Dual acceleration of ¾-¸ transformation in mnal induced by Zn-addition and in-magnetic-field annealing

Ryota Kobayashi, Akio Takaki, Yoshifuru Mitsui, Rie Y. Umetsu, Kohki Takahashi, Masaki Mizuguchi, Keiichi Koyama

Research output: Contribution to journalArticlepeer-review

Abstract

Combined accelerating effects of ¾¸ phase transformation by in-magnetic-field annealing and Zn-addition were investigated for Mn53Zn2Al45 in magnetic fields up to 15 T. The in-field annealing for Zn-added sample accelerated the ¾¸ transformation 16 times faster than Mn55Al45 at annealing temperature of 623 K. The reduction of magnetization after finishing ¾¸ transformation was also more rapid than that of Mn55Al45. However, magnetic-field-induced acceleration of ¾¸ phase transformation and suppression of precipitation of ¢-phase were observed for Zn-added alloy Mn53Zn2Al45 annealed at 573 K. The obtained results suggested that the ¢-phase stabilized against both ¸- and ¾-phases by Zn-addition. Therefore, although the ¾¸ transformation was efficiently accelerated by in-field annealing of Mn53Zn2Al45, more precisely control of annealing time is required for obtaining high fraction of ferromagnetic ¸-phase.

Original languageEnglish
Pages (from-to)124-129
Number of pages6
JournalMaterials Transactions
Volume62
Issue number1
DOIs
Publication statusPublished - 2021 Jan 1
Externally publishedYes

Keywords

  • Ferromagnetic alloys
  • High magnetic fields
  • MnAl
  • Phase transformation

ASJC Scopus subject areas

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

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