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首页> 外文期刊>DVS-Berichte >Spraying process, microstructure, and relaxation stress behavior of cylindrical standalone YSZ coatings with and without segmentation
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Spraying process, microstructure, and relaxation stress behavior of cylindrical standalone YSZ coatings with and without segmentation

机译：带和不带分段的圆柱型独立YSZ涂层的喷涂工艺，微观结构和松弛应力行为

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摘要

Segmentation cracked coatings are promising candidates for thermal barrier coatings (TBC) because of their high strain tolerances. By atmospheric plasma spraying (APS), cylindrical stand-alone YSZ coatings with and without segmentation cracks were fabricated. The diameter of the tubes was 10 mm, and the thickness of the coatings approximately 1 mm. The segmentation crack densities were in the range up to 3.5 cracks/mm, while the porosity amounted for all coatings between 5% and 7%. Further details of the spraying process and the obtained microstructures will be given and discussed. The samples were tested in an uniaxial high temperature compression rig to measure the stress relaxation. The comparison of the stress relaxation measurements yielded a different performance of segmented and non-segmented coatings with advantages for the cracked ones. It was observed that the cracks increase the resistance to stress relaxation.
机译：分段开裂的涂层由于其高的应变耐受性而成为热障涂层（TBC）的有希望的候选者。通过常压等离子体喷涂（APS），制造了具有和不具有分段裂纹的圆柱形独立YSZ涂层。管的直径为10mm，涂层的厚度约为1mm。分段裂纹密度最高为3.5裂纹/毫米，而所有涂层的孔隙率在5％至7％之间。将给出和讨论喷涂过程和获得的微结构的更多细节。样品在单轴高温压缩装置中测试以测量应力松弛。应力松弛测量值的比较产生了分段和非分段涂层的不同性能，对破裂涂层具有优势。观察到裂纹增加了抗应力松弛的能力。

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