TY - JOUR
T1 - Microscopic diffusion mechanisms in Fe-Al, Ni-Ga and (Ni Fe)-Al B2 phases
AU - Sepiol, Bogdan
AU - Löser, W
AU - Kaisermayr, Martin
AU - Weinkamer, Richard
AU - Fratzl, Peter
AU - Thiess, H
AU - Sladecek, Marcel
AU - Vogl, Gero
N1 - Zeitschrift: Diffusion and Defect Data. Pt A Defect and Diffusion Forum
Coden: DDAFE
Affiliations: Institut für Materialphysik, Universität Wien, Strudelhofgasse 4, AT-1090 Wien, Austria; Institut für Metallische Werkstoffe, IFW Dresden, Postfach 270016, DE-01171 Dresden, Germany; Erich Schmid Institut, Institut für Metallphysik, AT-8700 Leoben, Austria; European Synchrotron Radiation Facility, FR-38043 Grenoble, France; Hahn-Meitner Institut, DE-14109 Berlin, Germany
Adressen: Sepiol, B.; Institut für Materialphysik; Universität Wien; Strudelhofgasse 4 AT-1090 Wien, Austria
Import aus Scopus: 2-s2.0-17344376273
17.12.2007: Datenanforderung 2031 (Import Sachbearbeiter)
PY - 2001
Y1 - 2001
N2 - With methods derived from nuclear physics like Mössbauer spectroscopy, quasielastic neutron scattering and nuclear resonant scattering of synchrotron radiation, the elementary diffusion jump mechanism in B2 alloys has been investigated. The diffusion of (a) iron in Fe-Al alloys from stoichiometric B2 up to the disordered bcc-phase, (b) nickel in Ni-Ga alloys and (c) iron in the ternary intermetallic phase (Ni0.8Fe0.2)0.5Al0.5 is explained with the same elementary diffusion jump based on exchanges between vacancies and their nearest-neighbour atoms only. The features of the diffusion path, which depend decisively on the investigated system, can be understood assuming an interaction of the vacancy with the locally disordered areas in the B2 lattice. Experimental results are compared with results from Monte Carlo simulations providing estimates of the interaction energies between vacancies and atoms. Œ 2001 Scitec Publications.
AB - With methods derived from nuclear physics like Mössbauer spectroscopy, quasielastic neutron scattering and nuclear resonant scattering of synchrotron radiation, the elementary diffusion jump mechanism in B2 alloys has been investigated. The diffusion of (a) iron in Fe-Al alloys from stoichiometric B2 up to the disordered bcc-phase, (b) nickel in Ni-Ga alloys and (c) iron in the ternary intermetallic phase (Ni0.8Fe0.2)0.5Al0.5 is explained with the same elementary diffusion jump based on exchanges between vacancies and their nearest-neighbour atoms only. The features of the diffusion path, which depend decisively on the investigated system, can be understood assuming an interaction of the vacancy with the locally disordered areas in the B2 lattice. Experimental results are compared with results from Monte Carlo simulations providing estimates of the interaction energies between vacancies and atoms. Œ 2001 Scitec Publications.
U2 - 10.4028/www.scientific.net/DDF.194-199.349
DO - 10.4028/www.scientific.net/DDF.194-199.349
M3 - Article
SN - 1012-0386
SP - 349
EP - 356
JO - Defect and Diffusion Forum
JF - Defect and Diffusion Forum
IS - 194-199 PA
ER -