Statistical analysis of fracture toughness of SiC ceramics determined by Vickers indentation method
by Lidija Ćurković; Vera Rede; Marijo Lalić
International Journal of Microstructure and Materials Properties (IJMMP), Vol. 6, No. 5, 2011

Abstract: In this paper fracture toughness, K_IC, of CVD SiC ceramics was determined by measuring the crack lengths associate with a Vickers indentation. It is well known that the measured fracture of brittle ceramics shows large variability. Therefore, the probabilistic characteristics of fracture toughness were analysed by a two-parameter Weibull distribution function, with scale parameter, K₀, and the Weibull modulus, m. These parameters were determined by the linear regression method for K_IC data measured at load of 9.81, 29.43, 49.01 and 98.1 N, respectively. It was found that the measured fracture toughness follow a Weibull distribution.

Online publication date: Wed, 09-Nov-2011

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