About the article
A.N. BOLOTOV, V.V. NOVIKOV, O.O. NOVIKOVA
Tribotechnical characteristics of an innovative material representing a composite coating with a matrix of aluminium oxide and fillers of nanodispersed magnetite and microdispersed molybdenum disulphide and graphite have been studied. It is established that the minimum values of friction coefficient and wear intensity while maintaining high strength properties of materials are achieved at the concentration of dispersed particles in the electrolyte: for magnetite – not more than 20 g/l; graphite – not more than 40 g/l; molybdenum disulphide – 45 g/l. It is emphasised that the tests showed the stability of the friction coefficient of the investigated coatings during 90 hours. The influence of contact pressure on the intensity of linear wear has been studied. The criterion of transition from elastic contact to plastic contact is proposed. On the basis of it the calculation relation for estimation of transition from stable operation of tribo-conjugation to its catastrophic wear is received.
microarc oxidation, antifriction fillers, ceramic coating, friction, wear.