Özet:

Rheological characterization plays an important role in powder injection molding. Properties of the selected binders are related directly to the molding, pre-sintering and sintering stages. Besides the residual binding properties of the feedstock, the intended use of the binder (main binder/skeleton binder/lubricant) is also important. In this work, the flow properties of feedstock have been determined with the inclusion of a water-based main binder throughout the injection molding process of a studied ceramic composition. Rheology experiments have been carried out with both capillary and torque rheometers. In the experiments, polyethylene glycol main binder and polypropylene/polyethylene skeleton without changing the main binder (PEG4000), two different binders (PP / PE) were used as skeleton binders. Accordingly, viscosity, shear rate, temperature and melting behavior indexes were determined. In the experiment, it was determined that the critical powder volume concentration for both feedstocks was 56%.

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