Influence of Testing Method on the Fracture Toughness of Cordierite-SiC Whisker Ceramic Composites

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J. Korean Ceram. Soc. > Volume 24(4); 1987 > Article

Journal of the Korean Ceramic Society 1987;24(4): 313.

코디어라이트-SiC위스커 복합재료에서 측정방법에 따른 파괴인성치의 변화

강대갑, Weisskopf¹

대한중석광업 주식회사
¹Max-Planck 연구소

Influence of Testing Method on the Fracture Toughness of Cordierite-SiC Whisker Ceramic Composites

ABSTRACT

Fracture toughness of hot pressed cordierite-SiC whisker ceramic composites contained up to 40vol.% SiC whiskers were determined by using the indentation crack length(IC), indentation strengthin-bending(IS), and single-edge notched-beam(SENB) methods. The results were compared to stress intensity factor, KB, at the crack branching boundary measured by using the mirror zone radius (MZ) method. IS method seems to provide a more reasonable estimation of fracture toughness than other methods for these composites.