Processing and Properties of Al2O3-ZrO2(3Y)-SiC Nanocomposites

Abstract

Abstract: The Al₂O₃-ZrO₂(3Y)-SiC composite powders were made by the heterogeneous precipitation method. For getting dense sintered body, the selection of the calcining temperatures was important. The addition of ZrO₂ did not
change the hot-pressing sinter temperatures, and the dense bodies could be got at 1700℃. Nano SiC particles were uniformly located in Al₂O₃
grains because of the transformation of Al₂O₃ from γ phase to α phase. Larger ZrO₂ particles were located among Al₂O₃
grains, and little spherical ZrO₂particles were located in Al₂O₃ grains. Some Al₂O₃ grains were no-equiaxed. The strength of Al₂O₃-SiC
nanocomposites was 555MPa, toughness was 3.8 MPa·m^1/2.

Key words: nanocomposite, precessing, Al₂O₃, microstructure

CLC Number:

TB323

WANG Hong-Zhi,GAO Lian,GUI Lin-Hua,GUO Jing-Kun. Processing and Properties of Al₂O₃-ZrO₂(3Y)-SiC Nanocomposites[J]. Journal of Inorganic Materials.

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Processing and Properties of Al₂O₃-ZrO₂(3Y)-SiC Nanocomposites

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