Dislocation Relaxation Phenomena in Oxide Crystals
Open Access
- 1 June 1961
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 32 (6), 1127-1132
- https://doi.org/10.1063/1.1736170
Abstract
The dislocation relaxation of MgO and Al2O3 crystals was studied by means of anelastic measurements. The experimental data are analyzed according to the theory of Seeger, Donth, and Pfaff. It is shown that the ratio of Peierls force to shear modulus is about 2×10−5 for MgO and possibly also for Al2O3. Comparison of the dislocation relaxation phenomena of oxides and metals indicates, rather surprisingly, that the ratio of Peierls force to shear modulus in oxides is about an order of magnitude smaller than that in fcc metals.Keywords
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