Abrasive resistant self-lubricating forsterite-based coatings

The obtained compounds of complex magnesium orthosilicate oxides were used as the basis of self-lubricating composite coatings. The structural and phase composition of the coatings is established. It is shown that an effective self-lubricating composite coating contains structurally free magnesium carbide. The technology for obtaining a composite powder mixture for spraying is developed, the tribotechnical and operational properties are optimized, and rational parameters for detonation-gas spraying of forsterite-based coatings are established. The physical mechanism is determined and the main factors determining the level of thermodynamic graphitization are clarified. The character and regularities which determine the tendency of coatings to passivation are studied.