Articles de revues : « DLC »

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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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Vengudusamy, Balasubramaniam, Riaz A. Mufti, Gordon D. Lamb, Jonathan H. Green et Hugh A. Spikes. « Friction properties of DLC/DLC contacts in base oil ». Tribology International 44, n^o 7-8 (juillet 2011) : 922–32. http://dx.doi.org/10.1016/j.triboint.2011.03.006.

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Vengudusamy, Balasubramaniam, Jonathan H. Green, Gordon D. Lamb et Hugh A. Spikes. « Durability of ZDDP Tribofilms Formed in DLC/DLC Contacts ». Tribology Letters 51, n^o 3 (17 juillet 2013) : 469–78. http://dx.doi.org/10.1007/s11249-013-0185-z.

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Bewilogua, K., R. Wittorf, H. Thomsen et M. Weber. « DLC based coatings prepared by reactive d.c. magnetron sputtering ». Thin Solid Films 447-448 (janvier 2004) : 142–47. http://dx.doi.org/10.1016/s0040-6090(03)01088-5.

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Yin, Peng, Wen Zhou, Xin Zhang, Bin Guo et Panxin Li. « Bio-Based Thermoplastic Starch Composites Reinforced by Dialdehyde Lignocellulose ». Molecules 25, n^o 14 (16 juillet 2020) : 3236. http://dx.doi.org/10.3390/molecules25143236.

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In order to improve the mechanical properties and water resistance of thermoplastic starch (TPS), a novel reinforcement of dialdehyde lignocellulose (DLC) was prepared via the oxidation of lignocellulose (LC) using sodium periodate. Then, the DLC-reinforced TPS composites were prepared by an extrusion and injection process using glycerol as a plasticizer. The DLC and LC were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and the effects of DLC content on the properties of the DLC/TPS composites were investigated via the evaluation of SEM images, mechanical properties, thermal stability, and contact angles. XRD showed that the crystallinity of the DLC decreased due to oxidation damage to the LC. SEM showed good dispersion of the DLC in the continuous TPS phase at low amounts of DLC, which related to good mechanical properties. The tensile strength of the DLC/TPS composite reached a maximum at a DLC content of 3 wt.%, while the elongation at break of the DLC/TPS composites increased with increasing DLC content. The DLC/TPS composites had better thermal stability than the neat TPS. As the DLC content increased, the water resistance first increased, then decreased. The highest tensile strength and elongation at break reached 5.26 MPa and 111.25%, respectively, and the highest contact angle was about 90.7°.

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Xiao, Li, Yingqiang Xu et Zhiyong Chen. « Fretting tribological performance of DLC, TiAlN and DLC/TiAlN coatings deposited on carburized 18CrNi4A steel ». Surface Topography : Metrology and Properties 10, n^o 1 (21 janvier 2022) : 015009. http://dx.doi.org/10.1088/2051-672x/ac4ab8.

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Abstract To improve the fretting wear performance of 18CrNi4A steel, DLC, TiAlN and DLC/TiAlN coatings were deposited on the surface of carburized 18CrNi4A steel, respectively. The microstructure morphologies, chemical compositions, and mechanical properties of these coatings were evaluated. The fretting tribological properties of pad/flat contact pairs for carburized 18CrNi4A steel, DLC, TiAlN and DLC/TiAlN coatings were investigated in different lubricant environments including dry sliding and #RIPP 7254 aviation grease. The results show that DLC, TiAlN and DLC/TiAlN coatings deposited on the carburized 18CrNi4A steel surface can improve surface roughness, hardness, fracture toughness and resistance to plastic deformation. DLC, TiAlN and DLC/TiAlN coatings deposited on the surface of carburized 18CrNi4A steel can make the surface of the substrate have excellent fretting wear properties. DLC and DLC/TiAlN coatings have lower coefficient of friction and better fretting wear resistance than TiAlN coatings in dry sliding condition, and DLC/TiAlN coatings have the lowest wear rate in #RIPP 7254 grease lubrication condition. In addition, the wear mechanisms of carburized 18CrNi4A steel, DLC, TiAlN and DLC/TiAlN coatings in dry sliding and #RIPP 7254 aviation grease conditions were analyzed.

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CHENG, Y., Y. M. LU, Y. L. GUO, G. J. HUANG, S. Y. WANG et F. T. TIAN. « MULTILAYERS DIAMOND-LIKE CARBON FILM WITH GERMANIUM BUFFER LAYERS BY PULSED LASER DEPOSITION ». Surface Review and Letters 24, n^o 02 (30 janvier 2017) : 1750014. http://dx.doi.org/10.1142/s0218625x17500147.

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Multilayer diamond-like carbon film with germanium buffer layers, which was composed of several thick DLC layers and thin germanium island “layers” and named as Ge-DLC film, was prepared on the germanium substrate by ultraviolet laser. The Ge-DLC film had almost same surface roughness as the pure DLC film. Hardness of the Ge-DLC film was above 48.1[Formula: see text]GPa, which was almost the same as that of pure DLC film. Meanwhile, compared to the pure DLC film, the critical load of Ge-DLC film on the germanium substrate increased from 81.6[Formula: see text]mN to 143.8[Formula: see text]mN. Moreover, Ge-DLC film on germanium substrates had no change after fastness tests. The results showed that Ge-DLC film not only kept high hardness but also had higher critical load than that of pure DLC film. Therefore, it could be used as practical protective films.

