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Behaviour Of Lubricant Additives On Dlc Coatings

Behaviour of Lubricant Additives on DLC Coatings PDF

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Author: Balasubramaniam Vengudusamy
Publisher:
ISBN:
Size: 29.38 MB
Format: PDF, ePub, Docs
Category :
Languages : en
Pages :
View: 5705

Book Description: Non-ferrous surfaces such as diamond-like carbon (DLC) coatings are becoming potential candidates for automotive engine parts because of fuel economy gains that these surfaces offer by operating with very low friction. In recent years, a wide range of DLC coatings have been developed and it is important to understand their film-forming, friction reduction and wear resistance mechanisms under lubricated conditions. This aim of the work described in this thesis is to improve our understanding of the tribological behaviour of DLC coatings with different engine oil additives. The main focus of the thesis is to study a wide range of available DLC coating types with currently available and widely-used additives such as ZDDP, friction modifiers, MoDTC etc., in order to establish general rules of their tribological behaviour that will help lubricant manufacturers produce new oil formulations. The research shows that tribofilms are formed on all DLCs by most of the currently used additives and that the film thickness depends on various factors such as type of DLC coating, doping elements present in the coatings, concentration of hydrogen and tungsten present in the coatings and the counterpart. Hydrogen-free coatings (a-C and ta-C) give lower boundary friction compared to the other coatings whereas hydrogenated amorphous carbon (a-C:H) coatings give better wear resistance properties. Study of a-C:H:W coatings shows that the concentration of tungsten present in the coatings has a significant influence on wear resistance properties but negligible influence on the friction properties when additives are present. The steel/steel couple is known to form a thick ZDDP tribofilm. If one of the contact surfaces is coated with DLC, the tribofilm forming properties on the steel vary and, for some cases, the low boundary friction properties of DLCs are degraded.


Advanced Analytical Methods In Tribology

Advanced Analytical Methods in Tribology PDF

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Author: Martin Dienwiebel
Publisher: Springer
ISBN: 3319998978
Size: 80.95 MB
Format: PDF, Kindle
Category : Technology & Engineering
Languages : en
Pages : 328
View: 4598

Book Description: This book presents the basics and methods of nanoscale analytical techniques for tribology field. It gives guidance to the application of mechanical, microstructural, chemical characterization methods and topography analysis of materials. It provides an overview of the of state-of-the-art for researchers and practitioners in the field of tribology. It shows different examples to the application of mechanical, microstructural, chemical characterization methods and topography analysis of materials. Friction and Wear phenomena are governed by complexe processes at the interface of sliding surfaces. For a detailed understanding of these phenomena many surface sensitive techniques have become available in recent years. The applied methods are atom probe tomography, in situ TEM, SERS, NEXAFS, in situ XPS, nanoindentation and in situ Raman spectroscopy. A survey of new related numerical calculations completes this book. This concerns ab-initio coupling, numerical calculations for mechanical aspects and density functional theory (DFT) to study chemical reactivity.


Tribology And Surface Engineering

Tribology and Surface Engineering PDF

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Author: Aleksander Lisiecki
Publisher: MDPI
ISBN: 3039280848
Size: 31.67 MB
Format: PDF
Category : Technology & Engineering
Languages : en
Pages : 174
View: 3641

Book Description: The book covers very important issues, not only scientific in nature but, ultimately, for industry and the economy. Wear and deterioration of surface properties during operation is a natural and unavoidable phenomenon. However, minimizing the degree of wear is of great importance for the entire economy, as illustrated by the example of the US economy, for which the loss of natural resources as a direct cause of friction and wear exceeds 6% of the Gross National Product. This book showcases the valuable knowledge revealed from both theoretical and practical research results in the field of advanced technologies of coatings and surface modification, as well as wear and tribological characteristics of advanced materials and surface layers. Therefore, it is hoped that this book will be a valuable resource and helpful tool for scientists, engineers, and students in the field of surface engineering, materials science, and manufacturing engineering.


Proceedings Of Asia International Conference On Tribology 2018

Proceedings of Asia International Conference on Tribology 2018 PDF

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Author: Mohd Fadzli Bin Abdollah
Publisher: Malaysian Tribology Society
ISBN: 9671362524
Size: 57.86 MB
Format: PDF, Docs
Category :
Languages : en
Pages : 518
View: 608

Book Description: This ebook is a compilation of 234 papers presented at the 6th Asia International Conference on Tribology (ASIATRIB2018): Kuching, Sarawak - Malaysia from 17 to 20 September 2018.


Advances In Tribology

Advances in Tribology PDF

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Author: Pranav H. Darji
Publisher:
ISBN: 953512742X
Size: 10.81 MB
Format: PDF, Mobi
Category :
Languages : en
Pages : 278
View: 830

Book Description:


Handbook Of Lubrication And Tribology Volume Ii

Handbook of Lubrication and Tribology  Volume II PDF

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Author: Robert W. Bruce
Publisher: CRC Press
ISBN: 1420069098
Size: 65.56 MB
Format: PDF, Docs
Category : Technology & Engineering
Languages : en
Pages : 1169
View: 6107

Book Description: Since the publication of the best-selling first edition, the growing price and environmental cost of energy have increased the significance of tribology. Handbook of Lubrication and Tribology, Volume II: Theory and Design, Second Edition demonstrates how the principles of tribology can address cost savings, energy conservation, and environmental pr


Journal Of Tribology

Journal of Tribology PDF

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Author:
Publisher:
ISBN:
Size: 63.12 MB
Format: PDF
Category : Tribology
Languages : en
Pages :
View: 4934

Book Description:


Metals Abstracts

Metals Abstracts PDF

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Author:
Publisher:
ISBN:
Size: 73.31 MB
Format: PDF
Category : Metallurgy
Languages : en
Pages :
View: 7333

Book Description:


Metals Abstracts Index

Metals Abstracts Index PDF

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Author:
Publisher:
ISBN:
Size: 79.79 MB
Format: PDF, ePub, Docs
Category : Metallurgy
Languages : en
Pages :
View: 178

Book Description:


Transient Processes In Tribology

Transient Processes in Tribology PDF

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Author: A A Lubrecht
Publisher: Elsevier
ISBN: 9780080474649
Size: 45.64 MB
Format: PDF, Docs
Category : Technology & Engineering
Languages : en
Pages : 892
View: 4650

Book Description: The papers contained within this volume focus on the transient aspects of the preocesses in tribology highlighting the differences obtained with stationery conditions, be they experimental analytical or numerical.