Mechanical properties of zirconia toughened alumina prepared by different methods

Resume Des ceramiques alumineuses renforcees par de l a zircone ont Gte preparees par deux procedes d i f f e r e n t ~ a pa r t i r des memes matieres premieres (poudres). Le premier u t i l i s e l e broyage par a t t r i t i o n e t l a compression I chaud ; l e second, une dispersion 6lectrochimique, l e coulage en barbotine e t l e f r i t tage sans charge. L'influence des parametres d'elaboration sur les proprietes mecaniques des pieces denses e s t examinee. L'influence des teneurs en ZrOz e t Y203 e s t discutee. Abstract Zi rconia Toughened A1 umina (ZTA) ceramics were prepared by two different methods from the same raw materials (powders). The f i r s t one using a t t r i t i on milling and hot-pressing ; the second, electrochemical dispersion, s l i p casting and pressureless sintering. The influence of the processing parameters on the mechanical properties of dense material i s examined. The influence of Zr02 and Y203 contents i s discussed.