Download or read book Optical and Tribological Properties of Diamond like Carbon Films Synthesized by Plasma Immersion Ion Processing written by and published by . This book was released on 1999 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hard diamond-like carbon (DLC) films have been prepared on PMMA (Polymethyl methacrylate), glass, and Si(100) substrates using C2H2-Ar plasma immersion ion processing (PIIP). The composition, structure, and properties of the films were investigated with regard to variation of the deposition parameters. It was found that the modulation of reactive gas composition during PIIP could enhance the formation of DLC films with an increased sp3 bonding structure, improved surface smoothness, high density and high hardness. An optimal combination of good optical properties and high hardness was highly dependent on the control of hydrogen content in the DLC films. Tribological tests showed that DLC-coated glass and PMMA samples exhibited a reduced friction coefficient and enhanced wear resistance relative to uncoated glass and PMMA materials. The effects of ion energy and gas composition during PIIP deposition on the formation of optically transparent and wear resistant DLC films are discussed.
Download or read book Diamond Like Carbon Coatings written by Peerawatt Nunthavarawong and published by CRC Press. This book was released on 2022-08-08 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diamond-like carbons (DLCs) display a number of attractive properties that make them versatile coating materials for a variety of applications, including extremely high hardness values, very low friction properties, very low gas permeability, good biocompatibility, and very high electrical resistivity, among others. Further research into this material is required to produce hydrogen-free DLC films and to synthesize it together with other materials, thereby obtaining better film properties. Diamond-Like Carbon Coatings: Technologies and Applications examines emerging manufacturing technologies for DLCs with the aim of improving their properties for use in practical applications. Discusses DLC coatings used in mechanical, manufacturing, and medical applications Details recent developments in the novel synthesis of DLC films Covers advances in understanding of chemical, structural, physical, mechanical, and tribological properties for modern material processing Highlights methods to yield longer service life Considers prospects for future applications of emerging DLC technologies This work is aimed at materials science and engineering researchers, advanced students, and industry professionals.
Download or read book Tribological Properties of RF Plasma Deposited Optically Transparent Diamond like Carbon Films written by S. R. P. Silva and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Diamond like Carbon Coatings Deposited by Plasma Source Ion Implantation and Conventional Ion Beam Assisted Deposition Processes written by Brian M. Stout and published by . This book was released on 1999 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diamond-like carbon coatings produced by Plasma Source Ion Implantation (PSII) and beamline Ion Beam Assisted Deposition (IBAD) were synthesized and studied. Gas pressure and electrical current were used as variables to design four independent PSII test sets. Beamline IBAD samples were produced with a pre-optimized set of parameters. Profilometry measurements showed the films to have thicknesses between 1.44 +/- 09 and 1.64 +/- 04 microns and to possess very low roughness averages, ranging from 14 +/- 3 to 28 +/- 3 nm, which correlate with substrate surface roughness. Atomic Force Microscopy revealed that diamond-like carbon crystal sizes varied significantly with chamber pressure. Crystals were generally spherical in shape suggesting that films were highly amorphous. Microhardness and nanohardness test results showed the hardest films to be greater than 3 times the hardness of untreated steel. The elastic modulus of the films, measured during the nanohardness test, was directly related to film hardness. Fretting wear and Pin-on-Disk tests were performed to quantitatively assess the ability of films to resist wear. Fretting wear tests showed a dramatic decrease in friction for diamond-like carbon films with friction levels ranging from 10% to 30% of that of untreated steel. Pin-on-Disk tests revealed a significant improvement in wear resistance prior to stylus penetration into the substrate.
Download or read book Plasma deposited Amorphous Hydrogenated Carbon Films and Their Tribological Properties written by and published by . This book was released on 1989 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diamond and Diamond like Films and Coatings written by Robert E. Clausing and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 894 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diamond films grown by activated chemical vapor deposition have superlative thermal, mechanical, optical, and electronic properties combined with a very high degree of chemical inertness to most environments. These properties, together with the ability to fabricate films and shapes of considerable size, promise an exciting new material with many applications. Some applications are on the verge of commercialization but many await a few more technological developments. Diamond-like films are already employed in both commercial and military applications. The popular press, as well as the scientific and technological and industrial communities, are increasingly interested in the potential for future development of these materials. Although there are many technical papers and review articles published, there is no Single comprehensive introduction to these technologies. The Scientific Affairs Division of NATO recognized the need and the future importance of these technologies and authorized an Advanced Study Institute on diamond and diamond-like films. NATO Advanced Study Institutes are high level teaching activities at which a carefully defined subject is presented in a systematic and coherently structured program. The subject is treated in considerable depth by lecturers eminent in their fields and of international standing. The presentations are made to students who are scientists in the field or who possess an advanced general scientific background.
