Abstract: Dry sliding wear between the polycrystalline Al₅₉Cu_25.5Fe_12.5B₃ quasicrystals and coating of the Diamond-Like Carbon(DIC)is carried out by self-made tribometer under different conditions.the influences of four parameters(temperaturd,sliding speed,applied loading,the atmosphere)on friction and wear of quasicrystal surface are studied.In addition,the surface microstructure and the morphology have been observed by scanning electron microscopy(SEM)and X-ray diffraction.The results show that,with rise of the applied load and sliding speed,the friction coefficient decreases.The friction coefficient is influenced greatly by the temperature and icreased evidently by the rise of temperature,Delamination theory of wear mechanism at 350℃ is different from other condition at room temperature.Analyses of the surface morphology illustrates that the microcrackes form to different extent in all worn quasicrystal surface.All discussion and analyses on the results of experiment are presented in detail.