Martensitic transformation in Cu-doped NiMnGa magnetic shape memory alloys  

作　　者：李盼盼 王敬民 蒋成保 

机构地区：[1]Key Laboratory of Aerospace Materials and Performance (Ministry of Education),School of Materials Science and Engineering,Beihang University

出　　处：《Chinese Physics B》2011年第2期527-531,共5页中国物理B（英文版）

基　　金：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);the Fundamental Research Funds for the Central Universities

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 Nis0-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.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 Nis0-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.

关 键 词：shape memory alloys martensitic phase transformation NiCuMnGa 

分 类 号：O482.5[理学—固体物理]