leads to smaller particle deformation, resulting in a reduced grain refinement effect during recrystallization. A grain boundary pinning model convincingly describes the reduction of coercive force with the increase in the eventual grain size.

Original languageEnglish
Pages (from-to)1859-1867
Number of pages9
JournalMaterials Transactions
Volume57
Issue number11
DOIs
Publication statusPublished - Jan 1 2016

Fingerprint

Iron powder
Magnetic properties
magnetic properties
Coercive force
iron
microstructure
Microstructure
Compaction
Stress relief
grain size
Grain refinement
Strain hardening
Powders
work hardening
Grain boundaries
Annealing
Crystals
grain boundaries
annealing
crystals

All Science Journal Classification (ASJC) codes

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

Cite this

Influence of particle shape on microstructure and magnetic properties of iron powder cores. / Takashita, Takuya; Nakamura, Naomichi; Ozaki, Yukiko.

In: Materials Transactions, Vol. 57, No. 11, 01.01.2016, p. 1859-1867.

Research output: Contribution to journalArticle

Takashita, Takuya ; Nakamura, Naomichi ; Ozaki, Yukiko. / Influence of particle shape on microstructure and magnetic properties of iron powder cores. In: Materials Transactions. 2016 ; Vol. 57, No. 11. pp. 1859-1867.
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