Numerical simulation of intermediate phase growth in Ti/Al alternate foils

作者：Liu Jiang ping; Luo Liang shun; Su Yan qing^*; Xu Yan jing; Li Xin zhong; Chen Rui run; Guo Jing jie; Fu Heng zhi

来源：Transactions of Nonferrous Metals Society of China, 2011, 21(3): 598-603.

DOI：10.1016/S1003-6326(11)60756-5

• hot pressing
• diffusion couple
• TiAl(3)
• finite difference method
• numerical simulation

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 degrees C for time ranging from 1 to 40 h. The experimental results show that TiAl(3) was the only observed phase at Ti/Al interface. The interface thermodynamics favored the preferential formation of TiAl(3) in Ti/Al couple. The growth of TiAl(3) 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 TiAl(3) was simulated numerically with the finite difference method, and the simulated results were in good agreement with the experimental ones.

• 出版日期2011-3
• 单位哈尔滨工业大学