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

Acta Metall Sin

1991, Vol. 27

Issue (3): 106-110 DOI:

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

ZHU Xiaohe;YU Yongning University of Science and Technology Beijing

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ZHU Xiaohe;YU Yongning University of Science and Technology Beijing. DIFFUSION COEFFICIENTS IN α(δ)-PHASE OF Fe-Mn-Si TERNARY SYSTEM AT 1000℃. Acta Metall Sin, 1991, 27(3): 106-110.

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Abstract 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.

Key words: diffusion coefficient Fe-Mn-Si system

Received: 18 March 1991

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