Self-Lubricating Surfaces by Ion Beam Processing

摘要

The primary research objective of this work was to develop self-lubricatingsurface and coatings through direct ion implantations and a combined process of electron beam evaporation and ion implantation. The latter is most commonly referred in the literature as ion beam assisted deposition (IBAD). IBAD of bi-layer coating of (Calcium Fluoride/Silver) on (Silicon nitride) resulted in a very adherent coating that exhibited significantly low friction and wear characteristic at both room and elevated temperatures (800 deg C). Ion beam assisted titanium dioxide coating on M50 steel showed significantly improved friction and wear characteristics at room temperature. Ion beam assisted Cadmium Oxide coating lowered the friction coefficient of M50 steel 400C. The ion beam assisted deposition technique for fabricating self-lubricating surfaces appears to have good technical feasibility for defense and industrial applications, owing to the overall simplicity and scalability of the technique. The initial applications are likely to be in the seals and bearings of engines, variable stator vanes, etc., in gas turbine engine technology. Ion implantation, Ion beam assisted deposition, Self-lubrication, Coating, Thin film, Si3N4, M50 steel, Friction and wear, Materials, Vapor deposition. (JG)