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You Are Here:Home > Support > Using PIM Method For Manufacturing Unmanned Aerial vehicles Engine Ceramic Components-Support

Because of its high temperature stability, good abrasion resistance, excellent corrosion resistance, thermal shock resistance and low density (weight) characteristics, silicon nitride has been regarded as a potential ceramic material for the manufacture of transport and portable power generation machines’high efficient engine components. However, the use of silicon nitride in engine components is largely dependent on the ability to economically produce near-net-shaped components.


A research project by Oregon State University has begun investigating the use of powder injection molding of silicon nitride for the manufacture of unmanned aerial vehicle (uav) engine components. The goal is to develop an energy efficient powertrain system that can operate at remote mission locations with very low maintenance requirements.


The UAV engine project uses a new material system consisting with a mixture of nano and micron-sized silicon nitride powders. Magnesia and yttrium oxide are the sintering additives. The powder was mixed by a paraffin-based multicomponent polymer binder. The binder powder (60% by volume solids content) was analyzed for its properties and forming properties. The study involves several steps in the development and processing in the process, including: torque flowmeter analysis, mixing scale-up, binder powder performance measurements, injection molding, binder removal, sintering, scanning electron microscopy, and mechanical properties measurements using Aberger 221M forming machine.

A simulation of the injection molding process has been carried out to evaluate the feasibility of manufacturing ceramic engines and to determine the optimum process parameters. The study allowed the successful development of design parameters and the use of powder injection molding to produce silicon nitride engine components.

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