Interpretation of friction and wear of ceramics in terms of surface analysis

摘要: Abstract Selected combinations of ceramic tribomaterials (SiC-SiC, Si 3 N 4 -Si , h-BN-h-BN) were tested in an Auger electron spectroscopy (AES) and X-ray photoelectron (XPS) analytical tribotester, under ultrahigh vacuum, partial pressures gases (O 2 ,N ,H O, C H 8 air) respectively. The main purpose the work was to clarify correlations existing between composition microstructure friction-induced interface films reduction friction wear ceramics caused by ambient gases. In addition conventional AES, XPS secondary ion mass spectrometry analyses, microscopy (both transmission STEM), energy loss spectroscopy, extended fine structures used characterize tribochemical reactions on surfaces. Under surfaces exhibit high ( f k >0.7) which is associated with disorder material. Adsorbed did not “lubricate” these interfaces. Reactive ) formed contact region provided lubrication lower friction. This observed selected, carbon-containing systems formation sp -hybridized carbon films. wide range physical chemical phenomena for sliding contacts implications their use severe environments discussed.