Abstract
Diffusion coefficients of chromium, manganese, and nickel in molten iron have been measured by the diffusion-couple technique at 1550 and 1600°C in the composition range of up to about 5 per cent.
(1) Experimental diffusion coefficients of Cr, Mn, and Ni in molten iron are as follows:
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(2) A correlation has been found between the diffusivity Dj and the standard free energy of solution ΔFj0 for the elements dissolved in molten iron, i.e., the diffusivity Dj increases with an increase of ΔFj0.
(3) Comparison of the above-mentioned finding with the previous results on the diffusion in molten carbon-saturated iron has revealed that the same functional relationship may be assumed between the diffusivity and the standard free energy of solution, irrespective of whether or not carbon is contained.
