Suppression of non-oriented grains in Nd-Fe-B hot-deformed magnets by Nb doping

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

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

0.2 at.%Nb doping to a Nd12.83Fe76.7Co4.50Ga0.53B5.44 alloy suppress the surface crystallization in melt-spun ribbon, thereby suppressing the formation of non-oriented grains during the hot-deformation process to form bulk anisotropic magnet, which leads to the enhancement of remanence. High resolution transmission electron microscopy and three-dimension atom probe tomography revealed that the segregation of Nb at the grain boundaries hinders the grain growth during the hot-deformation process, thereby reducing the size and the aspect ratio of Nd2Fe14B grains and increasing coercivity.

Original languageEnglish
Pages (from-to)108-113
Number of pages6
JournalScripta Materialia
Volume147
DOIs
Publication statusPublished - 2018 Apr 1
Externally publishedYes

Keywords

  • Coercivity
  • Hot-deformed magnet
  • Nd-Fe-B
  • Permanent magnet
  • Remanence

ASJC Scopus subject areas

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

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