1983 Volume 91 Issue 1052 Pages 171-175
The strength of sintered β-sialon was measured at room temperature. The average strength was 534MPa. The Weibull modulus calculated from 25 measurements was 6.5. The value excluding two abnormally low strength specimens was 8.8, comparable to that of hot-pressed β-sialon. The fractures were originated from surfaces or interior defects. The average strength and Weibull modulus of specimens fractured from surfaces were 490MPa and 4.7, respectively, while those fractured from the interior was 564MPa and 10.6, respectively. Almost all of the interior defects were large voids or clustered pores. The surface defects were flaws or interior defects exposed to surfaces by polishing.
