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Littérature scientifique sur le sujet « DLC »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 25 avril 2022

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Articles de revues sur le sujet "DLC"

1

Vengudusamy, Balasubramaniam, Jonathan H. Green, Gordon D. Lamb et Hugh A. Spikes. « Behaviour of MoDTC in DLC/DLC and DLC/steel contacts ». Tribology International 54 (octobre 2012) : 68–76. http://dx.doi.org/10.1016/j.triboint.2012.04.028.

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JANG, YOUNG-JUN, SEOCK-SAM KIM et JONG-JOO RHA. « THE EFFECT OF RESIDUAL STRESS ON THE WEAR PROPERTIES OF DLC COATINGS ». International Journal of Modern Physics B 24, n^o 15n16 (30 juin 2010) : 2977–82. http://dx.doi.org/10.1142/s0217979210065957.

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Multi-layer diamond-like carbon (DLC) coating, 150 and 220 nm thick were deposited by negative pulsed d.c. bias induced with magnetron sputtering. The objective of this research is to resolve a wear resistance in terms of DLC coating residual stress and mechanical properties. The bias was controlled from - 200 to 0 V during 10 second with point contacting controller. The surface structure was continuously fabricating to soft and hard-layer during deposition. It was shown that the compressive residual stress and hardness were 0.09, 18 GPa under multi-layer coating condition. The as-deposited DLC coating has a relatively higher wear resistance than unmodified DLC under nanoabrasive wear. It also showed that multi-layer DLC coating had no wear until 400 nN. The decreased residual stress and increased film hardness in the multi-layer coating gave a rise to increase wear resistance.

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Barry Piekos, W. « Diffracted Light Contrast : Improving the Resolution of a Basic Light Microscope by an Order of Magnitude ». Microscopy Today 14, n^o 6 (novembre 2006) : 10–15. http://dx.doi.org/10.1017/s155192950005882x.

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The discovery that the diffracted light from a convex edge can be used to form a very high-quality, shadowcast image on any light microscope has led to a device and method, diffracted-light contrast (DLC), which will allow shadowcast imaging to be routinely performed on student/laboratory microscopes (Piekos, 1999, 2003). The surface lattice of Surirella gema was easily resolved, and micrographs comparing the subcellular details of buccal epithelial cells viewed with DLC vs. Nomarski DIC showed that, on the microscopes used, DLC was superior in both the detail it rendered and depth of field. Although the images presented revealed DLC to be an excellent technique, the full capabilities of the technique were not known at the time.

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Boghe, Mark. « DLC Coatings ». MTZ worldwide 68, n^o 3 (mars 2007) : 12–14. http://dx.doi.org/10.1007/bf03226813.

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Boghe, Mark. « DLC-Beschichtungen ». MTZ - Motortechnische Zeitschrift 68, n^o 3 (mars 2007) : 190–95. http://dx.doi.org/10.1007/bf03227390.

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Kimura, Yousuke, Yasuharu Ohgoe, Kenji Hirakuri, Keisuke Sato, Naoki Fukata et Yasuhiro Fukui. « 405 Cytocompatibility of N-DLC/DLC multilayer films ». Proceedings of Ibaraki District Conference 2011.19 (2011) : 87–88. http://dx.doi.org/10.1299/jsmeibaraki.2011.19.87.

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Vengudusamy, Balasubramaniam, Jonathan H. Green, Gordon D. Lamb et Hugh A. Spikes. « Tribological properties of tribofilms formed from ZDDP in DLC/DLC and DLC/steel contacts ». Tribology International 44, n^o 2 (février 2011) : 165–74. http://dx.doi.org/10.1016/j.triboint.2010.10.023.

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Mannan, Abdul, M. F. M. Sabri, Md Abul Kalam et Masjuki H. Hassan. « Tribological performance of DLC/DLC and steel/DLC contacts in the presence of additivated oil ». International Journal of Surface Science and Engineering 12, n^o 1 (2018) : 60. http://dx.doi.org/10.1504/ijsurfse.2018.090055.

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Hassan, Masjuki H., Abdul Mannan, Md Abul Kalam et M. F. M. Sabri. « Tribological performance of DLC/DLC and steel/DLC contacts in the presence of additivated oil ». International Journal of Surface Science and Engineering 12, n^o 1 (2018) : 60. http://dx.doi.org/10.1504/ijsurfse.2018.10011258.

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Marachelian, A., M. H. Kang, K. Hwang, J. G. Villablanca, S. Groshen, K. K. Matthay, J. Maris, K. B. DeSantes, C. P. Reynolds et B. J. Maurer. « Phase I study of fenretinide (4-HPR) oral powder in patients with recurrent or resistant neuroblastoma : New Approaches to Neuroblastoma Therapy (NANT) Consortium trial ». Journal of Clinical Oncology 27, n^o 15_suppl (20 mai 2009) : 10009. http://dx.doi.org/10.1200/jco.2009.27.15_suppl.10009.

