Kim, JY Kim, YW Lee, JG Cho, KS 2024-01-21T15:33:27Z 2024-01-21T15:33:27Z 2021-09-05 1999-05-15 0022-2461 https://pubs.kist.re.kr/handle/201004/142186 Alpha-SIG powder containing 7.2 wt% Y3Al5O12 (YAG, yttrium aluminum garnet) and 4.8 wt% SiO2 as sintering aids were hot-pressed (SC0) at 1820 degrees C for 1 h and subsequently annealed at 1920 degrees C for 2 h (SC2), 4 h (SC4) and 8 h (SC8). When the annealing time was increased, the microstructure changed from equiaxed to elongated grains and resulted in self-reinforced microstructure consisted of large elongated grains and small equiaxed grains. Development of self-reinforced microstructure, consisted of mostly 6H phase, resulted in significant improvements in toughness. However, the improved toughness was offset by a significant reduction in strength as in the materials consisted of 4H originated from beta-SiC The fracture toughness and strength of the 8-h annealed materials were 5.5 MPa.m(1/2) and 490 MPa, respectively. (C) 1999 Kluwer Academic Publishers. English KLUWER ACADEMIC PUBL FRACTURE-TOUGHNESS AL2O3 ADDITIONS MICROSTRUCTURE Effect of annealing on mechanical properties of self-reinforced alpha-silicon carbide Article 10.1023/A:1004585910170 1 JOURNAL OF MATERIALS SCIENCE, v.34, no.10, pp.2325 - 2330 JOURNAL OF MATERIALS SCIENCE 34 10 2325 2330 scie scopus 000080836100009 2-s2.0-0032667246 Materials Science, Multidisciplinary Materials Science Article FRACTURE-TOUGHNESS AL2O3 ADDITIONS MICROSTRUCTURE silicon carbide