Official websites use. Share sensitive information only on official, secure websites. Correspondence: norbert. Investigations of the physical, chemical, and mechanical properties were performed on the as-sprayed, heat-treated, and oxidized samples. The oxidation behavior, microhardness, cohesion, and adhesion of the samples were correlated with the microstructural investigations and compared to the conventional TBC system.
It could be shown that heat treating decreased the Cr-Cr x O y coatings crack susceptibility and led to the formation of a protective thermally grown Cr oxide layer. The experimental work on the YSZ-CoNiCrAlY system revealed that the phase composition of the bond coat has a direct influence on the oxidation protection of the coating system.
Keywords: thermal barrier coatings, oxidation performance, microhardness Cr coatings, atmospheric plasma spraying, yttria stabilized zirconia. Gas turbines are commonly known as stationary or flying power engines in the energy or aviation industry [ 1 ]. These energy conversion engines differ from each other in size and in type of energy use, but the functional principle remains the same for both.
The components inside of a gas turbine are subjected to temperature changes during revisions or flight operations. Working temperatures, mechanical forces, pressures, and environmental conditions are factors that must be considered for the construction and use of such equipment [ 2 ]. Therefore, a safe and reliable operation with the longest possible service life remains a major technical challenge for the industry.
The greatest possible economic benefit for manufacturers and operators can only be achieved through high performance. However, an application-optimized design with only metallic materials does not meet the requirement of a long service time any longer. For this reason, thermal barrier coatings TBC systems for the combustion chambers and for the blade surfaces have been continuously developed since the s [ 4 ]. In operation, TBCs are subjected to temperature fluctuations that cause mechanical stresses.
