Climb dissociation in {113} planes in Al-Mg spinels
Open Access
- 1 January 1982
- journal article
- Published by EDP Sciences in Journal de Physique
- Vol. 43 (7) , 1149-1157
- https://doi.org/10.1051/jphys:019820043070114900
Abstract
Dislocations in Mg-Al spinels exhibit a very peculiar phenomenon. At high temperature they are dissociated off their glide plane (climb dissociation). { 100} and {110} dissociation planes have already been characterized. One reports here experimental evidence that {113} planes are also possible dissociation planes with similar fault energies. Comparison of these various possible faults is made on the basis of crystallographic considerations (mismatches in the cationic configurations in and around the fault planes). It is found that, at least for non equimolar spinel, because of the large cationic vacancy density, {113} faults should not be more energetic that the other ones, as far as these faults are electrically neutral (i.e. the removed layer does not change the chemical composition of the material)Keywords
This publication has 7 references indexed in Scilit:
- Summary Dislocation motion and high temperature plasticity of binary and ternary oxidesAdvances in Physics, 1979
- Climb dissociation of network dislocations in non–stoichiometric Mg–Al spinelPhilosophical Magazine A, 1979
- Sessile dissociation in the stoichiometric spinel MgAl2O4Journal de Physique, 1979
- Mass transport by dislocation climb in the spinel latticeRevue de Physique Appliquée, 1979
- High temperature creep behaviour of nearly stoichiometric alumina spinelJournal of Materials Science, 1978
- Sous-joints de dislocations et dissociations dans le ferrite de nickel déformé plastiquement à 0,85 TFPhilosophical Magazine, 1976
- The defect structure and mechanical properties of spinel single crystalsPhilosophical Magazine, 1968