Numerical Modeling of Zinc Diffusion During Sherardizing Process
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A finite difference method is adopted to simulate the diffusion-controlled growth of Fe-Zn multiphase layers during sherardizing process. The diffusion coefficient is defined as a temperature, composition-dependent function, and the moving of the phase boundaries is constrained by mass conservation criterion in the model. The experimental data of the thickness and concentration of multiphase layers measured by the present work are compared with the simulation results to confirm the reliability of this model in a certain range of temperature and time. Good agreement between the simulation results and the experimental data are observed. The successful simulation result of the phase growth indicates that the presently obtained model is reasonable and reliable.
Keywordsfinite difference method numerical modeling sherardizing zinc diffusion
The financial support from the National Natural Science Foundation of China (Grant No. 51471140) is acknowledged.
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