WEAR RESISTANCE OF NANOCOMPOSITE COATINGS WITH DRY LUBRICANT UNDER VACUUM

• Published in: Natsional'nyi Hirnychyi Universytet. Naukovyi Visnyk no. 1; p. 47
• Main Authors: Babak, V P, Shchepetov, V V, Nedaiborshch, S D
• Format: Journal Article
• Language: English
• Published: Dnipropetrosk State Higher Educational Institution "National Mining University" 01.01.2016
• Subjects: Chromium; Coatings; Drying; Lubricants; Nanocomposites; Nanostructure; Protective coatings; Wear resistance
• ISSN: 2071-2227; 2223-2362

To research tribotechnical characterization of the developed Cr-Si-B detonation nanocomposite coatings containing dry lubricant additives involving the dispersed molybdenum disulfide as an extra anti-friction component under vacuum conditions. The tribotechnical characteristics of the composite coatings studied have been analyzed and compared with the values of VK15 coating wear resistance and the surface layers produced from a thermodiffusion alloying with boron, vanadium and chromium. The up-to-date physical techniques including X-ray spectral microanalysis and scanning electron microscopy have been applied to investigate rubbing surfaces. By mechanochemical synthesis of starting materials, the nanocomposite powders composed of nanocomposite homogeneous mixture have been obtained. Controlling the operation procedure of producing nanocomposites, the authors succeeded in providing the desired chemistry. Moreover, the intended coating nanostructure with high resistance to wear under friction loading in vacuum has been obtained while spraying. The effect of a coating structure and surface film composition on their operational characteristics has been found.