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。
The diffusion coefficients of Mn and Si in α(δ)-phase in an Fe-Mn-Siternary system have been determined at 1000℃. The composition profiles of Mnand Si at 1000℃ were made on the diffusion couples which composed of the alloyswith different compositions. Based on the composition profiles, the diffusion coeffi-cients of 18 compositions were obtained by using the Boltzmann-Matano method.The principal diffusion coefficients, D_(MnMn)~(Fe) and D_(SiSi)~(Fe) about 10~(-9) cm~2s~(-1), were foundto be fairly close each other, while the cross ones, D_(SiMn)~(Fe) and D_(MnSi)~(Fe), are less thanthe principal ones in one order of magnitude. D_(SiSi)~(Fe) increases slightly with the in-crease of Si and Mn compositions. And D_(MnMn)~(Fe) increases with the increase of Si com-position, but does not be affccted by Mn composition.
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