TRIBOLOGY AT HIGH-TEMPERATURES

The paper reviews publications, primarily of the Institute of Machiner y Science of the Russian Academy of Sciences. The techniques of invest igations and the results are briefly outlined as to how various high-m elting point materials withstand friction in vacuum and in gaseous atm ospheres (within a wide temperature range) in like or unlike combinati ons, such as metals, metal-like compounds, oxides, graphite materials- and molybdenum disulphide. The results of measurements of adhesion, in cluding that between diamond and various metals, are given. The fricti on drop of graphite material on corundum ceramics caused abnormally by tribochemical interaction, is described. The 'eutectic wear' accompan ied by a sharp friction reduction is based on an investigation of the phenomenon of eutectic melting of diamond and graphite with experiment al validation. The results of studies of vacuum ion-plasma deposited C r-O and MoS2 coatings are demonstrated and a technique is suggested as to how to make the friction of MoS2 very low.