| Numéro |
J. Phys. III France
Volume 3, Numéro 2, February 1993
|
|
|---|---|---|
| Page(s) | 179 - 183 | |
| DOI | https://doi.org/10.1051/jp3:1993125 | |
J. Phys. III France 3 (1993) 179-183
On impurity segregation on dislocations in metals
Yu. S. Netchaev1 and L. V. Mukhina21 Moscow Institute of Steel and Alloys, 4 Lenin avenue, Russia
2 Technical University, Karanganda Metallurgical Combine, Kazakhstan
(Received 14 September 1990, revised and accepted 15 October 1992)
Abstract
Thermodynamic and crystallo-chemistry considerations are given about the possibility
of existing linear distribution laws for some impurities in metals between bulk
solution and near-dislocation segregation regions (NDSR) with composition and structure
close to the corresponding intermetallic compound. The solutions of Fe in Al
are considered. NDSR composition can be close to FeAl
3. The experimental data
on the solubilities are treated within the model developed to determine the
effective binding enthalpy which is close to the dissolution enthalpy of
the FeAl
3 compound in Al. The effective distribution law differs from true
adsorption forms. It is valid for limited concentration range and connected to
the phase diagram change for the NDSR. The known diffusion anomalies for
transition impurities in Al are satisfactory explained with using this distribution law.
© Les Editions de Physique 1993