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.

柴油车辆的汽缸内部的隔热涂层（TBC）材料用于提高可靠性，耐用性，发动机效率以及发动机中金属部件的热零件的性能。因此，随着对柴油发动机TBC的研究日益增加，气缸内的隔离涂层材料的新的热研究正在进行中。因此，在这项研究中，使用HVOF方法将Cr ₃ C ₂ –25（NiCr），WC–10Co–4Cr和WC–12Co粉末涂覆在柴油发动机表面的活塞（AlSi12CuNi）上。拍摄涂层的SEM图像，并进行EDS和XRD分析。另外，还进行了材料的耐粘附性，显微硬度和表面粗糙度的测量。在XRD研究中，在Cr ₃ C _2中发现了–25（NiCr）涂层，Cr ₃ C ₂和Cr ₇ C ₃复合材料，并且在WC–10Co–4Cr和WC–12Co涂层中，发现了WC，W ₂ C和Co ₃ W ₃ C复合材料。在涂有WC-12Co粉末的样品上，检测到最佳的附着力，最大硬度值和最小粗糙度值。