Antifriction Composites Based on Phenylone C2 for Work under Conditions of Dry Friction

Abstract

The article conveys the influence of the type and the percentage of a number of fillers to the aromatic polyamide Phenylone C-2 on the physical and mechanical and tribological characteristics. Tribological tests were carried out on the friction machine II-5018 according to the scheme “finger-roller” at a fixed rate of sliding friction and stepwise loading. There are graphs of the changes of the friction coefficient value. A study of the surface of the metal counterbody (rollers) after friction was conducted in order to analyze the effect of different nanodimensional additives to composites on the micro relief of friction surface. Ra _ a parameter of changes in the average roughness was used as the main criterion in assessing the micro relief of the surface. The obtained values of the counterbody's roughness after friction made it possible to carry out a comparative evaluation of the wear resistance of the tested samples. Physical and mechanical properties of composites of different composition were studied by nanoindentation. One of the main and most interesting characteristics identified during nanoindentation is a micro-hardness. According to the test results for all the test materials, they have less micro-hardness comparing to “pure” Phenylone. Alongside with micro-hardness, we calculated there characteristics: modulus of elasticity, the ratio of the hardness of the material to its elasticity modulus, which is called the material plasticity index, and the ratio H3 / E2 which is the qualitative comparative characteristic of the plastic deformation resistance. A set of conducted research allows choosing the most rational compositions of the fillers.