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Numerical simulation of intermediate phase growth in Ti/Al alternate foils 被引量:5

Ti/Al扩散偶中间相长大过程的数值模拟(英文)
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摘要 To investigate the diffusion reaction between Ti/Al solid diffusion couple, Ti/Al alternate foils formed by hot pressing were annealed at 525, 550, 575 and 600 °C for time ranging from 1 to 40 h. The experimental results show that TiAl3 was the only observed phase at Ti/Al interface. The interface thermodynamics favored the preferential formation of TiAl3 in Ti/Al couple. The growth of TiAl3 layer occurred mainly towards Al foil side and exhibited a parabolic law. Using the interdiffusion coefficients calculated based on the contribution of grain boundary diffusion, the growth of TiAl3 was simulated numerically with the finite difference method, and the simulated results were in good agreement with the experimental ones. 为研究固态Ti/Al扩散偶的扩散反应,将Ti/Al箔构成的扩散偶分别在525,550,575和600°C退火1~40h。实验结果表明TiAl3是Ti/Al界面处生成的唯一相。TiAl3的优先长大是界面热力学作用的结果。TiAl3相主要向Al箔一侧长大,其长大过程符合抛物线规律。在晶界扩散的基础上,用有限差分方法模拟TiAl3相的长大过程,模拟结果和实验结果吻合较好。
出处 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第3期598-603,共6页 中国有色金属学报(英文版)
基金 Project (50771041) supported by the National Natural Science Foundation of China Project (05-0350) supported by the New Century Excellent Talents in University, China
关键词 hot pressing diffusion couple TIAL3 finite difference method numerical simulation 热压 扩散偶 TiAl3 有限差分 数值模拟
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