Relevant bibliographies by topics / Nano-structured Coatings

Academic literature on the topic 'Nano-structured Coatings'

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Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Nano-structured Coatings"

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Pan, Xumeng, Yada Li, Adil O. Abdullah, Weiqiang Wang, Min Qi, and Yi Liu. "Micro/nano-hierarchical structured TiO 2 coating on titanium by micro-arc oxidation enhances osteoblast adhesion and differentiation." Royal Society Open Science 6, no. 4 (April 2019): 182031. http://dx.doi.org/10.1098/rsos.182031.

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Nano-structured and micro/nano-hierarchical structured TiO 2 coatings were produced on polished titanium by the micro-arc oxidation (MAO) technique. This study was conducted to screen a suitable structured TiO 2 coating for osteoblast adhesion and differentiation in dental implants. The formulation was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and wettability testing. Adhesion, proliferation and osteogenic differentiation of MG63 cells were analysed by SEM, Cell Counting Kit-8 (CCK-8) and quantitative real-time PCR. The micro/nano-hierarchical structured TiO 2 coating with both slots and pores showed the best morphology and wettability. XRD analysis revealed that rutile predominated along with a minor amount of anatase in both TiO 2 coatings. Adhesion and extension of MG63 cells on the micro/nano-hierarchical structured TiO 2 coating were the most favourable. MG63 cells showed higher growth rates on the micro/nano-hierarchical structured TiO 2 coating at 1 and 3 days. Osteogenic-related gene expression was markedly increased in the micro/nano-hierarchical structured TiO 2 coating group compared with the polished titanium group at 7, 14 and 21 days. These results revealed the micro/nano-hierarchical structured TiO 2 coating as a promising surface modification and suitable biomaterial for use with dental implants.
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Calderon, Sebastian, Cristiana F. Almeida Alves, Noora K. Manninen, Albano Cavaleiro, and Sandra Carvalho. "Electrochemical Corrosion of Nano-Structured Magnetron-Sputtered Coatings." Coatings 9, no. 10 (October 20, 2019): 682. http://dx.doi.org/10.3390/coatings9100682.

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Magnetron sputtering has been employed for several decades to produce protective and multi-functional coatings, thanks to its versatility and ability to achieve homogeneous layers. Moreover, it is suitable for depositing coatings with very high melting points and that are thermodynamical unstable, which is difficult to accomplish by other techniques. Among these types of coating, transition metal (Me) carbides/nitrides (MeC/N) and amorphous carbon (a-C) films are particularly interesting because of the possibility of tailoring their properties by selecting the correct amount of phase fractions, varying from pure MeN, MeC, MeCN to pure a-C phases. This complex phase mixture can be even enhanced by adding a fourth element such Ag, Pt, W, Ti, Si, etc., allowing the production of materials with a large diversity of properties. The mixture of phases, resulting from the immiscibility of phases, allows increasing the number of applications, since each phase can contribute with a specific property such as hardness, self-lubrication, antibacterial ability, to create a multifunctional material. However, the existence of different phases, their fractions variation, the type of transition metal and/or alloying element, can drastically alter the global electrochemical behaviour of these films, with a strong impact on their stability. Consequently, it is imperative to understand how the main features intrinsic to the production process, as well as induced by Me and/or the alloying element, influence the characteristics and properties of the coatings and how these affect their electrochemical behaviour. Therefore, this review will focus on the fundamental aspects of the electrochemical behaviour of magnetron-sputtered films as well as of the substrate/film assembly. Special emphasis will be given to the influence of simulated body fluids on the electrochemical behaviour of coatings.
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Cheng, Zhi Fang, Hong Sheng Ding, Hui Rong, and Li Geng Zhao. "Abrasion Resistance of Alumina-Titanium Dioxid Coating at High Temperature." Applied Mechanics and Materials 302 (February 2013): 115–18. http://dx.doi.org/10.4028/www.scientific.net/amm.302.115.

