Abstract
A multilayer Intermetallic Thermal Barrier Coating has been developed at the University of Windsor using a Cold Spray method. The coating is composed of layers of SHS717 stainless steel (Fe, Cr, Mo, W, C, Mn, Si & B) and layers of aluminum acting as bond coats. The coating properties match the thermophysical properties of metallic engine components. In this study, initial testing of the intermetallic TBC was conducted on the crown of aluminum pistons tested in a small indirect-injection diesel engine operating at full load and various engine RPMs. Indicated and brake performance metrics were analyzed to determine changes in engine performance characteristics when compared to baseline uncoated engine operation. An apparent heat release analysis was completed to determine the change of heat rejection of the engine operating with the TBCs, as well as an energy balance analysis to determine the improvements in the fuel energy conversion. The results from this analysis indicated that indeed the heat transfer losses were reduced with a concurrent modest gain in engine output.
Publisher
Polish Scientific Society of Combustion Engines
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