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Sun, Jian, Wei Zhang, Zhi Qiang Fu, Cheng Biao Wang, Wen Yue, Zhi Jian Peng, Xiang Yu, Song Sheng Lin et Ming Jiang Dai. « Synergistic Effect of Cr-Doped DLC Coatings and Lubricant Additives ». Key Engineering Materials 492 (septembre 2011) : 155–59. http://dx.doi.org/10.4028/www.scientific.net/kem.492.155.

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The combination of diamond-like carbon (DLC) coatings and fluid lubrication is an efficacious method to improve the performance and service life of the friction-pairs working under the severe conditions, but the synergistic effect of DLC coatings and lubricant additives have not been clearly unveiled. The synergistic effect of Cr-doped DLC coatings with different Cr content and the lubricant additives of ZDDP, MoDTC, and T307 on the wear of DLC-coated stainless steel sample was studied, and it was found that the wear resistance of DLC-coated stainless steel sample can be further improve by the combination of DLC coatings and fluid lubrication; doping DLC coatings with Cr at an optimum level is beneficial for the wear resistance of DLC-coated stainless steel sample lubricated by PAO, PAO+ZDDP or PAO + MoDTC, but DLC coatings with a moderate Cr content is harmful to the wear resistance of DLC-coated stainless steel sample lubricated by PAO+T307. The synergistic effect of T307 and undoped DLC coatings or Cr-doped DLC coatings with a Cr content of 23.3 % is the best, while the three studied lubricant additives are harmful for the wear resistance of DLC coatings with a Cr content of 2.4 %.

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Brzezinka, Tomasz, Jeff Rao, Jose Paiva, Joern Kohlscheen, German Fox-Rabinovich, Stephen Veldhuis et Jose Endrino. « DLC and DLC-WS2 Coatings for Machining of Aluminium Alloys ». Coatings 9, n^o 3 (15 mars 2019) : 192. http://dx.doi.org/10.3390/coatings9030192.

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Machine-tool life is one limiting factor affecting productivity. The requirement for wear-resistant materials for cutting tools to increase their longevity is therefore critical. Titanium diboride (TiB2) coated cutting tools have been successfully employed for machining of AlSi alloys widely used in the automotive industry. This paper presents a methodological approach to improving the self-lubricating properties within the cutting zone of a tungsten carbide milling insert precoated with TiB2, thereby increasing the operational life of the tool. A unique hybrid Physical Vapor Deposition (PVD) system was used in this study, allowing diamond-like carbon (DLC) to be deposited by filtered cathodic vacuum arc (FCVA) while PVD magnetron sputtering was employed to deposit WS2. A series of ~100-nm monolayer DLC coatings were prepared at a negative bias voltage ranging between −50 and −200 V, along with multilayered DLC-WS2 coatings (total thickness ~500 nm) with varying number of layers (two to 24 in total). The wear rate of the coated milling inserts was investigated by measuring the flank wear during face milling of an Al-10Si. It was ascertained that employing monolayer DLC coating reduced the coated tool wear rate by ~85% compared to a TiB2 benchmark. Combining DLC with WS2 as a multilayered coating further improved tool life. The best tribological properties were found for a two-layer DLC-WS2 coating which decreased wear rate by ~75% compared to TiB2, with a measured coefficient of friction of 0.05.

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Miki, Hiroyuki, Takanori Takeno et Toshiyuki Takagi. « Tribological properties of multilayer DLC/W-DLC films on Si ». Thin Solid Films 516, n^o 16 (juin 2008) : 5414–18. http://dx.doi.org/10.1016/j.tsf.2007.07.113.

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Zhang Deheng, 张德恒, 徐照方 Xu Zhaofang et 李伯勋 Li Boxun. « Studay on Optical Property of DLC/Ag/DLC Multilayer Films ». Acta Optica Sinica 28, n^o 10 (2008) : 2031–35. http://dx.doi.org/10.3788/aos20082810.2031.

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Takeno, Takanori, Hiroyuki Miki, Toshifumi Sugawara, Yuhtaro Hoshi et Toshiyuki Takagi. « A DLC/W-DLC multilayered structure for strain sensing applications ». Diamond and Related Materials 17, n^o 4-5 (avril 2008) : 713–16. http://dx.doi.org/10.1016/j.diamond.2007.10.005.

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MANNAN, Abdul, Mohd Faizul Mohd SABRI, Md Abul KALAM et Haji Hassan MASJUKI. « Tribological Properties of Steel/Steel, Steel/DLC and DLC/DLC Contacts in the Presence of Biodegradable Oil ». Journal of the Japan Petroleum Institute 62, n^o 1 (1 janvier 2019) : 11–18. http://dx.doi.org/10.1627/jpi.62.11.

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Kameyama, Yutaka, A. Niwa et Jun Komotori. « Development of Diamond-Like Carbon (DLC) Coating Compatible Surface by Fine Particle Bombardment (FPB) ». Key Engineering Materials 353-358 (septembre 2007) : 1903–8. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.1903.

