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Temperature gradients can change the concentration distribution in multicomponent materials. This cross-coupling effect of heat and mass transfer is difficult to measure in liquid alloys. We present a new method… Click to show full abstract
Temperature gradients can change the concentration distribution in multicomponent materials. This cross-coupling effect of heat and mass transfer is difficult to measure in liquid alloys. We present a new method using x-ray radiography in combination with a high temperature furnace to measure thermodiffusion in melts time and space resolved. This greatly improves the process control and allows us to determine diffusion and thermodiffusion simultaneously. In a first experiment we demonstrate that in liquid Al_{78.5}Ni_{21.5} the component nickel diffuses to the cold end of the sample with a Soret coefficient on the order of 10^{-3} K^{-1}.
Journal Title: Physical review letters
Year Published: 2019
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