OBTENTION OF HIGHLY DISPERSED PLATELET-REINFORCED AL2O3 COMPOSITES

Authors
BELMONTE M MORENO R MOYA JS MIRANZO P
Citation
M. Belmonte et al., OBTENTION OF HIGHLY DISPERSED PLATELET-REINFORCED AL2O3 COMPOSITES, Journal of Materials Science, 29(1), 1994, pp. 179-183
Citations number
13
Categorie Soggetti
Material Science
Journal title
Journal of Materials Science → ACNP
ISSN journal
00222461
Volume
29
Issue
1
Year of publication
1994
Pages
179 - 183
Database
ISI
SICI code
0022-2461(1994)29:1<179:OOHDPA>2.0.ZU;2-L
Abstract
The rheological behaviour of alumina/platelets (Al2O3 or SiC) suspensi ons has been established by measuring zeta potential versus pH and the relative viscosity as a function of pH, solids loading and platelets content. Highly homogeneous mixtures of alumina/platelets, with differ ent platelets content (5, 8, 1 2 and 20 vol %), have been obtained by controlled flocculation at a pH value in the range 6-7. From these pow ders, very close to theoretical density (greater-than-or-equal-to 99% d(th)) and slightly oriented platelet-reinforced alumina compacts have been obtained by hot pressing at temperatures ranging from 1500-1550- degrees-C.