本文研究了淬火冷却过程中Cu:Cu-Al扩散偶α/β界面的逆向迁移,α/β界面的变温扩散模型在Fick第二定律基础上用数值分析法进行了计算.界面逆向迁移的距离和下列因素有关:高温时的原始浓度分布、扩散温度、扩散系数、冷却速率和相图中溶解度曲线的斜率.“界面逆向迁移效应”还影响了浓度分布曲线的形状和界面浓度.
The“interface withdrawal”across the α/β interface in Cu:Cu-Al diffusioncouples during quenching has been investigated.Using numerical analysis basedon the Fick's second law,the non-isothermal diffusion modeling across the α/βinterface was carried out in comparison with the experimental results.The distan-ce of interface withdrawal depends on the initial concentration profile at thehigh temperature,the diffusion annealing temperature,the diffusion coefficients,the cooling rate and the slope of the solves curves in the phase diagram.Thewithdrawal effect influences the shape of the concentration profile and the inter-facial concentration.
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