This study aims to investigate tribological properties in a siliconized graphite (CΓ-Π-0.5) and hierarchically hybrid SiC/C composites at the load ranging from 10-40 N under dry air/water lubrication conditions.A feasible liquid silicon infiltration (LSI) was used to fabricate the SiC/C composites.Morphology and phase identification of two materials were characterized and analyzed by scanning electron microscope (SEM) and energy dispersive spectrometer (EDS).An image feature extraction was used to post-process the data of wear test,further to gain the wear properties of the samples.The results demonstrated that a lower coefficient of friction (COF) and wear rate can be achieved in the LSI SiC composites than that in the sample of CΓ-Π-0.5.Both COF decreased under water-lubricated conditions,compared with that under the dry air lubrication.The excellent tribological properties in two materials can be due mainly to the microstructure of the CΓ-Π-0.5 sample,showing much more graphite and Si dispersed on the matrix.The CΓ-Π-0.5 sample indicated the typical oxidative wear mechanism,whereas,the sample of LSI SiC demonstrated the combined oxidative and fatigue wear.This finding can provide a promising new siliconized graphite materials for ceramic rolling bearings.