Fatigue-crack growth and fracture properties of coarse and fine-grained Ti3SiC2

• Published in: Scripta materialia Vol. 42; no. 8; pp. 761 - 767
• Main Authors: GILBERT, C. J, BLOYER, D. R, BARSOUM, M. W, EL-RAGHY, T, TOMSIA, A. P, RITCHIE, R. O
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Science 14-04-2000
• Subjects: Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Fatigue, brittleness, fracture, and cracks; Mechanical and acoustical properties of condensed matter; Mechanical properties of solids; Physics; Fracture mechanics; Coarse grain structure; Theoretical study; Mechanical properties; Silicon carbides; Fine grain structure; SEM; Titanium carbides; Ceramics; Crack propagation resistance; Fatigue cracks; Crack propagation
• ISSN: 1359-6462; 1872-8456
• DOI: 10.1016/s1359-6462(99)00427-3

An experimental study is conducted of the fracture and fatigue-crack growth behavior of reactively hot-pressed monolithic Ti3SiC2 ceramic having both fine and coarse-grained microstructures. The coarse-grained samples yield R-curve fracture toughness values that are among the highest ever established for a monolithic nontransforming ceramic; this is consistent with the profusion of crack-bridging processes active in the crack wake. (AIAA)