Investigation on Performance, Emission and Failure Analysis of Piston using Thermal Barrier Coatings: A Review
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Abstract
The primary purpose of the thermal barrier coating (TBC) is to shield the metallic components above 1000 degC. Also, it can reduce emissions, improve efficiency, mitigate damage and abrasion in internal combustion engines. To evaluate and improve the durability and reliability of TBC, it is important to understand the fundamental degradation and failure mechanisms of TBC. To create a low heat rejection engine, the TBCs have been sprayed on top of the piston. TBC develops a complication in the morphology and the uneven cooling leads to pores and microcracks in the coating. Oxidation occurs, when TBCs are exposed to high temperatures. Various failure mechanisms of TBCs are analyzed due to oxidation, hot corrosion, phase transitions, residual stresses and sintering effect. Few strategies are outlined in order to mitigate the negative consequences as above and to increase the life span of TBCs.
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