3YTZP-Al2O3 Powders Synthesized by the Coprecipitation Route

Abstract:

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The addition of alumina in a zirconia stabilized in a tetragonal phase matrix enhances ceramic hardness and inhibits the tetragonal → monoclinic phase transformation of zirconia when exposed to an aqueous environment. These characteristics are important for applications such as bioceramics and structural materials. For these purposes, the strict control of powder synthesis and the processing conditions are vital to tailor the ceramic characteristics. This work evaluates the influence of 20 wt% alumina in a Y-TZP matrix on powder characteristics, obtained by coprecipitation route, and calcined from 600 to 1200°C for 1 and 3 hours. The powders obtained were characterized by X-ray diffraction, scanning electronic microscopy, laser diffraction and gaseous adsorption (BET). The results reveal that presence of Al3+ inhibits the crystallization of composite at lower temperatures.

Info:

Periodical:

Materials Science Forum (Volumes 530-531)

Edited by:

Lucio Salgado and Francisco Ambrozio Filho

Pages:

677-682

DOI:

10.4028/www.scientific.net/MSF.530-531.677

Citation:

R.H.L. Garcia et al., "3YTZP-Al2O3 Powders Synthesized by the Coprecipitation Route", Materials Science Forum, Vols. 530-531, pp. 677-682, 2006

Online since:

November 2006

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Price:

$35.00

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