POLYMERS AND COMPOSITE
Today, polymers and composites are widely used as structural materials in various components and engineering systems due to their excellent specific properties. Polymers and composites are used in bearings, gears, etc., where liquid lubricants cannot be used due to various restrictions. It is widely used in tribology applications such as Some polymers and composites show excellent material potential in abrasive, adhesive, vibratory, reciprocating and erosive wear situations. Compared to metals it offers some extra benefits, such as easy workability and designer freedom in forming (especially with thermoplastics). However, compared to metals, composites present different and significantly more complex damage and failure mechanisms that also affect the safety of the parts involved.
Polymers and composites are composed of a large number of components such as dust, sand, material particles, solid particle slurry, such as high-speed vehicles and aircraft, radomes, helicopter rotor blades, gas and steam turbine blades, pump impeller blades, locomotive gears, conveyor belts, sand-carrying pipelines. It is used in applications where it is exposed to the effect of the abrasive and therefore the materials are subject to erosive wear. Therefore, it becomes imperative to study the erosive wear behavior of polymeric engineering materials under various operating conditions [6,7]. Polymers and polymer composites exhibit very poor erosion resistance compared to metals, with erosion resistance two or three times lower than that of metal materials. Also, none of the models proposed for conventional materials can be adopted to reliably predict the wear behavior of polymers and polymer composites [2,6]. The absence or inadequacy of current predictive models intensifies the need to establish a database of information on the erosion behavior of polymers and polymer composites. This is why the erosion behavior of polymers and related composites has been extensively studied over the past three decades.