Self Lubricating Composites
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Self Lubricating Composites
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Author : Pradeep L. Menezes
language : en
Publisher: Springer Nature
Release Date : 2022-01-03
Self Lubricating Composites written by Pradeep L. Menezes and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-01-03 with Technology & Engineering categories.
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.
Tribology And Applications Of Self Lubricating Materials
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Author : Emad Omrani
language : en
Publisher: CRC Press
Release Date : 2017-11-06
Tribology And Applications Of Self Lubricating Materials written by Emad Omrani and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-11-06 with Technology & Engineering categories.
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.
Development Of Self Lubricating Composites Utilizing Carbonized Phenolic Matrix
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Author : Melvin T. Lavik
language : en
Publisher:
Release Date : 1975
Development Of Self Lubricating Composites Utilizing Carbonized Phenolic Matrix written by Melvin T. Lavik and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with categories.
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.
Development Of Self Lubricating Composites Utilizing Carbonized Phenolic Matrix Part Ii A Summary Report
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Author : Melvin T. Lavik
language : en
Publisher:
Release Date : 1976
Development Of Self Lubricating Composites Utilizing Carbonized Phenolic Matrix Part Ii A Summary Report written by Melvin T. Lavik and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with categories.
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 59% (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 at various loads and speeds. The composites with approximately 30 vol % fiber performed better at the high loads than those with lower fiber content. Oscillatory journal bearing tests have been conducted at loads from 2,000 to 12,000 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.
Self Lubricating Polymer Composites And Polymer Transfer Film Lubrication For Space Applications
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Author : National Aeronautics and Space Adm Nasa
language : en
Publisher:
Release Date : 2018-11
Self Lubricating Polymer Composites And Polymer Transfer Film Lubrication For Space Applications written by National Aeronautics and Space Adm Nasa and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-11 with categories.
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...
Friction Induced Vibrations And Self Organization
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Author : Michael Nosonovsky
language : en
Publisher: CRC Press
Release Date : 2013-08-09
Friction Induced Vibrations And Self Organization written by Michael Nosonovsky and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-08-09 with Science categories.
Many scientists and engineers do not realize that, under certain conditions, friction can lead to the formation of new structures at the interface, including in situ tribofilms and various patterns. In turn, these structures-usually formed by destabilization of the stationary sliding regime-can lead to the reduction of friction and wear. Friction-I
Wear Of Composite Materials
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Author : J. Paulo Davim
language : en
Publisher: Walter de Gruyter GmbH & Co KG
Release Date : 2018-09-24
Wear Of Composite Materials written by J. Paulo Davim and has been published by Walter de Gruyter GmbH & Co KG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-24 with Technology & Engineering categories.
Composite materials are engineered from two or more constituents with significantly altered physical or chemical properties within the finished structure. Due to their special mechanical and physical properties they have the potential to replace conventional materials. This volume discusses durability of composite materials, wear mechanisms and resistance.
Tribological And Microstructural Investigation Of The Pm200 Series Of Self Lubricating Composites
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Author :
language : en
Publisher:
Release Date : 1992
Tribological And Microstructural Investigation Of The Pm200 Series Of Self Lubricating Composites written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
Industrial Composites Optimization Methods And Tribological Considerations
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Author : Gurpreet Singh Saini
language : en
Publisher: CRC Press
Release Date : 2026-02-12
Industrial Composites Optimization Methods And Tribological Considerations written by Gurpreet Singh Saini and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2026-02-12 with Technology & Engineering categories.
This book recapitulates the significance of metal composites in modern sustainable industry, along with the critical review of process optimization techniques and tribological aspects for industrial and automotive applications. The book aims to cover all the topics relevant to the mechanical characteristics of metal matrix composites (MMCs) such as reinforcement types (particles, short fiber, and long or continuous fibers), their effect on the microstructure of composites, and significance in enhancing the materials’ mechanical and physical properties. The first two chapters aim to provide detailed learning about recent industrial advancements of diverse metal composites: aluminum, copper, and magnesium, and their significance in the modern workable industry. The next two chapters highlight a detailed analysis of particle, short-fiber, and continuous-fiber materials used for composite fabrication. Further chapters discuss the behavior of composites under various testing conditions, process optimization techniques, tribological technologies, lubrication knowledge including additives and lubricants, and improvements to the tribological properties of MMCs for industrial and automotive applications. Industrial Composites, Optimization Methods, and Tribological Considerations is an essential book for experts, scientists, and engineers who are involved in the domain of composite materials, tribology, and process optimization.
Cvd Method Of Forming Self Lubricating Composites
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Author :
language : en
Publisher:
Release Date : 1998
Cvd Method Of Forming Self Lubricating Composites written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
An article having a multiphase composite lubricant coating of a hard refractory matrix phase of titanium nitride dispersed with particles of a solid lubricating phase of molybdenum disulfide is prepared by heating the article to temperatures between 350.degree. and 850.degree. C. in a reaction vessel at a reduced pressure and passing a gaseous mixture of Ti((CH.sub. 3).sub. 2 N).sub. 4, MoF.sub. 6, H.sub. 2 S and NH.sub. 3 over the heated article forming a multiphase composite lubricant coating on the article.