Comparative study of static and cyclic fatigue of ZrB2-SiC ceramic composites. Issue 4 (April 2018)

• Record Type: Journal Article
• Authors: Lugovy, M.; Orlovskaya, N.; Slyunyayev, V.; Mitrentsis, E.; Neumann, M.; Aneziris, C.G.; Jelitto, H.; Schneider, G.A.; Kuebler, J.
• Is Part Of: Journal of the European Ceramic Society. Volume 38:Issue 4(2018)
• Page Start: 1128
• Page End: 1135
• Publication Date: 2018-04
• Subjects: ZrB2-SiC ceramic composite -- Fatigue -- Cyclic effect -- Bridging -- Crack; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2017.12.024
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Room temperature static and cyclic fatigue of ZrB2 -32 vol% SiC and ZrB2 -45 vol% SiC particulate ceramic composites has been studied. It was established that the presence of grain bridging plays an important role in the lifetime and time dependent mechanical performance of ZrB2 -SiC composites. It was also established that the cohesive strength of grain boundaries of the composites was a determining factor if grain bridging would occur during crack growth, as the grain boundaries strength would determine the pathway of the moving crack. Grain bridging was limited in ZrB2 -32 vol% SiC leading to the absence of a cyclic fatigue effect, while grain bridging indeed occurred in ZrB2 -45 vol%SiC contributing to a cyclic fatigue effect which limits the lifetime of the composite. Such differences were responsible for the occurrence of R-curve behavior in ZrB2 -SiC ceramic composites.