Cylindrical Al₂O₃ /TZP functionally graded materials by EPD

Authors: Zhao, C.; vandeperre, L.; Vleugels, J.; van der Biest, O.

Source: British Ceramic Transactions, Volume 99, Number 6, June 2000 , pp. 284-287(4)

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Abstract:

Cylindrical Al₂O₃/Ce–TZP functionally graded com posites 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 chang ing the composition of the suspension. Sintering of the FGM at different temperatures, showed that a temper ature higher than 1550°C 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.

Document Type: Regular Paper

DOI: http://dx.doi.org/10.1179/096797800681018

Affiliations: The Department of Metallurgy and Materials Engineering, Katholiek Universiteit Leuven, Arenbergkasteel, De Croylaan, 2, B-3001 Heverlee, Belgium

Publication date: 2000-06-01

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