掺杂元素对Ni-Mn-Ga合金结构与性能的影响

摘要

Ni-Mn-Ga合金是一种新型的智能材料,兼具铁磁性和形状记忆效应的双重优点,以对磁场的快速响应和大的宏观可恢复应变的特点有望成为传感器和驱动器的候选材料.通过掺入金属元素可以弥补该合金马氏体相变温度低,脆性大的不足.综述了掺杂元素对合金结构、相变温度、力学性能、形状记忆效应的影响,并提出了需要深入研究的问题.%Ni-Mn-Ga alloys are a new kind of intelligent materials, which possess both ferromagnetic property and shape memory effect. It has potential applications in sensors and actuators because of its quick response to the magnetic field and large recovery straln. Doping elements can increase Martensitic transformation temperature and improve the shortage of high brittleness of the alloys. Influences of doping elements on the structure, phase transformation temperatures, mechanical properties and shape memory effect of the alloys are reviewed, and topics of needed further investigation are proposed.