<報文>炭素飽和熔鐵中の珪素及びマンガンの擴散(補遺)

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Blank values accompanied with the measurements of diffusion in molten state were examined with respect to diffusion of Si and Mn in molten Fe-C alloys. Diffusion coefficients of Si and Mn reported in the previous papers were recomputed by using an appropriate correction method with the following results. i) Diffusion coefficients of Si in Fe-C (saturated)-Si(1.5%) alloys can be expressed as follows : logD(cm^2/sec)=-3.62-0.179×10^4/ T, or D(cm^2/sec)=2.40×10^<-4>e^<-4.12×10^3>/T. Activation energy Q≒8,200 cal/g・atom That is, diffusion coefficient D between 1,400-1,600℃ was 2.0-2.7×10^<-5>cm^2/sec. ii) Those of Mn in Fe-C (saturated)-Mn(2.5%) alloys can be expressed as follows : logD(cm^2/sec)=-3.71-0.127×10^4/T, or D(cm^2/sec)=1.93×10^<-4>e^<-2.92×10^3>/T, Activation energy Q≒5,800 cal/g・atom That is, diffusion coefficient D between 1,300-1,600℃ was 3.0-4.1×10^<-5> cm^2/sec.
東北大学の論文
1956-07-31