Evaluation of Fracture Toughness of Structural Ceramic by Instrumented Indentation

Abstract:

Fracture toughness of structural ceramic materials can be obtained with one instrumented macro-indentation tester with a Vickers indenter, which is superior to the traditional method which first uses a nanoindentation tester or other instruments to get elastic modulus and then use a large load hardness tester to make crack on the sample surface. Fracture toughness of two ceramic materials: silicon nitride and zirconium oxide is tested on the instrumented macro-indentation tester. The results are 5.93 ~7.05MPam^1/2 and 7.68~8.57 MPam^1/2.

• Periodical: Applied Mechanics and Materials (Volume 312)
• Pages: 575-578
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.312.575
• Online since: February 2013
• Authors: Zhong Kang Song, De Jun Ma, Wei Chen, Jun Hong Guo
• Keywords: Elastic Modulus, Fracture Toughness, Instrumented Indentation, Vickers Hardness

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