摘要
采用二次离子质谱仪(SIMS)离子剥落方式结合台阶仪研究了Al原子在Cu44.25Ag14.75Zr36Ti5大块金属玻璃(BMG)和晶态合金中的扩散行为。结果表明:在300～390℃,Al原子在金属玻璃中的扩散系数位于3.691×10-21～1.063-16×10-20m2.s-1;在晶态合金中的扩散系数位于2.038×10-16～5.674×10-16m2.s-1,其扩散系数和温度的关系符合单一的Arrhenius关系式。Al原子在Cu44.25Ag14.75Zr36Ti5BMG以原子团整体输运的方式扩散,在晶态合金中以空位和间隙扩散为主。
Secondary ion mass spectroscopy （SIMS） and Ion beam Sputtering Profiling were adopted to study the diffusion of A1 in Cu44.25Ag14.75Zr36Ti5 bulk metallic glass （BMG） and crystalline alloys. The results show that the diffusion coefficients of A1 in Cu44.25Ag14.75Zr36Ti5 bulk metallic glass （BMG） and crystalline alloys are 3.691 × 10^-21- 1.063 × 10^-20m^2. s^-1and 2.038 × 10^-16-5.674× 10^-16m^2 .s^-1 respectively under the temperature of 300 ℃to 390 ℃. The relation between its diffusion coefficient and the temperature satisfy the same Arrhenius relation, which means that the metallic transition has not caused change to the diffusion mechanism. A1 in Cu44.25Ag14.75Zr36Ti5 bulk metallic glass （BMG） is diffused by autom group, and AI in crystalline alloys can be diffused by space and gap style.
出处
《热加工工艺》
CSCD
北大核心
2012年第12期22-24,共3页
Hot Working Technology
基金
国家自然科学基金资助项目(51061008)
