Diamond-like carbon(DLC)films were deposited on 7A04 aluminium alloy by plasma immersion ion implantation and deposition(PIII&D)to enhance the micro-hardness and wear resistance.The microstructure,microhardness,adhesion property and tribological property of the samples were measured by Raman spectra,microhardness meter,nanoscratch tests and ball-on-disk wear test,respectively.The effects of gas pressure on microstructure,micro-hardness and wear resistance were studied.The results show that the films synthes...