Abstract
Mixtures of ZrO2-Al2O3 ceramic composite were prepared using zirconia powder, ZrO2-Al2O3 composite powder synthesized by sol-gel process as main starting materials and zirconia gel as a binder. Then the mixtures were pressed into the mold, and then sintered at 1650°C for 3h. Finally, the ZrO2-Al2O3 ceramic composite samples were prepared. Then the mineral phases of ZrO2-Al2O3 ceramic composite were analyzed by X-ray diffraction (XRD), and the fracture model of ZrO2-Al2O3 ceramic composite was analyzed by press, scanning electron microscopy (SEM) and energy dispersive X-ray Spectroscope (EDS). The results show that, zirconia is the main phase and alumina is the secondary phase mainly present in the matrix. The fracture model of ZrO2-Al2O3 material was jointly composed by intergranular fracture and transgranular fracture, of which the coarse particle shows the intergranular fracture model and the fine particle shows the transgranular fracture model.
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