Author: Mathew M. Swisher
Publisher:
ISBN:
Category :
Languages : en
Pages : 111
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Book Description
Diamond like carbon (DLC) is an attractive choice as a coating for mechanical components, because of its excellent wear resistance and very low coefficient of friction . We use molecular dynamics (MD) simulations with a reactive force field (ReaxFF) to study the friction and wear between DLC counterfaces, both in comparison to and in contact with steel counterfaces. We show that the tribological properties of DLC in dry sliding friction are heavily dependent on both the structure of the DLC as well as the passivation layer that forms on the sliding counterfaces under different environmental conditions, and that when optimizing for the lowest COF the best structure for the DLC depends on the type of passivation layer. We also find that, by preventing bonding across the counterfaces as the thin film of lubricant is squeezed out at the point of contact, the passivation layer is instrumental in the material's ability to resist scuffing and wear. Additionally, we find that the strength and hardness of DLC makes damaging the passivation layer due to contact forces unlikely under real world conditions. Finally, we use MD simulations to study in more detail the transition from lubricated to dry friction, and in particular, the role of DLC surface chemistry and the resulting passivation layer in this transition. Our work shows that the frictional force can be described quite accurately across the transition from pure slip ( dry friction) to the purely hydrodynamic regime using a simple model which superposes the two effects, provided it also accounts for any immobile fluid layers at the fluid-solid interface. We show that, for water lubrication, the transition from the pure slip to the purely hydrodynamic regime occurs at smaller lengthscales in DLC counterfaces compared with steel.
Author: Christophe Donnet
Publisher: Springer Science & Business Media
ISBN: 0387498915
Category : Technology & Engineering
Languages : en
Pages : 673
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Book Description
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.
Author: Yifei Mo
Publisher:
ISBN:
Category :
Languages : en
Pages : 187
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Book Description
Author: Peerawatt Nunthavarawong
Publisher: CRC Press
ISBN: 1000630137
Category : Technology & Engineering
Languages : en
Pages : 329
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Book Description
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.
Author: Kenneth Holmberg
Publisher: Elsevier
ISBN: 0080931464
Category : Technology & Engineering
Languages : en
Pages : 577
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Book Description
The surface coating field is a rapidly developing area of science and technology that offers new methods and techniques to control friction and wear. New coating types are continually being developed and the potential applications in different industrial fields are ever growing, ranging from machine components and consumer products to medical instruments and prostheses. This book provides an extensive review of the latest technology in the field, addressing techniques such as physical and chemical vapour deposition, the tribological properties of coatings, and coating characterization and performance evaluation techniques. Eleven different cases are examined in close detail to demonstrate the improvement of tribological properties and a guide to selecting coatings is also provided. This second edition is still the only monograph in the field to give a holistic view of the subject and presents all aspects, including test and performance data as well as insights into mechanisms and interactions, thus providing the level of understanding vital for the practical application of coatings. * An extensive review of the latest developments in the field of surface coatings* Presents both theory and practical applications* Includes a guide for selecting coatings
Author: Jianbin Luo
Publisher: Springer Science & Business Media
ISBN: 3642036538
Category : Technology & Engineering
Languages : en
Pages : 1040
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Book Description
"Advanced Tribology" is the proceedings of the 5th China International Symposium on Tribology (held every four years) and the 1st International Tribology Symposium of IFToMM, held in Beijing 24th-27th September 2008. It contains seven parts: lubrication; friction and wear; micro/nano-tribology; tribology of coatings, surface and interface; biotribology; tribo-chemistry; industry tribology. The book reflects the recent progress in the fields such as lubrication, friction and wear, coatings, and precision manufacture etc. in the world. The book is intended for researchers, engineers and graduate students in the field of tribology, lubrication, mechanical production and industrial design. The editors Jianbin Luo, Yonggang Meng, Tianmin Shao and Qian Zhao are all the professors at the State Key Lab of Tribology, Tsinghua University, Beijing.
Author: Ali Erdemir
Publisher: Elsevier
ISBN: 0444643141
Category : Computers
Languages : en
Pages : 575
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Book Description
Superlubricity - the state between sliding systems where friction is reduced to almost immeasurable amounts - holds great potential for improving both the economic and environmental credentials of moving mechanical systems. Research in this field has progressed tremendously in recent years, and there now exist several theoretical models, recognised techniques for computational simulations and interesting experimental evidence of superlubricity in practise. Superlubricity, Second Edition, presents an extensively revised and updated overview of these important developments, providing a comprehensive guide to the physical chemistry underpinning molecular mechanisms of friction and lubrication, current theoretical models used to explore and assess superlubricity, examples of its achievement in experimental systems, and discussion of potential future applications. Drawing on the extensive knowledge of its expert editors and global team of authors from across academia and industry, Superlubricity, Second Edition, is a great resource for all those with a need to understand, model or manipulate surface interactions for improved performance. - Fully expanded and updated to include the latest developments in the field, including a new section on liquid superlubricity - Highlights the key superlubricity theoretical models and reviews state of the art tools and techniques for superlubricity simulation - Includes information on the practical aspects and potential impact of superlubricity in moving mechanical systems ranging from nano/micro scales to meso/macro scales
Author: Kun Zhou
Publisher: CRC Press
ISBN: 1351123564
Category : Technology & Engineering
Languages : en
Pages : 552
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Book Description
Carbon Nanomaterials: Modeling, Design, and Applications provides an in-depth review and analysis of the most popular carbon nanomaterials, including fullerenes, carbon nanotubes, graphene and novel carbon nanomaterial-based membranes and thin films, with emphasis on their modeling, design and applications. This book provides basic knowledge of the structures, properties and applications of carbon-based nanomaterials. It illustrates the fundamental structure-property relationships of the materials in both experimental and modeling aspects, offers technical guidance in computational simulation of nanomaterials, and delivers an extensive view on current achievements in research and practice, while presenting new possibilities in the design and usage of carbon nanomaterials. This book is aimed at both undergraduate and graduate students, researchers, designers, professors, and professionals within the fields of materials science and engineering, mechanical engineering, applied physics, and chemical engineering.
Author: Arshia Fatemi
Publisher: expert verlag
ISBN: 3816985475
Category : Technology & Engineering
Languages : en
Pages : 526
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Book Description
The conference provides an international exchange forum for the industry and the academia. Leading university researchers present their latest findings, and representatives of the industry inspire scientists to develop new solutions.
Author: Andrew T. S. Wee
Publisher: World Scientific
ISBN: 9812839550
Category : Technology & Engineering
Languages : en
Pages : 268
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Book Description
Selected Topics in Nanoscience and Nanotechnology contains a collection of papers in the subfields of scanning probe microscopy, nanofabrication, functional nanoparticles and nanomaterials, molecular engineering and bionanotechnology. Written by experts in their respective fields, it is intended for a general scientific readership who may be non-specialists in these subjects, but who want a reasonably comprehensive introduction to them. This volume is also suitable as resource material for a senior undergraduate or introductory graduate course in nanoscience and nanotechnology.The review articles have been published in journal COSMOS Vol 3 & 4.
