7YSZ coating prepared by PS-PVD based on heterogeneous nucleation
| Autor: | Jie Mao, Chun-Ming Deng, Ziqian Deng, Min Liu, Kesong Zhou, Xiaofeng Zhang, Chen Zhikun |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Aerospace Engineering Nanotechnology TL1-4050 02 engineering and technology engineering.material Combustion chemical vapor deposition 021001 nanoscience & nanotechnology 01 natural sciences Electron beam physical vapor deposition Pulsed laser deposition Thermal barrier coating Coating Chemical engineering Physical vapor deposition 0103 physical sciences engineering Deposition (phase transition) Thin film 0210 nano-technology Motor vehicles. Aeronautics. Astronautics |
| Zdroj: | Chinese Journal of Aeronautics, Vol 31, Iss 4, Pp 820-825 (2018) |
| ISSN: | 1000-9361 |
| Popis: | Plasma spray-physical vapor deposition (PS-PVD) as a novel coating process based on low-pressure plasma spray (LPPS) has been significantly used for thermal barrier coatings (TBCs). A coating can be deposited from liquid splats, nano-sized clusters, and the vapor phase forming different structured coatings, which shows obvious advantages in contrast to conventional technologies like atmospheric plasma spray (APS) and electron beam-physical vapor deposition (EB-PVD). In addition, it can be used to produce thin, dense, and porous ceramic coatings for special applications because of its special characteristics, such as high power, very low pressure, etc. These provide new opportunities to obtain different advanced microstructures, thus to meet the growing requirements of modern functional coatings. In this work, focusing on exploiting the potential of gas-phase deposition from PS-PVD, a series of 7YSZ coating experiments with various process conditions was performed in order to better understand the deposition process in PS-PVD, where coatings were deposited on different substrates including graphite and zirconia. Meanwhile, various substrate temperatures were investigated for the same substrate. As a result, a deposition mechanism of heterogeneous nucleation has been presented showing that surface energy is an important influencing factor for coating structures. Besides, undercooling of the interface between substrate and vapor phase plays an important role in coating structures. Keywords: 7YSZ, Deposition mechanism, Heterogeneous nucleation, PS-PVD, TBC |
| Databáze: | OpenAIRE |
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