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To improve adhesion of DLC coatings, Fine Particle Bombardment (FPB) treatment using Cr based shot particles was performed. After the FPB treatment, DLC coating process was generated on the Chromium-molybdenum steel. The FPB treatment distributes diffused Cr elements onto the treated surface, creating a Cr-rich layer. The FPB treatment increases the surface hardness and roughness which also affect the adhesion of DLC coatings. Wear test was conducted to compare the tribological properties of the DLC coated FPB treated steels and that of the DLC coated non FPB treated ones. The DLC coated surface, after FPB treatment, kept low friction coefficient, while the DLC coated non FPB treated ones showed a sudden increase due to the delamination of DLC layer. These results imply that delamination of the DLC coating was suppressed by the Cr-rich surface layer created by the previous FPB treatment. Consequently, the applied method was effective to improve the adhesion of DLC coatings.

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Varman, Mahendra, Arslan Ahmed, Haji Hassan Masjuki, Md Abul kalam et N. W. M. Zulkifli. « Evaluation of Tribological Performance of Hydrogenated Dlc by Surface Texturing in the Presence of Palm Based Tmp Ester at Different Temperatures ». Academic Research Community publication 2, n^o 4 (1 janvier 2019) : 473. http://dx.doi.org/10.21625/archive.v2i4.390.

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Surface textured and DLC coated (hydrogenated amorphous carbon) samples were assessed for their coating performance at 40 oC, 80 oC and 125 oC. As a result, textured a-C:H DLC demonstrated higher but stable coefficient of friction (COF) at high temperatures as compared to un-textured DLC samples. However, textured DLC samples showed higher wear resistance compared to un-textured DLC coating. The enhancement can be elucidated by the lower graphitization of textured DLC samples.

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Takagi, Toshiyuki, Takanori Takeno et Hiroyuki Miki. « Metal-Containing Diamond-Like Carbon Coating as a Smart Sensor ». Materials Science Forum 638-642 (janvier 2010) : 2103–8. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.2103.

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A new type of smart sensor based on metal-containing diamond-like carbon (DLC) coatings is presented. DLC coatings are widely used as protective coatings to improve the surface properties of objective materials; for example, to increase hardness and chemical stability. With the addition of metal clusters into DLC coatings, electrical conduction appears to depend on the microstructure. Such coatings can be used in fabricating resistive sensors. In this paper, we present tungsten-containing DLC (W-DLC) as a possible strain sensor. The strain sensitivity is greatly affected by the deposition condition. We also fabricate a double-layered DLC/W-DLC coating. The double-layered structure is expected to be used as a smart coating having functionality as a sensor with a protective DLC overcoat.

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Sakurada, Yuichi, Mai Takashima, Toshiyuki Yasuhara, Yoshinao Iwamoto, Makoto Matsuo et Naoto Ohtake. « Detecting Method of Bulk Defects in DLC Films Using Light Scattering ». Key Engineering Materials 523-524 (novembre 2012) : 793–98. http://dx.doi.org/10.4028/www.scientific.net/kem.523-524.793.

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Diamond-like carbon (DLC) film has various micro-size defects like pinhole, void and particle. When DLC film is exposed to white light, light is scattered in all direction at defects in DLC film. In this paper, defects in DLC film are detected by observing scattering light from defects under dark-field microscope. DLC film has wavelength dependence of transmittance. Therefore, using its wavelength dependence allows to separate surface and inside defects of DLC film. This paper describes development of bulk defects detecting system using optical filtering and scattering light detecting. Bulk defects of DLC films were successfully separated into surface defects and inside defects. This detecting method of defect is nondestructive and easy, and applicable to DLC films as well as other coating films.

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Tsai, Pai-Yang, Hou-Kuei Huang, Chien-Min Sung, Ming-Chi Kan et Yeong-Her Wang. « Thermal Characteristics of InGaN/GaN Flip-Chip Light Emitting Diodes with Diamond-Like Carbon Heat-Spreading Layers ». International Journal of Photoenergy 2014 (2014) : 1–5. http://dx.doi.org/10.1155/2014/829284.

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The temperature-dependent optical, electrical, and thermal properties of flip-chip light emitting diodes (FCLEDs) with diamond-like carbon (DLC) heat-spreading layers were investigated. On the basis of the measured results in the 20°C to 100°C temperature range, a significant performance improvement can be achieved for FCLEDs with DLC heat-spreading layers (DLC-FCLED) compared with FCLEDs without DLC heat-spreading layers (non-DLC-FCLED). The external quantum efficiency (EQE) of the DLC-FCLED improves by 9% at an injection current of 1000 mA and a temperature of 100°C. The forward voltage and spectra variations are smaller than those of non-DLC-FCLEDs. The DLC-FCLED provides high efficiency and high stability performance for high-power and high-temperature applications.

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Shen, Bin, Liang Wang, Su Lin Chen et Fang Hong Sun. « Deposition and Tribological Properties of CVD Diamond/Diamond-Like Carbon Composite Films ». Advanced Materials Research 565 (septembre 2012) : 615–20. http://dx.doi.org/10.4028/www.scientific.net/amr.565.615.

