Kesan suhu pensinteran terhadap sifat mekanik dan mikrostruktur alumina-zirkonia yang difabrikasi dengan kaedah pengacuan suntikan seramik

Abstract

The effects of sintering temperature on the mechanical properties and microstructure of alumina-zirconia composite were investigated. Alumina-zirconia parts were successfully fabricated via ceramic injection moulding method using a multi-component binder system. The debound parts were sintered at temperatures of 1400, 1450, 1500, 1550, 1600 and 1650°C for 2 h after debinding process. Furthermore, the density, hardness and fracture toughness of the sintered parts were measured. The microstructure of the sintered part was observed via scanning electron microscope. The results showed that the density, hardness and fracture toughness of the sintered parts increase with increasing sintering temperature. The experimental results also indicate that the mechanical properties of the materials achieve maximum conditions at a sintering temperature of 1650°C. The densification of the sintered parts is close to 98.1% of the theoretical density with a hardness of 16.9 GPa and a fracture toughness of 3.95 MPa.m1/2. The results can be attributed to the microstructure of the dense material being driven by complete grain growth.