Abstract
Interdiffusion coefficients of the refractory elements in Fe-Cr-X (X=Mo, W) and Fe-Mo-W ternary alloys were measured on the basis of the modified Boltzmann-Matano method for ternary systems. The cross interdiffusion coefficient, ildeDCrWFe was positive in Fe-Cr-W ternary alloy, indicating that W accelerates interdiffusion between Fe and Cr atoms. On the other hand, the cross interdiffusion coefficient, ildeDCrMoFe was negative in Fe-Cr-Mo ternary alloys, indicating that Mo suppresses interdiffusion between Fe and Cr atoms. In addition, the cross interdiffusion coefficient, ildeDWMoFe was positive in Fe-Mo-W diffusion system. This result implies that Mo addition accelerates interdiffusion between Fe and W.
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