Physicomechanical Properties of Coatings Based on Max Ti2AlC and (Ti, Nb)2AlC Phases at 20°C and 500°C

• Published in: Materials science (New York, N.Y.) N.Y.), 2023-07, Vol.59 (1), p.10-17
• Main Authors: Podhurska, V. Ya, Kuprin, O. S., Chepil, R. V., Ostash, O. P., Prikhna, T. O., Sverdun, V. B., Bortnytska, M. O.
• Format: Article
• Language: English
• Subjects: Arc deposition; Bearing steels; Characterization and Evaluation of Materials; Chemistry and Materials Science; Coatings; Coefficient of friction; Fatigue failure; Fatigue strength; Fretting; Materials Science; Metal fatigue; Microhardness; Niobium; Solid Mechanics; Structural Materials; Tribology; Wear rate; Wear resistance
• ISSN: 1068-820X; 1573-885X
• DOI: 10.1007/s11003-023-00737-8

Physicomechanical characteristics of 15Kh16k5N2MVFAB-Sh steel (0.15C–16Cr–5Co–2Ni–0.7V–0.6Mo–0.3Nb–0.4N): wear resistance at 20°C and 500°C and resistance to fretting fatigue at 20°C without and with coatings obtained by the method of vacuum-arc deposition using targets based on the MAX phases of Ti 2 AlC and ( Ti 1 - x Nb x ) 2 AlC , where x = 0.1 and 0.2, are investigated. At 20°C the friction coefficient and the wear specific rate of all coatings are greater than that of the studied steel in contact with a ShKh15 steel (1.0C–1.5Cr–0.3Ni–0.3Mn–0.3Si–0.25Cu) ball under a load of 2 N. Unambiguous relationship between microhardness and tribological characteristics of materials has not been recorded. The resistance to fretting fatigue of the samples with Ti 2 AlC -based coating in contact with the Ni-alloy (17Cr–12W–11Fe–6Co–3Ti–1.5Nb–1.6Al) in high-cycle region ( N > 10 5 cycles) is significantly higher than that of uncoated samples. The tribological characteristics of all materials decrease at 500°C but the least for samples with Ti 2 AlC based coating. We have not found positive influence of niobium doping on the wear and fretting fatigue resistance of these coatings.