Interdiffusion in the Fe2O3-TiO2 system
来源期刊：International Journal of Minerals Metallurgy and Materials2013年第3期
论文作者：Zhong-shan Ren Xiao-jun Hu Shen-yang Li Xiang-xin Xue Kuo-chih Chou
文章页码：273 - 278
摘 要：Interdiffusion in the Fe2O3-TiO2 system was investigated by the diffusion couple method in the temperature range of 1323 to 1473 K. The diffusion concentration curves of Ti 4+ cations were obtained by electron probe microanalysis, according to which the Boltzmann-Matano method optimized by Broeder was used to calculate the interdiffusion coefficients. The interdiffusion coefficients almost increased linearly with the mole fraction of Ti 4+ cations increasing, and they were in the range of 10-12-10-11 cm2 ·s-1 . The increase of temperature could also lead to the increase of the interdiffusion coefficients at a constant concentration of Ti 4+ cations. It was also found that the thickness growth of the diffusion layer obeyed the parabolic rate law.
Zhong-shan Ren1,2，Xiao-jun Hu1,2，Shen-yang Li1,2，Xiang-xin Xue3，Kuo-chih Chou1,2
1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing2. School of Metallurgical Ecological Engineering, University of Science and Technology Beijing3. School of Materials and Metallurgy, Northeastern University
摘 要：Interdiffusion in the Fe2O3-TiO2 system was investigated by the diffusion couple method in the temperature range of 1323 to 1473 K. The diffusion concentration curves of Ti 4+ cations were obtained by electron probe microanalysis, according to which the Boltzmann-Matano method optimized by Broeder was used to calculate the interdiffusion coefficients. The interdiffusion coefficients almost increased linearly with the mole fraction of Ti 4+ cations increasing, and they were in the range of 10-12-10-11 cm2 ·s-1 . The increase of temperature could also lead to the increase of the interdiffusion coefficients at a constant concentration of Ti 4+ cations. It was also found that the thickness growth of the diffusion layer obeyed the parabolic rate law.
关键词：
