Abstract

Thermal barrier coating (TBC) materials inside the cylinder in diesel vehicles are used to increase the reliability, durability, engine efficiency and performance of the hot parts of metal components in the engine. For this reason, as the researches on TBC in diesel engines increase day by day, new thermal researches of barrier coating material inside cylinders are proceeding. Therefore, in this study, Cr3C2–25(NiCr), WC–10Co–4Cr and WC–12Co powders were coated on a piston of a diesel engine surface (AlSi12CuNi) by using HVOF method. The SEM images of coating layers were taken, and EDS and XRD analyses were done. Additionally, adhesion resistance, microhardness and surface roughness measurements of materials were done. In XRD studies, in Cr3C2–25(NiCr) coating layers, Cr3C2 and Cr7C3 composites, and in WC–10Co–4Cr and WC–12Co coating layers, WC, W2C and Co3W3C composites were found. The best adhesion resistance, maximum hardness value and minimum roughness value were detected on the samples that were coated with WC–12Co powder.

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