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Nano-structured and micron Al2O3-13%TiO2 coatings were deposited by air plasma spraying.Wear properties of the coatings under different temperature trough SRV friction and wear testing machine were studied, the results shows that the friction coefficient of nano and micron Al2O3-13%TiO2 coatings both have rising trend.with the temperature increases.The wear volume of micron coating is 1.8-2 times that of the nano coating..The nanometer Al2O3-13%TiO2 coating slide with ZrO2 is still compact and has no large crack after abrasion.
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James, Stephen W., and Ralph P. Tatam. "Fibre optic sensors with nano-structured coatings." Journal of Optics A: Pure and Applied Optics 8, no. 7 (June 7, 2006): S430—S444. http://dx.doi.org/10.1088/1464-4258/8/7/s19.

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Huan, Yuchun, Kaidi Wu, Changjiu Li, Hanlin Liao, Marc Debliquy, and Chao Zhang. "Micro-nano structured functional coatings deposited by liquid plasma spraying." Journal of Advanced Ceramics 9, no. 5 (August 10, 2020): 517–34. http://dx.doi.org/10.1007/s40145-020-0402-9.

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Abstract Inspired by the micro-nano structure on the surface of biological materials or living organisms, micro-nano structure has been widely investigated in the field of functional coatings. Due to its large specific surface area, porosity, and dual-scale structure, it has recently attracted special attention. The typical fabrication processes of micro-nano structured coatings include sol-gel, hydrothermal synthesis, chemical vapor deposition, etc. This paper presents the main features of a recent deposition and synthesis technique, liquid plasma spraying (LPS). LPS is an important technical improvement of atmospheric plasma spraying. Compared with atmospheric plasma spraying, LPS is more suitable for preparing functional coatings with micro-nano structure. Micro-nano structured coatings are mainly classified into hierarchical-structure and binary-structure. The present study reviews the preparation technology, structural characteristics, functional properties, and potential applications of LPS coatings with a micro-nano structure. The micro-nano structured coatings obtained through tailoring the structure will present excellent performances.
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Guo, Pei, Jie Xiong, Xiaohui Zhao, Bowan Tao, and Xingzhao Liu. "Nano-structured optical hetero-coatings for ultraviolet protection." Materials Letters 152 (August 2015): 290–92. http://dx.doi.org/10.1016/j.matlet.2015.03.129.

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Fedel, Michele, Flavio Deflorian, Sandra Diré, Valeria Tagliazucca, Roberta Bongiovanni, and Lorenzo Vescovo. "Characterization of Nano-structured UV Cured Acrylic Coatings." ECS Transactions 24, no. 1 (December 17, 2019): 51–66. http://dx.doi.org/10.1149/1.3453606.

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Bagcivan, N., K. Bobzin, and S. Theiß. "Synthesis of nano-structured HPPMS CrN/AlN coatings." Journal of Physics D: Applied Physics 46, no. 8 (February 1, 2013): 084001. http://dx.doi.org/10.1088/0022-3727/46/8/084001.

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Prabhakar, SV. "Nano-Pyramid Structured Coatings for Demanding Tribological Applications." International Journal of Current Engineering and Technology 2, no. 2 (January 1, 2010): 250–54. http://dx.doi.org/10.14741/ijcet/spl.2.2014.45.

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Das, Purnendu, Soumitra Paul, and P. P. Bandyopadhyay. "HVOF sprayed diamond reinforced nano-structured bronze coatings." Journal of Alloys and Compounds 746 (May 2018): 361–69. http://dx.doi.org/10.1016/j.jallcom.2018.02.307.

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Dissertations / Theses on the topic "Nano-structured Coatings"

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Xiao, Xiaoling, and S3060677@student rmit edu au. "Characterization of nano-structured coatings containing aluminium, aluminium-nitride and carbon." RMIT University. Applied Sciences, 2008. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20081217.100453.

