Interdiffusion in potassium-lead melts in a wide range of concentrations
R.N. Abdullaev1, R.A. Khairulin2, and S.V. Stankus2
1 Novosibirsk State University, Novosibirsk, Russia
2 Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
E-mail: stankus@itp.nsc.ru
Keywords: diffusion, melt, potassium-lead system, gamma-ray attenuation technique
Abstract
Interdiffusion in potassium-lead melts containing 30, 40, 50, 66.7, and 84.4 at. % Pb was investigated using gamma-ray attenuation technique in the temperature range from 550 to 970 K. It was found that the concentration dependence of interdiffusion coefficient has a maximum in the vicinity of 40–50 at. % Pb. It was shown that this feature is associated with the trend of forming ionic complexes of K4Pb4 in liquid alloys.
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