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The CVD diamond/diamond-like carbon composite film is fabricated on the WC-Co substrate by depositing a layer of Diamond-like Carbon film on the surface of conventional Micro- or Nano-crystalline diamond film. The hot filament chemical vapor deposition (HFCVD) method and vacuum arc discharge with a graphite cathode are adopted respectively to deposit the MCD/NCD and DLC films. A variety of characterization techniques, including filed emission scanning electron microscope (FE-SEM) and Raman spectroscopy are employed to investigate the surface morphology and atomic bonding state of as-deposited MCD/DLC and NCD/DLC composite film. The results show that both MCD/DLC and NCD/DLC composite films present similar surface morphology with the MCD and NCD films, except for scattering a considerable amount of small-sized diamond crystallites among the grain boundary area. The atomic-bonding state of as-deposited MCD/DLC and NCD/DLC composite films is determined by the top-layered DLC film, which is mainly consisted of amorphous carbon phase and no discernible sp3 characteristic peak can be observed from their Raman spectrum. Furthermore, the tribological properties of as-deposited MCD/DLC and NCD/DLC composite films is examined using a ball-on-plate reciprocating friction tester under both dry sliding and water-lubricating conditions, comparing with conventional DLC, MCD and NCD films. Silicon nitride balls are used as counterpart materials. For the CVD diamond/DLC composite films, the self-lubricating effect of top-layered DLC film is beneficial for suppressing the initial friction peak, as well as shortening the run-in period. The average friction coefficients of MCD/DLC and NCD/DLC composite films during stable sliding period are 0.07 and 0.10 respectively in dry sliding; while under water-lubricating condition, they further decreases to 0.03 and 0.07.

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Ankha, Milagros del Valle El Abras, Alecsandro de Moura Silva, Renata Falchete do Prado, Maiara Penteado Camalionte, Luana Marotta Reis de Vasconcellos, Polyana Alves Radi, Argemiro Soares da Silva Sobrinho, Lucia Vieira et Yasmin Rodarte Carvalho. « Effect of DLC Films with and without Silver Nanoparticles Deposited On Titanium Alloy ». Brazilian Dental Journal 30, n^o 6 (novembre 2019) : 607–16. http://dx.doi.org/10.1590/0103-6440201902708.

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Abstract Diamond-like carbon (DLC) film is a biocompatible hard coating material that can prevent the leaching of metal ions. This study evaluates the structural characteristics of DLC, with and without silver nanoparticles, deposited by plasma (PECVD) on titanium alloy (Ti-6Al-4V) and bone formation in contact with DLC films. Sixty Ti-6Al-4V samples were used divided in: uncoated, coated with DLC and coated with DLC-Ag. After structural characterization, samples were fixed bilaterally at the rabbit's mandible. After 15 and 90 days, samples were characterized again and bone formation in the area was analyzed by histomorphometry. Statistical analysis was performed by two-way ANOVA. Both the DLC and DLC-Ag films were firmly adhered and showed a high electrical resistance without significant changes in the Raman spectrum after in vivo integration. After 15 days, there were immature bone trabeculae in the interface and partially covering the surface. After 90 days, mature bone filled the interface and coved the surface. There was no statistically significant difference among the three groups in both periods. In conclusion, osseointegration with DLC, DLC-Ag and uncoated Ti-6Al-4V is similar. However, DLC and DLC-Ag coverings have the advantage of electrical insulation and can presumably control bacterial activity and ion leaching.

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Gu, Kunming, Yi Zheng, Junxuan Luo, Xiande Qin, Xinge Yang, Nadeem Abbas et Jiaoning Tang. « Microstructure, mechanical and tribological properties of DLC/Cu-DLC/W-DLC composite films on SUS304 stainless steel substrates ». Materials Research Express 6, n^o 8 (3 mai 2019) : 086406. http://dx.doi.org/10.1088/2053-1591/ab197b.

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Zhang, Lijie, Xuemei Zong, Fei Guo, Bing He et Xiaoming Yuan. « Effect of Fluorine Incorporation on DLC Films Deposited by Pulsed Cathodic Arc Deposition on Nitrile Butadiene Rubber and Polyurethane Rubber Substrates ». Coatings 10, n^o 9 (13 septembre 2020) : 878. http://dx.doi.org/10.3390/coatings10090878.

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Diamond-like carbon (DLC) and fluorinated diamond-like carbon (F-DLC) films were deposited via pulsed cathodic arc deposition on pretreated nitrile butadiene rubber (NBR) and polyurethane (PU) rubber substrates. Both DLC and F-DLC films showed a more than 50% decrease in coefficients of friction compared to uncoated NBR and PU rubber substrates. The incorporation of fluorine was found to have little influence on the film coefficient of friction. However, a decrease in film wettability was overserved in the F-DLC films compared to the DLC films.

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Aizawa, Tatsuhiko, Kenji Wasa, Abdelrahman Farghali et Hiroshi Tamagaki. « Plasma Printing of Micro-Punch Assembly for Micro-Embossing of Aluminum Sheets ». Materials Science Forum 920 (avril 2018) : 161–66. http://dx.doi.org/10.4028/www.scientific.net/msf.920.161.

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This paper concerned with micro-embossing of micro-cavities and micro-grooves into aluminum sheets by CNC-stamping with use of the arrayed DLC multi-punches. Both SKD11 and AISI420 steel die substrates were prepared and DLC-coated with the thickness of 10 to 15 μm. This DLC coating worked as a punch material. The two dimensional micro-patterns were printed onto this DLC film by maskless lithography. The unprinted DLC films were removed by the plasma oxidation to leave the three dimensional DLC-punch array on the steel substrate. This micro-pillared and micro-grooved DLC-punches were placed into the cassette die set for micro-embossing process by using the table-top CNC stamper. The micro-circular patterns transformed to the micro-pillars in the DLC punch by the plasma oxidation. Through the CNC-micro-embossing, this micro-texture further transferred to micro-cavities in the aluminum sheet. The dimensional accuracy of embossed micro-textures by stamping was measured by SEM and three dimensional profilometer with comparison to the tailored micro-pattern and the DLC-punch array configuration.

