Coercivities of hot-deformed magnets processed from amorphous and nanocrystalline precursors

Xin Tang, H. Sepehri-Amin, T. Ohkubo, K. Hioki, A. Hattori, K. Hono

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Hot-deformed magnets have been processed from amorphous and nanocrystalline precursors and their hard magnetic properties and microstructures have been investigated in order to explore the optimum process route. The hot-deformed magnets processed from an amorphous precursor exhibited the coercivity of 1.40 T that is higher than that processed from nanocrystalline powder, ∼1.28 T. The average grain size was larger in the magnets processed from amorphous precursor. Detailed microstructure analyses by aberration corrected scanning transmission electron microscopy revealed that the Nd + Pr concentrations in the intergranular phases were higher in the hot-deformed magnet processed from the amorphous precursor, which is considered to lead to the enhanced coercivity due to a stronger pinning force against magnetic domain wall motion.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalActa Materialia
Volume123
DOIs
Publication statusPublished - 2017 Jan 15
Externally publishedYes

Keywords

  • Coercivity
  • Hot deformation
  • Meltspinning
  • Nd-Fe-B
  • Permanent magnet

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

Fingerprint Dive into the research topics of 'Coercivities of hot-deformed magnets processed from amorphous and nanocrystalline precursors'. Together they form a unique fingerprint.

Cite this