Technical polymers are widespread in the machinery owing to their beneficial properties against metals as operation without lubrication, low friction and wear, light weight, corrosion resistance, low manufacturing costs etc. There are many sorts of technical polymers available of which sliding elements can be produced. To choose proper polymers for a given tribological application is not a simple task owing to many different parameters influencing the performance of a polymer sliding element. We launched a broad research project to clarify the friction and wear phenomena of plastic gears.
Hybrid syntactic foams with AlSi12 aluminum matrix were produced by pressure infiltration. The volume ratio of iron and ceramic hollow sphere reinforcement (in the same size range) was varied and hybrid syntactic foams were also produced with bimodal size ceramic reinforcement.
2Previously a very detailed analysis of the mechanical properties of the composites was made with quasi-static compression tests and their tribological properties were investigated by pin-on-disc method in dry and lubricated conditions. The present article establishes and clarifies the correlations between mechanical and tribological properties. The coefficient of friction, height loss of the specimens and specific wear showed good correlation to different mechanical parameters e.g. density, structural stiffness and yield strength.The established trends and correlations between mechanical and tribological behavior enables a better understanding for materials design and selection for further applications for mechanically loaded sliding machine parts.
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