Development of Marinized Protective Coatings for Higher Temperature Operations of Marine Gas Turbine Engines Navy SBIR FY2015.1 Sol No.: Navy SBIR FY2015.1 Topic No.: N151-070 Topic Title: Development of Marinized Protective Coatings for Higher Temperature Operations of Marine Gas Turbine Engines Proposal No.: N151-070-0920 Firm: Directed Vapor Technologies International, Inc. 2 Boars Head Lane Charlottesville, Virginia 22903 Contact: Derek Hass Phone: (434) 977-1405 Web Site: www.directedvapor.com Abstract: The marine environment is extremely corrosive to turbine engine components due to salt exposures from the sea, the presence of fuel impurities and the high temperatures experienced. To cope with future operational requirements, a strong need exists to develop novel, protective coatings to provide environmental protection from hot corrosion and oxidation conditions across a wide range of operating temperatures. To address this issue, this program will employ novel compositions and advanced processing methods to apply corrosion-resistant coatings onto marine turbine engine components such as blades and vanes. Integrated Computational Materials and Engineering (ICME) techniques will be used to aid compositional development by assessing the compatibility of the coating(s) with substrate alloys in terms of the activity matching of key components and determining the thermodynamics of multi-salt sulfate deposits to assess their liquidus temperature and stability with alumina and/or chromia scales. DVTI will use its production scale coater to apply the selected coatings onto test samples to demonstrate the desired composition, microstructure and non-line-of-sight coating deposition capability. Samples will then be tested for their resistance to Type I and II hot corrosion and oxidation degradation under dual-cycle conditions intended to duplicate the hot corrosion and oxidation damage found in practice. Benefits: Application of novel coating compositions with a high quality deposition method onto line-of-sight and NLOS regions of components will allow higher operational temperatures, longer engine lifetimes, and a larger number of component thermal cycles. This improvement in performance is due to the application of novel coating compositions which are able to resist the three different degradation mechanisms expected in operation. NLOS processing allows the coating of more complex components such as below the blade platform or the interior of the fur-tree structure in the turbine disk to be coated to better resist attack. Improvement of the resistance of turbine engine components to the degradation mechanisms will also allow for greater operational flexibility and reduced maintenance. The ability to protect against oxidation conditions will lead to the ability to run the engines to higher temperatures, which would improve fuel efficiency. Equally important is providing protection against Type I (mid-range temperatures) and Type II hot corrosion (low temperature), which allows frequent cycling between low and high power modes of the engine as desired for increased flexibility of the Navy assets. These advantages will lead to increased engine capability and reduced cost of total ownership. Civilian transportation and power generation sectors will be aided as well as air and sea based military vehicles. Return