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Journal articles on the topic 'Nano-structured Coatings'

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Published: 4 June 2021
Last updated: 1 February 2022

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1

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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2

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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3

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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4

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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5

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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6

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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7

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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8

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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9

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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10

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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11

BOZORGTABAR, MARYAMOSSADAT, MEHDI SALEHI, MOHAMMADREZA RAHIMIPOUR, and MOHAMMADREZA JAFARPOUR. "PHOTO-CATALYTIC ACTIVITY AND PHOTO-ABSORPTION OF PLASMA-SPRAYED NANO-STRUCTURED TiO2 COATINGS." International Journal of Modern Physics B 24, no. 31 (December 20, 2010): 6115–27. http://dx.doi.org/10.1142/s021797921005483x.

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Titanium dioxide coatings were deposited by utilizing atmospheric plasma-spraying system. The agglomerated P25/20 nano-powder and different spraying parameters (e.g., Argon flow rate and spray distance) were used to determine their influences on the microstructure, crystalline structure, photo-absorption, and photo-catalytic performance of the coatings. The microstructure and phases of as-sprayed TiO 2 coatings were characterized by scanning electron microscope SEM and X-ray diffraction, respectively. Surface characteristics were investigated by Fourier Transform Infrared. Photo-catalytic efficiency of the elaborated samples was also determined in an environmental test chamber set-up and evaluated from the conversion rate of ethanol. The photo-absorption was determined by UV–Vis spectrophotometer. The as-sprayed TiO2 coating was photo-catalytically reactive for the degradation of ethanol. The photo-catalytic activity was influenced by spray conditions. It is found that the photo-catalytic activity is significantly influenced by anatase content, surface area, and surface state. The results showed that the argon flow rate has an influence on the microstructure, anatase content, and photo-catalytic activity of the TiO 2 coatings.
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12

Sotova, Catherine, Nikolay Sitnikov, Jury Bublikov, Gaik Oganyan, and Andre D. L. Batako. "Influence of Thickness of Multilayer Composite Nano-structured Coatings on Tool Life of Metal-Cutting Tool." EPJ Web of Conferences 224 (2019): 05011. http://dx.doi.org/10.1051/epjconf/201922405011.

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The paper is focused on turning of structural steels C45. Cutting tools were represented by carbide cutting inserts without coatings, with reference coating TiAlN, as well as with multilayered composite nano-structured coatings Ti-TiN-(TiCrAl)N and Zr-ZrN-(ZrCrNbAl)N (of different thickness of 3-7 μm). The following studies of the properties of coated tools were carried out: measurement of microhardness and strength of adhesion bonds in the “tool-coating” system and investigation of elemental and phase compositions of coatings. The cutting tests were carried out at the following cutting modes: f = 0.2 mm/rev; аp = 1.0 mm; vc = 200, 250, 300, 350 and 400 m/min.
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13

WANG, TAO, NING WANG, YANG LI, HAO WANG, JIE TANG, and YUNSHAN WANG. "STUDY ON PREPARATION TECHNOLOGIES OF THERMAL BARRIER COATINGS." Surface Review and Letters 24, no. 04 (December 16, 2016): 1730004. http://dx.doi.org/10.1142/s0218625x17300040.

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Thermal barrier coatings (TBCs) is one of the main key technology for the high-pressure turbine blades which are the main components of the high-performance aerospace engines. It offers protection for underline metallic components from corrosion, oxidation and localized melting by insulating the metal from hot gases in the engine core. The properties and lifetime of TBCs are greatly influenced by the preparation technology, which includes plasma spraying (PS), physical vapor deposition (PVD) and laser re-melting (LM). In this paper, three technologies used to prepare the TBCs are reviewed. Resulting features of coating fabricated by each technology are also discussed such as: the porosity, the thermally grown oxide (TGO), the erosion resistance, the thermal shock and so on. Especially, it is pointed out that the performances of gradient coating and nano-coating are better than the traditional coatings. In addition, it is widely accepted that laser can be applied to re-melt the PS coating and even directly clad the gradient coating. In the future, the traditional preparation technology should be improved continually in order to enhance the coating lifetime, enhance the properties of coating and lower the cost of process. Moreover, the researches on gradient-nano-structured coatings preparation are absent and should be done with emphasis since the nano-structure and gradient structure can both benefit the lifetime and properties of coatings.
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14

Cheong, Jhun Yew, Xing Zhao Ding, Beng Kang Tay, and Xian Ting Zeng. "Thermal Stablility and Oxidation Resistance of CrAlSiN Nano-Structured Coatings Deposited by Lateral Rotating Cathode Arc." Key Engineering Materials 447-448 (September 2010): 725–29. http://dx.doi.org/10.4028/www.scientific.net/kem.447-448.725.