Download or read book Diamond like Carbon Films Produced by Pulse biased DC Glow Discharge written by Ling Xie and published by . This book was released on 1994 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book MODIFICATION OF SURFACE AND TRIBOLOGICAL PROPERTIES OF DLC FILMS BY ADDING SILVER CONTENT written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The incorporation of silver into the diamond-like carbon (DLC) coatings has shown excellent potential in various applications; therefore the surface and tribological properties of silver-containing DLC thin films deserve to be investigated. In this study we have deposited silver-containing hydrogenated and hydrogen-free DLC coatings by plasma immersion ion implantation and deposition (PIII-D) methods. Atomic force microscopy (AFM) and nano-scratch tests were used to study the surface and tribological properties. The silver incorporation had only slight effects on hydrogenated DLC coatings. However, the incorporation of silver has significant effect on hydrogen-free DLC of smoothing the surface and increasing the surface energy. Those effects have been illustrated and explained in the context of experimental results.
Download or read book Diamond like Carbon Films written by Yuto S. Tanaka and published by Nova Biomedical Books. This book was released on 2012-02 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents current research from across the globe in the study of diamond-like carbon films. Topics discussed include the peculiarities of ion-beam synthesis of carbon-based phases; electron field emission properties of non-metal and metal doped diamond like carbon; internal stress and its reduction of hydrogenated diamond-like carbon thin films deposited by plasma CVD methods; incorporating crystalline diamond particles in diamond-like carbon films to improve their properties and diamond-like carbon films applied as an alignment layer for LCDs.
Download or read book Synthesis of Silver diamond Like Carbon Thin Films by Magnetron Sputtering written by Venkatesh Majji and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Diamond-like carbon thin films are been used in wide range of applications due to their attractive tribological properties. Metal-doped DLC films have significant properties which make them compatible to use in larger variety of applications. The present study examines the dispersion and their effect on various tribological properties when Ag is incorporated into the DLC thin films. These Ag-DLC nanocomposite films were synthesized by a hybrid CVD and magnetron sputtering process in a discharge composed of CH4, and Ar atmosphere. These DLC and Ag-DLC films were characterized by Transmission Electron Microscopy (TEM), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS) and Raman Spectroscopy. Tribological tests were carried out to measure the frictional and wear behavior of the Ag-DLC films as a function of Ag content. The TEM cross sectional studies revealed that Ag is present as Ag nanoparticles that were distributed uniformly throughout an amorphous DLC matrix. XPS analysis confirmed that Ag in the nanoparticles was present in the metallic form. Increasing the Ag content in the film, reduced its sp3 content. The incorporation of these nanoparticles causes a reduction in hardness in Ag-DLC when compared with pure DLC films. Microhardness of DLC films exhibits values up to a maximum of 16 GPa and gradually decreases with increasing in Ag content. FTIR and Raman studies confirmed that the films contain a significant amount of hydrogen, and with an increase in the Ag content in the DLC film results in an increase in sp2 carbon content. Finally, the friction behavior of the Ag-DLC films showed a comparable performance with that of DLC films with a coefficient of friction as low as 0.1. The DLC films exhibited a lower wear rate of 5.51x10−8 mm3/Nm than Ag-DLC films. The wear rate in the Ag-DLC films gradually increased with increasing Ag content but it remained at low levels (i.e., up to 1.7x10−7 mm3/Nm). This is consistent with the higher sp2 content of the Ag-DLC films.
Download or read book Nanocrystalline Diamond like Carbon Films written by Shailesh P. Rodrigues and published by . This book was released on 2000 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Diamond-like carbon is a very promising material having numerous metrology, tribological, optical, electronics and biological applications. There are various methods by which diamond-like carbon can be deposited. We have been depositing nanocrystalline diamond-like carbon films using plasma chemical vapor deposition technique. The deposition of these films was carried out at a bias of 50V and lower. It is believed that higher bias damages the material as it is formed, leading to the formation of graphite. It is observed that better system grounding improves the thickness uniformity of these films. Work was switched to glass substrates so that the optical properties could be easily examined. The films that have been deposited are transparent to a large extent. There is some absorption in the films, which could be due to the presence of some graphite particles and also due to the presence of some C-H bonds in the films. Atomic force microscopy shows very smooth surface. Transmission electron microscopy shows nanocrystalline diamond-like carbon of short-range order. This material if deposited on a surface with small irregularities will actually smoothen it.
