INFLUENCE OF TFE EXPLOITATION TEST CONDITIONS ON FRICTION AND WEAR OF POLYMER COMPOSITES
Keywords:
antifriction composite, coefficient of friction, wear rate, roughness, sliding speed.Abstract
The creation of new composite self-lubricating polymer materials with the use of Armenian minerals, and the study of the filler influence on tribological processes and working parameters of tribojoints is an actual problem in machine and device building.The developed composites are characterized by increased wear resistance, improved strength characteristics, and a reduced coefficient of friction, which expands the range of possibilities of their application in modern friction units of machines.The processes of friction and wear of antifriction self-lubricating polymer materials are significantly determined by the phenomenon of friction transfer, which is an important aspect of the adhesion mechanism of polymer wear and plays a significant role in the mechanism of self-lubrication of metal-polymer friction pairs.
The analysis of tribological tests of composite materials depending on test conditions is carried out. The tribological behavior of polyphenilene sulfide filled with molybdenum concentrate and polytetrafluoroethilene sliding against a steel counterface is investigated. The influence of the filler proportions, sliding speed and counterface roughness on the wear rate and coefficient of friction of the self-lubricating polymer-based composites has been studied. For this purpose pin-on-disk configuration and the design of experimental approach utilizing Taguchi’s orthogonal arrays are used, allowing to make a reasonable choice of composites with minimum wear.
