Initial Stage Carbonization of gamma-Fe(100) Surface in C2H2 under High Temperature: A Molecular Dynamic Simulation
Y Sun and L Wang and H Wang and ZQ He and LH Yang and XF Chen, MATERIALS, 14, 5957 (2021).
In the present work, initial stage carbonization of gamma-Fe(100) surface in C2H2 from 1000 K to 1600 K has been investigated by a molecular dynamic (MD) simulation, based on which the atomic mechanism of initial stage carbonization was provided. The absorption of C and H atoms during the carbonization process under different temperatures was analyzed. The related distributions of C and H atoms in carbonized layer were provided. The results manifested that higher temperature enhanced the inward diffusion of C and H, meanwhile caused the desorption of H atom. Furthermore, the effect of preset polycrystal gamma-Fe on the carbonization process has been discussed, indicating a promoting role to the absorption and inner diffusion of C and H atom. The results of this study may support the optimal design of high-performance steel to some extent.
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