Abstract
This work clarifies the origin of the characteristic discontinuities registered during the deformation of the (101̄0) plane of sapphire, by means of depth sensing indentation experiments with a spherical indenter. The sudden increase of the plasticity of the crystal was found to be caused by a twinning process. The calculation and analysis of the distribution of resolved shear stresses under a spherical indenter predicted the features of the surface deformation. The high resolution microscopic examination of the residual impressions confirmed the theoretical prediction.
| Original language | English |
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| Number of pages | 1 |
| Journal | Applied Physics Letters |
| Publication status | Published - 1995 Dec 1 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)