Al原子在Cu44.25Ag14.75Zr36Ti5大块金属玻璃中的扩散
Diffusion of Al in Cu44.25Ag14.75Zr36Ti5 Bulk Metallic Glass
王有良
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作者单位：兰州理工大学
中文关键字：二次离子质谱; 大块金属玻璃 ; 扩散
英文关键字：SIMS;bulk metallic glasses;diffusion mechanism
中文摘要：采用二次离子质谱仪（SIMS）离子剥落方式结合台阶仪对比研究了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。实验结果表明：在300℃～390℃温度区间内，Al原子在金属玻璃中的扩散系数 位于3.691×10-21 m2s-1～1.063×10-20 m2s-1之间，在晶态合金中的扩散系数 位于2.038×10-16 m2s-1～5.674×10-16 m2s-1 之间，其扩散系数和温度的关系符合单一的Arrhenius关系式。Al原子在Cu44.25Ag14.75Zr36Ti5 BMG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。
英文摘要：Secondary ion mass spectroscopy (SIMS) and Ion beam Sputtering Profiling had been adopted to study diffusion of Al in Cu44.25Ag14.75Zr36Ti5 bulk metallic glass (BMG) and crystalline alloys. It had been found that the diffusion coefficients of Al in Cu44.25Ag14.75Zr36Ti5 bulk metallic glass (BMG) and crystalline alloys are 3.691×10-21 m2s-1~ 1.063×10-20 m2s-1 and 2.038×10-16 m2s-1 ~ 5.674×10-16 m2s-1 respectively under the temperature 300℃ to 390℃. The relation between its diffusion coefficient and the temperature satisfy the same Arrhenius relation, which means the metallic transition has not caused change to the diffusion mechanism. Al in Cu44.25Ag14.75Zr36Ti5 bulk metallic glass (BMG) diffuse by autom group,and Al in crystalline alloys diffuse by space and gap style.