V. Srdic et L. Radonjic, INTERACTIONS IN THE SOL-GEL PROCESSING OF ALUMINA-ZIRCONIA COMPOSITES, Journal of the European Ceramic Society, 14(3), 1994, pp. 237-244
The combined effect of alumina and zirconia on the phase transformatio
n and microstructure development of heat-treated alumina-zirconia comp
osites has been studied The composites were prepared by the sol-gel pr
ocess, using two different alumina matrices (polymer and particulate)
and three different types of zirconia particles. The influence of the
different zirconia particles on the phase transformation and microstru
cture development of the alumina matrix is clearly evident. In additio
n, stability of tetragonal zirconia in the alumina matrix is considera
bly changed, in respect to pure zirconia powder. These effects are exp
lained by the existence of a mutual intel action between the zirconia
and the transitional aluminas, which is stronger if the alumina and zi
rconia particles are smaller and more intimately mixed.