摘要
用能量 1.7MeV不同注量的电子辐照CuZnAl形状记忆合金样品 ,通过循环水冷的方法 ,将辐照控制在马氏体相进行 .实验结果表明 ,样品被辐照处理后 ,其马氏体相变温度和相变滞后 ,以及相变特征温度T0 都随辐照注量的增大而升高 ;当辐照注量在 6 .30× 10 2 0 m- 2 ～ 1.89×10 2 1m- 2 时 ,其相变温度变化渐趋平缓 .作者认为 ,这是由于电子辐照产生的点缺陷造成了马氏体相点阵畸变 。
Specimens of shape memory CuZnAl shape memory alloys were irradiated with an energy of 1.7MeV electron over different injection capacity. During the irradiation the temperature of the sample was controlled such that the irradiation was carried out in the martensitic phase. The transformation temperature was measured under similar conditions before and after electron irradiation by means of differential scanning calorimeter (DSC).The authors found that the phase transition temperature and the hysteresis increased with increasing the fluence of the electron. And they began to keep a constant at last. The characteristic transformation temperature T 0 increased about 10K. The authors thought that the point defects make the lattice distortion of martensite phase induced by electron irradiation and bring about the stabilization of martensite, which led to the increase of transformation temperature and the hysteresis.
出处
《四川大学学报（自然科学版）》
CAS
CSCD
北大核心
2002年第3期484-486,共3页
Journal of Sichuan University(Natural Science Edition)
基金
国家自然科学基金 (10 175 0 4 2 )
关键词
电子辐照
形状记忆合金
点缺陷
马氏体相变
马氏体稳定化
electron irradiation
CuZnAl shape memory alloys
martensitic transformation
martensitic stabilization
point defect
