<報文>熔鉄中における珪素の拡散(第2報)

概要

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Diffusion coefficients of silicon in liquid Fe-Si and Fe-Si-C_<sat>. alloys were measured up to about 20% silicon. At low concentrations, temperature dependency of diffusion coefficient in liquid Fe-Si alloy was expressed as follows : [numerical formula] In liquid Fe-Si-C_<sat> alloy, the diffusion coefficient agreed with the value from the following equation given in the previous report : [numerical formula] The diffusion coefficient of silicon increased with the concentration of silicon both in liquid Fe-Si and Fe-Si-C_<sat>. alloys, that is, in Fe-Si alloys at 1,600℃ from 3.1×10^<-5>cm^2/sec (N=0.05) to 8.1×10^<-5> (N=0.30) and in Fe-Si-C_<sat>. alloys at 1,550℃ from 2.5×10^<-5> to 6.5×10^<-5>. These results were investigated in relation to the thermodynamic property of the liquids and it was found that the change in the diffusion coefficient of silicon with composition is determined mainly by the change in the activity coefficient with composition.
東北大学の論文
1960-08-25