Effect of the preparation route on the mechanical properties of Yttria–Ceria doped Tetragonal Zirconia/Alumina composites

Yttria–ceria doped tetragonal zirconia (Y, Ce–TZP)/ alumina (Al2O3) composites were fabricated by cold isostatic pressing at 350 MPa and firing at 1500 °C up to 1650 °C in air. Y, Ce–TZP/Al2O3 composite powders were prepared using two routes: (1) sol–gel method and in situ preparation of the composites, (2) mechanical mixing of as received μm powders. In the present study, the role of the starting materials grain size on final density, microstructural development and mechanical properties of Y, Ce-TZP/Al2O3 composites were investigated. It was found that the ceramic bodies preparation route has a strong effect on the sintering behavior and mechanical properties of the final product.