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In this paper, CrAlSiN coatings are deposited by a lateral rotating cathode arc technique. The high temperature oxidation behaviors of these coatings are studied in ambient atmosphere at temperatures ranging from 800°C-1000°C for an hour. The ternary TiAlN coating is used as the benchmark in this study. The surface morphology and chemical composition of the coating samples before and after oxidation at different temperatures are analyzed by scanning electron microscopy (SEM) equipped by energy dispersive X-ray spectrometer (EDX), glow discharge optical spectrometry (GDOS) and X-ray diffraction (XRD). The CrAlSiN coatings show much better oxidation resistance than the TiAlN coatings. TiAlN starts to oxidize from 800oC and forms a complete surface oxide layer after oxidation at 1000oC for an hour. However, CrAlSiN shows a relatively good oxidation resistance below 1000oC and only is oxidized to form a thin oxide scale with a thickness of 0.3 µm at 1000oC for one hour. It is found that the oxidation of both coatings is triggered from the surface metallic droplets generated by the arc deposition process.
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15

Mousavi, Behnam Kheyraddini, Tito Busani, Mani Hossein Zadeh, and Steven Roy Julien Brueck. "Enhancing Mechanical Stability of Nano-Structured Anti-Reflection Coatings." Journal of Applied Mathematics and Physics 08, no. 02 (2020): 247–58. http://dx.doi.org/10.4236/jamp.2020.82020.

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16

Das, Purnendu, ParthaPratim Bandyopadhyay, and Soumitra Paul. "Finish form grinding of thermally sprayed nano-structured coatings." Advances in Materials and Processing Technologies 5, no. 1 (August 16, 2018): 39–52. http://dx.doi.org/10.1080/2374068x.2018.1510680.

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17

Iqbal, Z., M. H. Asghar, M. Usman, A. ul Haq, A. Ismatullah, Nazir A. Naz, and I. Ahmed. "Dual band nano structured anti reflection thin film coatings." Protection of Metals and Physical Chemistry of Surfaces 52, no. 3 (May 2016): 481–85. http://dx.doi.org/10.1134/s2070205116030138.

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18

Vereschaka, Alexey, Maksim Oganyan, Yuri Bublikov, Nikolay Sitnikov, Konstantin Deev, Vladimir Pupchin, and Boris Mokritskii. "Increase in Efficiency of End Milling of Titanium Alloys Due to Tools with Multilayered Composite Nano-Structured Zr-ZrN-(Zr,Al)N and Zr-ZrN-(Zr,Cr,Al)N Coatings." Coatings 8, no. 11 (November 10, 2018): 395. http://dx.doi.org/10.3390/coatings8110395.

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The study deals with an increase in the tool life parameter for metal-cutting tools and efficiency of end milling for titanium alloys, due to the use of tools with multilayered composite nano-structured Zr–ZrN–(Zr,Al)N and Zr–ZrN–(Zr,Cr,Al)N coatings, deposited through the technology of the filtered cathodic vacuum arc deposition (FCVAD). The studies included the microstructured investigations using SEM, the analysis of chemical composition (Energy-dispersive X-ray spectroscopy, EDXS), the determination of the value of critical failure force (with the use of scratch testing), and the measurement of the microhardness of the coatings under study. The cutting tests were conducted in end milling of titanium alloys at various cutting speeds. The mechanisms of wear and failure for end milling cutters with the coatings under study were studied in milling. The studies determined the advantages of using a tool with the coatings under study compared to an uncoated tool, as well as to tools with the commercial Ti–TiN coating and the nano-structured Ti–TiN–(Ti,Al)N coating. Adding Cr to the composition of the coating can significantly increase the hardness, while the coating retains sufficient ductility and brittle fracture resistance, which allows for a best result when milling titanium alloys.
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19

Satpathy, Radhakanta, B. R. Mishra, B. Mallick, and B. K. Mishra. "Synthesis and Application of Nano structured Bi layer YSZ LZ Thermal Barrier Coating." Defence Science Journal 69, no. 2 (March 6, 2019): 185–94. http://dx.doi.org/10.14429/dsj.69.13212.

