Lee, DY Kim, DJ Kim, BY 2024-01-21T09:40:22Z 2024-01-21T09:40:22Z 2021-09-01 2002-12 0955-2219 https://pubs.kist.re.kr/handle/201004/139027 ZrO2/Al2O3 composites were prepared by mixing a tetragonal ZrO2, stabilized with 5.31 mol% Y2O3 and 4.45 mol% Nb2O5, and Al2O3 having different particle size (0.2 mum and 2.8 mum) to investigate the influence of the Al2O3 particle size on flaw tolerance of the composites. The composites exhibited rising R-curve behavior and plateau fracture toughness of 7.9 and 8.8 MPa rootm for the additions of 20 vol.% of 0.2 and 2.8 mum Al2O3 particles, respectively. The difference in the fracture resistance was attributed mainly to the grain size of tetragonal phase in the composites, which scaled with the Al2O3 particle diameter, and partially to the dispersion toughening. (C) 2002 Elsevier Science Ltd. All rights reserved. English ELSEVIER SCI LTD R-CURVE BEHAVIOR TEMPERATURE PHASE-STABILITY INDENTATION-INDUCED CRACKS TETRAGONAL ZIRCONIA MECHANICAL-PROPERTIES Y2O3-STABILIZED ZRO2 TRANSFORMATION CERAMICS STRENGTH TZP Influence of alumina particle size on fracture toughness of (Y,Nb)-TZP/Al2O3 composites Article 10.1016/S0955-2219(02)00012-2 1 JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, v.22, no.13, pp.2173 - 2179 JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 22 13 2173 2179 scie scopus 000177723900012 2-s2.0-0036883861 Materials Science, Ceramics Materials Science Article R-CURVE BEHAVIOR TEMPERATURE PHASE-STABILITY INDENTATION-INDUCED CRACKS TETRAGONAL ZIRCONIA MECHANICAL-PROPERTIES Y2O3-STABILIZED ZRO2 TRANSFORMATION CERAMICS STRENGTH TZP composites R-curve toughness Al2O3-ZrO2