Gas-deposition mechanisms of 7YSZ coating based on plasma spray-physical vapor deposition

Zhang, X.F.; Zhou, Kesong; Deng, Chunming; Liu, M.; Deng, Zongquan; Song, Jinbing

doi:10.1016/j.jeurceramsoc.2015.10.041

Cited by 75 publications

(26 citation statements)

References 19 publications

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“…Some VLPPS processes may be further complicated with chemical precursor feedstocks that react or pyrolize within the plasma (Ref 44,45,53). The number of institutes and universities having access to this technology has been increasing, raising the number of studies (Ref 37,55,57,58).…”

Section: Currentmentioning

confidence: 99%

“…Thus, very different types of microstructures can be obtained ranging from thin and dense coatings (Ref 54) to mixed mode deposits (Ref 55) and to columnar-structured (EB-PVD-like) coatings (Ref 56). Besides feedstock characteristics and plasma parameters, the spray distance, substrate temperature and substrate material have significant impact on coating formation mechanisms (Ref 57,58). In particular, in PS-PVD where large feedstock fractions are evaporated, also the gas flow around the substrate and the formation of a boundary layer are obviously important as even non-lineof-sight deposition is observed.…”

Section: Currentmentioning

confidence: 99%

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The 2016 Thermal Spray Roadmap

et al. 2016

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Considerable progress has been made over the last decades in thermal spray technologies, practices and applications. However, like other technologies, they have to continuously evolve to meet new problems and market requirements. This article aims to identify the current challenges limiting the evolution of these technologies and to propose research directions and priorities to meet these challenges. It was prepared on the basis of a collection of short articles written by experts in thermal spray who were asked to present a snapshot of the current state of their specific field, give their views on current challenges faced by the field and provide some guidance as to the R&D required to meet these challenges. The article is divided in three sections that deal with the emerging thermal spray processes, coating properties and function, and biomedical, electronic, aerospace and energy generation applications.

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Section: Currentmentioning

confidence: 99%

Section: Currentmentioning

confidence: 99%

The 2016 Thermal Spray Roadmap

et al. 2016

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“…And sub-micron/micron grains were obtained from semi-molten and splashed particles. Environmental Barrier Coating)是一种有效的解决途径 [5] 。经过 30 多年的摸索与发展, EBC 涂层大致经历了三个阶段 [1,2,[4][5][6] ：第一代, 莫来石与氧化钇稳定关, 如表达式(1)所示 [14] : [16] 。此外, 在涂层表面还存在较多的纳米颗粒, 如图 6(c)所示, 这些纳米颗粒由喷涂粉末蒸发后气相冷凝而成 [17] 。 EBC 涂层的沉积过程可用图 7 进一步说明, 团聚的粉末由于颗粒间结合力较大, 当粉末注入等离子喷枪中相互碰撞, 部分粉末粒子从原团聚粉末中分离, 其中经过焰流中心的颗粒则在高温等离子作用下表面直接由固态气化, 而这些气相在等离子焰流温度变化过程中发生均匀形核, 或在基体表面发生非均匀形核, 最终在涂层中形成纳米晶粒 [18] 。原始喷涂粉末表面气化后的粒子由于粒径较小, 其塑…”

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Preparation of Si/Mullite/Yb₂SiO₅ Environment Barrier Coating (EBC) by Plasma Spray-Physical Vapor Deposition (PS-PVD)

Zhang¹,

Zhou²,

Liu³

et al. 2018

Journal of Inorganic Materials

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Environmental barrier coating (EBC) Si/3Al 2 O 3-2SiO 2 /Yb 2 SiO 5 was prepared by plasma spray-physical vapor deposition (PS-PVD) on SiC/SiC ceramic matrix composites. The surface and interface of tri-layered EBC were characterized by SEM. And the phase transformation of the mullite coating was analyzed by XRD. The interaction of feedstock powder and high temperature plasma jet was investigated. Furthermore, the deposition mechanism of EBC was studied. Experimental results dermonstrated that EBC with low porosity and good bonding can be obtained by PS-PVD. EBC withont micro-crack was observed on the surface of Si coating in contrast to coating mullite and Yb 2 SiO 5 coating. The size of crack in mullite surface was larger than that in Yb 2 SiO 5 coating. Low porous EBC was deposited by liquid droplet accompanied by gas and solid state through PS-PVD. Yb 2 SiO 5 coating was dense and formed laminar structure, mainly resulting from liquid droplet deposition. Additionally, nano-grains were observed in Yb 2 SiO 5 coating which resulted from both homogeneous and heterogeneous nucleation of vapor

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“…In the spraying process, the feedstock is heated by a plasma jet at a temperature of up to 15,000 K and then melted into a droplet or semi-molten particle, which impacts the substrate at a velocity of up to 800 m/s. Molten droplets or semi-molten particles deform and spread on the substrate due to the kinetic energy impact, accumulating on the substrate and solidifying rapidly into a stacking structure [30,31]. From the analysis by EDS, it can be determined that the black phase in SEM imaging is MgAl 2 O 4 .…”

Section: Performance Characterization Of Coatingsmentioning

confidence: 99%

Property of TiO2-15MgAl2O4 Electrical-Heating Coating Prepared by Atmospheric Plasma Spraying and Hydrogen Heat Treatment

Yang

Wang

et al. 2020

Coatings

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Using TiO 2 -15MgAl 2 O 4 mixed powder as spray-feed, an electrical-heating coating was successfully fabricated by atmospheric plasma spraying technology. The phase composition, microstructure, and electrical-heating performance of the coating were characterized by XRD, SEM, and cyclic electrification tests, respectively. The coating samples were heat-treated at 350 • C in a hydrogen atmosphere. The results show that TiO 2 -15MgAl 2 O 4 coating can be heated over 300 • C within 30 m at 55.1 V which preserves heat for a long time. Before heat treatment, the available heating temperature of the coating decreases significantly with electrification cycles. The resistivity of coating rises rapidly during the cyclic electricity test. After hydrogen heat treatment, the electrical-heating property of coatings is significantly enhanced.

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Gas-deposition mechanisms of 7YSZ coating based on plasma spray-physical vapor deposition

Cited by 75 publications

References 19 publications

The 2016 Thermal Spray Roadmap

The 2016 Thermal Spray Roadmap

Preparation of Si/Mullite/Yb₂SiO₅ Environment Barrier Coating (EBC) by Plasma Spray-Physical Vapor Deposition (PS-PVD)

Property of TiO2-15MgAl2O4 Electrical-Heating Coating Prepared by Atmospheric Plasma Spraying and Hydrogen Heat Treatment

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Gas-deposition mechanisms of 7YSZ coating based on plasma spray-physical vapor deposition

Cited by 75 publications

References 19 publications

The 2016 Thermal Spray Roadmap

The 2016 Thermal Spray Roadmap

Preparation of Si/Mullite/Yb2SiO5 Environment Barrier Coating (EBC) by Plasma Spray-Physical Vapor Deposition (PS-PVD)

Property of TiO2-15MgAl2O4 Electrical-Heating Coating Prepared by Atmospheric Plasma Spraying and Hydrogen Heat Treatment

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Preparation of Si/Mullite/Yb₂SiO₅ Environment Barrier Coating (EBC) by Plasma Spray-Physical Vapor Deposition (PS-PVD)