Název:
Diffusion of Ni and Ga along High-Diffusivity Paths in polycrystalline Ni3Ga
Autoři:
Čermák, Jiří ; Rothová, Věra Typ dokumentu: Příspěvky z konference Konference/Akce: Diffusion and thermodynamics of materials /8./, Brno (CZ), 2002-09-04 / 2002-09-06
Rok:
2002
Jazyk:
eng
Abstrakt: 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).
Klíčová slova:
grain boundaries; Ni3Ga; radiotracer diffusion Číslo projektu: CEZ:AV0Z2041904 (CEP), GA106/01/0384 (CEP) Poskytovatel projektu: GA ČR Zdrojový dokument: Diffusion and Thermodynamics of materials /8./
Instituce: Ústav fyziky materiálů AV ČR
(web)
Informace o dostupnosti dokumentu:
Dokument je dostupný v příslušném ústavu Akademie věd ČR. Původní záznam: http://hdl.handle.net/11104/0074819