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10009 Background: Fenretinide (4-HPR), a cytotoxic retinoid, achieved limited and variable plasma levels when tested in a corn oil-based capsule. 4HPR/Lym-X-Sorb (LXS) oral powder is a new formulation intended to increase bioavailability, especially in children. Methods: This trial sought to define the toxicities, dose limiting toxicities (DLTs), maximum tolerated dose (MTD), and pharmacokinetics of 4-HPR/LXS oral powder when given mixed in Slim-Fast nutritional shakes, twice a day for 7 days, every 21 days. Eligible patients had high-risk neuroblastoma with recurrent/progressive disease, or disease refractory or persistent after frontline therapy. Dose escalation was in 30% increments using the traditional 3 + 3 design. Plasma levels were measured by HPLC. Results: Thirty-two patients accrued to 8 Dose Levels (DL) (352 –2210 mg/m2/day); 30 patients were evaluable. No MTD was identified. There was a DLT elevation of alkaline phosphatase on DL1. No other DLT's were observed. Other toxicities included dry skin, elevated triglycerides, reversible nyctalopia, and transient transaminase elevation. Course 1 day 7 peak 4HPR plasma levels (Dose (mg/m2/day) - mean, (range)) were: 352 –6 μM (3.8–9.6); 458–11.5 μM (9.7–14.9); 595–17.6 μM (6–24.3); 774–15 μM (9.1–25.3); 1006–6.7 μM (5.2–9.2); 1308–13.9 μM (2.9–23.8); 1700–19.7 μM (17.3–24.3); and 2210–10.8 μM (4–16.5). Course 2 day 7 peak plasma levels trended higher than course 1 at DL5–8. Three patients with isolated bone marrow disease and one with MIBG avid bone lesions, had complete responses (DL4, DL4, DL7, DL8) receiving 10, 17, 18 and 10 courses of therapy, respectively. Six patients had stable disease for 4–27 courses (median 5.5) (DL3, DL4, DL4, DL5, DL6, DL8). Twenty patients had progressive disease. Central review of responses is pending. Conclusions: 4-HPR/LXS oral powder was well tolerated, obtained 2 - 5 fold higher 4HPR plasma levels than fenretinide capsules on the same dose and schedule (P < 0.01), and showed anti-tumor activity (complete responses in 4/15 patients at DL4–8). Based on pharmacokinetic data, a recommended Phase II dose and schedule is 1700 mg/m2/day × 7days every 3 weeks. No significant financial relationships to disclose.

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Thèses sur le sujet "DLC"

1

Li, Jingyun. « Lapped transforms based on DLS and DLC basis functions and applications ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ30101.pdf.

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Wong, Chun-ming, et 黃俊銘. « Characterization of novel tumor suppressor genes, DLC-1 and DLC-2, in hepatocellular carcinoma ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B27768533.

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Graupner, Karola. « Untersuchungen zur Hochrateabscheidung harter DLC-Schichten ». [S.l. : s.n.], 2005. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB11679790.

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Salgueiredo, Ermelinda da Conceição Portela. « Filmes de DLC para aplicações biotribológicas ». Master's thesis, Universidade de Aveiro, 2007. http://hdl.handle.net/10773/2248.

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Mestrado em Engenharia Biomédica - Biomateriais
Os filmes de carbono amorfo tipo diamante (DLC) actuam como lubrificantes sólidos em muitas aplicações de desgaste incluindo os implantes articulares da anca e joelho. Entre estes, os filmes de carbono não-hidrogenado podem ser depositados pela técnica de deposição física em fase vapor (PVD) a baixas temperaturas (<325ºC). Estes filmes protectores são quimicamente inertes, possuem elevada dureza e baixo coeficiente de atrito contra polietileno de ultra alto peso molecular (UHMWPE) e outros biomateriais, aumentando assim a qualidade dos implantes articulares. Filmes de DLC foram depositados por sputtering DC em substratos à base de nitreto de silício (Si3N4 monolítico; compósitos Si3N4/TiN e Si3N4/bioglass) visando elevados níveis de adesão. A nanoestrutura do DLC, confirmada pela fraca intensidade da banda D do espectro Raman, combinada com o elevado conteúdo de ligações sp3, comprovado pelo desvio da banda G, levou a um valor de dureza de 16 GPa. Os filmes apresentam-se densos e homogéneos com um valor extremamente baixo de rugosidade (RMS=2.6 nm). Antes de ser implantado no corpo humano, um material tem de provar ser biocompatível. Antes da deposição de DLC, os substratos foram recobertos com uma camada de Si para promover a adesão. Após 35 dias de imersão em SBF, a observação SEM demonstrou que não ocorreu formação de camada apatítica na superfície. A análise química por ICP-AES mostrou que não houve variação na concentração dos iões Ca e P, e que não foram libertados elementos tóxicos na solução. A hidrofobicidade, tensão superficial e carga superficial deste biomaterial foram também avaliadas. A superfície apresentou um valor ligeiramente negativo de carga, como demonstrado pelo valor do potencial zeta de -35.0 ± 1.3 mV para pH=7.4 ± 0.2. A tensão superficial foi de 45.7 mN/m, apresentando uma componente dispersiva predominante da tensão superficial. Os resultados mostram que o revestimento de DLC é tendencialmente hidrofóbico. Os estudos com a linha celular de osteoblastos humanos MG63 não revelaram indícios de citotoxicidade. As células apresentaram morfologia normal e maior crescimento celular, quando comparadas com as placas standard de cultura, mostrando, no entanto, menor adesão celular. Para os ensaios biotribológicos, bolas e discos cerâmicos foram recobertos com filmes de DLC numa primeira etapa para ensaios de deslizamento a seco em movimento recíproco, com pares próprios. Um bias negativo foi aplicado ao compósito condutor Si3N4/TiN, resultando em valores de coeficiente de atrito extremamente baixos(μ=0.015). Numa segunda etapa, placas recobertas com DLC foram testadas contra bolas de UHMWPE. Os testes foram efectuados a seco e lubrificado (SBF). Os resultados preliminares mostram que o coeficiente de atrito mantém-se constante ao longo do ensaio, sem delaminação do DLC. Estes resultados favoráveis permitem recomendar o Si3N4 revestido com DLC como adequado para aplicações em próteses articulares. ABSTRACT: Diamond-like carbon (DLC) films act as solid-film lubricants in many wear resistant applications including articulated implants as hip and knee joints. Among these, non-hydrogenated amorphous carbon films can be grown by Physical Vapour Deposition (PVD) technique at low deposition temperatures (<325ºC). These protective coatings possess chemical inertness, high hardness and low friction coefficient against Ultra High Molecular Weight Polyethylene (UHMWPE) and other biomaterials, thereby improving the quality of articulated implants. In this study, the DLC films were deposited by DC magnetron sputtering over silicon nitride based substrates (bulk Si3N4; Si3N4/TiN and Si3N4/bioglass composites) aiming high adhesion levels. DLC nanostructure, confirmed by the weak intensity of the Raman spectra D band position, combined with significant sp3 content, as depicted by the G band downshift, lead to a hardness value of about 16 GPa. Films are dense and homogeneous in all the deposited area with an extremely low roughness of 2.6 nm (RMS). Before implantation in the human body, a material must prove to be biocompatible. Prior to the DLC deposition, the Si3N4 based ceramics were coated with a Si interlayer to promote adhesion. After 35 days of immersion in Simulated Body Fluid, SBF, the DLC surface showed no signs of apatite layer formation, as observed by SEM. Also, ICP-AES analysis confirmed no variation of the Ca and P ions concentration levels, and no toxic elements released into solution were detected. Hydrophobicity, surface tension and surface charge was also evaluated. The DLC surface is slightly negative charged, has shown by the zeta potential value of -35.0 ± 1.3 mV at pH=7.4 ± 0.2. The surface tension of the DLC coated samples was 45.7mN/m, presenting a dominant dispersive component of the surface tension. Results showed that the DLC coating is quite hydrophobic. Using the MG63 osteoblast-like cells, no evidence of citotoxicity was observed. Cells showed normal morphology and higher cell growth, compared to standard culture plates, although with low cell adhesion. For biotribological assessment, in a first stage Si3N4 ceramic balls and discs were coated with DLC films for self-mated reciprocating dry sliding tests. A negative bias voltage applied to a conductive Si3N4/TiN composite showed a remarkable improvement under the same tribological solicitation, presenting very low friction coefficient values (μ=0.015) during the full duration of the test. In a second stage, DLC-coated Si3N4 ceramics were tested against UHMWPE spheres using a reciprocating ball-on-flat set-up. The sliding occurred under dry and lubricated (SBF) conditions. Preliminary results showed that the friction coefficient is almost constant during the running-in period without delamination of the DLC coating. Based in these favourable results, the DLC-coated Si3N4 biomaterial seems adequate to be used for articular prosthesis development.

