Deformation of sapphire induced by a spherical indentation on the (101̄0) plane

R. Nowak, T. Sekino, S. Maruno, K. Niihara

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


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 languageEnglish
Number of pages1
JournalApplied Physics Letters
Publication statusPublished - 1995 Dec 1

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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