Free Access
| Issue |
J. Phys. IV France
Volume 11, Number PR10, Décembre 2001
Journées d'Étude des Équilibres entre Phases
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| Page(s) | Pr10-127 - Pr10-131 | |
| DOI | https://doi.org/10.1051/jp4:20011018 | |
Journées d'Étude des Équilibres entre Phases
J. Phys. IV France 11 (2001) Pr10-127-Pr10-131
DOI: 10.1051/jp4:20011018
Faculté des Sciences (Physiques), USTHB, BP. 32, El-Alia, Dar-El-Beida, Alger, Algeria
© EDP Sciences 2001
J. Phys. IV France 11 (2001) Pr10-127-Pr10-131
DOI: 10.1051/jp4:20011018
Diffusivité du joint de grain durant la précipitation discontinue de solutions solides sursaturées Mg-Al et Mg-Al-Cd
D. Bradai, B. Alili and M. Kadi-HanifiFaculté des Sciences (Physiques), USTHB, BP. 32, El-Alia, Dar-El-Beida, Alger, Algeria
Abstract
The grain boundary chemical diffusivity triple product SδDb parameter ( s being the Gibbs segregation factor, δ the thickness and Db the chemical diffusivity of the grain boundary) of Al in a binary MgAl and a ternary MgAlCd solid solutions during the discontinuous precipitation reaction have been determined using several analytical models. A comparison of the values obtained with the experimental data and the deduction of the activation energy confirm the reaction to be controlled by diffusion of Al atoms at the migrating grain boundary.
© EDP Sciences 2001