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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。
The diffusion behavior of Al atoms in Cu44.25Ag14.75Zr36Ti5 bulk metallic glass (BMG) and crystalline alloys was investigated by SIMS ion stripping with a stepper. The results show that the diffusion coefficient of Al atoms in metallic glass is between 3.691 × 10-21 ~ 1.063-16 × 10-20m2.s-1 at 300 ~ 390 ℃, and the diffusion coefficient in the crystalline alloy is between 2.038 × 10- 16 ~ 5.674 × 10-16m2.s-1, the diffusion coefficient and temperature in line with a single Arrhenius relationship. Al atom diffuses in the way that the whole mass of atoms is transported in Cu44.25Ag14.75Zr36Ti5BMG. In the crystalline alloy, vacancies and interstitial diffusion dominate.