Measurement of carbon diffusion coefficients in Fe-C-Cr steels by chromatographic method

In the present paper it is shown that the diffusion coefficients of carbon in chromium steels at high temperatures can be measured by the use of a chr omatograph coupled onto a thermobalance. This method is suitable especially in the case of steels containing higher content of carbon. The values of D 's measured in low carbon Fe-C-Cr steels have rather qualitative character. However, all the values of D measured in the present work agree well with the diffusion coefficients D(beta(C)(i)) calculated on the basis of a model of Wagner's type.