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Experimental investigations of the high-temperature phase relationship and ordering transition in Ni-Mn-Ga ternary system

  • Yunqing Ma*
  • , Shuiyuan Yang
  • , Ryosuke Kainuma
  • , Kiyohito Ishida
  • , Cuiping Wang
  • , Xingjun Liu
  • *Corresponding author for this work
  • Xiamen University
  • Tohoku University

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The phase equilibria at 900 °C and B2/L21 order-disorder transition in the Ni-Mn-Ga ternary system were investigated by analyzing the equilibrated alloys and diffusion couples using a combination of techniques. It was confirmed that a bcc single phase region exists in a wide composition range at 900 °C, and the critical temperatures of B2/L21 order-disorder transition were determined in Ni-50 at.% section, which exhibits a maximal ordering transition temperature of 796°C at Mn content of 25 at.%. The obtained results will be helpful for the preparation and annealing of Ni-Mn-Ga alloys in the specific temperature.

Original languageEnglish
Title of host publicationManufacturing Processes and Systems
Pages1695-1700
Number of pages6
DOIs
StatePublished - 2011
Externally publishedYes
Event2010 International Conference on Advances in Materials and Manufacturing Processes, ICAMMP 2010 - Shenzhen, China
Duration: 6 Nov 20108 Nov 2010

Publication series

NameAdvanced Materials Research
Volume148-149
ISSN (Print)1022-6680

Conference

Conference2010 International Conference on Advances in Materials and Manufacturing Processes, ICAMMP 2010
Country/TerritoryChina
CityShenzhen
Period6/11/108/11/10

Keywords

  • Diffusion couple
  • Order-disorder transition
  • Phase equilibria

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