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There is an every increasing need to develop more durable and higher performing coatings for use in a range of products including tools, devices and bio-implants. Nano-structured coatings either in the form of a nanocomposite or a multilayer is of considerable interest since they often exhibit outstanding properties. The objective of this thesis was to use advanced plasma synthesis methods to produce novel nano-structured coatings with enhanced properties. Coatings consisting of combinations of aluminum (Al), aluminum nitride (AlN) and amorphous carbon (a-C) were investigated. Cathodic vacuum arc deposition and unbalanced magnetron sputtering were used to prepare the coatings. By varying the deposition conditions such as substrate bias and temperature, coatings with a variety of microstructures were formed. A comprehensive range of analytical methods have been employed to investigate the stoichiometry and microstructure of the coatings. These include Transmission Electron Microscopy (TEM), Scanning Transmission Electron Microscopy (STEM), Electron Energy Loss Spectroscopy, Auger Electron Spectroscopy, X-ray diffraction and Raman spectroscopy. In addition to the investigation of microstructure, the physical properties of the coatings were measured. Residual stress has been recognized as an important property in the study of thin film coatings since it can greatly affect the quality of the coatings. For this reason, residual stress has been extensively studied here. Hardness measurements were performed using a nano indentation system, which is sensitive to the mechanical properties of thin films. This thesis undertook the most comprehensive investigation of the Al/AlN multilayer system. A major finding was the identification of the conditions under which layers or nanocomposite form in this system. A model was developed based on energetics and diffusion limited aggregation that is consistent with the experimental data. Multilayers of a-C and Al were also found to form nanocomposites. No hardness enhancement as a function of layer thickness or feature size was observed in either the Al/AlN or a-C/a-C systems. It was found that the most important factor which determines hardness is the intrinsic stress, with films of high compressive stress exhibiting the highest hardness. Nano-structured multilayers of alternating high and low density a-C were investigated. For a-C multilayers prepared using two levels of DC bias, evidence of ion beam induced damage was observed at the interfaces of both the low and high density layers. In addition, the structure of the high density (ta-C, known as tetrahedral amorphous carbon) layers was found to be largely unchanged by annealing. These results extend our understanding of how a-C form from energetic ion beams and confirms the thermal stability of ta-C in a multilayer. This thesis also presented the first attempt to synthesis a-C multilayered films with a continuously varying DC bias in sinusoidal pattern. The resulting films were shown to have a structurally graded interface between layers and verified that ion energy and stress are the most important factors which determine the structure of a-C films.
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Algodi, Samer Jasim Mahmood. "Characterisation, modelling and tribological investigations of nano-structured TiC-based electrical discharge coatings." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/55168/.

