Tribological properties, phase generation and high temperature phase stability of tungsten- and vanadium-oxides deposited by reactive MSIP-PVD process for innovative lubrication applications

摘要: Abstract The tungsten and vanadium oxides are promising to be usable as solid lubricants at elevated temperatures because of their ability form oxygen deficient Magneli-phases. As a matter fact, metal-oxides interesting for tribological insets atmospheric conditions expected oxidation stability low adhesion. study reports about the deposition in reactive d.c. mode by MSIP- (Magnetron Sputtering Ion Plating) PVD process especially influence content sputtering atmosphere well temperature on phase generation. A simplified ‘sputtering diagram’ binary systems V–O W–O function (378–650 K) (0–50%) was determined. Furthermore, it shown that tested vanadium-oxides stable up 878 K tungsten-oxides 1100 (measured high-temperature XRD facility). Additionally properties deposited oxide coatings, like friction coefficient vs. steel, will presented. For polished WOx coated samples μ≈0.2 against steel measured room temperature. coatings were analyzed various testing methods characterize tribological, mechanical structural properties, SEM, nanoindentation, (high-temperature)-XRD pin-on-disk.