The Effect of Temperature on the Friction of a Carbon–Carbon Composite in Carbon Dioxide

The antifriction properties have been determined experimentally for a carbon–carbon composite in the course of sliding friction against 40Kh13 steel in an environment of carbon dioxide. Changes in the friction coefficient upon heating to 800°C have been investigated in the velocity ranges from 0.05 to 0.25 m/s at a contact pressure ranging within 0.5–1 MPa. The novelty of the investigation consists in determining the tribotechnical properties of a little-studied friction pair that is promising for use in aerospace technology. Particular attention is paid to the tribotechnical properties of the friction pair at 500°C. Based on the studies, the friction coefficient is recommended for the design of plain bearings and hinges for spacecraft intended for operation in the atmosphere of Venus.