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Electrical discharge coating (EDC) is a surface modification process used to produce hard coatings from a sacrificial powder metallurgy (PM) tool electrode onto a target workpiece. However, the integrity of as-processed EDC surfaces, as reported on in literature, is generally poor, with limited understanding of the fundamental interactions between energy source and workpiece material, and the microstructural development of the surfaces created. This thesis explores, at the nano-scale, the deposition and microstructural development of ED processed cermet coatings. Emphasis is given to TiC-based ED coatings, prepared using a semi-sintered TiC tool electrode. A comprehensive study of TiC/Fe cermet coating microstructural development, as a function of ED processing conditions (current 2 - 19 A; pulse-on time 2 - 64 μs) is presented, using the combined characterisation techniques of scanning electron microscopy (SEM) / energy dispersive X-ray spectroscopy (EDS), X-ray diffractometry (XRD) and cross-sectional transmission electron microscopy (TEM). The ED coatings were composites in nature, with complex banded nanostructures of TiC grains within an Fe matrix. Preferred TiC/Fe ED coatings on 304-SS, achieved under conditions of low processing energy (10 A current and 8 μs pulse-on time), exhibited low levels of cracks and porosity, with hardness values of ~ 1800 HV. The fraction of energy transferred to the workpiece, Fv, as a consequence of ED sparking, is an important parameter which affects directly individual crater geometry and the microstructural development of the near surface modified layer. Hence, a 2D transient heat transfer model is presented, using finite difference methods, and used to estimate effective values for Fv as a function of processing conditions, and thereby to predict coating layer thicknesses of developed microstructures through appropriate consideration of heat flow into the system. The model is validated against previous work in literature and with experimental observations. The modelling demonstrated a variation of energy transferred to the workpiece, of 17 - 23% for increasing current from 2 - 19 A at fixed pulse-on time of 8 μs; and 7 - 53% for increasing pulse-on time from 2 - 64 μs at fixed current of 10 A. Predictions for heat transfer and the cooling of melt pools, arising from single spark events, compared well with experimental observations for the development of these TiC/Fe cermet microstructures. The cooling phase had two distinct stages, with initial rapid non-uniform cooling within the first ~ 10 - 20 μs leading up to the onset of TiC crystallisation, followed by a more uniform stage of heat loss up to ~ 100 μs, leading up to the onset of Fe matrix solidification. The tribological behaviours of TiC/Fe ED cermet coatings on both HSS and 304-SS substrates were investigated, with reference Cu EDM surfaces. The wear resistance of these cermet coatings, on both substrate types, yielded dry sliding wear resistances up to two orders of magnitude greater than that of the substrate. Further, EDC cermet coatings on HSS were typically 2 - 4 times more wear resistant, depending on loading, than those deposited on 304-SS, with wear performances reflecting the composite nature of the coatings coupled with the mechanical properties of the substrates. Laser surface treatments, used to improve the surface integrity of the as-deposited coatings, through the elimination of cracks and porosity, acted to increase the wear rate for all samples, with the exception of coatings on HSS under conditions of high loading. The general increase in wear rate was attributed to a significant reduction in the proportion of TiC within the ED coatings, after laser treatment, combined with an increase in grain size; whilst improvements to the wear performance of laser treated, cermet coated HSS, under high loading, was attributed to the avoidance of an abrasive wear mechanism.
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Ur, Rehman Muhammad Atiq [Verfasser], Aldo R. [Akademischer Betreuer] Boccaccini, Sannakaisa [Gutachter] Virtanen, and Tomasz [Gutachter] Moskalewicz. "Electrophoretic Deposition (EPD) of Bioactive (nano) Structured Composite Coatings on Metallic Substrates and their Corrosion, Degradation, Biological and Wear Behavior / Muhammad Atiq Ur Rehman ; Gutachter: Sannakaisa Virtanen, Tomasz Moskalewicz ; Betreuer: Aldo R. Boccaccini." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2019. http://d-nb.info/1177368625/34.

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Kim, Yoo Sung. "Active Nano-Structured Composite Coatings for Corrosion and Wear Protection of Steel." Thesis, 2013. http://hdl.handle.net/1969.1/151171.

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In order to obtain sustainable engineering systems, this research investigates surface and interface properties of metals and active nanostructured coatings. The goal is to develop new approaches in order to improve the corrosion resistance and obtain knowledge in reconstruction of worn and/or corroded surfaces. The research will focus on high carbon steels as the substrate. These materials are used in most of industries and vehicles like aircrafts and automobiles. For anti-corrosion and self-healing applications, the layer-by-layered (LBL) coatings consisting photo-catalytic materials, the corrosion inhibitor, and the polyelectrolyte will be studied. Potential dynamic tests will be carried out in order to characterize the corrosion potential and current. For wear study, we will develop a metallic composite that has several functions, such as corrosion and wear protection, refresh or reverse worn or corroded surface. Characterization techniques used include optical microscope, surface interferometer, tribometer and the hardness tester. The ultimate goal of this research is to understand several types of problems on metal surface, such as corrosion and wear, and explore the possible ways to reduce those by using active nano-structured composite coating on metal surface.
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Wu, Chia-Ying, and 吳佳穎. "Tribological performance of thermal sprayed Ni-based alloy coatings reinforced with nano-structured and conventional WC/Co particles." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/53836566861703032759.

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碩士
國立成功大學
機械工程學系碩博士班
95
The main purpose of this research was to study the effects of WC addition on mechanical and tribological properties, and anti-oxidation of Ni-based thermal sprayed coatings. The WC/Ni coatings were prepared by thermal spraying technique. The experiment was divided into three parts. In the first part, the effect of content (0-60 % of WC addition) on the properties of Ni-based alloy coatings was investigated. In the second part, the effect of WC grain size, micro-scale (conventional) and nano-scale, on the properties of Ni-based alloy coatings was investigated. In the third part, the effects of thermal spraying processes (HVOF and Flame spray/fusion) on the properties of WC/Ni thermal sprayed coatings were investigated. The results revealed that the hardness, wear resistance, and oxidation resistance of WC/Ni coatings were increased with increasing content of WC addition. And, the coatings with 60 % WC addition showed the best properties. The performance of the Ni-based alloy coatings added with nano-structured WC was better than the ones added with conventional WC. It was proved that nano-structured WC provides better enhancements on Ni-based sprayed alloy coatings. The properties of the coatings prepared by HVOF were superior to the ones prepared by flame spray/fusion process. It was learned that coatings studied here were more suitable to be prepared by HVOF process. In conclusion, the Ni-based sprayed alloy coatings with addition of 60 % nano-structured WC prepared by HVOF had the highest hardness HV0.21853.8, the best wear resistance, and oxidation resistance.
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林大森. "Utilization of Super Water-Repellent Coating Based on Nano-structured Materials." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/49675652066343805352.

