Preparation of Zirconia-Toughened Alumina Ceramics through the Dispersal Basic Carbonate Precursors

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Using NH4HCO3 solution as precipitant, the ultrafine 3Y-ZrO2/Al2O3 precursors were prepared by the liquid-phase precipitation method. The well-dispersible ZrO2/Al2O3 composite nanopowders with particle size 10nm were obtained by calcining the precursor at 1000°C. The XRD patterns show no γ-Al2O3 and θ-Al2O3 formed during calcination. The powders have excellent sinterability and the relative density of specimen is up to 99% after sintering the green compacts at 1550°C. Microstructural analysis of the sintered bodies reveals the uniform distribution of the zirconia grains in the alumina matrix.

Info:

Periodical:

Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong

Pages:

1137-1140

DOI:

10.4028/www.scientific.net/KEM.336-338.1137

Citation:

J. Q. Wang et al., "Preparation of Zirconia-Toughened Alumina Ceramics through the Dispersal Basic Carbonate Precursors", Key Engineering Materials, Vols. 336-338, pp. 1137-1140, 2007

Online since:

April 2007

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$35.00

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