Abstract
In this paper, the preparation and organization performance of thermal barrier coatings (TCBs) on the surface of titanium were studied experimentally. Nanostructured 8 wt% yttria partially stabilized zirconia coatings were deposited by air plasma spraying. The microstructure of nanostructured and the conventional coating was studied after laser remelting. It has shown that formed a network of micro-cracks and pits after laser remelting on nanostructured coatings. With the decrease of the laser scanning speed, mesh distribution of micro cracks was gradually thinning on nanostructured coatings. Compared with conventional ceramic layers, the mesh cracks of nanostructured coating is dense and the crack width is small.
Highlights
Titanium is an important structural materials and functional materials, is the most widely used material on the engine [1]
Due to rapid cooling, which forming of quenching molten particles to thermal stress, causing micro cracks in generating plasma spraying process
The surface morphology of nanostructured coatings was shown in figure 2
Summary
Titanium is an important structural materials and functional materials, is the most widely used material on the engine [1]. Titanium has a low density, high strength, wide operating temperature range and excellent corrosion resistance and other characteristics. Thermal barrier coating is an advanced high-temperature protective coating. It has a wide range of research and application background in the aerospace [3]. The preparation of thermal barrier coatings on titanium alloy surface can make parts lighter, and can be effectively insulated thermal barrier coatings and antioxidant protection. Plasma spraying powder quality directly affects the coating performance. The quality of powders of is a very important factor for plasma sprayed nanostructured Coating. As to realize the material surface modification in high thermal barrier coating performance, laser surface remelting composite coating technology has caused the attention of researchers
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