Martensitic transformation in Cu-doped NiMnGa magnetic shape memory alloys

doi:10.1088/1674-1056/20/2/028104

中国物理B ›› 2011, Vol. 20 ›› Issue (2): 28104-028104.doi: 10.1088/1674-1056/20/2/028104

Martensitic transformation in Cu-doped NiMnGa magnetic shape memory alloys

李盼盼, 王敬民, 蒋成保

Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing 100191, China

收稿日期:2010-08-20 修回日期:2010-09-09 出版日期:2011-02-15 发布日期:2011-02-15
基金资助:
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.

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

Received:2010-08-20 Revised:2010-09-09 Online:2011-02-15 Published:2011-02-15
Supported by:
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.

摘要/Abstract

摘要： 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 Ni_50-xCu_xMn₃₁Ga₁₉ (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 (k_F) is applied to evaluate the change of the martensitic transformation temperature. The increase of k_F leads to the increase of the martensitic transformation temperature.

关键词: shape memory alloys, martensitic phase transformation, NiCuMnGa

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 Ni_50-xCu_xMn₃₁Ga₁₉ (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 (k_F) is applied to evaluate the change of the martensitic transformation temperature. The increase of k_F leads to the increase of the martensitic transformation temperature.

Key words: shape memory alloys, martensitic phase transformation, NiCuMnGa

中图分类号: (Martensitic transformations)

81.30.Kf

61.66.Dk (Alloys )

李盼盼, 王敬民, 蒋成保. Martensitic transformation in Cu-doped NiMnGa magnetic shape memory alloys[J]. 中国物理B, 2011, 20(2): 28104-028104.

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[J]. Chin. Phys. B, 2011, 20(2): 28104-028104.

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Martensitic transformation in Cu-doped NiMnGa magnetic shape memory alloys

Martensitic transformation in Cu-doped NiMnGa magnetic shape memory alloys

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