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Present work is on synthesis of high purity Nano-structured TBC materials, Lanthanum Zirconate and YSZ. They were prepared via wet chemical routes, starting from the indigenous source minerals such as zircon and monazite available in the beach sand. This is first time that the results of TBC materials synthesis from these base minerals, their purification and a high end application being presented comprehensively. Their characterisation and thermal barrier application on aeroengine components have been presented. The total oxide impurities being critical to the life of the coating, could be controlled within 0.03 per cent by weight. On comparison with other powders it was found that the indigenously synthesised YSZ powder had practically 100 per cent tetragonal prime phase and no monoclinic phase; whereas others had significant amounts of monoclinic phases present in them. Both YSZ and LZ powders were sinter agglomerated at 850 °C to preclude the possibility of any contamination and sieved. APS process was used to realise nano-structured bi-layer coating on the exhaust nozzle parts of an aeroengine. The components were subjected to rapid thermal transients during long accelerated endurance testing, equivalent to 1000 h of engine operations. The coatings also withstood the gas erosion of supersonic combustion products, vibratory loads of 4 g and more than 30000 nozzle actuations similar to aircraft maneuver. The paper also presents a brief review of implications of a nano-structured thermal barrier coating and certain nuances of chemical synthesis which forms the backbone of the strategies for durable coatings.
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20

Liu, Liang, Michael Layani, Shai Yellinek, Alexander Kamyshny, Han Ling, Pooi See Lee, Shlomo Magdassi, and Daniel Mandler. "“Nano to nano” electrodeposition of WO3 crystalline nanoparticles for electrochromic coatings." J. Mater. Chem. A 2, no. 38 (2014): 16224–29. http://dx.doi.org/10.1039/c4ta03431g.

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Nanoparticles in the dispersion are electrodeposited onto conductive substrates forming crystalline nano-structured films. The deposition process can be well manipulated, and the films prepared have excellent electrochromic performance.
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21

Gao, Wei, and Zhengwei Li. "Nano-structured alloy and composite coatings for high temperature applications." Materials Research 7, no. 1 (March 2004): 175–82. http://dx.doi.org/10.1590/s1516-14392004000100023.

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22

Lim, N. S., S. Das, S. Y. Park, M. C. Kim, and C. G. Park. "Fabrication and microstructural characterization of nano-structured WC/Co coatings." Surface and Coatings Technology 205, no. 2 (October 2010): 430–35. http://dx.doi.org/10.1016/j.surfcoat.2010.07.004.

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23

Huang, Heji, Zhiqiang Fu, Wenxia Pan, and Chengkang Wu. "Fast Plasma Sintering Deposition of Nano-structured Silicon Carbide Coatings." Physics Procedia 32 (2012): 598–604. http://dx.doi.org/10.1016/j.phpro.2012.03.606.

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24

Yang, Chao, Suihan Cui, Yuchang Weng, Zhongcan Wu, Liangliang Liu, Zhengyong Ma, Xiubo Tian, Ricky K. Y. Fu, Paul K. Chu, and Zhongzhen Wu. "Scalable superhydrophobic T-shape micro/nano structured inorganic alumina coatings." Chemical Engineering Journal 409 (April 2021): 128142. http://dx.doi.org/10.1016/j.cej.2020.128142.

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25

Park, S. Y., Moon Chul Kim, and Chan Gyung Park. "Improvement in Wear Resistance of Nano WC-Co Coatings Fabricated by Detonation Gun Spraying." Materials Science Forum 539-543 (March 2007): 1264–69. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.1264.

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Nano structured WC-Co coatings with carbide size of 100−200nm were fabricated by detonation gun spraying. The fabricated nano coatings showed improved hardness and wear resistance compared to micron WC-Co coatings. Considerable phase decomposition of WC to W2C and amorphous phase in nano coatings was detected, which is known to degrade wear resistance of coatings. In order to improve the wear resistance of the coatings by recovering of dissociated carbide phases, post heat treatment was conducted in Ar environment at temperature range of 400−900°C. Harness, fracture toughness and wear resistance of nano coatings were significantly improved by post heat treatment. The improved properties were elucidated and discussed in terms of microstructure and phase compositions.
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26

Bozsaky, David. "Series of Experiments with Thermal Insulation Coatings Consisted of Vacuum-Hollow Nano-Ceramic Microspheres." Acta Technica Jaurinensis 11, no. 1 (February 14, 2018): 17–33. http://dx.doi.org/10.14513/actatechjaur.v11.n1.447.

