It was recalled that, when in situ techniques became available, this had led to a breakthrough in accurately determining the diffusion coefficients for liquid alloys. It was related here how neutron radiography could be used to measure chemical diffusion in a ternary alloy. Neutron radiography furnished complementary information to the X-ray radiography used for measuring chemical diffusion and to the quasi-elastic neutron scattering used mainly for determining self-diffusion. A novel Al2O3-based furnace that permitted the study of diffusion processes by means of neutron radiography was described. A chemical diffusion coefficient of Ag against Al around the eutectic composition Al68.6Cu13.8Ag17.6 (at%) was obtained. It was demonstrated that the in situ technique of neutron radiography was a powerful means to study mass transport properties in situ in binary and ternary alloys that exhibited poor X-ray contrast.

In situ Studies of Mass Transport in Liquid Alloys by Means of Neutron Radiography. F.Kargl, M.Engelhardt, F.Yang, H.Weis, P.Schmakat, B.Schillinger, A.Griesche, A.Meyer: Journal of Physics - Condensed Matter, 2011, 23[25], 254201