(1. 北京科技大學(xué) 材料科學(xué)與工程學(xué)院，北京 100083；
2. 石家莊郵電職業(yè)技術(shù)學(xué)院 電信工程系，石家莊 050021；
3. 有研億金新材料股份有限公司，北京 102200；
4. 北京科技大學(xué) 北京市新能源材料與技術(shù)重點(diǎn)實(shí)驗(yàn)室，北京 100083)
摘 要: 利用自制的合金低溫特性測(cè)量裝置研究馬氏體相變溫度Ms為100 K左右的Cu-Al-Mn低溫形狀記憶合金的形狀記憶性能，并采用X射線衍射儀、光學(xué)顯微鏡和掃描電鏡等研究其微觀結(jié)構(gòu)。結(jié)果表明：Cu-Al-Mn合金具有良好的形狀記憶性能，其XRD譜中除含β相的衍射峰外沒(méi)有其他相的衍射峰，并且有序度越高，合金的形狀記憶性能越好；其它相的析出尤其是α(Cu)相的大量析出使得合金的形狀記憶性能變差；在Cu-Al-Mn合金中，隨著Mn和Al含量的增加，其馬氏體相變溫度降低。
關(guān)鍵字: Cu-Al-Mn合金；形狀記憶效應(yīng)；相變
（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
