Fe-Mn-Si三元系在1000℃α(δ)相的扩散系数  

DIFFUSION COEFFICIENTS IN α(δ)-PHASE OF Fe-Mn-Si TERNARY SYSTEM AT 1000℃

作　　者：朱小和 余永宁[1] 

机构地区：[1]北京科技大学

出　　处：《金属学报》1991年第3期B166-B170,共5页Acta Metallurgica Sinica

摘　　要：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-Si ternary system have been determined at 1000℃. The composition profiles of Mn and Si at 1000℃ were made on the diffusion couples which composed of the alloys with 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 found to be fairly close each other, while the cross ones, D_(SiMn)^(Fe) and D_(MnSi)^(Fe), are less than the 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.

关 键 词：FeMnSi合金 扩散系数 

分 类 号：TG141[一般工业技术—材料科学与工程]