Computer Simulation of Fe-Al-Si System Diffusion Couples

材料科学技术（英文）, 2011, 27(8): 729-734.

Computer Simulation of Fe-Al-Si System Diffusion Couples

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1.School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China

2.School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China

3.Cold Rolling Plant of Ansteel, Anshan 114021, China

4.School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China

5.School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China／Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven, Kasteelpark Arenberg 44, B-3001 Heverlee, Belgium

6.Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven, Kasteelpark Arenberg 44, B-3001 Heverlee, Belgium

基金项目: the National Basic Research program of China(2010CB630802) This work was financially supported by the National Natural Science Foundation of China(50971137;50934011)

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

Computer Simulation of Fe-Al-Si System Diffusion Couples

Keywords： Diffusion kinetics , Fe-Al-Si system , Thermo-calc and DICTRA ,

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.

参考文献

[1]	G. Ghosh;G.B. Olson .Precipitation of paraequilibrium cementite: Experiments, and thermodynamic and kinetic modeling[J].Acta materialia,2002(8):2099-2119.
[2]	T. HELANDER;J. AGREN .A PHENOMENOLOGICAL TREATMENT OF DIFFUSION IN Al-Fe AND Al-Ni ALLOYS HAVING B2-B.C.C. ORDERED STRUCTURE[J].Acta materialia,1999(4):1141-1152.

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Computer Simulation of Fe-Al-Si System Diffusion Couples

Computer Simulation of Fe-Al-Si System Diffusion Couples

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