Entropy Change during Martensitic Transformation in Ni50-xCoxMn50-yAly Metamagnetic Shape Memory Alloys

Xiao Xu, Wataru Ito, Takeshi Kanomata, Ryosuke Kainuma

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Specific heat was systematically measured by the heat flow method in Ni50-xCoxMn50-yAly metamagnetic shape memory alloys near the martensitic transformation temperatures. Martensitic transformation and ferromagnetic-paramagnetic transition for the parent phase were directly observed via the specific heat measurements. On the basis of the experimental results, the entropy change was estimated and it was found to show an abrupt decrease below the Curie temperature. The results were found to be consistent with those of earlier studies on Ni-Co-Mn-Al alloys.

Original languageEnglish
Pages (from-to)1808-1818
Number of pages11
JournalEntropy
Volume16
Issue number3
DOIs
Publication statusPublished - 2014 Mar

Keywords

  • Entropy change
  • Kinetic arrest
  • Martensitic transformation
  • Metamagnetic shape memory alloy
  • Ni-Co-Mn-Al
  • Specific heat
  • Thermal transformation arrest

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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