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Chin. Phys. B, 2011, Vol. 20(2): 028104    DOI: 10.1088/1674-1056/20/2/028104
INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY Prev   Next  

Martensitic transformation in Cu-doped NiMnGa magnetic shape memory alloys

Li Pan-Pan(李盼盼), Wang Jing-Min(王敬民), and Jiang Cheng-Bao(蒋成保)
Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing 100191, China
Abstract  This paper studies the martensitic transformation in the Cu-doped NiMnGa alloys. The orthorhombic martensite transforms to L21 cubic austenite by Cu substituting for Ni in the Ni50-xCuxMn31Ga19 (x=2-10) alloys, the martensitic transformation temperature decreases significantly with the rate of 40 K per Cu atom addition. The variation of the Fermi sphere radius (kF) is applied to evaluate the change of the martensitic transformation temperature. The increase of kF leads to the increase of the martensitic transformation temperature.
Keywords:  shape memory alloys      martensitic phase transformation      NiCuMnGa  
Received:  20 August 2010      Revised:  09 September 2010      Accepted manuscript online: 
PACS:  81.30.Kf (Martensitic transformations)  
  61.66.Dk (Alloys )  
Fund: Project supported by the National Natural Science Foundation for Distinguished Young Scholars of China (Grant No. 50925101), Science Fund for Creative Research Groups of the National Natural Science Foundation of China (Grant No. 50921003) and the Fundamental Research Funds for the Central Universities.

Cite this article: 

Li Pan-Pan(李盼盼), Wang Jing-Min(王敬民), and Jiang Cheng-Bao(蒋成保) Martensitic transformation in Cu-doped NiMnGa magnetic shape memory alloys 2011 Chin. Phys. B 20 028104

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