High temperature friction and wear behavior of MoS2/Nb coating in ambient air

Abstract

MoS 2 coatings are well-known for their solid lubricant properties and used as self-lubricants in vacuum and inert gas environments, and such coatings are not used in atmospheric conditions because of their deteriorating tribology. The tribological performance of MoS 2 solid lubricant coatings in the different atmospheres has been improved by the codeposition of a small amount of another metal. In this study, the tribological behavior of MoS 2 /Nb coatings was investigated in ambient air at temperatures up to 500°C by using high-temperature pin-ondisc tribo testers and alumina balls as counterfaces. MoS 2 /Nb coatings were deposited on silicon wafers and AISI 52100 steel substrate by closed-field unbalanced magnetron sputtering. The structural analyses of the coatings were performed using X-ray diffraction and scanning electron microscopy techniques. The hardness was measured using a microhardness tester.

Dual-Phase Nanocomposite TiB2/MoS1.7B0.3: An Excellent Ultralow Friction and Ultralow Wear Self-Lubricating Material

“…This superb combination of concurrent ultralow friction coefficient and wear rate makes DPNC TiB 2 /MoS 1.7 B 0.3 an outstanding USL material. In Figure c, we show a wear rate versus friction-coefficient plot for the recently reported self-lubricating materials based on MoS 2 , including MoS 2 -metals (Au, Ti, Pb, Cr, Zr, W, Nb), MoS 2 -nonmetals (C, N, B, Si, GLC, a-C:H), and MoS 2 -others (PTFE, Pb/Ti, CrMoN, Ag/C, Sb 2 O 3 /Au); for comparison, MoS 2 , TiB 2 , TiN, and several other typical wear-resistant materials ,− are also included. All of the data shown here are obtained in the self-lubricating mode, i.e., without any external input, and measured in ambient air.…”

High-temperature tribological behavior of ZrO2–MoS2–CaF2 self-lubricating composites

“…[12][13][14][15] The results showed that MoS 2 can work well at low temperatures, especially in vacuums, but it can be easily oxidized at high temperatures. The authors' previous experiments show that Mo will react with CaF 2 at high temperatures and forming CaMoO 4 on the worn surface.…”

Tribological performances of graphite–MoS2 coating at various high temperatures

“…Arslan et al. 22 examined the friction and wear performances of the MoS 2 –Nb coating on the AISI 52100 steel. Their results demonstrated that both the COF and wear rate are lowest at 100 ℃, and the coating is intensively oxidized at 300–500 ℃.…”

“…The nanoindentation test by Stoyanov et al 21 showed that the Au-MoS 2 coating possesses higher hardness, lower surface adhesion, and stronger wear resistance in comparison with the pure Au film. Arslan et al 22 examined the friction and wear performances of the MoS 2 -Nb coating on the AISI 52100 steel. Their results demonstrated that both the COF and wear rate are lowest at 100 C, and the coating is intensively oxidized at 300-500 C. Li et al 23 verified that the elastic modulus and hardness of the MoS 2 -Pb nanocomposite coating increase with the Pb content and the anti-oxidant property is the determinant of the coating's wear resistance in the humid environment.…”