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Because of the rigorous regulations in the 21st century it has become a serious task for designers to find more effective ways for thermal insulation. One of these options is the application of nanotechnology-based materials. Among nano-scale structured materials the most uncertainties are found about the thermal insulating quality of thermal insulation coatings consisted of vacuum-hollow nano-ceramic microspheres. Complete agreement had not been already found about the mechanism of their insulating effect. In order to explore and describe the thermodynamic process inside nano-ceramic coatings (NCC) 6 series of heat transfer resistance experiments were performed in 2014-2017. Several building structure configurations with 12 different orders of layers were tested with a standard heat flow meter. On basis of these results it could be concluded that in case of nano-structured materials convective heat transfer coefficient might be taken account in different way than in case of traditional macro-structured thermal insulation materials.
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27

Fauchais, P., M. Vardelle, J. F. Coudert, A. Vardelle, C. Delbos, and J. Fazilleau. "Thermal plasma deposition from thick to thin coatings and from micro- to nanostructure." Pure and Applied Chemistry 77, no. 2 (January 1, 2005): 475–85. http://dx.doi.org/10.1351/pac200577020475.

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This paper is devoted to the presentation of our actual knowledge in plasma spraying. It presents successively: the parameters controlling the impact of the molten particles onto the substrate and resulting splat formation followed by splats layering and coating formation; the engineering of nano- or finely structured coatings with different possible routes; and the actual possibilities for the on-line control of the spray process.
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28

AMADEH, A., S. NADALI, S. M. LARI BAGHAL, and H. MORADI. "ELECTRIDEPOSITION AND WEAR BEHAVIOR OF NANO-STRUCTURED Cr-WC COMPOSITE COATINGS FROM A TRIVALENT CHROMIUM BATH." International Journal of Modern Physics: Conference Series 05 (January 2012): 737–43. http://dx.doi.org/10.1142/s2010194512002693.

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Electrodeposition of nano-structured Cr - WC had been carried out from a trivalent chromium bath using a square shaped pulse current. The average size of WC particles was 70 nm. The effect of sodium saccharin and sodium dodecyl sulfate (SDS) additives as well as pulse electroplating parameters such as current density, duty cycle and frequency on the amount of incorporated WC particles and morphology of the coatings was investigated. The structure and morphology of the coatings were studied by X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. In addition, the hardness and tribological behavior of the coatings were investigated by microhardness and pin on disk methods, respectively. The results showed that although the addition of saccharin and SDS decreased the amount of WC particles in the coating, but reduced the size of WC agglomerates which, in turn, increased the wear resistance of the coatings. Also, the optimum wear resistance was achieved at the current density of 8 A/dm2, duty cycle of 50% and frequency of 10 Hz.
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29

Бубликов, Юрий, Yuriy Bublikov, Анатолий Верещака, Anatoliy Vereshchaka, Алексей Верещака, Aleksey Vereshchaka, Максим Оганян, and Maksim Oganyan. "End milling cutter effectiveness increase by application of modificating nano-dimensional multilevel composition coatings." Bulletin of Bryansk state technical university 2015, no. 4 (December 30, 2015): 59–64. http://dx.doi.org/10.12737/17092.

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The problem of hard metal end milling cutter capacity for work increase on basis of tool physical stress strain properties modification by means of the formation of nano-structured multi level coatings on tool working surfaces with the use of filtered cathodevacuumarc deposition is developed. There is devel oped a system and a composition of three-component nano-structured multi-level composition modificating coatings for the deposition on working surfaces of end-milling cutters. The results of laboratory and industrial tests of end milling cutters with the developed coatings for the conditions of roughing and finishing are represented.
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30

Maleki-Ghaleh, H., M. Rekabeslami, M. S. Shakeri, M. H. Siadati, M. Javidi, S. H. Talebian, and H. Aghajani. "Nano-structured yttria-stabilized zirconia coating by electrophoretic deposition." Applied Surface Science 280 (September 2013): 666–72. http://dx.doi.org/10.1016/j.apsusc.2013.04.173.

