Study on tribological properties of explosion sprayed AlCuFeSc quasicrystal coating
In this paper,AlCuFeSc quasicrystal coating was prepared by explosive spraying.The microstructure and phase structure of the quasicrystal coating were characterized by SEM and XRD,and the surface hardness of the quasicrystal coating was tested by a microhardness tester.It is mainly composed of quasicrystalline phase and β-AlFe.The surface hardness of the coating at room temperature is 569.4HV0.3,and the highest hardness of the coating can reach 658.33HV0.3 after annealing treatment.Meanwhile,the friction and wear properties of AlCuFeSc quasicrystal coating under different loads of 5 N,15 N and 25 N at room temperature and at 700 ℃ were studied.The three-dimensional morphology of wear marks was observed by white light interferometer,and the width,depth and volume loss of wear mark were calculated,and the wear rate was obtained;the morphology characteristics of wear marks under different test conditions were analyzed by SEM.The research results show that the wear coefficients of AlCuFeSc quasicrystal coatings at different temperatures and loads were between 0.500 and 0.656(all lower than those of the substrate).The main change is mainly adhesive wear;the wear mechanism in high temperature environment is mainly adhesive wear.
spraying explosionquasicrystal coatingfriction and wearhigh temperature frictionwear mechanism
万方数据
维普
