Martensitic transformation in NiCoMnSn metamagnetic shape memory alloy powders

Kouhei Ito, Wataru Ito, Rie Y. Umetsu, Makoto Nagasako, Ryosuke Kainuma, Asaya Fujita, Katsunari Oikawa, Kiyohito Ishida

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Martensitic and magnetic properties of NiCoMnSn metamagnetic shape memory alloy powders obtained by a gas atomization method were investigated. The as-atomized powders showed a dendritic structure which changed to a single-phase one by annealing at 1173 K for 2 h. Although the martensitic transformation behavior was almost the same as that in bulk samples, the transformation thermal interval, namely, Ms -Mf, of the as-annealed powders decreased with increasing annealing time. In the powders annealed at 1173 K for 144 h, a reversible metamagnetic phase transition was confirmed by the application of a magnetic field of 7 T.

Original languageEnglish
Pages (from-to)1915-1918
Number of pages4
JournalMaterials Transactions
Volume49
Issue number8
DOIs
Publication statusPublished - 2008 Aug

Keywords

  • Martensitic transformation
  • Metamagnetic shape memory alloys
  • Powder metallurgy

ASJC Scopus subject areas

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

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