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31

Li, H. Q., X. Y. Li, Hai Lin Sun, Dennis Teer, and Han Shan Dong. "Synthesis and Characterization of CrXN Nano-Multilayer Coatings." Key Engineering Materials 373-374 (March 2008): 126–29. http://dx.doi.org/10.4028/www.scientific.net/kem.373-374.126.

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Three types of nano-multilayer coatings, CrSiN, CrAlN and CrMoN, with different Si, Al and Mo contents were deposited on M42 substrates using a closed field unbalanced magnetron sputter ion plating (CFUMSIP) technique. Systematic characterization on the chemical composition, microstructure, hardness and wear properties of these multilayer coatings has been investigated using GDOES, low angle XRD, SEM, TEM, nanoindentation and wear tests. Experimental results revealed that all these three types of Cr, XN ternary coatings (X=Al, Si and Mo) are nano-multilayer structured. The CrAlN multilayer coatings showed the highest hardness and oxidation resistance among these three multilayer coatings. The CrMoN multilayer coatings exhibited the lowest friction coefficient although no appreciable improvements in wear resistance were observed as compared with the optimized CrN coatings.
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32

Sharma, Sarika, Sulaxna Sharma, Pooja Agarwala, Rajnish Garg, and P. Gopinath. "A Study on Ni-P and Ni-P-ZnO Composite Coatings Developed by Electroless Technique." Advanced Materials Research 585 (November 2012): 512–16. http://dx.doi.org/10.4028/www.scientific.net/amr.585.512.

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A new processing concept has been developed to produce nano structured metal matrix composite coatings. Electroless coatings of Ni-P and composite Ni-P-ZnO were developed by co-deposition process on mild steel substrates. Ni-P-ZnO coatings were prepared using conventional route i.e., ZnO particles of ~ 20 μm with average diameter were added to the bath (900C, pH ~9.0) and kept in suspension by stirring. Uniform and grayish bright coatings were observed. The coatings were heat treated at 400°C for 1h in argon atmosphere to attain crystalline nature of coating. The as-synthesized and heat treated Ni-P and composite Ni-P-ZnO coatings were characterized by XRD, FESEM and AFM.
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33

Wang, Xin, Dian Tang, and Jing En Zhou. "Study On Nano-Structured SnO2-23wt%TiO2-21wt%RuO2 Coated Titanium Anode." Solid State Phenomena 118 (December 2006): 603–8. http://dx.doi.org/10.4028/www.scientific.net/ssp.118.603.

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Sn is one of the most important elements for the Cl2-evolving anode coatings, but it always used as a minor additive. In this paper, an Sn-based ternary oxide coating with its composition of SnO2-23wt%TiO2-21wt%RuO2 was prepared by a sol-gel technique through etching, painting, sintering and annealing. The differential thermal analysis (DTA) shows that the crystallization behavior of the ternary xerogel is more similar to that of pure xerogels SnO2. X-rays diffraction (XRD) indicates that the coating is composed of rutile phase (Sn,Ti,Ru)O2. Any other undesired phases, for example, anatase TiO2 and metallic ruthenium phases are not found in the coatings. The microstructure and the morphologies were studied by a transmission electron microscope (TEM) and a scanning electron microscope (SEM). The results of energy dispersive spectrometer (EDS) indicate Sn content in the coatings remain at high level and coincident with the nominal composition. The grain sizes in the coatings are around 4 nm. The voltage of Cl2-evolution and O2-evolution shows the ternary coating has good electrochemical properties.
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34

Zhuk, Yuri. "Nano-Structured Tungsten Carbide Coating Reduces Wear of Tooling for Extrusion and Abrasive Materials Forming." Key Engineering Materials 651-653 (July 2015): 467–72. http://dx.doi.org/10.4028/www.scientific.net/kem.651-653.467.

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This paper presents the applications of advanced CVD Tungsten Carbide coating to extend the life of tooling used for forming abrasive and corrosive materials.Hardide nanostructured Tungsten Carbide coating combines high hardness (70-77Rc) with excellent toughness. Unlike other hard coatings Hardide can produce a conformal coating layer on complex-shaped tools, including internal surfaces of extrusion die cavities and moulds. In ASTM G65 test the Hardide coating abrasion resistance exceeded WC/Co (9%) cemented carbide by a factor of 4X, and D2 tool steel by 10X. Thus the coating can significantly increase the life of D2 steel tooling used for forming abrasive materials and by maintaining better dimensional tolerances and surface finish of the tool it will manufacture better quality products.The Hardide coating has enhanced resistance to corrosion and aggressive media, including acids; this makes the coating especially suitable for the tooling used in forming uPVC, PTFE and other corrosive materials.The Hardide coating has been tested on extrusion and pelletizing dies processing abrasive and corrosive slurries and typically showed a 3X increase in the life of the tooling. Similar results were achieved by the coating of powder compaction punch/die sets for pharmaceuticals tableting.
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35