Download or read book Thermal Degradation and Tribiological Behavior of Diamond like Carbon Films Prepared by Plasma assisted Chemical Vapor Deposition written by Daesig Kim and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thin Film Diamond written by A.H. Lettington and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work, written by leading international authorities, deals with nucleation growth and processing, characterization and electrical, thermal, optical and mechanical properties of thin film diamond. The final chapters are devoted to the broad range of applications of this material.
Download or read book Optical and Scratch Resistant Properties of Diamondlike Carbon Films Deposited with Single and Dual Ion Beams written by and published by . This book was released on 1993 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tribological Performance of Diamond and Diamondlike Carbon Films at Elevated Temperatures written by and published by . This book was released on 1995 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, we investigated the tribological performance of diamond and diamondlike carbon (DLC) films as a function of ambient temperature. Both films were deposited on silicon carbide (SiC) by microwave plasma chemical vapor deposition and ion-beam deposition processes. Tribological tests were performed on a reciprocating wear machine in open air (20 to 30% relative humidity) and under a 10-N load using SiC pins. For the test conditions explored, the steady- state friction coefficients of test pairs without a diamond or DLC film were 0.7 to 0.9 and the average wear rates of pins were 10−5 to 10−7 mm3/N.m, depending on ambient temperature. DLC films reduced the steady-state friction coefficients of test pairs by factors of 3 to 5 and the wear rates of pins by two to three orders of magnitude. Low friction coefficients were also obtained with the diamond films, but wear rates of the counterface pins were high due to the very abrasive nature of these films. The wear of SiC disks coated with either diamond or DLC films was virtually unmeasurable while the wear of uncoated disks was substantial. Test results showed that the DLC films could afford low friction up to about 300°C. At higher temperatures, the DLC films became graphitized and were removed from the surface. The diamond films could withstand much higher temperatures, but their tribological behavior degraded. Raman spectroscopy and scanning electron microscopy were used to elucidate the friction and wear mechanisms of both films at high temperatures.
Download or read book Comprehensive Materials Processing written by and published by Newnes. This book was released on 2014-04-07 with total page 5485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive Materials Processing, Thirteen Volume Set provides students and professionals with a one-stop resource consolidating and enhancing the literature of the materials processing and manufacturing universe. It provides authoritative analysis of all processes, technologies, and techniques for converting industrial materials from a raw state into finished parts or products. Assisting scientists and engineers in the selection, design, and use of materials, whether in the lab or in industry, it matches the adaptive complexity of emergent materials and processing technologies. Extensive traditional article-level academic discussion of core theories and applications is supplemented by applied case studies and advanced multimedia features. Coverage encompasses the general categories of solidification, powder, deposition, and deformation processing, and includes discussion on plant and tool design, analysis and characterization of processing techniques, high-temperatures studies, and the influence of process scale on component characteristics and behavior. Authored and reviewed by world-class academic and industrial specialists in each subject field Practical tools such as integrated case studies, user-defined process schemata, and multimedia modeling and functionality Maximizes research efficiency by collating the most important and established information in one place with integrated applets linking to relevant outside sources
Download or read book Method for Producing Fluorinated Diamond like Carbon Films written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluorinated, diamond-like carbon (F-DLC) films are produced by a pulsed, glow-discharge plasma immersion ion processing procedure. The pulsed, glow-discharge plasma was generated at a pressure of 1 Pa from an acetylene (C.sub. 2 H.sub. 2) and hexafluoroethane (C.sub. 2 F.sub. 6) gas mixture, and the fluorinated, diamond-like carbon films were deposited on silicon 100substrates. The film hardness and wear resistance were found to be strongly dependent on the fluorine content incorporated into the coatings. The hardness of the F-DLC films was found to decrease considerably when the fluorine content in the coatings reached about 20%. The contact angle of water on the F-DLC coatings was found to increase with increasing film fluorine content and to saturate at a level characteristic of polytetrafluoroethylene.
