(1. 四川大學(xué) 金屬材料系， 成都 610065；
2. 四川大學(xué) 物理系， 成都 610065;
3. 中國科學(xué)院 上海硅酸鹽研究所， 上海 200050)
摘 要: 用能量1.7MeV不同注量的電子輻照CuZnAl形狀記憶合金樣品，輻照在母相進(jìn)行。DSC實驗結(jié)果表明，輻照前后樣品的相變溫度As從339K升高到347K，Ms從330K升高到340?K，As-Ms從4K升高到7K。XRD分析結(jié)果表明輻照導(dǎo)致兩組成對晶面間距差(Δd )增大，證明輻照促進(jìn)了有序化。相變溫度的變化是由于電子輻照產(chǎn)生的點(diǎn)缺陷造成了馬氏體相點(diǎn)陣畸變和有序度的變化，從而產(chǎn)生馬氏體穩(wěn)定化。
關(guān)鍵字: 電子輻照； 形狀記憶合金； 點(diǎn)缺陷； 馬氏體相變； 馬氏體穩(wěn)定化
transition temperature of
CuZnAl shape memory alloys
LU Tie-cheng2， LIN Li-bin2， HUO Yong-zhong3
（1. Department of Metal Material， Sichuan University， Chengdu 610065, P.R.China;
2. Department of Physics， Sichuan University， Chengdu 610065, P.R.China;
3. Institute of Ceramics， Chinese Academy of Sciences， Shanghai 200050，P.R.China）
Abstract:Specimens of CuZnAl shape memory alloys were irradiated by electron irradiation with an energy of 1.7MeV. DSC results show that As increases from 339K to 347K，Ms increases from 330K to 340?K and As-Ms raises 3K after irradiation. XRD results show that Δdincreases with irradiation. The point-defects induced by electron irradiation make the lattice distortion of martensite phase and the increase of the ordering degree which bring about the stabilization of martensite.
Key words: electron irradiation; CuZnAl shape memory alloys; martensitic transformation; martensitic stabilization; point defect
