Download or read book Self Lubricating Composites written by Pradeep L. Menezes and published by Springer Nature. This book was released on 2022-01-03 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: In most tribological applications, liquid or grease based lubricants are used to facilitate the relative motion of solid bodies to minimize friction and wear between interacting surfaces. The challenges for liquid lubricants arise in extreme environmental conditions, such as very high or low temperatures, vacuum, radiation, and extreme contact pressure. At these conditions, solid lubricants may be the alternative choice which can help to decrease friction and wear without incorporating liquid lubricants. Challenges with solid lubricants are to maintain a continuous supply of solid lubricants on the contact surfaces to act as lubricous layer between two sliding surfaces. Such a continuous supply is more easily maintained in the case of liquid lubricants when compared to solid lubricants. The most innovative development to ensure a continuous supply of solid lubricant to the contact surface during sliding is to introduce solid lubricant as reinforcement into the matrix of one of the sliding components. Composite materials are engineered or naturally occurring materials which contain two or more distinct constituents with significantly different chemical, physical and mechanical properties. Composites consist of reinforcement and matrix (metal, polymer and ceramics). Among various reinforcements, recent emerging material, solid lubricant, is found to have many favorable attributes such as good lubrication property. Self‐lubrication is the ability of a material to provide lubrication to the contact surface to decrease friction and wear rate in the absence of an external lubricant by transferring embedded solid lubricants in the composite to the interface. Self-lubricating composites (SLCs) are an important category of engineering materials that are increasingly replacing a number of conventional materials in the automotive, aerospace, and marine industries due to superior tribological properties. In SLCs, solid lubricant materials, including carbonous materials, molybdenum disulfide (MoS2), and hexagonal boron nitride (h-BN) are embedded into the matrices as reinforcements to manufacture a novel material with attractive self-lubricating properties. Several studies have been investigated the tribological properties of self-lubricating materials. This book fills that gap to have a reference book about self-lubricating materials and their properties to help scientists, engineers, and industries. This book discusses mechanisms of self-lubricating materials, self-lubricating properties and the applications for industries. The chapters will be written by authoritative expertise in the field. Additionally, this book will demonstrate fundamental study and most advanced innovations in self-lubricating materials as regards to friction and wear. The chapters also include tribological properties of composites and coatings and some practical applications of self-lubricating materials.

Download or read book Tribology and Applications of Self Lubricating Materials written by Emad Omrani and published by CRC Press. This book was released on 2017-11-06 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tribology and Applications of Self-Lubricating Materials provides insight into the complex mechanisms behind the development of self-lubricating materials, which due to their ability to transfer embedded solid lubricants to the contact surface to decrease wear rate and friction in the absence of an external lubricant, make up an important part of engineering materials used today. This book emphasizes an understanding of the tribological nature of different composites such as metal, polymer, and ceramic matrix composites and discusses the compatibility of these composites with specific lubricants. The book also offers a view of advancements in the development of self-lubricating mechanisms and covers the latest technologies in the field.

Download or read book Tribology and Applications of Self Lubricating Materials written by Emad Omrani and published by CRC Press. This book was released on 2017-11-06 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tribology and Applications of Self-Lubricating Materials provides insight into the complex mechanisms behind the development of self-lubricating materials, which due to their ability to transfer embedded solid lubricants to the contact surface to decrease wear rate and friction in the absence of an external lubricant, make up an important part of engineering materials used today. This book emphasizes an understanding of the tribological nature of different composites such as metal, polymer, and ceramic matrix composites and discusses the compatibility of these composites with specific lubricants. The book also offers a view of advancements in the development of self-lubricating mechanisms and covers the latest technologies in the field.

