Dislocations in Indented Magnesium Oxide Crystals
- 1 September 1960
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 31 (9) , 1538-1545
- https://doi.org/10.1063/1.1735889
Abstract
Dislocation rosette patterns produced by spherical and pyramidal indentors on the cleaved surfaces of magnesium oxide crystals were studied in detail. The three‐dimensional arrangement of dislocation loops as deduced from the two‐dimensional etching patterns is discussed. Cracks formed on {110}90 planes around pyramidal indentations are believed to be due to the interaction of dislocations on {110}45 planes. The temperature dependence of hardness was found to be related to the widening of dislocation bands, rather than to the distance of travel of leading dislocations. Some observations were also made on the pinning of dislocations and recovery at elevated temperatures, and on the interaction of dislocations with grown‐in subboundaries.This publication has 16 references indexed in Scilit:
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