HTHP Home • Issue Contents • Forthcoming Papers

Self diffusion in Al-Ni-Ce and Al-Ni-La melts
Axel Griesche, Suresh Mavila Chathoth, Michael-Peter Macht, Günter Frohberg, Marek Koza and Andreas Meyer

Self diffusion of Ni and Ce in Al-Ni-Ce and Al-Ni-La melts has been investigated by quasi-elastic neutron scattering and by the long-capillary technique showing comparable results for both methods. The investigated temperature range reached from the liquidus temperature up to 1795 K. Self diffusion of Ni in Al-Ni-(rare earth element) melts is slower than in binary Al-Ni melts and scales with the amount of the rare earth element. Diffusion coefficients calculated with help of the Stokes-Einstein equation from experimental viscosity data from literature support the diffusion coefficient measurements only in the case of Ce additions. For La additions the calculated diffusion coefficients increase.

full text (IP)