Download or read book Smart Polymer Nanocomposites written by Showkat Ahmad Bhawani and published by Woodhead Publishing. This book was released on 2020-11-28 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Smart Polymer Nanocomposites: Biomedical and Environmental Applications presents the latest information on smart polymers and their promising application in various fields, including their role in delivery systems for drugs, tissue engineering scaffolds, cell culture sports, bioseparation, and sensors or actuator systems. - Features detailed information on the preparation, characterization and applications of smart functional polymer composites - Covers a broad range of applications in both the biomedical and environmental engineering fields - Chapters are written by authors with diverse background expertise from the faculties of chemistry, engineering and the manufacturing industry

Download or read book Tribology and Sustainability written by Jitendra Kumar Katiyar and published by CRC Press. This book was released on 2021-08-26 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tribology and Sustainability brings a vision of promoting a greener, cleaner and eco-friendly environment by highlighting sustainable solutions in tribology via the development of self-lubricating materials, green additives in lubricants, natural fibre-reinforced materials and biomimetic approaches. Backed by supporting schematic diagrams, data tables and illustrations for easy understanding, the book focuses on recent advancements in tribology and sustainability. Global sustainability and regional requirements are addressed through chapters on natural composites, green lubricants, biomedical systems and wind energy systems, with a dedicated chapter on a global sustainability scenario. FEATURES Highlights sustainability via new tribological approaches and how such methods are essential Covers the theoretical aspects of various tribological topics concerning mechanical and material designs for energy-efficient systems Includes practical global sustainability based on the regional requirements of tribological research and sustainable impact Reviews the tribology of green lubricants, green additives and lightweight materials Discusses topics related to biomimetics and biotribology Tribology and Sustainability will assist researchers, professionals and graduate students in tribology, surface engineering, mechanical design and materials engineering, including mechanical, aerospace, chemical and environmental engineering.

Download or read book Handbook Of Polymer Tribology written by Sujeet K Sinha and published by World Scientific. This book was released on 2018-03-07 with total page 735 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook is a collection of authoritative information in the new and expanding field of polymer tribology. It brings together various research topics in the field of polymer tribology in a single volume, and provides relevant data in polymer tribology for research and industrial applications.The book's chapters are written by active, world-renowned researchers in the field. Subjects covered in this book range from the fundamentals of polymer tribology to highly applied topics such as machine element design (bearing and gears), hip prosthetic and microsystems applications.Readers in the field of tribology, in general, and polymer tribology, in particular, will find it very useful as it covers nearly all aspects of polymer tribology. Academics creating new courses based on polymer tribology will also find this book's comprehensive coverage valuable. Researchers will find this book a ready source of the state-of-the-art in the field of polymer tribology.

Download or read book Solid Lubricants and Self Lubricating Solids written by Francis J. Clauss and published by Elsevier. This book was released on 2012-12-02 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid Lubricants and Self-Lubricating Solids provides a concise treatment of solid lubricants and self-lubricating solids and their applications. These solid lubricants include graphite, molybdenum disulfide, plastics and thermoplastics, nylon, soft metals, fluorocarbons, and phenolics. Low-friction inorganic solids as well as miscellaneous inorganic compounds such as dichalcogenides and fluorides are also discussed. This book is comprised of 11 chapters and begins with an overview of some basic facts about friction and lubrication. The reader is then introduced to inorganic solid lubricants, their their crystal structure, advantages and disadvantages, and the forms in which they are most commonly used. The following chapters focus on the lubricating qualities of graphite, molybdenum disulfide, plastics and thermoplastics, nylon, soft metals, and fluorocarbons. Miscellaneous inorganic compounds with special applications involving friction and wear are also considered. The final chapter is devoted to phenolic laminates, their properties, and their mechanical applications such as gears and bearings. This monograph will be a useful resource for designers and operating engineers.

Download or read book Friction Wear Lubrication written by Kenneth C Ludema and published by CRC Press. This book was released on 2018-09-14 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of a bestseller, this book introduces tribology in a way that builds students’ knowledge and understanding. It includes expanded information on topics such as surface characterization as well as recent advances in the field. The book provides additional descriptions of common testing methods, including diagrams and surface texturing for enhanced lubrication, and more information on rolling element bearings. It also explores surface profile characterization and elastic plastic contact mechanics including wavy surface contact, rough surface contact models, friction and wear plowing models, and thermodynamic analysis of friction.

