Friction and wear properties of PA surface treated aramid fibre reinforced thermoplastic polyimide composite

Abstract

Phosphoric acid (PA) modification method was used for the surface treatment of aramid fibre to improve the interfacial adhesion of the aramid fibre reinforced polyimide (PI) composite. The surface characteristics of untreated and treated aramid fibre were characterised by X-ray photoelectron spectroscopy. The friction and wear properties of the PI composites filled with differently surface treated aramid fibres (20 vol.-%), sliding against GCr15 steel, were investigated on a ball on block reciprocating UMT-2MT tribometer. Experimental results revealed that PA treatment largely reduced the friction and wear of aramid/PI composites. Scanning electron microscope investigation of worn surfaces of PI composites showed that PA treated aramid/PI composite had strong interfacial adhesion and smooth worn surface under given load and reciprocating sliding frequency.

Keywords

ECP ARAMID FIBRE PI INTERFACIAL ADHESION FRICTION AND WEAR

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