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碩士
中華大學
營建管理研究所
93
Nanotechnology will bring an industrial revolution and change worldwide economic activities and human daily extensively . The develop tendency of building coating is water-coating. Because it is conform to environmental, health, and that is not pollution. This is the main motivation to enhance the performance of original building coatings and life cycle of construction engineering. Because of the unique physical and chemistry characteristics in nano-scale, this project attempts to promote the performances of nanocoatings. Among the nanotechnilogies have raised much attraction for nano-coatings that because of their widely applications. By using a commercial low-cost building coating as standard sample, zinc and titanium dioxide nanoparticles and functional binder are added into the coating to prepare the nanocoating through a suitable dispersion process. The optimal ratio and coating performances can be determined by Design of Experiments（DOE）is Taguchi method and scientific instruments, including TEM, XRD…, and so on. Coatings can be developed by employing processing parameters and optimal ratio. We believe that the nanocoating will give us an environmental protection, health, and sustainable life environment.
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Book chapters on the topic "Nano-structured Coatings"

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Fang, Zhen. "Nano-Structured Coatings." In Rapid Production of Micro- and Nano-particles Using Supercritical Water, 57–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-12987-2_4.

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Han, Zhi Hai, Hai Jun Wang, Shi Kui Zhou, and Bin Shi Xu. "Thermal Shock Behavior of Nano-Structured Functionally Graded Thermal Barrier Coatings Deposited by Supersonic Plasma Spray." In Key Engineering Materials, 2624–27. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-410-3.2624.

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Markashova, L., Yu Tyurin, O. Berdnikova, O. Kolisnichenko, I. Polovetskyi, and Ye Titkov. "Effect of Nano-Structured Factors on the Properties of the Coatings Produced by Detonation Spraying Method." In Lecture Notes in Mechanical Engineering, 109–17. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6133-3_11.

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Heo, Deog Do, Young Jei Oh, and B. S. Jun. "Nano Structured Silica Aerogel Films by Dip-Coating Process." In Solid State Phenomena, 1221–24. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-31-0.1221.

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Bonanno, Antonino, Mariarosa Raimondo, and Stefano Zapperi. "Surface Nano-structured Coating for Improved Performance of Axial Piston Pumps." In Factories of the Future, 295–314. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-94358-9_14.

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Ajay, A. V., Sivakumar S. Nair, Sreejith Mohan, and Y. Vaisakh. "Investigation on the Influence of Nano Structured Zirconia Coating on the Corrosion Inhibition of SS 304 Stainless Steel." In Advanced Manufacturing and Materials Science, 203–12. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76276-0_20.

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Saurdi, I., M. H. Mamat, A. Ishak, and M. Rusop. "Structural, Optical and Electrical Properties of Nano-structured Sn-doped ZnO Thin Film via Sol Gel Spin Coating Technique." In InCIEC 2014, 937–47. Singapore: Springer Singapore, 2015. http://dx.doi.org/10.1007/978-981-287-290-6_82.

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Ali, Shimaa M. "Synthesis, Characterization and Applications of Nano-Structured Sol-Gel Coatings." In Encyclopedia of Renewable and Sustainable Materials, 596–604. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-12-803581-8.10544-2.

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"Titanium Oxide Nano- and Submicron-Structured Coating for Ti and Ti-Related Bio-Implants." In Oxide Nanostructures, 243–80. Jenny Stanford Publishing, 2014. http://dx.doi.org/10.1201/b15633-12.

