Studies Regarding the Influence of Loading Force on the Wear Intensity in Case of Polymeric Composite Materials Reinforced with Short Carbon Fibers

Abstract

This paper presents a study of the wearing behaviour of polymeric composite materials reinforced with short carbon fibres. Reinforces carbon fiber materials are more effective if refer to specific properties per unit volume compared to conventional isotropic materials. The composite materials used in this research work are obtained combining epoxy with short carbon fibres with titanium carbide and tantalum carbide in order to investigate the wearing intensity of the obtained composites. Varying the percent of epoxy from 29,35% to 43,92% and the percent of short carbon fibres from 35,43% to 53,70%, two different composite materials are obtained and tested. Wearing intensity tests are carried out, at room temperature, in dry conditions, on a pin-on-disc machine. The friction coefficient was measured maintaining constant the rotational speed (14 m/s) and time (120s) and varying the pin-on-disc pressing force: 4, 8 and 12 daN. The pressing load had different effects on the wearing behaviour of the composite coating in dry friction condition. With low percent of epoxy and high percent of carbon fibers the wearing intensity is touching the highest value and gradually decreases with the increasing load, while in low percent of carbon fibers the wearing intensity became larger gradually along with the load increasing.