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Liao, Yi-Chun, Lizhen Si, Ralph W. deVere White et Su Hao Lo. « The phosphotyrosine-independent interaction of DLC-1 and the SH2 domain of cten regulates focal adhesion localization and growth suppression activity of DLC-1 ». Journal of Cell Biology 176, n^o 1 (26 décembre 2006) : 43–49. http://dx.doi.org/10.1083/jcb.200608015.

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The tensin family member cten (C-terminal tensin like) is an Src homology 2 (SH2) and phosphotyrosine binding domain–containing focal adhesion molecule that may function as a tumor suppressor. However, the mechanism has not been well established. We report that cten binds to another tumor suppressor, deleted in liver cancer 1 (DLC-1), and the SH2 domain of cten is responsible for the interaction. Unexpectedly, the interaction between DLC-1 and the cten SH2 domain is independent of tyrosine phosphorylation of DLC-1. By site-directed mutagenesis, we have identified several amino acid residues on cten and DLC-1 that are essential for this interaction. Mutations on DLC-1 perturb the interaction with cten and disrupt the focal adhesion localization of DLC-1. Furthermore, these DLC-1 mutants have lost their tumor suppression activities. When these DLC-1 mutants were fused to a focal adhesion targeting sequence, their tumor suppression activities were significantly restored. These results provide a novel mechanism whereby the SH2 domain of cten-mediated focal adhesion localization of DLC-1 plays an essential role in its tumor suppression activity.

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Yatsuzuka, Mitsuyasu, Yoshihiro Oka, Akifumi Tomita, Noritaka Murata et Mitsuaki Hirota. « Wear Properties of DLC and Plasma Sprayed WC Structure Coating ». Solid State Phenomena 127 (septembre 2007) : 245–50. http://dx.doi.org/10.4028/www.scientific.net/ssp.127.245.

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Diamond-like carbon film (DLC) with an interlayer of plasma sprayed tungsten-carbide (WC) was prepared on an aluminum alloy substrate (A5052) by a hybrid process of plasma-based ion implantation and deposition using hydrocarbon gas. Typical thicknesses of DLC and WC films were 1 μm and 100 μm, respectively. The hardness and friction coefficient of DLC were typically 15 GPa and 0.15, respectively. The durability of DLC/WC/A5052 system was evaluated from the measurement of the friction coefficient by a ball-on-disk friction tester in which the loaded ball was drawn repeatedly across a sample and the load was increased with each traverse. For the DLC/A5052 system, which has no WC interlayer, the DLC film was broken quickly because of distortion of the substrate. For the DLC/WC/A5052 system, on the other hand, the DLC film was excellent in durability for long running. The wear rate of rubber rotor to the metal rotor was measured by a roller-pitching-type wear testing machine, showing large reduction in wear rate using DLC-coated metal rotor.

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Supadee, Laddawan, Santi Chatruprachewin, Chaba Suriya-Amaranont et Wisut Titiroongruang. « Corrosion Characterization of High Moment Magnetic Material Coated with Diamond-Like Carbon ». Advanced Materials Research 811 (septembre 2013) : 171–76. http://dx.doi.org/10.4028/www.scientific.net/amr.811.171.

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In order to increase data storage density of hard drive, DLC overcoat thickness was decreased to allow read/write head to come closer to magnetic alloy of the disk, andwith maintaining the main purpose of the overcoat to provide good corrosion and mechanical protection for the underlying magnetic recording film under unfavorably environmental conditions and occasional reactions. Base on that the edges of topography will be weak point for deposition films cause of shadow effect during the process, its hard that deposition atomic will stay at the concave and convex of topography. DLC coverage performance at the edge of 3D topography becomes high sensitive with limited DLC films thickness. Currently the 3D profile of magnetic material that needs to protect with DLC, is about 2 nanometers with subnanometres DLC thickness. The enormous of data shrew corrosion pattern was usually happened at the edge of topography. Thus, the accelerated test or indirect methodology was applied for DLC integrity. This investigation was explore the methodology to verify the weakness of DLC films especially at the topography edges which is difficult for any direct metrology tools can pursue. With pore resistance, which related to the film structure, the electrochemical impedance indicated that DLC/Si3N4 is a suitable choice to against corrosion. However topography surface influence to DLC coverage. Controllable surface for DLC deposition also needed well defined. Two types of step height was created as 1 nm and 2 nm on (100) silicon substrate. The 20Å DLC film thickness was deposited on the silicon substrate with promised technique, Filtered Cathodic Vacuum Arch (FCVA). After this process the aluminum (Al) was deposited on the surface of DLC film by using evaporation technique. The silicon substrate was driven to Al surface thro pin holes on the DLC film at 577OC. To detect the pin holes on the DLC film, the aluminum layer was removed by using wet etch chemical process. The SEM image indicates that the square pitting at the edge of DLC film obtained for 2nm step height was around 2nm depth. The latest experiment in this investigation to characterize 2.3 T magnetic moment material degradation with DLC/Si3N4 coating, was performed with electrochemical impedance spectroscopy and AFM. The material with DLC overcoat after exposed to H2SO4 for 30 min, polarization resistance was increased for 2 times from uncoated material. Alternative charge transfer capacitance was reduced as desirable charge current.

