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为了研究Al-Ag固溶体在氧化气氛下热处理过程中Ag的扩散行为与转变过程,采用雾化与高能球磨相结合的方法制备合金粉末,氧化反应合成制备Ag/Al2O3复合材料,通过BSE、XRD、分子动力学的方法,对形成过程的物相变化进行研究。结果表明:Al-Ag固溶体在600K能够实现较高的单质Ag的析出量,析出的Ag能够控制在纳米尺度内,析出过程伴随着Al2O3致密氧化膜的形成以及内部合金相的转变,计算模型合理地解释和预测了实验结果。
In order to study the diffusion behavior and transformation process of Ag during the heat treatment of Al-Ag solid solution in an oxidizing atmosphere, alloy powder was prepared by a combination of atomization and high-energy ball milling. The Ag / Al2O3 composite was prepared by oxidation reaction. Molecular dynamics method, the formation of the phase change process. The results show that the precipitated Ag can be controlled at the nano-scale by the Al-Ag solid solution at 600K. The formation of the dense oxide film and the transformation of the internal alloy phase are accompanied by the precipitation process. The calculation model is reasonable Explain and predict the experimental results.