Cho, KS Choi, HJ Lee, JG Kim, YW 2024-01-21T17:34:15Z 2024-01-21T17:34:15Z 2022-01-11 1998-01 0272-8842 https://pubs.kist.re.kr/handle/201004/143302 Powder mixtures of beta-SiC-30 wt% TiB2 containing 5 wt% (ST1), 10 wt% (ST2), and 20 wt% (ST3) Al2O3-Y2O3 as sintering additives were liquid-phase sintered at 1850 degrees C for 1 h by hot-pressing and subsequently annealed at 1950 degrees C for 2, 6, and 12 h. These materials had a microstructure of 'in situ toughened composites' as a result of the beta --> alpha phase transformation of SiC during annealing. The introduction of larger amount of additives accelerated the grain growth of elongated alpha-SiC grains with higher aspect ratio, resulting in the improved fracture toughness. The fracture toughnesses of 12-h annealed materials with 5, 10, and 20 wt% additives were 5.7, 5.9, and 7.1 MPam(1/2), respectively. (C) 1998 Elsevier Science Limited and Techna S.r.l. All rights reserved. English ELSEVIER SCI LTD TOUGHENED SILICON-CARBIDE GRAIN-SIZE DEPENDENCE MECHANICAL-PROPERTIES CERAMICS RESISTANCE ENERGY Effects of additive amount on microstructure and fracture toughness of SiC-TiB2 composites Article 10.1016/S0272-8842(97)00015-1 1 CERAMICS INTERNATIONAL, v.24, no.4, pp.299 - 305 CERAMICS INTERNATIONAL 24 4 299 305 scie scopus 000074985300010 2-s2.0-0031641881 Materials Science, Ceramics Materials Science Article TOUGHENED SILICON-CARBIDE GRAIN-SIZE DEPENDENCE MECHANICAL-PROPERTIES CERAMICS RESISTANCE ENERGY