This study investigates the effects of injection temperature and pressure on green part density. The high density of the green parts for the ceramic injection molding (CIM) process improves the material properties of the final product. In this study, the feedstock used was a combination of alumina and zirconia powders with a binder consisting of high density polyethylene, paraffin wax, and stearic acid. Powder loading was fixed at 57% volume. A standard screw-type injection molding machine was used to produce the green parts. The density of the green parts was measured using the Archimedes method. Experimental results show that a 160 °C injection temperature and a 110 MPainjection pressure were the optimum parameters to achieve high density of the green parts. In addition, defect-free green parts were obtained.
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 multicomponent binder system. The debound parts were sintered at temperatures of 1400, 1450, 1500, 1550, 1600
The optimum powder loading of feedstock based on an alumina–zirconia powder was investigated. The optimum powder loading were important to avoid any problems that may arise during the ceramic injection molding (CIM) process. The optimum powder loading is determined based on the critical powder loading and the characterization of the material rheological properties. The critical powder loading was determined using an oil absorption method, and the rheological studies were conducted using a capillary rheometer machine. The results showed that a 57 vol.% powder loading is the most suitable and optimal for the CIM process.
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