Lee, YI Kim, YW Choi, HJ Lee, JG 2024-01-21T12:45:38Z 2024-01-21T12:45:38Z 2021-09-05 2001-02 0022-2461 https://pubs.kist.re.kr/handle/201004/140751 Powder mixtures of beta -SiC-alpha -Si3N4 in a weight ratio of 1 : 1 containing 5-20 wt% Y-Mg-Si-Al-O-N oxynitride as a sintering additive were liquid-phase sintered at 1800 degreesC for 3 h by hot-pressing. These materials had a microstructure of "in situ-toughened composites" as a result of the alpha --> beta phase transformation of Si3N4 during sintering. The introduction of larger amount of additives accelerated the grain growth of elongated beta -Si3N4 grains with higher aspect ratio, resulting in the improved fracture toughness and strength. Typical flexural strength and fracture toughness of SiC-Si3N4 composites containing 15 wt% oxynitride glass were 860 MPa and 5.7 MPa . m(1/2), respectively. (C) 2001 Kluwer Academic Publishers. English KLUWER ACADEMIC PUBL REINFORCED OXYNITRIDE GLASS FRACTURE-TOUGHNESS SIC-TIB2 COMPOSITES GRAIN-GROWTH STRENGTH BEHAVIOR CERAMICS Effects of additive amount on microstructure and mechanical properties of silicon carbide-silicon nitride composites Article 10.1023/A:1004888908901 1 JOURNAL OF MATERIALS SCIENCE, v.36, no.3, pp.699 - 702 JOURNAL OF MATERIALS SCIENCE 36 3 699 702 scie scopus 000166740400022 2-s2.0-0034826094 Materials Science, Multidisciplinary Materials Science Article REINFORCED OXYNITRIDE GLASS FRACTURE-TOUGHNESS SIC-TIB2 COMPOSITES GRAIN-GROWTH STRENGTH BEHAVIOR CERAMICS silicon carbide