Thermal Barrier Coating on IC Engine

As per the second law of thermodynamics the efficiency of the engine depends upon the extraction of work against the heat supplied Minimization of heat rejection leads to increase the work. Heat rejection takes place through the engine piston, valves and cylinder heads to the surroundings. The aim of the study is to minimize this heat rejection to the surroundings. Heat transfer through the engine parts is minimized by applying the thermal barrier coating materials on the top surface of the engine piston, cylinder head sand valves. In this study an attempt is made to reduce the intensity of thermal and structural stresses by using a layer of the ceramic material, like Yttrium stabilized zirconia (YSZ) which has low thermal conductivity, high thermal resistance, chemical inertness, high resistance to erosion, corrosion and high strength was selected as a coating material for engine component. This study present the effect of coating on the piston and the performance of modified four stroke petrol engine and the emission characteristics of the exhaust gas.