Robust Hydrophobic Surfaces from Suspension HVOF Thermal Sprayed Rare-Earth Oxide Ceramics Coatings.
Robust Hydrophobic Surfaces from Suspension HVOF Thermal Sprayed Rare-Earth Oxide Ceramics Coatings.
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DOI：
10.1038/s41598-018-25375-y
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发表时间：
2018-05-03
影响因子：
4.6
通讯作者：
Hussain T
中科院分区：
文献类型：
--
作者：
Bai M;Kazi H;Zhang X;Liu J;Hussain T
本研究提出了一种高效的涂层方法，即悬浮高速氧燃料（SHVOF）热喷涂，以制备具有独特微纳米级分层结构的大型超疏水陶瓷表面，以模拟天然超疏水表面。CeO2作为涂层材料，是最近发现的稀土氧化物（REO）陶瓷中的一种，即使在高温和磨料磨损下也表现出固有的疏水性。采用固体浓度为30 wt.%的亚微米CeO2颗粒（50-200 nm）的水悬浮液，在选定的金属衬底上沉积CeO2薄涂层（3-5 μm），获得了坚固的疏水REO陶瓷表面。结果表明，镀层的疏水性、微观结构、表面形貌和沉积效率均由基体决定。更重要的是，证明了SHVOF喷涂CeO2涂层的近超疏水性不仅是由于REO本身的疏水性，而且是由于其独特的层次结构。此外，涂层的表面疏水性对O/Ce比敏感，这可以解释REO涂层的“延迟”疏水性。
This study has presented an efficient coating method, namely suspension high velocity oxy-fuel (SHVOF) thermal spraying, to produce large super-hydrophobic ceramic surfaces with a unique micro- and nano-scale hierarchical structures to mimic natural super-hydrophobic surfaces. CeO2 was selected as coatings material, one of a group of rare-earth oxide (REO) ceramics that have recently been found to exhibit intrinsic hydrophobicity, even after exposure to high temperatures and abrasive wear. Robust hydrophobic REO ceramic surfaces were obtained from the deposition of thin CeO2 coatings (3–5 μm) using an aqueous suspension with a solid concentration of 30 wt.% sub-micron CeO2 particles (50–200 nm) on a selection of metallic substrates. It was found that the coatings’ hydrophobicity, microstructure, surface morphology, and deposition efficiency were all determined by the metallic substrates underneath. More importantly, it was demonstrated that the near super-hydrophobicity of SHVOF sprayed CeO2 coatings was achieved not only by the intrinsic hydrophobicity of REO but also their unique hierarchically structure. In addition, the coatings’ surface hydrophobicity was sensitive to the O/Ce ratio, which could explain the ‘delayed’ hydrophobicity of REO coatings.
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影响因子：
5.4
作者：
Ganvir, Ashish;Curry, Nicholas;Toma, Filofteia-Laura
通讯作者：
Toma, Filofteia-Laura
影响因子：
3.1
作者：
Killinger, A.;Mueller, P.;Gadow, R.
通讯作者：
Gadow, R.
影响因子：
3.1
作者：
Mueller, Philipp;Killinger, Andreas;Gadow, Rainer
通讯作者：
Gadow, Rainer
影响因子：
3.7
作者：
Da Silva, Juarez L. F.;Ganduglia-Pirovano, M. Veronica;Kresse, Georg
通讯作者：
Kresse, Georg
DOI：
10.1017/s0266267119000191
发表时间：
--
期刊：
ECONOMICS AND PHILOSOPHY
影响因子：
1.33
作者：
John O’Neill
通讯作者：
John O’Neill