Download or read book Deposition Characterization and Tribological Studies on Carbon Overcoats for Magnetic Storage Disks written by Tse-An Yeh and published by . This book was released on 1993 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Deposition Characterization and Tribological Studies on Carbon Overcoats for Magnetic Storage Disks written by Tse-an Yeh and published by . This book was released on 1993 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Deposition Characterization and Tribological magnetic Studies of Diamond like Carbon and Magnetic Thin Films written by Geng Wang and published by . This book was released on 1997 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Amorphous Carbon Films for Magnetic Storage Technology written by Jun Xie and published by . This book was released on 2015 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing demands for high magnetic storage capacity have led to the increase of the recording area density, mainly by reducing the distance between the magnetic media on the hard disk and the magnetic transducer of the head. A factor that has greatly contributed to the profound decrease of the magnetic spacing is excessive thinning of the protective amorphous carbon (a-C) overcoat. However, the remarkable decrease in overcoat thickness raises a concern about its quality and protective capability. In general, a-C films with higher sp3 carbon atom hybridization demonstrate higher density and better tribomechanical and corrosion properties. The sp2 and sp3 contents strongly depend on the film-growth conditions and deposition method. One of the most common film deposition methods is radio-frequency (RF) sputtering. This method uses low-energy neutral carbon atoms or clusters of atoms as film precursors and has been the workhorse of storage technology for more than four decades. Typically, Ar+ ion bombardment of the growing film during film growth is used to tailor the overcoat structure and properties without affecting its chemical environment. The substrate bias voltage is a key deposition parameter because it directly affects the ion bombardment energy. In this dissertation, the effect of the substrate bias voltage on the growth and properties of ultrathin a-C films was examined and the identified film structure-property interdependencies were explained in the context of an analytical model, which takes into account the effects of irradiation damage and thermal spikes. Substrate biasing during film deposition may lead to some undesirable effects, such as the development of a high compressive residual stress, which can cause premature overcoat failure by delamination. Experimental studies of this dissertation show that alternating between biasing and non-biasing deposition conditions, multi-layer a-C films consisting of ultrathin hard (bias on) and soft (bias off) layers characterized by high sp3 fraction and greatly reduced compressive residual stress can be synthesized by RF sputtering. An additional advantage is that these multi-layer a-C films exhibit lower surface roughness and improved tribological properties. Different from deposition methods using neutral carbon atoms as film-forming precursors, such as RF sputtering and other physical vapor deposition methods, filtered cathodic vacuum arc (FCVA) uses energetic C+ ions as film precursors, which is advantageous for depositing ultrathin and very smooth a-C films with superior nanomechanical/tribological properties. The role of important FCVA process parameters, such as substrate bias voltage, which controls the C+ ion energy, in the film growth process were investigated, while considering various means of reducing the a-C film thickness without jeopardizing its structure and properties. The effect of the duty cycle of substrate pulse biasing (i.e., the ratio of the time of substrate biasing over a pulse to the pulse bias period) was examined in terms of film deposition rate, surface topography, and nanostructure. Cross-sectional high-resolution transmission electron microscopy (HRTEM) combined with the scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS) studies revealed variations in through-thickness hybridization and density with duty cycle. a-C films with the highest sp3 content and smallest thickness were synthesized under FCVA deposition conditions of 75% and 65% duty cycle, respectively. EELS studies show that a-C films generally possess a multi-layered structure consisting of surface and interface layers of relatively low sp3 contents and intermediate bulk layer of much higher sp3 content, a result of the deposition mechanisms encountered during ion bombardment. When the a-C film thickness is reduced to only 2-3 nm, the effects of the ultrathin (1-2 nm) surface and interface layers become increasingly more pronounced, resulting in the decrease of the overall sp3 content and, in turn, depletion of the film's protective capability. To reduce the thickness of the interface layer, a thin (
Download or read book The Preparation Characterization and Tribological Study of RF Sputtered Thin Films for Magnetic Memory Disk written by Chengyea Leu and published by . This book was released on 1987 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Carbon Overcoats and Other Surface Layers on Tribological Surfaces written by Leon Philip DuPlessis and published by . This book was released on 1990 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nanotribology and Nanomechanics II written by Bharat Bhushan and published by Springer Science & Business Media. This book was released on 2011-05-30 with total page 1025 pages. Available in PDF, EPUB and Kindle. Book excerpt: The comprehensive reference and textbook serves as a timely, practical introduction to the principles of nanotribology and nanomechanics. Assuming some familiarity with macroscopic tribology, the book comprises chapters by internationally recognized experts, who integrate knowledge of the field from the mechanics and materials-science perspectives. They cover key measurement techniques, their applications, and theoretical modelling of interfaces, each beginning their contributions with macro- and progressing to microconcepts.
