Ni and Ga Diffusion in Polycrystalline Ni3Ga

0177929 - UFM-A 20023121 RIV NL eng J - Journal Article
Čermák, Jiří - Rothová, Věra
Ni and Ga Diffusion in Polycrystalline Ni3Ga.
Intermetallics. Roč. 10, č. 8 (2002), s. 765 - 769. ISSN 0966-9795. E-ISSN 1879-0216
R&D Projects: GA ČR GA106/01/0384
Institutional research plan: CEZ:AV0Z2041904
Keywords : intermetallics * radiotracer diffusion * Ni3Ga
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 1.338, year: 2002

The volume and grain boundary (GB) diffusion of 63Ni and 67Ga radiotracers in polycrystals of Ni3Ga intermetallic was studied in the vicinity of the stoichiometric composition A3B (23.5-28.3 at.% Ga). Both volume and GB diffusivity was investigated in the temperature interval 773-1373 K by the residual activity method. The obtained Ga volume diffusivity increases with increasing Ga concentration x(Ga); the increasing tendency of Ni volume diffusivity with increasing x(Ga) is pronounced at lower temperatures. GB diffusivity of both Ga and Ni in Ni3Ga are close one to another and -contrary to the diffusion behavior of components in Ni3Al - they do not show any significant dependence on x(Ga).
Permanent Link: http://hdl.handle.net/11104/0074832