British Ceramic Transactions vol:99 issue:6 pages:284-287
Cylindrical Al2O3/Ce-TZP functionally graded composites were fabricated by electrophoretic deposition and pressureless sintering in air. Negatively charged Ce-TZP and Al2O3 powders were deposited on a cylindrical electrode from an acetone based suspension. A continuous composition change is realised by changing the composition of the suspension. Sintering of the FGM at different temperatures, showed that a temperature higher than 1550 degreesC was necessary for densification. The resultant FGM cylinder with 5.6 mm dia. had an ideal mechanical structure: a central open channel, a tough Ce-ZrO2 core (K-Ic > 10 MPa m(1/2)). a continuous gradient interlayer, and a hard surface layer with HV higher than 15 GPa. BCT/443.