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An Improved Indentation Method for Estimating Limits of Fracture Toughness in Brittle Films
- Source :
- Advanced Materials Research. 1095:598-602
- Publication Year :
- 2015
- Publisher :
- Trans Tech Publications, Ltd., 2015.
-
Abstract
- We previously presented an energy method for predicting the bounds of fracture toughness of brittle films on a soft substrate from nanoindentation. The method is now further improved by minimizing elastic-plastic work from the measured energy during ring crack formation. Then, we applied this method to determine the limits of fracture toughness of alumina films with a thickness of 100 nm. It was found that fracture toughness of the films is in the range of 1.8-2.2 MPa.m0.5, which is consistent with those measured by the conventional method.
Details
- ISSN :
- 16628985
- Volume :
- 1095
- Database :
- OpenAIRE
- Journal :
- Advanced Materials Research
- Accession number :
- edsair.doi...........147ed793c1fd26be84a0993975c2afad