Ni-Fe-Ga磁致形状记忆合金中间马氏体相变  

Intermartensitic transformation of Ni-Fe-Ga magnetic shape memory alloys

作　　者：郑红星[1] 刘剑[1] 夏明许[1] 李建国[1] 

机构地区：[1]上海交通大学材料科学与工程学院,上海200030

出　　处：《物理学报》2005年第4期1719-1721,共3页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :5 0 2 740 5 1);国家杰出青年科学基金 (批准号 :5 0 12 5 10 1)资助的课题~~

摘　　要：采用差示扫描量热和x射线衍射技术研究Ni Fe Ga磁致形状记忆合金的马氏体相变行为 .结果发现 ,在多晶Ni56 5Fe1 9 0 Ga2 4 5和Ni56 3Fe1 7 0 Ga2 6 7合金中除马氏体相变外 ,还观察到一次完整的、正相变和逆相变对应出现、单纯由温度诱发的中间马氏体相变 .该中间马氏体相变与马氏体相变均为热弹性相变 .室温下合金的稳态马氏体为 14层单斜结构 .Differential scanning calorimetry (DSC) and x-ray diffraction (XRD) have been used to probe the martensitic transformation behaviors of Ni-Fe-Ga magnetic shape memory alloys. A complete intermartensitic transformation was observed in polycrystalline Ni56.5Fe19.0Ga24.5 and Ni56.3Fe17.0Ga26.7 alloys, which is stimulated by the change of temperature and includes an intermartensitic transformation and the corresponding retransformation. The intermartensitic transformation and the martensitic transformation are both thermoelastic and the martensitic phases existing at room temperature are characterized as a monoclinic 14M structure.

关 键 词：镍-铁-镓 磁致形状记忆合金 中间马氏体相变 热弹性相变 

分 类 号：TG139.6[一般工业技术—材料科学与工程]