Download or read book Self lubricating Composites of Porous Nickel and Nickel chromium Alloy Impregnated with Barium Fluoride calcium Fluoride Eutectic written by Harold E. Sliney and published by . This book was released on 1966 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Self-lubricating composites were prepared by vacuum-impregnating porous nickel or Inconel X-750 (nickel-chromium alloy) with a barium fluoride - calcium fluoride eutectic composition. Density measurements and photomicrographs of the resulting composite structures demonstrated that this process completely filled the voids of the porous metals with the fluoride eutectic. The compressive yield strength of the nickel composites was quite low (about 30 000 psi); therefore, in order to avoid severe plastic deformation during the friction and wear experiments, it was necessary to employ moderate contact stresses. However, alloy composites were comparatively resistant to plastic deformation; the compressive yield strength was 78 000 pounds per square inch or about 75 percent of the strength of the age-hardened alloy in the dense, wrought form. The air at moderate contact stresses, the friction and wear properties of nickel composites were only slightly inferior to those of the alloy composites. Oxidation of nickel composites becomes serious at 12000 F, however, and limits the usefulness of this material in air to a maximum temperature of about 11000 F. The corresponding temperature limitation of the alloy composites in air was about 1350 F. In a hydrogen atmosphere, the alloy composites performed satisfactorily to 15000 F and may be suitable to somewhat higher temperatures. The frictional properties of the composites were significantly improved by the application of a thin, sintered coating of the eutectic fluoride to the bearing surfaces of the composites.

Download or read book High performance Self lubricating Ceramic Composites with Laminated graded Structure written by Yongsheng Zhang and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: High-performance ceramic composites are potential candidates for the application of wear-resistance components because of their excellent properties. Nevertheless, many problems, such as high friction coefficient of ceramic material and poor mechanical properties of ceramic-matrix self-lubricating composites, limit a wider range of applications of these composites in tribological areas. Therefore, improving high-toughness ceramic-matrix self-lubricating materials for practical applications is significant. This study proposes a new design for ceramic self-lubricating composites to overcome the conflict between their mechanical and tribological properties. Complying with the design principle of bionic and graded composites, two kinds of self-lubricating ceramic composites with laminated-graded structure were prepared, and their mechanical and tribological properties were studied. The results show that this newly developed ceramic composite has achieved satisfactory strength and tribological properties compared with the traditional ceramic self-lubricating composites. The bending strength reached the same level as the properties of general monolithic ceramics. In the temperature range of 25-800 °C, the friction coefficient of composites was less than 0.55, which was about half of that of monolithic ceramics.

Download or read book Database for the Tribological Properties of Self Lubricating Materials written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-16 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: A test program to determine the tribological properties of several self-lubricating composites was performed. Testing was done using an LFW-1 Friction and Wear machine. Each material was tested at four load levels (66 N, 133 N, 266 N, and 400 N) under ambient conditions. The coefficient of friction and wear rate was determined for each material, and a relative ranking of the composites was made. Jett, T. R. and Thom, R. L. Marshall Space Flight Center NASA/TM-1998-207195, NAS 1.15:207195, M-857 ...

Download or read book Molybdenum Disulphide Lubrication written by A.R. Lansdown and published by Elsevier. This book was released on 1999-05-28 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the 1970s and the early 1980s there was an enormous volume of research and development into the subject of molybdenum disulphide lubrication, much of which was supported by national governments for the benefit of defence, aviation or space activities. There were already some well-established practical guidelines for deciding when and how to use molybdenum disulphide, but there was still a considerable lack of universally-accepted theoretical understanding of some of the important and fundamental aspects of molybdenum disulphide technology. However, the state of knowledge was growing rapidly.In the past fifteen years the situation with regard to the technology of molybdenum disulphide lubrication has stabilised in many respects, and a measure of consensus has been reached about some of the mechanisms involved. The use of molybdenum disulphide has become routine in some industries, and there are many well-established and reputable commercial products available. Except in the high-technology field of physical deposition techniques, especially sputtering, the output of new research publications has fallen from perhaps two hundred a year in the 1970s to fewer than ten a year in the 1990s. In spite of this maturing of the subject, it is clear that there are still many aspects in which disagreements persist about the mechanisms involved, and which as a result are unclear or misunderstood among current, and perhaps even more importantly, potential users.One of the primary objectives of this book is to analyse the various aspects of molybdenum disulphide lubrication technology about which there are still disagreements or controversy, and to attempt to come to firm conclusions about some of the mechanisms involved. In particular, it will place emphasis on the importance and effects of burnishing and film consolidation.