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Janchocktawee, Witit, Vishnu Rachpech et Jessada Wannasin. « Comparison of DLC and N-Doped DLC Synthesized by RF-PECVD ». Advanced Materials Research 893 (février 2014) : 528–32. http://dx.doi.org/10.4028/www.scientific.net/amr.893.528.

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Diamond-like carbon (DLC) films and nitrogen doped DLC (NDLC) were deposited on glass slide and H13 steel by plasma-enhanced chemical vapor deposition using a commercial RF 13.56 MHz (RF-PECVD). The films have been prepared from CH4for DLC and CH4+N2mixtures for NDLC. The deposition process was at 300°C under argon atmosphere for 120 min. Bonding energy and diamond like carbon characteristic of DLC and NDLC films have been characterized by Fourier Transform Infrared Spectroscopy (FTIR) and Raman spectroscopy. Thermalgravimetric Analyzer (TGA) was used to evaluate the thermal stability of the films which were scrapped off from a glass slide substrate. The mechanical properties was characterized, such as hardness by nanoindentation technique, scratch test by Rockwell diamond tip in progressive mode and friction coefficient have been measured in ambient air using a ball-on-disk tribometer.

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HARADA, Yoichi, Takashi MATUSOKA, Tomoko HIRAYAMA et Makoto ASANO. « Tribological Properties of Si-Doped and Ti-Doped DLC/DLC Slidings ». Journal of The Surface Finishing Society of Japan 63, n^o 1 (2012) : 29. http://dx.doi.org/10.4139/sfj.63.29.

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Takeno, Takanori, Takao Komiyama, Hiroyuki Miki, Toshiyuki Takagi et Takashi Aoyama. « XPS and TEM study of W-DLC/DLC double-layered film ». Thin Solid Films 517, n^o 17 (juillet 2009) : 5010–13. http://dx.doi.org/10.1016/j.tsf.2009.03.033.

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Yu, Xiang, Zi-jiang Yang, Sheng-ting Cai, Zhong-zhou Yang et Yi Ren. « Influence of parameters on Al/Ti-DLC/DLC selective absorber film ». Surface Engineering 33, n^o 11 (17 mars 2017) : 827–34. http://dx.doi.org/10.1080/02670844.2017.1301064.

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Rajak, Dipen Kumar, Ashwini Kumar, Ajit Behera et Pradeep L. Menezes. « Diamond-Like Carbon (DLC) Coatings : Classification, Properties, and Applications ». Applied Sciences 11, n^o 10 (13 mai 2021) : 4445. http://dx.doi.org/10.3390/app11104445.

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DLC coatings have attracted an enormous amount of interest for science and engineering applications. DLC occurs in several different kinds of amorphous carbon materials. Owing to the extensive diversity in their properties, DLC coatings find applications in mechanical, civil, aerospace, automobile, biomedical, marine, and several other manufacturing industries. The coating life of DLC is predominately influenced by its constituent elements and manufacturing techniques. Numerous researchers have performed multiple experiments to achieve a robust understanding of DLC coatings and their inherent capabilities to enhance the life of components. In this review, a wide range of DLC coatings and their classification, properties, and applications are presented. Their remarkable performance in various applications has made DLC coatings a promising alternative over traditional solitary-coating approaches.

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Xu, Lian, Bryan Ciccarelli, Evdoxia Hatjiharissi, Guang Yang, Yangsheng Zhou, Zachary Hunter, Jenny Sun et al. « Aberrant DNA Methylation and Transcriptional Silencing of DLC-1 in Waldenstrom's Macroglobulinemia. » Blood 114, n^o 22 (20 novembre 2009) : 2954. http://dx.doi.org/10.1182/blood.v114.22.2954.2954.

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Abstract Abstract 2954 Poster Board II-930 The deleted in liver cancer-1 (DLC-1) gene encodes a Rho GTPase activating protein (RhoGAP) with potential tumor-suppressor activity. Hypermethylation in the DLC-1 promoter is an aberrant epigenetic modification associated with transcriptional silencing of DLC-1 in various types of human cancers. To explore the epigenetic alteration of DLC-1 in Waldenström's macroglobulinemia (WM), we investigated the methylation status of the DLC-1 promoter and its correlation with DLC-1 mRNA expression in cell lines and primary WM patient samples. Initial analysis using methylation-specific PCR (MSP) showed that DLC-1 promoter was completely methylated in WM-WSU and partially methylated in BCWM.1. Using quantitative RT-PCR, DLC-1 mRNA expression was detectable in BCWM.1, but not WM-WSU. These results suggested a correlation between the DLC-1 methylation status and mRNA expression. Similarly, among multiple myeloma (MM) cell lines, we showed that RPMI and U266 exhibited complete methylation, whereas INA6 showed partial methylation, and no methylation was detectable in MM1S and MM1R cells. Similar in WM cells, DLC-1 methylation status was highly correlated with the mRNA expression in these MM cell lines. Of 37 WM patient samples examined, 24 (65%) exhibited methylation in the DLC-1 promoter. In contrast, no methylation of DLC-1 was observed in 4 healthy volunteers. The methylation status was further confirmed using bisulfite DNA sequencing in a subset of WM patients. Quantitative RT-PCR analysis showed that DLC-1 mRNA expression was significantly lower in WM patients compared to healthy volunteers (p=0.001). Treatment with demethylation agents azacytidine or 5-aza-deoxycytidine resulted in significant reactivation of DLC-1 transcription in the WM cell lines WM-WSU and BCWM.1. In addition, a synergistic induction of DLC-1 transcription was observed in the presence of azacytidine and the HDAC inhibitor Vorinostat in BCWM.1 and primary WM patient cells. Moreover, functional studies showed that overexpression of DLC-1 induced cell growth arrest and apoptosis in BCWM.1. DLC-1 methylation status was also correlated with serum sCD27 levels in WM patients (p=0.004), which is secreted by WM cells, serves as a marker of disease burden and facilitates CD40L directed paracrine stimulation by mast cells. Taken together, these results suggest that the down-regulation of DLC-1 via aberrant DNA methylation plays a role in the pathogenesis of WM, and represents a novel therapeutic target in the treatment of WM. Disclosures: No relevant conflicts of interest to declare.

