(1. 北京科技大学 材料科学与工程学院，北京 100083；
2. 石家庄邮电职业技术学院 电信工程系，石家庄 050021；
3. 有研亿金新材料股份有限公司，北京 102200；
4. 北京科技大学 北京市新能源材料与技术重点实验室，北京 100083)
摘 要: 利用自制的合金低温特性测量装置研究马氏体相变温度Ms为100 K左右的Cu-Al-Mn低温形状记忆合金的形状记忆性能，并采用X射线衍射仪、光学显微镜和扫描电镜等研究其微观结构。结果表明：Cu-Al-Mn合金具有良好的形状记忆性能，其XRD谱中除含β相的衍射峰外没有其他相的衍射峰，并且有序度越高，合金的形状记忆性能越好；其它相的析出尤其是α(Cu)相的大量析出使得合金的形状记忆性能变差；在Cu-Al-Mn合金中，随着Mn和Al含量的增加，其马氏体相变温度降低。
关键字: Cu-Al-Mn合金；形状记忆效应；相变
（1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Department of Telecommunications Engineering, Shijiazhuang Post and Telecommunication Technical College,
Shijiazhuang 050021, China;
3. GRIKIN Co. Ltd., Beijing 100083, China;
4. Beijing Key Laboratory of Advanced Energy Materials and Technology,
University of Science and Technology Beijing, Beijing 100083, China）
Abstract:The shape memory effect of Cu-Al-Mn alloy with shape memory effect at Ms temperature of about 100 K was investigated by a self-made. XRD, OM and SEM were used to the microstructure of this alloy. The results show that only the peaks of β phase exist in the XRD patterns of Cu-Al-Mn alloy with good shape memory effect, and the alloy with higher degree of order has better shape memory effect. The alloy would have no shape memory effect if there are a number of α phases in it. Increase of Mn and Al content in the alloy will result in a decrease of Ms temperature.
Key words: Cu-Al-Mn alloy; shape memory effect; phase change
