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

doi:10.2320/matertrans.MRP2008126

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 journal › Article › peer-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, M_s -M_f, 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 language	English
Pages (from-to)	1915-1918
Number of pages	4
Journal	Materials Transactions
Volume	49
Issue number	8
DOIs	https://doi.org/10.2320/matertrans.MRP2008126
Publication status	Published - 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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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.",

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AU - Ito, Kouhei

AU - Ito, Wataru

AU - Umetsu, Rie Y.

AU - Nagasako, Makoto

AU - Kainuma, Ryosuke

AU - Fujita, Asaya

AU - Oikawa, Katsunari

AU - Ishida, Kiyohito

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AB - 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.

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KW - Powder metallurgy

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