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Wei, Q., J. Sankar, A. K. Sharma, S. Oktyabrsky, J. Narayan et R. J. Narayan. « Atomic structure, electrical properties, and infrared range optical properties of diamondlike carbon films containing foreign atoms prepared by pulsed laser deposition ». Journal of Materials Research 15, n^o 3 (mars 2000) : 633–41. http://dx.doi.org/10.1557/jmr.2000.0094.

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We investigated the atomic structure, electrical, and infrared range optical properties of diamondlike carbon (DLC) films containing alloy atoms (Cu, Ti, or Si) prepared by pulsed laser deposition. Radial distribution function (RDF) analysis of these films showed that they are largely sp3 bonded. Both pure DLC and DLC + Cu films form a Schottky barrier with the measuring probe, whereas DLC + Ti films behave like a linear resistor. Pure DLC films and those containing Cu exhibit p-type conduction, and those containing Ti and Si have n-type conduction. Photon-induced conduction is observed for pure DLC, and the mechanism is discussed in terms of low-density gap states of highly tetrahedral DLC. Our results are consistent with relative absence of gap states in pure DLC, in accordance with theoretical prediction by Drabold et al.37 Temperature dependence of conductivity of DLC + Cu shows a behavior σ ∞ exp(−B/T1/2), instead of the T−1/4 law (Mott–Davis law). Contributions from band-to-band transitions, free carriers, and phonons to the emissivity spectrum are clearly identified in pure DLC films. The amorphous state introduces a large contribution from localized states. Incorporation of a small amount of Si in the DLC does not change the general feature of emissivity spectrum but enhances the contribution from the localized states. Cu and Ti both enhance the free carrier and the localized state contributions and make the films a black body.

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Srisang, C., P. Asanithi, K. Siangchaew, S. Limsuwan, A. Pokaipisit et P. Limsuwan. « Raman Spectroscopy of DLC/a-Si Bilayer Film Prepared by Pulsed Filtered Cathodic Arc ». Journal of Nanomaterials 2012 (2012) : 1–5. http://dx.doi.org/10.1155/2012/745126.

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DLC/a-Si bilayer film was deposited on germanium substrate. The a-Si layer, a seed layer, was firstly deposited on the substrate using DC magnetron sputtering and DLC layer was then deposited on the a-Si layer using pulsed filtered cathodic arc method. The bilayer films were deposited with different DLC/a-Si thickness ratios, including 2/2, 2/6, 4/4, 6/2, and 9/6. The effect of DLC/a-Si thickness ratios on the sp3content of DLC was analyzed by Raman spectroscopy. The results show that a-Si layer has no effect on the structure of DLC film. Furthermore, the upper shift inGwavenumber and the decrease inID/IGinform that sp3content of the film is directly proportional to DLC thickness. The plot modified from the three-stage model informed that the structural characteristics of DLC/a-Si bilayer films are located close to the tetrahedral amorphous carbon. This information may be important for analyzing and developing bilayer protective films for future hard disk drive.

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Lan, Hui Qing, Can Liu et Takahisa Kato. « Simulations on Sliding Process between Si-DLC and DLC Films on a Water-Lubricated Condition ». Applied Mechanics and Materials 29-32 (août 2010) : 1408–13. http://dx.doi.org/10.4028/www.scientific.net/amm.29-32.1408.

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Diamond like carbon (DLC) films have been extensively studied over the past decades due to their unique combination of properties, in particular, silicon-doped DLC (Si-DLC) films are of significant interest for tribological effects, they had a very low friction coefficient and possess the potential to improve wear performance in humid atmospheres and at higher temperature. But many experimental results of the Si-DLC films showed that their tribological properties changed greatly on different silicon contents. In the paper, molecular dynamics (MD) simulations were used to study a sliding friction process between Si-DLC and DLC films on an un-lubricated and a water-lubricated condition respectively. The results have been shown that a transfer film between the Si-DLC and DLC films was formed on the un-lubricated condition. In contrast, a boundary lubrication layer was found on the water-lubricated condition. Moreover, the friction force on the un-lubricated condition was larger than those on the water-lubricated condition.

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Zeng, Qunfeng, et Zekun Ning. « High-temperature tribological properties of diamond-like carbon films : A review ». REVIEWS ON ADVANCED MATERIALS SCIENCE 60, n^o 1 (1 janvier 2021) : 276–92. http://dx.doi.org/10.1515/rams-2021-0028.

