Ultra-high molecular weight polyethylene(UHMWPE) was implanted with Ar+.The modified surfaces were characterized by OM

AFM and NTM and FT-IR.And

tribological behaviour of UHMWPE was evaluated using a tribometer.The results show that alterations in surface colour

morphology and microstructure of UHMWPE were induced by Ar+ implantation

and the mechanical properties in terms of microhardness and elastic modulus were improved.The wear properties of modified UHMWPE were enhanced significantly

both in dry friction and under deionized water lubrication.The degree of property improvement increased with the implantation dose

with increasing friction coefficient

though.