Plasticity and Creep in Single Crystals of Zirconium Carbide
- 1 December 1969
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 52 (12) , 641-647
- https://doi.org/10.1111/j.1151-2916.1969.tb16067.x
Abstract
High‐temperature deformation in ZrC single crystals was studied. Seeded crystals were grown by a direct rf‐coupling floating‐zone process. Yield stresses were measured from 1080° to 2000°C as a function of stress axis orientation. The Burgers vector was shown to be parallel to the 〈110〉 axes by transmission electron microscopy. Slip was observed on {100}, {110}, or {111} planes, depending on the orientation of the stress axis; it always occurred on the most favorably oriented slip system. The dependence of steady‐state creep rate on the applied stress indicated that recovery occurred by a dislocation climb mechanism. Examination of the dislocation structure in deformed crystals by transmission electron microscopy supported this conclusion.Keywords
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