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Rudolf, Miroslav. « Depozice a analýza tenkých vrstev DLC ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228535.

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Diplomová práce nastiňuje problémy spojené s výrobou a analýzou tenkých vrstev DLC:H. Tyto vrstvy jsou ve středu zájmu mnoha vědeckých pracovníků již po několik desetiletí. V současné době existuje mnoho technik pro přípravu a analýzu. Příprava DLC vrstev má zásadní vliv na jejich vlastnosti a možnosti použití. Je zde mnoho kritérií jak vrstvy posuzovat. V této práci jsou studovány vlastnosti DLC:H vrstev připravených na substrát krystalického křemíku metodou RF-PECVD a následně jsou studovány mechanické, tribologické a optické vlastnosti. Jsou zde využity techniky jako XPS, Ramanova spektroskopie, reflektometrie, měření tvrdosti a adheze. Část práce se zabývá modelováním DLC z prvních principů. Pro tento účel je využito prvoprincipiálního programu Abinit který je šířen pod GPL. Je studována otázka přípravy vstupních dat s ohledem na konvergenci výsledků. Pozornost je také věnována výpočtu vibračních spekter ve středu Brillouinovy zóny ( bod) a celkové hustotě elektronových stavů clusteru DLC v supercele tvaru krychle. Tyto výsledky mohou být porovnány s experimentálně získanými daty z Ramanovy spektroskopie, respektive z XPS spektra valenčního pásu

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Marek, Mojmír. « Optimalizace distribučních cest - DLC Napajedla, a.s ». Master's thesis, Vysoká škola ekonomická v Praze, 2008. http://www.nusl.cz/ntk/nusl-2882.

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Práce má za úkol nastínit možné směry optimalizace rozvrhu distribučních cest. Nástrojem je vhodně konstruovaný model, který se stane součástí aplikace. Aplikace vychází z programů MS Excel a LINGO. Zadání a následné řešení práce má podobu projektu. Předmětem není pouze vytvořit statický model (aplikaci). Práce také vychází z připomínek a požadavků zadavatele.

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Vengudusamy, Balasubramaniam. « Behaviour of lubricant additives on DLC coatings ». Thesis, Imperial College London, 2011. http://hdl.handle.net/10044/1/11734.

