Centre de projecció térmica

Self-lubricated Coatings obtained by Atmospheric Plasma Spraying (APS), as a liquid lubricants alternative

J.M. Guilemany, J. Fernandez, J. Navarro, J.M.Miguel

Bol. Soc. Española de Ceramica y Vidrio, 44 (3), (2005)

The low friction coefficient coatings are a new approach to substitution of oil lubricated systems. The introduction of a solid lubricant in a matrix with good mechanical properties gives to the system a low friction coefficient and improves the wear resistance of the coating. These new systems can be used at high temperature where liquid lubricants fail.

Ni-Graphite and Cr₂O₃-CaF₂ self lubricated coatings have been produced by Atmospheric Plasma Spray (APS), in the Thermal Spray Centre of University of Barcelona. The effect of graphite and CaF₂, on the metallic matrix and coatings properties has been studied. It was observed that the wear was low in both systems, but the friction coefficients are very different. The results show that the Ni-graphite coatings has an good behaviour and can be used as alternative to liquids lubricanmts.

Keywords: Self- lubircated, Solid lubricants, Coatings, Ni-Graphite, Cr₂O₃-CaF₂, Thermal Spary, Atmospheric Thermal Spray, High temperature lubricants