Download or read book Friction and Wear of Ceramics written by Said Jahanmir and published by CRC Press. This book was released on 1993-09-23 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides comprehensive information on the tribological aspects of advanced ceramic materials for all uses that require controlled friction and wear resistance. The text is a guide to altering the microstructure of ceramics to create optimum performance in sliding and rolling contact applications.

Download or read book Polymer Tribology written by Sujeet K. Sinha and published by World Scientific. This book was released on 2009 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with the new and now-expanding field of friction, wear, and other surface-related mechanical phenomena for polymers. Polymers have been used in various forms such as bulk, films, and composites in applications where their friction, wear resistance, and other surface-related properties have been effectively utilized. There are also many examples in which polymers have performed extremely well, such as in tyres, shoes, brakes, gears, bearings, small moving parts in electronics and MEMS, cosmetics/hair products, and artificial human joints. Around the world, much research is currently being undertaken to develop new polymers, in different forms, for further enhancing tribological performance and for finding novel applications. Keeping in view the importance of tribology of polymers for research and technology as well as the vast literature that is now available in research papers and review articles, this timely book brings together a wealth of research data for an understanding of the basic principles of the subject.

Download or read book Development of Self Lubricating Composites Utilizing Carbonized Phenolic Matrix written by Melvin T. Lavik and published by . This book was released on 1975 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exploratory development and evaluation has been conducted on self-lubricating composites which utilize a carbonized phenolic resin (CPR) matrix. Composites have been prepared with as much as 38% (vol.) graphite fibers. Specimens have been compression-molded directly as journal liners within a metal housing or as blanks which can be machined into desired test configurations. Additives such as Sb2O3, ZnO, and tetrafluoroethylene powders have provided beneficial synergistic effects within the CPR-MoS2-fiber composites. Screening friction and wear tests have been conducted. The composites with more than 30% fiber performed better at the high loads than those with lower fiber content. Small quantities of tetrafluoroethylene powder (2%) effected a lower, more steady friction coefficient while maintaining a low wear rate. Oscillatory journal bearing tests have been conducted at loads from 2,000 to 10,000 psi at an average linear speed of 2.18 fpm (0.011 m/s) and at temperatures of 100, 400, and 600 F (311, 477, and 588 K). The composites containing 31% fibers exhibited much better wear resistance than composites with 18% fiber content. The wear factors of the better composites tended to decrease with increasing load and increasing temperature. Although the specific wear factors are higher by factors of 10 to 400 in oscillating journal tests than in flat-on-flat oscillatory tests, the radial wear is within the stated acceptable wear for control surface bearings in high load applications.

Download or read book Self Lubricating Polymer Composites and Polymer Transfer Film Lubrication for Space Applications written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-16 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of self-lubricating polymers and polymer composites in space is somewhat limited today. In general, they are only used when other methods are inadequate. There is potential, however, for these materials to make a significant impact on future space missions if properly utilized. Some of the different polymers and fillers used to make self-lubricating composites are surveyed. The mechanisms of composite lubrication and wear, the theory behind transfer film lubricating mechanisms, and some factors which affect polymer composite wear and transfer are examined. In addition, some of the current space tribology application areas for self-lubricating polymer composites and polymer transfer are mentioned. Fusaro, Robert L. Glenn Research Center...

Download or read book Tribological Applications of Composite Materials written by Mohamed Thariq Hameed Sultan and published by Springer Nature. This book was released on 2020-12-14 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the current advances and practices in tribological applications of composite materials under various processes, presenting the development, characterization, and morphological properties of composite materials in tribological applications. It covers a wide range of subjects, extending from fundamental research on the tribological characteristics of various multi-phase materials to the final applications of composites in wear loaded, technical components. It brings together contributions from researchers who discusses innovative experimental approaches and analytical techniques, creating a reference with comprehensive coverage of modern research techniques and the potential application of tribological composites in biomedical, aerospace, automotive, marines and construction industries. This volume will be of interest to material science researchers working in both industry and academia