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Non-ferrous surfaces such as diamond-like carbon (DLC) coatings are becoming potential candidates for automotive engine parts because of fuel economy gains that these surfaces offer by operating with very low friction. In recent years, a wide range of DLC coatings have been developed and it is important to understand their film-forming, friction reduction and wear resistance mechanisms under lubricated conditions. This aim of the work described in this thesis is to improve our understanding of the tribological behaviour of DLC coatings with different engine oil additives. The main focus of the thesis is to study a wide range of available DLC coating types with currently available and widely-used additives such as ZDDP, friction modifiers, MoDTC etc., in order to establish general rules of their tribological behaviour that will help lubricant manufacturers produce new oil formulations. The research shows that tribofilms are formed on all DLCs by most of the currently used additives and that the film thickness depends on various factors such as type of DLC coating, doping elements present in the coatings, concentration of hydrogen and tungsten present in the coatings and the counterpart. Hydrogen-free coatings (a-C and ta-C) give lower boundary friction compared to the other coatings whereas hydrogenated amorphous carbon (a-C:H) coatings give better wear resistance properties. Study of a-C:H:W coatings shows that the concentration of tungsten present in the coatings has a significant influence on wear resistance properties but negligible influence on the friction properties when additives are present. The steel/steel couple is known to form a thick ZDDP tribofilm. If one of the contact surfaces is coated with DLC, the tribofilm forming properties on the steel vary and, for some cases, the low boundary friction properties of DLCs are degraded.

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Silva, Cruz Ricardo Manuel Santos da. « TiBâ‚‚ ceramic and DLC multilayered PVD coatings ». Thesis, Cranfield University, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443347.

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Santos, da Silva Cruz Ricardo Manuel. « TiB2 ceramic and DLC multilayered PVD coatings ». Thesis, Cranfield University, 2007. http://dspace.lib.cranfield.ac.uk/handle/1826/1863.

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Titanium diboride (TiB2) has been investigated as a potential candidate for several industrial applications, such as: cutting tools, electric devices, wear parts and many more fields of application. The main drawback of TiB2 is its brittle nature, which has limited its range of applications. Diamond-like Carbon (DLC) has been used in industrial applications, mainly for wear resistant parts. However, the application of DLC films has been limited by the level of internal stress accumulated during deposition. This thesis investigates the deposition of TiB2/DLC multilayer wear resistant coatings to overcome these limitations. The thesis focuses on the tribological effects caused by different deposition techniques on TiB2 ceramic used by the coatings industry today, in order to overcome the brittle nature of TiB2 and the lack of adhesion of DLC films. The multilayer coatings consisted of 25 bi-layers of TiB2/DLC. These TiB2/DLC coatings were fabricated, maintaining a constant composition wavelength (sum of two layers Î» =200 nm) for an array of ceramic fractions ranging from 25% to 95% by volume using as substrates, tool steel AISI 1095 and powder metallurgy aluminium alloys, type 2618. The effect of the DLC content on the structure and performance (hardness, adhesion and wear) of the films was investigated. The bi-layer thickness influences the failure patterns observed in the scratch testing. These observations have been used to optimise the multilayered coating structure. Multilayer coatings have been manufactured to increase surface hardness and wear resistance as applied to a commercial powder metallurgy Al alloys (Al 2618) used in the automotive industry. Optimum coatings have found hardness values of 27.8 GPa, with a critical load of 20 N and a friction coefficient of 0.47. As a result of wear tests the multilayer with 10% of DLC was found to be best compromise between high hardness (23.8 GPa), good adhesion (critical load higher than 20 N), low friction and low wear rate.

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Manhabosco, Taíse Matte. « Tribocorrosão da liga Ti6A14V, liga nitretada, Ti6A14V revestida por filmes Diamond-Like Carbon (DLC) e obtenção eletroquímica de filmes DLC ». reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/16202.

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Na presente tese realizou-se um estudo a respeito da tribocorrosão, isto é, atuação simultânea dos mecanismos de desgaste e corrosão, da liga Ti6Al4V, da mesma liga nitretada e dela recoberta por filmes DLC obtidos por PACVD em meio fisiológico simulado, considerando que ligas de titânio são amplamente empregadas em próteses sujeitas a esforços e os filmes a base de carbono apresentam grande potencial como biomaterial. Paralelamente foi estudada a obtenção de filmes DLC sobre titânio através de uma técnica pouco usual para aquisição destes revestimentos, a eletrodeposição. As amostras nitretadas foram caracterizadas ao MEV, por difração de raios X e microdureza. Os filmes produzidos por PACVD foram caracterizados ao MEV, espectroscopia Raman e a dureza, através de nanoidentação. Para os diferentes materiais, ensaios eletroquímicos, em solução fisiológica simulada, foram realizados a fim de verificar a resistência à corrosão e ensaios de desgaste a seco, para avaliar o comportamento tribológico.O comportamento frente à tribocorrosão, onde os mecanismos de desgaste e de corrosão atuaram simultaneamente, foram realizados para a liga, liga nitretada e filmes DLC depositados por PACVC. A liga Ti6Al4V mostrou-se bastante resistente à corrosão, apesar do pobre comportamento tribológico. Ensaios de tribocorrosão confirmaram a boa resistência à corrosão da liga, mesmo com os mecanismos de desgaste e corrosão atuando simultaneamente. A camada de nitretos, obtida do processo de nitretação, apresentou melhora no comportamento tribológico, frente à corrosão e tribocorrosão. Filmes DLC apresentaram excelente resistência ao desgaste e à corrosão quando ensaios foram realizados separadamente. Ensaios de tribocorrosão mostraram a falha prematura do filme quando da atuação simultânea dos mecanismos. O estudo paralelo a respeito da eletrodeposição confirmou a possibilidade de obtenção de filmes DLC através desta técnica, a temperatura ambiente. Os filmes foram avaliados por espectroscopia Raman e testados quanto à resistência à corrosão e ao desgaste. A dureza dos filmes foi avaliada por nanoidentação e a morfologia, verificada ao MEV e AFM. Filmes obtidos a partir de acetonitrila apresentaram uma melhora na resistência à corrosão comparado ao titânio puro, enquanto que os filmes obtidos de DMF comportaram-se similarmente ao titânio, possivelmente pela presença de trincas nanométricas. Relativo à resistência ao desgaste, os filmes obtidos de DMF, mostraram-se mais eficazes.
In the present work it was performed a study about tribocorrosion performance of Ti6Al4V bare alloy and the same alloy Ti6Al4V nitrided or even recovered by DLC films in simulated physiologic environment considering the extensive application of this alloy in loaded implants and the possibility to use DLC films as a biomaterial. At the same time, it was studied the electrodepositon of DLC films onto titanium. Nitride samples were characterized by SEM (scanning electron microscopy), X ray diffraction and microhardness. The DLC films obtained by PACVC technique were characterized by SEM, Raman spectroscopy and nanoidentation. Corrosion experiments were conducted in simulated physiologic environment. The tribologic behavior was evaluated by dry wear tests. Tribocorrosion behavior, with corrosion and wear mechanisms acting simultaneously, was evaluated for the bare alloy, nitrided alloy and DLC films obtained by PACVD technique. The alloy is quite resistant to corrosion despite its poor tribological behavior. Tribocorrosion tests confirmed the good resistance to corrosion even when the degradation mechanisms of wear and corrosion act simultaneously. The nitride compound layer improved the tribological, corrosion and tribocorrosion behavior. DLC films presented high performance to either corrosion or wear mechanisms, however a catastrophic failure of the coating was observed in tribocorrosion tests. A parallel study confirmed the possibility of obtaining DLC films by a electrodeposition technique at room temperature. Raman measurements, corrosion and wear tests were performed. The hardness of the films was evaluated by nanoidentation. Films obtained from acetonitrile present a better corrosion resistance with respect to pure titanium. Films obtained from DMF presented a similar corrosion behavior as presented by titanium probably due the presence of some detected nanocracks. The films obtained from DMF presented a better tribological behavior.

