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本工作是测量1000℃下Fe-Mn-Si三元系组元在α(δ)相的扩散系数。不同成分的合金组成扩散偶在1000℃扩散后,测量Mn和Si的成分分布曲线。根据成分分布曲线用Boltzmann-Matano方法求解得出18个成分的扩散系数。结果表明,主扩散系数D_(MnMN)~(Fe)和D_(SiSi)~(Fe)的数值接近,约为10~(-9)cm~2s~(-1)数量级;交叉扩散系数D_(MnSi)~(Fe)和D_(SiMn)~(Fe)的数值比主扩散系数小一个数量级。D_(SiSi)~(Fe)随Si和Mn的成分增加略有增加;Mn的成分对D_(MnMn)~(Fe)的数值影响不大,但随Si的成分增加而增加。
This work is to measure the diffusion coefficient of Fe-Mn-Si ternary system components in α (δ) phase at 1000 ℃. Diffusion composition of different composition of diffusion even at 1000 ℃ diffusion, the measurement of Mn and Si composition distribution curve. According to the composition distribution curve, Boltzmann-Matano method was used to obtain the diffusion coefficient of 18 components. The results show that the values of DMNMN and FeSiSi are almost the order of 10-9 cm ~ 2 s -1. The cross diffusivity D_ ( The values of MnSi) ~ (Fe) and D_ (SiMn) ~ (Fe) are one order of magnitude smaller than the main diffusion coefficient. The content of Si (subscript SiSi) ~ (Fe) increased slightly with the increase of Si and Mn. The composition of Mn had little effect on the value of Mn (Mn) Fe but increased with the increase of Si content.