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Conference papers on the topic "Nano-structured Coatings"

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Word, R. C., and R. Konenkamp. "Polymer coatings on nano-structured semiconductor surfaces." In 2006 Sixth IEEE Conference on Nanotechnology. IEEE, 2006. http://dx.doi.org/10.1109/nano.2006.247706.

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Ishaq, Imran, Stephen W. James, Geoffrey J. Ashwell, and Ralph P. Tatam. "Cascaded long period gratings with nano-structured coatings." In Bruges, Belgium - Deadline Past. SPIE, 2005. http://dx.doi.org/10.1117/12.624270.

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Yar-Mukhamedova, Gulmira. "CORROSION INFLUENCE ON MICROHARDNESS CHANGES OF NANO-STRUCTURED COMPOSITION COATINGS." In 15th International Multidisciplinary Scientific GeoConference SGEM2015. Stef92 Technology, 2015. http://dx.doi.org/10.5593/sgem2015/b61/s24.006.

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Swaminathan, V. P., Ronghua Wei, and David W. Gandy. "Nano-Technology Coatings for Erosion Protection of Turbine Components." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-50713.

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Solid particle erosion (SPE) and liquid droplet erosion (LDE) cause severe damage to turbine components and lead to premature failures, business loss and repair costs to power plant owners and operators. Under a program funded by the Electric Power Research Institute (EPRI), TurboMet International (TMET) and Southwest Research Institute (SWRI) have developed hard erosion resistant nano-coatings and conducted evaluation tests. These coatings are targeted for application in steam and gas turbines to mitigate the adverse effects of SPE and LPE on rotating blades and stationary vanes. Based on a thorough study of the available information, most promising coatings such as nano-structured titanium silicon carbo-nitride (TiSiCN), titanium nitride (TiN) and multilayered nano coatings were selected. State-of-the-art nano-technology coating facilities at SwRI were used to develop the coatings. Plasma enhanced magnetron sputtering (PEMS) method was used to apply these coatings on various substrates. Ti-6Al-4V, 12Cr, 17-4PH, and Custom 450 stainless steel substrates were selected based on the current alloys used in gas turbine compressors and steam turbine blades and vanes. Coatings with up to 30 micron thickness have been deposited on small test coupons. Initial screening tests on coated coupons by solid particle erosion testing indicate that these coatings have excellent erosion resistance by a factor of 20 over the bare substrate. Properties of the coating such as modulus, hardness, microstructural conditions including the interface, and bond strength were determined. Tests are in progress to determine the effects of coatings on the tensile and high-cycle fatigue strengths of these alloys.
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Sanin, V. N., D. M. Ikornikov, D. E. Andreev, and V. I. Yukhvid. "Cast Protective Coatings of Nano-Structured Polymetallic HEAs by Means of Centrifugal SHS Process." In 13th International Symposium on Multiscale, Multifunctional and Functionally Graded Materials. São Paulo: Editora Edgard Blücher, 2014. http://dx.doi.org/10.5151/matsci-mmfgm-016-f.

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Bokai Zhang, Chi Tat Kwok, Fai Tsun Cheng, and Hau Cheung Man. "Fabrication of nano-structured HA/CNT coatings on Ti6Al4V by electrophoretic deposition for biomedical applications." In 2010 IEEE 3rd International Nanoelectronics Conference (INEC). IEEE, 2010. http://dx.doi.org/10.1109/inec.2010.5425191.

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Argon, A. S. "Role of Plastic Resistance of Amorphous Covalent Compounds in the Superior Performance of Superhard Nano-Structured Ceramic Composite Coatings for Cutting Tools." In MATERIALS PROCESSING AND DESIGN: Modeling, Simulation and Applications - NUMIFORM 2004 - Proceedings of the 8th International Conference on Numerical Methods in Industrial Forming Processes. AIP, 2004. http://dx.doi.org/10.1063/1.1766493.

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Shan, Y. G., Y. Hu, and X. Qi. "Numerical Simulation of the Injection of Solution Sprays Into a Plasma Jet." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22542.