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Livres sur le sujet "DLC"

1

(Firm), BradyGames, dir. Fable II : DLC mini-guide. Indianapolis, IN : BradyGames, 2009.

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Walsh, Doug. Fable II : DLC mini-guide. Indianapolis, IN : BradyGames, 2009.

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Crawford, Richard I. Novel routes to DLC and related wear coatings. [S.l : The Author], 1998.

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4

DLC-1,000+ : Delicious low cholesterol-1,000 calories or more. [S.l.] : ARCHWAY PUBLISHING, 2014.

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5

Miyoshi, Kazuhisa. CVD diamond, DLC, and c-BN coatings for solid film lubrication. [Cleveland, Ohio] : National Aeronautics and Space Administration, Lewis Research Center, 1998.

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Miyoshi, Kazuhisa. CVD diamond, DLC, and c-BN coatings for solid film lubrication. [Cleveland, Ohio] : National Aeronautics and Space Administration, Lewis Research Center, 1998.

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G, Isaac Martinez. Conductivity and hall effect in diamond-like carbon (DLC) thin films. Ottawa : National Library of Canada, 2003.

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Russia) Obshcherossiĭskiĭ seminar po diodnoĭ lazernoĭ spektroskopii im. A.M. Prokhorova (17th 2012 Moscow. 17-yĭ obshcherossiĭskiĭ seminar po diodnoĭ lazernoĭ spektroskopii im. A.M. Prokhorova (DLC-17), Moskva, 28 marta 2012 = The 17th A.M. Prokhorov All-Russian seminar on tunable diode laser spectroscopy (TDLS-17), Moscow, 28 March 2012. Moskva : [publisher not identified], 2012.

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United States. Supreme Court. Synopsis of Supreme Court and D.C. Circuit regulatory law opinions, Oct. 1991-Dec. 2004. Washington, D.C : E.E. Bruce, 2005.

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R, Smith Paul. De Haviland Canada DHC-6, DHC-7, DHC-8. London : Jane's Transport Press, 1987.

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Plus de sources

Chapitres de livres sur le sujet "DLC"

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Lo Bianco, Joseph. « Quo Vadis, DLC ? » Dans Dominant Language Constellations, 261–75. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52336-7_13.

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Ivanov-Omskii, V. I. « Copper Nanoclusters in DLC ». Dans Diamond Based Composites, 171–89. Dordrecht : Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5592-2_13.

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Argus, Don, et Danny Samson. « Attachment 1 : BHP DLC ». Dans Strategic Leadership for Business Value Creation, 443–57. Singapore : Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9430-4_18.

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van der Kolk, G. J. « Wear Resistance of Amorphous DLC and Metal Containing DLC in Industrial Applications ». Dans Tribology of Diamond-Like Carbon Films, 484–93. Boston, MA : Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-49891-1_19.

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Paosawatyanyong, B., K. Honglertsakul et D. K. Reinhard. « DLC-Film Schottky Barrier Diodes ». Dans Solid State Phenomena, 75–80. Stafa : Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/3-908451-12-4.75.

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Monteiro, O. R., et M. P. Delplancke-Ogletree. « Vacuum Arc Deposited DLC Based Coatings ». Dans Emerging Applications of Vacuum-Arc-Produced Plasma, Ion and Electron Beams, 197–203. Dordrecht : Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0277-6_19.

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Shishiyanu, S. T., T. S. Shishiyanu, P. S. Stefanov et V. K. Gueorguiev. « DLC Thin Films for Cardiovascular Stents ». Dans IFMBE Proceedings, 198–200. Berlin, Heidelberg : Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-34197-7_52.

