Tribological Properties of TiN/Ag Nanocomposite Coatings
- 413 Downloads
Morphology, structure, and tribological behavior of magnetron co-sputtered TiN/Ag nanocomposite coatings deposited at 150 °C with an Ag content in the range of 7–45 at.% were characterized. The coatings show a columnar structure with embedded Ag crystallites of 3–50 nm in diameter, where the columns are characterized by a layered structure with Ag-poor and Ag-rich layers. These layers originate from sample rotation during deposition, where the layer thickness increases with increasing Ag content. These Ag layers become continuous over a critical Ag content. At room temperature the friction coefficient is determined by the film structure, whereas friction and wear at high temperature depend on segregation of Ag to the surface.
KeywordsNitrides Silver Self lubricating composites Wear-resistant coatings
This work was financially supported by the Austrian NANO Initiative via a grant from the Austrian Science Fund FWF (project N401-NAN). The authors would like to thank Prof. C. Teichert, Dr. G. Hlawacek, and T. Klünsner for their support with AFM measurements.
- 23.Köstenbauer, H., Fontalvo, G.A., Mitterer, C., Hlawacek, G., Teichert, C., Keckes, J.: Structure, stresses and stress relaxation of TiN/Ag nanocomposite films. J. Nanosci. Nanotechnol. (accepted)Google Scholar
- 25.Warren, B.E.: X-ray Diffraction. Dover Publications, New York (1990)Google Scholar