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Plasma spraying using solution precursors is a relative new thermal spray technology which enables to elaborate finely structured ceramic coatings with nano- and sub-micrometric features. This process involves the injection of a solution spray of ceramic salts into a plasma jet either as a liquid stream or gas atomized droplets. Solution droplets or the stream interacts with the plasma jet and break up into fine droplets. The solvent vaporizes very fast as the droplets travel downstream followed by precipitation and pyrolysis. Depending on the heating and trajectory history of droplets, different states of particles are formed and impact on the substrate to generate coatings. The deposition process and the properties of the coating are extremely sensitive to the process parameters, such as torch operating conditions, injection modes, injection parameters, and substrate temperatures. This paper describes a 3D model to simulate the transport phenomena and the trajectory and heating of the solution spray in a plasma jet. A simplified model is employed to simulate the evolution process and the formation of the solid particle from the solution droplet. The temperature and velocity fields of the jet are predicted. The effect of the injection angle, injection velocity, the torch operating power and the substrate position on the heating and trajectory of injected droplets is discussed. The particle/droplet size distributions on the substrate are predicted for different process parameters.
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Merrill, Marriner H. "Large-Scale Electrospray Ionization Methods for Nanocoating Application." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38799.

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A scalable nano-coating process is needed that can be applied at atmospheric temperatures and pressures with low waste. This would enable the efficient production of advanced thin-film materials from solar cells to super-hydrophobic surfaces. Unfortunately, current methods for producing nanoparticle or nano-structured macromolecular coatings often require substrate immersion, specific atmospheres, and/or long growth times. One potential technique to overcome these challenges would be to use electrospray ionization (ESI) to first disperse large numbers of nanoparticles or polymers in air at standard conditions, and then deposit these on a substrate. ESI is a relatively mature technology, and although it has been developed largely for processing microliter volumes in mass spectrometry, it is believed that the fundamental science can be scaled up. This work presents a model for an ESI deposition method. It combines scaling laws for charged jets with spray and fission models to capture relevant charge, spray, fission, and evaporation phenomena. The developed model is shown to be very simple and efficient while still matching published experimental results. Using the model, current ESI techniques are compared such as NanoESI and Flow-Focusing ESI. A significant technological challenge to ESI deposition is discovered to be the trapping of the majority of the solute in a few primary droplets. Different solutions to this challenge are examined and used to define the direction for future work.
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10

Sarshar, Mohammad Amin, Christopher Swarctz, Scott Hunter, John Simpson, and Chang-Hwan Choi. "Superhydrophobic Surfaces Properties for Anti-Icing." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63282.

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In this paper, the iceophobic properties of superhydrophobic surfaces are compared to those of uncoated aluminum and steel plate surfaces as investigated under dynamic flow conditions by using a closed loop low-temperature wind tunnel. Superhydrophobic surfaces were prepared at the Oak Ridge National Laboratory by coating aluminum and steel plates with nano-structured hydrophobic particles. The contact angle and contact angle hysteresis measured for these surfaces ranged from 165–170° and 1–8°, respectively. The superhydrophobic plates along with uncoated control ones were exposed to an air flow of 12 m/s and 20°F with micron-sized water droplets in the icing wind tunnel and the ice formation and accretion were probed by using high speed cameras for 90 seconds. Results show that the developed superhydrophobic coatings significantly delay the ice formation and accretion even with the impingement of accelerated super-cooled water droplets, but there is a time scale for this phenomenon which has a clear relation with contact angle hysteresis of the samples. Among the different superhydrophobic coating samples, the plate having the lowest contact angle hysteresis showed the most pronounced iceophobic effects, while the correlation between static contact angles and the iceophobic effects was not evident. The results suggest that the key parameter for designing iceophobic surfaces is to retain a low contact angle hysteresis, rather than to have only a low contact angle, which can result in more efficient anti-icing properties in dynamic flow conditions.
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Reports on the topic "Nano-structured Coatings"

1

Luzinov, Igor, and Konstantin Kornev. Functionalized Nano and Micro Structured Composite Coatings. Fort Belvoir, VA: Defense Technical Information Center, June 2011. http://dx.doi.org/10.21236/ada552528.

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