Download or read book Tribology of Diamond like Carbon Films written by Christophe Donnet and published by Springer Science & Business Media. This book was released on 2007-12-06 with total page 673 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights some of the most important structural, chemical, mechanical and tribological characteristics of DLC films. It is particularly dedicated to the fundamental tribological issues that impact the performance and durability of these coatings. The book provides reliable and up-to-date information on available industrial DLC coatings and includes clear definitions and descriptions of various DLC films and their properties.
Download or read book Nanotribology and Nanomechanics written by Bharat Bhushan and published by Springer Science & Business Media. This book was released on 2006-01-27 with total page 1157 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recent emergence and proliferation of proximal probes, e.g. SPM and AFM, and computational techniques for simulating tip-surface interactions has enabled the systematic investigation of interfacial problems on ever smaller scales, as well as created means for modifying and manipulating nanostructures. In short, they have led to the appearance of the new, interdisciplinary fields of micro/nanotribology and micro/nanomechanics. This volume serves as a timely, practical introduction to the principles of nanotribology and nanomechanics and applications to magnetic storage systems and MEMS/NEMS. Assuming some familiarity with macrotribology/mechanics, the book comprises chapters by internationally recognized experts, who integrate knowledge of the field from the mechanics and materials-science perspectives. They cover key measurement techniques, their applications, and theoretical modelling of interfaces, each beginning their contributions with macro- and progressing to microconcepts. After reviewing the fundamental experimental and theoretical aspects in the first part, Nanotribology and Nanomechanics then treats applications. Three groups of readers are likely to find this text valuable: graduate students, research workers, and practicing engineers. It can serve as the basis for a comprehensive, one- or two-semester course in scanning probe microscopy; applied scanning probe techniques; or nanotribology/nanomechanics/nanotechnology, in departments such as mechanical engineering, materials science, and applied physics. With a Foreword by Physics Nobel Laureate Gerd Binnig Dr. Bharat Bhushan is an Ohio Eminent Scholar and The Howard D. Winbigler Professor in the Department of Mechanical Engineering, Graduate Research Faculty Advisor in the Department of Materials Science and Engineering, and the Director of the Nanotribology Laboratory for Information Storage & MEMS/NEMS (NLIM) at the Ohio State University, Columbus, Ohio. He is an internationally recognized expert of tribology and mechanics on the macro- to nanoscales, and is one of the most prolific authors. He is considered by some a pioneer of the tribology and mechanics of magnetic storage devices and a leading researcher in the fields of nanotribology and nanomechanics using scanning probe microscopy and applications to micro/nanotechnology. He is the recipient of various international fellowships including the Alexander von Humboldt Research Prize for Senior Scientists, Max Planck Foundation Research Award for Outstanding Foreign Scientists, and the Fulbright Senior Scholar Award.
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1993 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Lubrication and Tribology written by George E. Totten and published by CRC Press. This book was released on 2006-04-06 with total page 1219 pages. Available in PDF, EPUB and Kindle. Book excerpt: When it was first published some two decades ago, the original Handbook of Lubrication and Tribology stood on technology's cutting-edge as the first comprehensive reference to assist the emerging science of tribology lubrication. Later, followed by Volume II, Theory and Design and Volume III, Monitoring, Materials, Synthetic Lubricants, and Ap
Download or read book Ultrathin Carbon Based Overcoats for Extremely High Density Magnetic Recording written by Reuben Jueyuan Yeo and published by Springer. This book was released on 2017-06-20 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the latest research in ultrathin carbon-based protective overcoats for high areal density magnetic data storage systems, with a particular focus on hard disk drives (HDDs) and tape drives. These findings shed new light on how the microstructure and interfacial chemistry of these sub-20 nm overcoats can be engineered at the nanoscale regime to obtain enhanced properties for wear, thermal and corrosion protection – which are critical for such applications. Readers will also be provided with fresh experimental insights into the suitability of graphene as an atomically-thin overcoat for HDD media. The easy readability of this book will appeal to a wide audience, ranging from non-specialists with a general interest in the field to scientists and industry professionals directly involved in thin film and coatings research.
Download or read book Carbon written by Tapan Gupta and published by Springer. This book was released on 2017-10-25 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: All living things contain carbon in some form, as it is the primary component of macromolecules including proteins, lipids, nucleic acids (RNA and DNA), and carbohydrates. As a matter of fact, it is the backbone of all organic (chemistry) compounds forming different kinds of bonds. Carbon: The Black, the Gray and the Transparent is not a complete scientific history of the material, but a book that describes key discoveries about this old faithful element while encouraging broader perspectives and approaches to its research due to its vast applications. All allotropes of carbon are described in this book, along with their properties, uses, and methods of procurement or manufacturing. Black carbon is represented by coal, gray carbon is represented by graphite, and transparent carbon is represented by diamond.
