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Dresden 2003 – scientific programme

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M: Metallphysik

M 15: Symposium: Phasenumwandlungen in Schmelzen V

M 15.2: Talk

Tuesday, March 25, 2003, 10:30–10:45, IFW A

Diffusion in Multicomponent Liquid Pd-Based Melts Near the Liquidus Temperature — •Axel Griesche1, Michael-Peter Macht1, Shinsuke Suzuki2, and Günter Frohberg21Hahn-Meitner-Institute Berlin, Glienicker Str. 100, D-14109 Berlin — 2Institute of Materials Sciences and Technologies, Technical University Berlin, Hardenbergstr. 36, D-10623 Berlin

Interdiffusion between Pd40Cu30Ni10P20 and Pd40Ni40P20 melts and self diffusion of Ni62 in molten Pd40Cu30Ni10P20 were measured in the temperature range from 873 K to 1373 K using the long-capillary method. The diffusion profiles were determined by means of EDX and ICP-MS. The self diffusion coefficients compare well with such ones, derived from quasi-elastic neutron scattering measurements and with diffusion coefficients calculated from viscosity data using the Stokes-Einstein relation. The correlation between the coefficients of inter- and self diffusion and the thermodynamic factor, which was calculated from literature data, was studied by use of the Darken-Manning relation.

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