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

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

doi:10.1063/1.115713

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

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

Institute of Multidisciplinary Research for Advanced Materials (IMRAM)

Research output: Contribution to journal › Article › peer-review

48 Citations (Scopus)

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
Pages (from-to)	1063-1065
Number of pages	3
Journal	Applied Physics Letters
Volume	68
Issue number	8
DOIs	https://doi.org/10.1063/1.115713
Publication status	Published - 1996

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.115713

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abstract = "This work clarifies the origin of the characteristic discontinuities registered during the deformation of the (10{\=1}0) 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.",

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AU - Niihara, K.

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AB - 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.

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

Abstract

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