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Influence of loading rate on nanohardness of sapphire.
- Source :
-
Ceramics International . Sep2016, Vol. 42 Issue 12, p13378-13386. 9p. - Publication Year :
- 2016
-
Abstract
- This work reports the loading rate effect on nanohardness of sapphire. The intrinsic nanoscale contact deformation resistance of sapphire increased with the loading rates following empirical power law dependence with a positive exponent. The results showed a significant enhancement (e.g., ~66%) of the nanohardness of sapphire with the increase in loading rates from 10 to 10,000 μN s −1 . These results were explained mainly in terms of the maximum shear stress generated underneath the nanoindenter, dislocation density and critical resolved shear stress of the sapphire. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 42
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 116405946
- Full Text :
- https://doi.org/10.1016/j.ceramint.2016.05.091