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Investigation of thermal hystersis in Ni52.5Mn23.5Ga24 single crystals

  • Wen Hong Wang*
  • , Zhu Hong Liu
  • , Jing Lan Chen
  • , Guang Heng Wu
  • , Ting Liang
  • , Hui Bin Xu
  • , Wei Cai
  • , Yu Feng Zheng
  • , Lian Cheng Zhao
  • *Corresponding author for this work
  • CAS - Institute of Physics
  • Beihang University
  • Harbin Institute of Technology

Research output: Contribution to journalArticlepeer-review

Abstract

The energy consumed for phase boundary friction in a Ni52.5Mn23.5Ga24 single crystal during its martensitic transformation has been calculated based on the boundary friction phenomenological theory. We found that the energy consumed for phase boundary friction is 13.14J/mol, only a small part of the latent heat of its martensitic transformation. Furthermore, the results of thansformation loops measured by ac magnetic susceptibility proved that the thermal hysteresis of martensitic transformation is proportional to the portion of martensite produced. Therefore, this further indicates that the thermal hysteresis of the thermoelastic martensitic transformation originates from the friction of phase boundary motion.

Original languageEnglish
Pages (from-to)639
Number of pages1
JournalWuli Xuebao/Acta Physica Sinica
Volume51
Issue number3
StatePublished - Mar 2002

Keywords

  • Martensitic transformation
  • NiMnGa

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