Download or read book Graduate School Commencement written by University of Minnesota. Graduate School and published by . This book was released on 1994 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Protective Coatings and Thin Films written by Y. Pauleau and published by Springer Science & Business Media. This book was released on 1996-12-31 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume entitled "Protective Coatings and Thin Films : Synthesis, Characterization and Applications" contains the Proceedings of the NATO Advanced Research Workshop (ARW) held in Alvor, Portugal from May 30 to June 5, 1996. This NATO-ARW was an expert meeting on the surface protection and modification of solid materials subjected to interactions with the environment. The meeting attracted 10 key speakers, 40 contributing speakers and 3 observers from various countries. The existing knowledge and current status of the science and technology related to protective coatings and thin films were assessed through a series of oral presentations, key notes (titles underlined in the volume content) and contributed papers distributed over various sessions dealing with: (a) plasma-assisted physical and chemical vapor deposition processes to enhance wear and corrosion protection of materials, (b) low friction coatings operating in hostile environment (vacuum, space, extreme temperatures, . . . ), (c) polymer films for protection against mechanical damage and chemical attack, (d) characterization of the structure of films and correlations with mechanical properties, (e) wear and corrosion resistant thermal spray coatings, (f) functional gradient ceramic/metallic coatings produced by high energy laser beam and energetic deposition processes for high temperature applications, (g) protective coatings for optical systems, and (h) ion beam assisted deposition of coatings for protection of materials against aqueous corrosion.
Download or read book Advances In Information Storage Systems Selected Papers From The International Conference On Micromechatronics For Information And Precision Equipment Mipe 97 Volumes 9 10 written by Bharat Bhushan and published by World Scientific. This book was released on 1999-01-04 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Information Storage Systems (AISS), volumes 9 & 10, are special volumes which contain selected papers regarding not only information storage but also information equipment in general and related technologies. The papers were presented at the International Conference on Micromechatronics for Information and Precision Equipment (MIPE '97). MIPE '97 was held in Tokyo, Japan, from 20 to 23 July 1997, as one of the memorial events of the Centennial Grand Congress of the Japan Society of Mechanical Engineers.Information and precision equipment is fast-changing high technology, and is necessary for the development of an international multimedia society and essential for the innovation of conventional machines as well as the creation of new sophisticated machines for future medical, biological and cosmic industries in the 21st century. Information and precision equipment can improve their performances by analyzing, designing, fabricating, controlling and then utilizing a smaller and smaller world in space and time. Micromechatronics is not only a major interdisciplinary engineering but also the principle of innovation in such machines.In the light of this, the scope of MIPE '97 ranged from the micromechanics and micromechatronics of information storage, input/output devices, and precision equipment to microtechnologies related to information equipment. The papers in AISS special volumes are mainly related to information storage, particularly magnetic recording storage. But some of them are related to printer, paper-feeding-mechanism and micromachine technologies, which will directly or indirectly contribute future information devices. The papers contained in this series are of international archival quality and are refereed according to rigorous journal standards.Volume 9 contains papers on the mechanics and tribology of magnetic recording storage systems (mainly hard disk drives), while papers on the micromechatronics of the head-positioning system in magnetic disk storage are compiled in Volume 10 together with papers on optical disk storage and others.
Download or read book Advances in Information Storage Systems written by Bharat Bhushan and published by World Scientific. This book was released on 1999 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Information Storage Systems (AISS), volumes 9 & 10, are special volumes which contain selected papers regarding not only information storage but also information equipment in general and related technologies. The papers were presented at the International Conference on Micromechatronics for Information and Precision Equipment (MIPE '97). MIPE '97 was held in Tokyo, Japan, from 20 to 23 July 1997, as one of the memorial events of the Centennial Grand Congress of the Japan Society of Mechanical Engineers.Information and precision equipment is fast-changing high technology, and is necessary for the development of an international multimedia society and essential for the innovation of conventional machines as well as the creation of new sophisticated machines for future medical, biological and cosmic industries in the 21st century. Information and precision equipment can improve their performances by analyzing, designing, fabricating, controlling and then utilizing a smaller and smaller world in space and time. Micromechatronics is not only a major interdisciplinary engineering but also the principle of innovation in such machines.In the light of this, the scope of MIPE '97 ranged from the micromechanics and micromechatronics of information storage, input/output devices, and precision equipment to microtechnologies related to information equipment. The papers in AISS special volumes are mainly related to information storage, particularly magnetic recording storage. But some of them are related to printer, paper-feeding-mechanism and micromachine technologies, which will directly or indirectly contribute future information devices. The papers contained in this series are of international archival quality and are refereed according to rigorous journal standards.Volume 9 contains papers on the mechanics and tribology of magnetic recording storage systems (mainly hard disk drives), while papers on the micromechatronics of the head-positioning system in magnetic disk storage are compiled in Volume 10 together with papers on optical disk storage and others.