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Lohner, Thomas, Martin Ebner, Andreas Ziegltrum, Karsten Stahl, Kirsten Bobzin, Tobias Brögelmann, Christian Kalscheuer et Matthias Thiex. « Reduzierung der Flüssigkeitsreibung durch DLC‑Beschichtungen ». Dans Proceedings, 141–56. Wiesbaden : Springer Fachmedien Wiesbaden, 2019. http://dx.doi.org/10.1007/978-3-658-25302-8_9.

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Bhatia, Charanjit Singh, Ehsan Rismani-Yazdi, Sujeet K. Sinha et Aaron James Danner. « Applications of DLC in Magnetic Recording ». Dans Encyclopedia of Tribology, 86–95. Boston, MA : Springer US, 2013. http://dx.doi.org/10.1007/978-0-387-92897-5_992.

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Adachi, Sadao. « a-Diamond-Like Carbon (a-DLC) ». Dans Optical Constants of Crystalline and Amorphous Semiconductors, 659–62. Boston, MA : Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-5247-5_62.

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Actes de conférences sur le sujet "DLC"

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Tani, Hiroshi, Renguo Lu, Shinji Koganezawa et Norio Tagawa. « Investigation of Smear Formation Mechanism From DLC Film by Heating ». Dans ASME 2020 29th Conference on Information Storage and Processing Systems. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/isps2020-1902.

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Abstract The formation of head smear from DLC films on magnetic disks was confirmed by a simulated heating experiment. DLC films of 100-nm thickness were prepared and heated on a hot plate in an environmental gas chamber. Smear on a silicon wafer placed 3 mm above the DLC surface was observed after heating of the DLC film. The smear amount was quantified using the carbon intensity of the smear measured by XPS. In air, the carbon concentration decreased with the heating temperature; however, the carbon concentration increased with temperature in nitrogen. The carbon concentration of the smear in the air environment was smaller than that of nitrogen. As the result of comparison of smears on DLCs with various hydrogen concentrations, more decomposed gas is generated from the DLC film as the amount of hydrogen contained in the DLC increases, and this value increases at lower temperatures. This result suggests that DLC films with low hydrogen concentrations generate a smaller amount of decomposition gas than those with high hydrogen concentrations during heating. In addition, Raman spectra suggest that the DLC degraded by heating and the hydrocarbon gas-like materials were generated from the DLC film because the DLC films include carbon and hydrogen. Because fragments of 250–500 atomic mass units were observed in the TOF-SIMS spectra of smears, the smear is estimated to consist of a hydrocarbon of relatively high molecular weight.

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Chu, Chi-Min, Tai-Lang Jong et Yue-Wei Huang. « Mitigating DLC Constraints of Air-conditioning Loads Using a group-DLC Method ». Dans 2007 IEEE Power Engineering Society General Meeting. IEEE, 2007. http://dx.doi.org/10.1109/pes.2007.385626.

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Yanagisawa, M., M. Kunimoto et T. Homma. « Chemical Analysis of Ultra-Thin DLC Films and Lubricant/DLC Interface Using Plasmonic Sensors ». Dans ASME 2014 Conference on Information Storage and Processing Systems. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/isps2014-6908.

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The technical potential of a new plasmonic sensor, which can acquire surface-enhanced Raman spectra with high sensitivity by controlling surface plasmons is demonstrated for the chemical analysis of diamond-like carbon (DLC) films, lubricant films, and the DLC/lubricant interface on magnetic disks of sub-nanometer scale. The Raman spectra of thin DLC films and lubricated DLC carbon can be acquired with a high S/N ratio. Raman spectra of lubricated DLC carbon can also be acquired with the high S/N ratio. The wavenumber shift and intensity change of the Raman peaks of the phenyl and hydroxyl groups in the mixed lubricants (ADOH and Z-tetraol) show that the chemical interaction with the DLC surfaces of the phenyl group in the lubricant molecule decreases with increasing nitrogen content, whereas that of the hydroxyl group with the nitrogenated carbon increases. Raman spectra of nitrogenated DLC films are also acquired, the peaks show good agreement with density functional theory calculations. The calculated bonding energy indicates that the hydroxyl groups interact with the nitrogenated carbon.

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Serbezov, V., N. Reifart et F. Herbst. « DLC films for stent applications ». Dans 2009 3rd ICTON Mediterranean Winter Conference (ICTON-MW 2009). IEEE, 2009. http://dx.doi.org/10.1109/ictonmw.2009.5385606.

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Ward, Christopher, et Cheong H. Choi. « The LAMS-DLC ARQ protocol ». Dans the conference. New York, New York, USA : ACM Press, 1991. http://dx.doi.org/10.1145/115992.116015.

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Zhang, Chuanwei, Le Gu et Dezhi Zheng. « Tribological Property Analyses of DLC Films on Ceramic Ball Surfaces With 3-D FEA Method and Experiments ». Dans ASME/STLE 2012 International Joint Tribology Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ijtc2012-61068.

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Diamond-like carbon (DLC) films are excellent candidates to improve tribological properties of silicon nitride (Si3N4) ceramic elements. Particular attentions have been paid to the preparation and analysis of DLC films on rings and discs. However, few researches on fabrication of DLC films on ball surfaces were carried out, especially on ceramic ball surfaces, because it is hard to achieve uniform coatings on ball surfaces. In this paper, DLC films on ceramic ball surfaces were studied with both experiment and FEA method. DLC films were deposited on Si3N4 ceramic ball and disc surfaces with plasma immersion ion implantation and deposition techniques (PIII-D). Surface topography of ceramic balls before and after coated with DLC films showed that DLC films on ceramic ball surfaces were uniform. Tribological tests under dry friction were conducted with a ceramic ball sliding against ceramic disc and, alternatively, one of the two surfaces was coated with DLC films. The tests demonstrated that DLC films on disc surfaces were worn, while ball surface films were partly flaked. 3-D FEA models of ceramic ball sliding against ceramic disc were built and the ceramic ball/disc was coated with DLC films alternatively. DLC films were supposed to be bonded with ceramic substrates. The FEA stress fields in DLC films and on film/substrate interface showed that DLC films had great effects on stress distribution due to the low frictional coefficient and material difference from substrates. The friction force caused an increment of the stress near surfaces during sliding process, and the material difference leaded to discontinuous stress distribution on film/substrate interface. The shear stress on film/substrate interface was very slightly different between DLC films coated on ceramic balls and discs. Under almost the same shear stress, the flakes and wear of DLC films were mainly determined on the adherence of DLC films to ceramic substrates.