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Abstract The rapid development of aerospace industry has made more and more machinery parts of equipment working at high temperature. Due to the lubrication failure of lubricating oil and grease at high temperature, solid lubricant coatings are almost the only effective method to achieve super low friction at high temperature. In recent years, the tribological properties of diamond-like carbon (DLC) films have been extensively studied at high temperature. The present study reviews the microstructure of DLC films and the influence of doping different elements on the structure of DLC films. Second, the mechanical properties and thermal stability of pure DLC films and DLC doped with different elements are also described. DLC films have different microstructures and tribological properties by different preparation methods. Finally, the high-temperature lubrication failure mechanism of DLC films and the tribological properties of DLC films when doped with different elements are discussed from the macro and micro perspectives.

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CHEN GUANG-HUA, LU YANG-HUA et MA GUO-BIN. « THE STUDY OF THE D.C. CONDUCTIVITY PROPERTIES OF DLC FILMS ». Acta Physica Sinica 45, n^o 4 (1996) : 661. http://dx.doi.org/10.7498/aps.45.661.

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Singh, Shubham. « Using the DLC as the Tyre Material for the synthesis of Rubber & ; Ply ; Increasing Tyre’s Life ». International Journal of Scientific & ; Engineering Research 11, n^o 11 (25 novembre 2020) : 274–75. http://dx.doi.org/10.14299/ijser.2020.11.01.

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Review on using DLC in making tyres. DLC films have been used as protective coatings for various applications. We can use DLC to improve the tyre’s life especially for sports cars and supercars like Lamborghini and Bugatti Chiron. And also in military vehicles for making the tyres bulletproof. DLC is a class of amorphous carbon material that displays some of the typical properties of diamond. DLC is usually applied as coatings to other materials that could benefit from some of those properties but we can use DLC in the synthesis of tyre’s rubber (for making threads) and ply thus improving the overall quality of the tyres.

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Chen, Qing Yun, Kai Min Shih, Man Yi Duan et Lie Lin Wang. « Mechanical Properties and Surface Morphology of Diamond-Like Carbon Films with SiN_x Interlayer ». Applied Mechanics and Materials 723 (janvier 2015) : 515–19. http://dx.doi.org/10.4028/www.scientific.net/amm.723.515.

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Diamond-like carbon (DLC) film has remarkable physical, mechanical, biomedical and tribological properties that make it attractive material for numerous industrial applications needs of advanced mechanical systems. In this study, deposition process of DLC films on Si (100) are performed by direct-current (DC) magnetron sputtering method. The effects of interlayer on the compositions, structures and mechanical properties of DLC films are studied. The scanning electron microscopy (SEM) and atomic force microscopy (AFM) studies reveal the creation of high uniform surface morphology and low roughness DLC films with SiNxinterlayer. For comparison, DLC films with different interlayers are also grown. The Raman spectra are analyzed in order to characterize the film compositions. Indentation test was performed to value the mechanical properties of DLC films. Raman, SEM, and AFM analyses are correlated with the mechanical properties of the DLC films.

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Guo, Yuan Yuan, Hong Yang Zhao, Dong Ying Ju, Alan Hase et Rong Hua Wei. « Structure and Electrochemical Properties of DLC/SiC Films on the Surface of Magnesium Alloy by Plasma Immersion Ion Deposition ». Materials Science Forum 750 (mars 2013) : 298–301. http://dx.doi.org/10.4028/www.scientific.net/msf.750.298.

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DLC/SiC films (SiC as a transition layer) were prepared on the surface of magnesium alloy (AZ31) using a plasma immersion ion deposition (PIID) process. A dense and smooth DLC film can be observed by SEM. The surface hardness can be improved to 11.45GPa by deposition of the DLC film. Electrochemical tests show that the corrosion potential of AZ31 with DLC film is increased from -1.7V to -0.6V, which indicates that the DLC film improves the corrosion resistance of Mg alloy.

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Kijaszek, Wojciech, Waldemar Oleszkiewicz et Zbigniew Znamirowski. « Application of radio frequency inductively coupled plasma in chemical vapor deposition process of diamond-like carbon films for modification of properties of deposited films ». Materials Science-Poland 36, n^o 1 (18 mai 2018) : 80–85. http://dx.doi.org/10.1515/msp-2017-0119.

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Abstract The authors have deposited the diamond-like carbon (DLC) films by radio frequency inductively coupled plasma enhanced chemical vapor deposition (RF ICP PECVD) method. The investigated DLC films with different sp3 fraction content were deposited on polished and textured silicon substrates. The sp3 fraction content of the deposited DLC films was ranging from 35 % to 70 % and was estimated from acquired Raman scattering spectra (excitation wavelength: 325 nm and 514.5 nm). The measurements of field emission characteristics were carried out in diode configuration. Emission properties of the DLC films were calculated from Fowler-Nordheim plots. The calculated electric field enhancement factor β was ranging from 56 to 198 for the DLC films deposited on polished substrates and from 115 to 445 for films deposited on textured substrates. The surface of the DLC films was observed by scanning electron microscope (SEM) after field emission measurements. The acquired SEM images reveled that the activation of field emission from the DLC films is connected with generation of structural damage to the DLC films.

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