Computer Simulation of Fe-Al-Si System Diffusion Couples

• 来源期刊: 材料科学技术学报：英文版
• 学科: 工学
• 关键词: 计算机模拟 扩散行为 铝硅 系统 铁 浓度分布 动力学性质 EPMA
• 年，卷（期）: 2011,（8）
• 页码范围: 729-734
• 页数: 6页
• 分类号: TN303|TP391.9
• 语种: 英文

摘要

DifFusion couples, Fe-6.8 wt% Al-1.0 wt% Si/Fe and Fe-6.3 wt% Al-0.9 wt% Si/Fe were constructed and separately annealed at 1050℃ for 3 h and at 1000℃ for 64 h. The concentration profiles of Fe, Al and Si atoms in these couples were measured by electron probe micro-analysis （EPMA）, while the diffusion behavior was also simulated by coupling thermodynamic and kinetic properties of Fe-Al-Si system. The simulation results were in good agreement with the measured concentration profiles showing the validity of dynamic parameters of Fe-Al-Si system, Calculation was made for Fe-7 wt% Al-1 wt% Si/Fe diffusion couples at 1000℃ with different diffusion time. Silicon uphill was found under the influence of aluminum.