Tepe, Bulent, and Banihan Gunay. "Evaluation of Environmentally Friendly Zr Based Nano Structured Conversion Coating for HRS (Hot Rolled Steel) in Powder Coating." Defect and Diffusion Forum 283-286 (March 2009): 316–22. http://dx.doi.org/10.4028/www.scientific.net/ddf.283-286.316.

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Metals, despite their deterioration in a corrosive atmosphere, continue to dominate the automotive, agricultural, furniture, process and appliance industries and HRS (Hot Rolled Steel) plays a significant role in those areas. Powder coating on HRS is widely employed for protective and aesthetic purposes. Prior to powder coating, phosphating conversion coating is often used to increase effectiveness of protection. However, due to tightening environmental legislations, phosphating process is now problems for industry. Therefore, newly developed environmentally friendly conversion coats are introduced to industry. In this study a new environmentally friendly zirconium fluoro-based (H2ZrF6) generation of conversion coating has been introduced to replace the conventional phosphating conversion coatings process. It is deposited on the surface with a thin nanometre range, therefore shortening the process, which also has advantages such as being free of heavy metal and operating in low or ambient temperature. The present work closely examines Zr based nano structured conversion coatings for HRS. Extensive corrosion and adhesion studies are carried out on differently prepared HRS test panels, pre-treated with Zr based conversion coating in various conditions, such as different composition ratio, temperature and contact time.
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36

Aglan, Anwar, Aldinton Allie, Adriane Ludwick, and Lawrence Koons. "Formulation and evaluation of nano-structured polymeric coatings for corrosion protection." Surface and Coatings Technology 202, no. 2 (November 2007): 370–78. http://dx.doi.org/10.1016/j.surfcoat.2007.05.090.

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37

Vereschaka, Alexey A., and Sergey N. Grigoriev. "Study of cracking mechanisms in multi-layered composite nano-structured coatings." Wear 378-379 (May 2017): 43–57. http://dx.doi.org/10.1016/j.wear.2017.01.101.

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38

Lin, Cheng-Yen, Kun-Yi Lin, Hui-Ping Tsai, Yi-Xuan He, and Hongta Yang. "Self-assembled dual-sided hemispherical nano-dimple-structured broadband antireflection coatings." Applied Physics Letters 109, no. 22 (November 28, 2016): 221601. http://dx.doi.org/10.1063/1.4971264.

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39

Ning, Li, Stephen C. Veldhuis, and Kenji Yamamoto. "INVESTIGATION OF NANO-STRUCTURED PVD COATINGS FOR DRY HIGH-SPEED MACHINING." Machining Science and Technology 11, no. 1 (February 20, 2007): 45–59. http://dx.doi.org/10.1080/10910340601172230.

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40

McDonnell, Kevin A., Niall J. English, Charlie P. Stallard, Mahfujur Rahman, and Denis P. Dowling. "Fabrication of nano-structured TiO2 coatings using a microblast deposition technique." Applied Surface Science 275 (June 2013): 316–23. http://dx.doi.org/10.1016/j.apsusc.2012.12.070.

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41

Chen, F., L. W. Lin, Chang Jian Lin, and W. W. Lu. "Electrophoretic Deposition of Hydroxyapatite Nano Coating on Etched Titanium Surface." Key Engineering Materials 288-289 (June 2005): 183–86. http://dx.doi.org/10.4028/www.scientific.net/kem.288-289.183.

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Hydroxyapatite (Ca10(PO4)6(OH)2, HAp) is biocompatible and bioactive, however, it is relatively brittle. The development of HAp coatings on medical metal surface is a good way to improve the mechanical properties of HAp. In the present study, a HAp coating with nano-structure on a roughened titanium surface was developed by electrophoretic deposition process. To decrease sintering temperature HAp nanoparticles synthesized by a wet chemical method was used. It was observed that the coating was uniform and showed no cracks. After sintering the HAp coating still remained nano structured. The surface treatment of Ti was applied to form a distribution of small pits and a TiO2 thin layer on the Ti surface that improves the adhesion of coating to the Ti substrate. It was shown that the bonding strength of coating was 18 ± 2.5MPa. The hardness and Young’s modulus were 40.6 and 0.42 GPa, respectively.
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42

Kohlscheen, Jörn, Hans Joachim Knoche, Martin Hipke, and Andreas Lümkemann. "Coating Development for Gear Cutting Tools." Key Engineering Materials 438 (May 2010): 35–40. http://dx.doi.org/10.4028/www.scientific.net/kem.438.35.

