Kim, YW Mitomo, M Emoto, H Lee, JG 2024-01-21T16:31:32Z 2024-01-21T16:31:32Z 2021-09-03 1998-12 0002-7820 https://pubs.kist.re.kr/handle/201004/142713 By using alpha- and beta-SiC starting powders with similar particle sizes, the effects of initial cu-phase content on the microstructure and the mechanical properties of the liquid-phase-sintered and subsequently annealed materials were investigated. The microstructures developed were analyzed by image analysis. When beta-SiC powder was used, the grains became elongated. The average diameter decreased with increasing alpha-SiC content and the aspect ratio showed a maximum at 10% alpha-SiC and decreased with increasing alpha-SiC content in the starting powder. Such results suggest that microstructure can be controlled by changing alpha-phase content in starting powders. The strength increased with increasing alpha-SiC content in the starting powder while the fracture toughness decreased with increasing alpha-SiC content. There may be a trade-off in improving both the strength and toughness in SiC ceramics sintered with oxide additives. English AMER CERAMIC SOC R-CURVE BEHAVIOR FRACTURE-TOUGHNESS BETA->ALPHA TRANSFORMATION AL2O3 ADDITIONS CERAMICS NITRIDE Effect of initial alpha-phase content on microstructure and mechanical properties of sintered silicon carbide Article 10.1111/j.1151-2916.1998.tb02748.x 1 JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.81, no.12, pp.3136 - 3140 JOURNAL OF THE AMERICAN CERAMIC SOCIETY 81 12 3136 3140 scie scopus 000077588000010 2-s2.0-0032297867 Materials Science, Ceramics Materials Science Article R-CURVE BEHAVIOR FRACTURE-TOUGHNESS BETA->ALPHA TRANSFORMATION AL2O3 ADDITIONS CERAMICS NITRIDE