Original title: Diffusion of Ni and Ga along High-Diffusivity Paths in polycrystalline Ni3Ga
Authors: Čermák, Jiří ; Rothová, Věra
Document type: Papers
Conference/Event: Diffusion and thermodynamics of materials /8./, Brno (CZ), 2002-09-04 / 2002-09-06
Year: 2002
Language: eng
Abstract: The volume and grain boundary (GB) diffusion of 63Ni and 67Ga radiotracers in polycrystals of Ni3Ga intermetallic was studied in the vicinity of stoichiometric composition A3B (23.5 - 28.3 at. % Ga). Both volume- and GB diffusivity was measured in the temperature interval 773 - 1373 K by residual activity method. Obtained Ga volume diffusivity increases with increasing Ga concentration x(Ga); the increasing tendency of Ni volume diffusivity with increasing x(Ga) is pronounced especially at lower temperatures. GB diffusivity of both Ga and Ni in Ni3Ga are close one to another and contrary to diffusion behavior of components in Ni3Al - they do not show any significant dependence on x(Ga).
Keywords: grain boundaries; Ni3Ga; radiotracer diffusion
Project no.: CEZ:AV0Z2041904 (CEP), GA106/01/0384 (CEP)
Funding provider: GA ČR
Host item entry: Diffusion and Thermodynamics of materials /8./

Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0074819

Permalink: http://www.nusl.cz/ntk/nusl-26532


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