Phase transformation of Ni2MnGa made by the spark plasma sintering method

Zheng Wang, Minoru Matsumoto, Toshihiko Abe, Katsunari Oikawa, Jinhao Qiu, Toshiyuki Takagi, Junji Tani

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Heusler compound Ni2MnGa was prepared by the spark plasma sintering (SPS) technique. The sintering was done with a maximum pressure of 80 MPa and a maximum temperature of 1173 K for 300 approx. 600 s. The relative density of the as-sintered alloy was 99.6%. The grinding-induced stress results in the suppression of phase transformation in the assintered alloy. Heat treatment was subsequently performed at 1073 K for 864 ks in vacuum, slowly cooled for recovering the phase transformation. After heat treatment the martensitic transformation temperatures, Ms, Mf, As, Af, of the sintered alloy can be determined as 235, 220, 239 and 254 K respectively.

Original languageEnglish
Pages (from-to)389-391
Number of pages3
JournalMaterials Transactions, JIM
Volume40
Issue number5
DOIs
Publication statusPublished - 1999 May

ASJC Scopus subject areas

  • Engineering(all)

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