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Topolovec-Miklozic, Ksenija, T. Reg Forbus, Frances Lockwood et Hugh Spikes. « Behaviour of Boundary Lubricating Additives on DLC Coatings ». Dans ASME/STLE 2007 International Joint Tribology Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ijtc2007-44485.

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The friction properties of a range of boundary lubricating additives in DLC-DLC sliding-rolling, lubricated contact have been investigated. Two types of DLC have been studied, one hydrogenated diamond-like and the other a non-hydrogenated graphitic type. The graphitic-type DLC coating gave initially very low boundary friction with additive-free base oil but after a few minutes of rubbing in thin film conditions this rose to the higher value produced immediately by the diamond-like DLC. With the graphitic-type DLC, ZDDP formed a thin patchy film while MoDTC produced a marked reduction of friction. Lateral force microscopy showed that the latter resulted from the formation of low friction material on the asperity peaks. Some organic friction modifiers preserved the low friction of g-DLC during prolonged rubbing. MoDTC and ZDDP were also effective in reducing friction on diamond-like DLC.

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Baker, C. C., A. A. Voevodin et J. S. Zabinski. « Comparison of WC/DLC/WS2 and YSZ/Au/DLC/MoS2 “Chameleon” Coatings for Tribological Applications ». Dans World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63570.

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Chameleon coatings are nanocomposite systems that adapt their tribological performance to changes in environmental conditions such as humidity and temperature. In this research we have investigated the tribological properties of two nanocomposite “chameleon” coatings and compared their properties. The two material systems of interest included: (i) Diamond like carbon (DLC) matrix with nanocrystalline WC and WS2 inclusions, and (ii) Yttrium Stabilized Zirconia (YSZ) in an Au matrix with DLC and MoS2 nanoparticle inclusions. The coating design approach included formation of nanocrystalline hard carbide or oxide particles for wear resistance, embedding them into an amorphous matrix for toughness enhancement, and inclusion of nanocrystalline and/or amorphous solid lubricants for friction adaptation to different environments. The coatings were produced using a combination of laser ablation and magnetron sputtering. Chemical and structural analysis of the coatings included x-ray photoelectron spectroscopy, x-ray diffraction, transmission electron microscopy, and micro-Raman spectroscopy. Mechanical properties such as coating hardness and toughness were investigated using nanoindentation, scratch, and indentation adhesion tests. It was observed that both YSZ and WC are valuable in enhancing film toughness. The chemical analysis was used to ascertain a correlation between chemical bonding of species and frictional properties. Friction measurements were studied by cycling between humid air and dry nitrogen conditions. The graphitic carbon component imparted low friction in humid air, MoS2 and WS2 were excellent for dry N2 conditions, and Au was valuable for low friction at elevated temperatures. The direct comparison among coatings demonstrates that similar “chameleon” behavior can be achieved with different material systems, validating the universal nature of the design approach.

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Narayan, R. J. « Novel Nanostructural Biomaterial Composites ». Dans ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39374.

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Hydrogen-free diamondlike carbon (DLC), with hardness values close to that of diamond, possess many desirable biocompatible properties for a variety of biomedical applications. The DLC coatings can be applied to joints prostheses, heart valves, and other medical devices. Unfortunately, hydrogen-free DLC coatings have a large compressive stresses which result in poor adhesion and wear characteristics. In this paper, we present results on silver doping of DLC to alleviate internal stresses as well as create DLC-Ag nanocomposites where Ag is in the form of nanoparticles. The Ag nanoparticles are expected to impart antimicrobial properties by providing sources of electrons. In the second part of the paper, we have created DLC and nanotube composites where nanotubes grow normal to the surface. This novel architecture not only alleviates internal stresses, but DLC + Nanotube composites have enhanced hardness and unique antimicrobial properties. Finally, we discuss novel multilayer DLC and hydroxyapatite (HA) composite where HA and DLC films are deposited sequentially at room temperature. The HA films with composites close to that of bone is considered very desirable for biocompatibility and integration with base structures. We discuss novel processing, characterization, hardness and bioeompatible properties of all these composites in detail.

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Papke, B. L., et P. P. Parthasarathy. « Tribological Film Formation on Hydrogenated DLC/Steel Contacts From Fully Formulated Automotive Lubricants ». Dans ASME/STLE 2009 International Joint Tribology Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/ijtc2009-15157.

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Tribological film formation from fully-formulated synthetic automotive lubricants on hydrogenated DLC/steel contacts was compared with that on steel/steel contacts. Four DLC coatings containing various metal dopants (W and Si) were evaluated. Lubricants formulated with organic friction modifiers performed better on DLC/steel than on steel/steel in both sliding and rolling/sliding contacts (lower friction and wear). In contrast, lubricants formulated with MoDTC friction modifiers had higher sliding contact friction on DLC/steel than on steel/steel. No evidence was observed for tribological film formation on the DLC surfaces.