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Pre-machining of gear wheels is often done by hobbing using a soft work-piece material. Today, almost all of the hobs are used with a hard coating to enhance their life-time considerably. This paper describes the results obtained with a tailored coating in a single tooth cutting test (fly cutting). We show that a nano-structured multi-layer coating based on AlCrN is able to protect a tool better than conventional single-layer coatings. The specific mechanical and structural properties of the coating are explained in detail.
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43

Zhai, Dajun, Dongfang Du, and Hongqiang Dou. "Effect of NaF additive on the micro/nano-structure and properties of the microarc oxidation coating on Ti6Al4V alloy." Modern Physics Letters B 33, no. 22 (August 7, 2019): 1950265. http://dx.doi.org/10.1142/s0217984919502658.

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Micro/nano-structured coatings with antibacterial function were prepared by microarc oxidation (MAO) treatment on Ti6Al4V alloy in a silicate/phosphate electrolyte with a NaF additive. The microstructure, phase composition, and corrosion resistance of the coatings modified by adding NaF (0.15–0.5 M) were examined using scanning/transmission electron microscopy, energy dispersive spectroscopy, atomic force microscopy, X-ray diffraction, and potentiodynamic polarization. The results showed that the incorporation of F ion reduced the threshold voltage for electrons avalanche on the surface film of the Ti alloy, and increased the intensity and lifetime of discharge. MAO coatings with 100–500 nm nano-pores and 1–20 [Formula: see text]m micro-pores were formed by the modification of the NaF additive. The F ions promoted microarc discharge as well as phase transformation from the metastable anatase to the stable rutile phase. The F ions also promoted the generation of penetration cracks and bubbles in the coating. The surface roughness, phase content, and thickness of the coating were enhanced by the NaF additive. However, the corrosion resistance of the coating first increased and then decreased with the increasing F ion concentration, reaching a maximum when the NaF content was 0.25 M.
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44

Kim, Soomin, Yoram Cohen, Kari J. Moses, Shivani Sharma, and Muhammad Bilal. "Polysulfone surface nano-structured with tethered polyacrylic acid." Applied Surface Science 470 (March 2019): 411–22. http://dx.doi.org/10.1016/j.apsusc.2018.11.114.

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45

Citterio-Bigot, Helene, S. Jakani, Abdelilah Benmarouane, Pierre Millet, and Alain Lodini. "Nano-Hydroxyapatite Coatings on Titanium Substrates. Finite Element Analysis of Process and Experimental Plasma Thermal Sprayed Coatings." Key Engineering Materials 361-363 (November 2007): 745–48. http://dx.doi.org/10.4028/www.scientific.net/kem.361-363.745.

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The aim of this study was to create a nano-structured coating using Plasma Thermal Spraying (PTS). This process consists in introducing pre-agglomerated nanosized particles in a high-temperature and high-velocity gas jet and projected them onto the substrate to form, layer by layer, a nanostructured coating. In order to retain nanometer grain sizes in the deposited coating through specific PTS technologies, a thermal field and velocity distribution in the plasma jet are analytically calculated. A finite element analysis is employed to calculate the thermal field evolution inside the agglomerated particles and the thermal induced internal stress distribution is determined. The parameters determined by the theoretical analysis are used for experimental coatings. The average crystallite size of nano-hydroxyapatite powder was 90nm. After deposit via Plasma Thermal Spraying (PTS) process and followed by a 2 hours heat treatment to reduce amorphous fraction, the experimental deposited coating shows that it retains the nanometer crystallite sizes. The substructure of nanocrystals was evaluated at about 120nm in size. Such a nanocoating may play the role of nucleation site to bone, allowing a faster stabilization of the implant.
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46

Gevorgyan, Vladimir A., Alexander A. Dolgalev, Vitaliy A. Tarala, Naira R. Mangasaryan, and Boris V. Buchalov. "Investigation of the phase structure and surface morphology of the titanium nano-structured coatings for dental implants deposited by the method of magnetron sputtering." MATEC Web of Conferences 226 (2018): 03008. http://dx.doi.org/10.1051/matecconf/201822603008.

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In this work we develop a technology for deposition of titanium nano-structured coatings on titanium plain washers by magnetron sputtering and investigate the influence of technological conditions on the structural parameters of the deposited titanium coatings. Magnetron sputtering of pure 99.99% titanium coatings on titanium washers VT1.0 and VT6.0, has been developed. It is shown that by this method it is possible to form coatings of pure titanium with a nano-relief surface. Titanium coatings under varying deposition parameters were characterized by Scanning Electron Microscopy and Atom Force Microscopy. It is shown that titanium coatings deposited by magnetron sputtering technique have a nano-granular structure. The maximum surface irregularities vary within ± 150 nm, and the grain sizes vary from 50 nm to 450 nm. The obtained result is of great interest for further investigation of the influence of titanium coatings morphology and its nano-dimensional characteristics on the biochemical mechanisms responsible for the process of bone remodeling around the implant. It is established that titanium coatings allow not only to form on the implants a nano-relief surface, but also drastically reduce on this surface the concentration of toxic elements that are initially present in the implant material VT6.0.
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47

Kopytov, Eugene, Alexander Urbach, Valery Kutev, Vladimir Labendik, and Sergey Yunusov. "Information Support System for Technology of Applying the Multi-Component Nano-Structured Protective Coatings." Transport and Telecommunication Journal 13, no. 3 (January 1, 2012): 229–42. http://dx.doi.org/10.2478/v10244-012-0019-3.

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Information Support System for Technology of Applying the Multi-Component Nano-Structured Protective Coatings The given article considers the process of arranging informational support in carrying out experiments on applying the nanostructured protective covering on different materials. For nano-coverings coating, there is used special plant, which is given different modes of performance. For accounting all parameters and for accumulating the data, which characterize the results of the experiments, there is suggested an information system which employs the database designed for these purposes. The authors suggest an approach to defining the main requirements and functions of an information system on the basis of functional simulation and consider the issues of its realization. This information system also allows processing the results of the experiments with the use of statistical methods. The analytical module of the information system is supposed for solving the tasks of determining the thickness of covering depending on the specified mode of plant operation (pressure, voltage, current); it is also employed for determining what operation mode is required for receiving the covering with certain designated properties and parameters. Consequently, the task of scientific prognostication of the covering properties is solved.
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48

Верещака, Алексей, Aleksey Vereshchaka, Ойбек Хожаев, and Oybek Khozhaev. "Improving operational characteristics of tool from tungsten-free carbides (cermets) by nanostructured multilayer composite coatings." Bulletin of Bryansk state technical university 2014, no. 3 (September 30, 2014): 20–25. http://dx.doi.org/10.12737/23193.

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This paper discusses the issues of improving the efficiency of cutting tool made of tungsten-free carbides (cermets) by using nano-dispersed multi-layered composite coatings formed by use of innovative processes of filtered cathodic vacuum arc deposition (FCVAD). Developed composi-tions of nano-structured multi-layered composite coatings contributes to significant improvement of properties of cutting tool made of cermets in cutting constructional steel and expansion of their application area for machining of heat-resistant alloys.
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49

Karastoyanov, Dimitar, Todor Penchev, and Mara Kandeva. "Tribological Characteristics of Nano Structured Nickel Coatings for Renivating of Extruding Shafts." Applied Mechanics and Materials 217-219 (November 2012): 221–25. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.221.

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The methods for wear resistance testing is described and the experimental results for the dependence of the massive wear, wear speed, intensity of wear and wear resistance on the friction road and the time of a contact interaction are obtained. A testing micromanipulator with piezo actuators for measuring the roughness of the surface layer is developed. A methodology for thermographic testing and experimental results for wear and temperature changes in the contact by the wear process of the coatings under dry friction and abrasion is obtained
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50

Santos, Luis, Pascal Martin, Jalal Ghilane, Pierre Camille Lacaze, and Jean-Christophe Lacroix. "Micro/Nano-Structured Polypyrrole Surfaces on Oxidizable Metals as Smart Electroswitchable Coatings." ACS Applied Materials & Interfaces 5, no. 20 (October 14, 2013): 10159–64. http://dx.doi.org/10.1021/am402846n.

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