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Rapports d'organisations sur le sujet "DLC"

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Hamada, Takahiro, Yutaka Mabuchi, Makoto Kano, Yoshiteru Yasuda, Hiroki Hayasaka, Hiroyuki Izumi et Tomoyuki Koike. Development of DLC Valve Lifter. Warrendale, PA : SAE International, mai 2005. http://dx.doi.org/10.4271/2005-08-0003.

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Liu, Y., A. Erdemir et E. I. Meletis. Influence of environmental parameters on the frictional behavior of DLC coatings. Office of Scientific and Technical Information (OSTI), mai 1997. http://dx.doi.org/10.2172/634091.

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Walter, K. C., H. Kung et T. Levine. Characterization and performance of DLC films synthesized by plasma and ion beam techniques. Office of Scientific and Technical Information (OSTI), septembre 1994. http://dx.doi.org/10.2172/10182138.

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Ando, Junji, Toshiyuki Saito, Naoyuki Sakai, Toshifumi Sakai, Hajime Fukami, Kazuyuki Nakanishi, Hiroyuki Mori, Hideo Tachikawa et Toshihide Ohmori. Development of Compact, High Capacity 4WD Coupling With DLC-Si-Coated Electromagnetic Clutch. Warrendale, PA : SAE International, mai 2005. http://dx.doi.org/10.4271/2005-08-0033.

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Fountzoulas, Costas G., John D. Demaree, Louis C. Sengupta, James K. Hirvonen et Dimitar Dimitrov. Wear and Tribological Properties of Silicon-Containing Diamond-Like Carbon (Si-DLC) Coatings Synthesized with Nitrogen, Argon Plus Nitrogen, and Argon Ion Beams. Fort Belvoir, VA : Defense Technical Information Center, juin 1998. http://dx.doi.org/10.21236/ada347548.

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Flory, John. DLA Forward Stocking. Fort Belvoir, VA : Defense Technical Information Center, mai 2007. http://dx.doi.org/10.21236/ada468399.

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Zhao, Hao, Chunhao Liu, Yanlong Li et Xiaoyi Li. Prognostic factors for survival in differentiated thyroid cancer with pulmonary metastases : a protocol of systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, février 2022. http://dx.doi.org/10.37766/inplasy2022.2.0026.

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Pulmonary metastasis (PM) is the most common form of distance metastasis in differentiated thyroid cancer (DTC), which has a poor prognosis. However, the prognostic risk factors are not yet well identified and analyzed. This systematic review and meta-analysis aims to fill this blank though identifying and discussing survival prognostic risk factors systematically for DTC patients with PM. Pulmonary metastasis (PM) is the most common form of distance metastasis in differentiated thyroid cancer (DTC), which has a poor prognosis. However, the prognostic risk factors are not yet well identified and analyzed. This systematic review and metastases aims to fill this blank though identifying and discussing survival prognostic risk factors systematically of DTC patients with PM. Condition being studied: differentiated thyroid cancer with pulmonary metastases.

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Konstantinou, Theodora, Diala Haddad, Akhil Prasad, Ethan Wright, Konstantina Gkritza, Dionysios Aliprantis, Steven Pekarek et John E. Haddock. Feasibility Study and Design of In-Road Electric Vehicle Charging Technologies. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317353.

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Electric Roadways (ERs) or Dynamic Wireless Charging (DWC) lanes offer an alternative dynamic and wireless charging method that has the potential of giving electric vehicles (EV) limitless range while they are moving. Heavy-duty vehicles (HDVs) are expected to be early adopters of the DWC technology due to the higher benefits offered to these vehicles that are traveling on fixed routes. The goal of this project was to assess the feasibility of ERs in Indiana and design a test bed for in-road EV charging technologies. The most suitable locations for implementing DWC lanes were identified on interstates that are characterized by high truck traffic. Using I-65 S as a case study, it was found that DWC can be economically feasible for the developer and competitive for the EV owner at high and medium future projections of EV market penetration levels. However, the existing substations are unlikely to serve future DWC needs for HDVs. Thus, consideration should be given to substation expansion to support EVs as market penetration expands. Implementing the DWC technology on interstates and jointly with major pavement preservation activities is recommended. Large scale deployment can significantly reduce the high initial investment. Renewable energy resources (solar and wind) deployed in the vicinity of ERs can reduce the electricity costs and associated greenhouse gas emissions.

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Ovalle, Samuel, E. Viamontes et Tony Thomas. Optimization of DLP 3D Printed Ceramic Parts. Florida International University, octobre 2021. http://dx.doi.org/10.25148/mmeurs.009776.

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Digital Light Processing (DLP) 3D printing allows for the creation of parts with advanced engineering materials and geometries difficult to produce through conventional manufacturing techniques. Photosensitive resin monomers are activated with a UV-producing LCD screen to polymerize, layer by layer, forming the desired part. With the right mixture of photosensitive resin and advanced engineering powder material, useful engineering-grade parts can be produced. The Bison 1000 is a research-grade DLP printer that permits the user to change many parameters, in order to discover an optimal method for producing 3D parts of any material of interest. In this presentation, the process parameter optimization and their influence on the 3D printed parts through DLP technique will be discussed. The presentation is focused on developing 3D printable slurry, printing of complex ceramic lattice structures, as well as post heat treatment of these DLP-produced parts.

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Martin, Chris A., et Kaylee R. Colter. George "Doc" Cavalliere Park. Landscape Architecture Foundation, 2014. http://dx.doi.org/10.31353/cs0730.

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