Download or read book Development and Evaluation of NiW Alloy and NiW TiO2 Composite Coatings on the Mechanical Properties Tribological Performance and the Corrosion Resistance of Bearing Steel written by Arindam Paul and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2016 it was estimated that corrosion related costs were 3.4% of global GDP. Coatings are widely used for preventing or controlling corrosion. However, none of the currently used corrosion resistant coatings provides enough wear resistance for gears and bearing applications. Poor surface morphology of the corrosion resistant coatings cause increased wear and friction, resulting in early failure of the rolling element. Developing electrodeposited alloy coatings that promote synergy with additives used in gear and engine oils, while providing corrosion resistance can be a viable solution. Alloyed metals provides superior properties (like hardness, physical, chemical, magnetic) compared to pure metals, even at a nanoscale. Ni-W alloy was recently been reported to have unique contribution to mechanical, tribological and corrosion resistant performance. In addition, Ni was found to promote the formation of a thicker and durable lubricating layer. However, careful evaluation of in-service life of these alloy coatings are needed. Composite nanoparticles in many cases can also improve tribological performance of the component. Researchers have studied the effect of such nanoparticles on the tribological performance of oils. Both beneficial and detrimental effect of such nanoparticles has been reported. In this study NiW alloy and NiW-TiO2 composite coatings were electrodeposited on SAE 52100 steel coupons. Pulsed reversed current (PRC) electrodeposition technique is used due to its capability of producing more dense and uniform coating. Also, incorporating TiO2 nanoparticles on the NiW matrix is hypothesized to enhance the hardness and corrosion resistance. Both NiW alloy and NiW-TiO2 coated disks were tested in fully formulated oil and mineral oil provided by John Deere. Tribological performance was evaluated in both sliding and rolling condition. Corrosion resistance property were measured in 3.5% NaCl. Sliding performance were tested using High Frequency Reciprocating Rig (HFRR), rolling performance were tested using 3 ball-on-rod rolling contact fatigue tribometer (RCF) and micro pitting rig (MPR) under boundary lubricated condition. Compositional, elemental and wear tracks analysis were done using 3D interferometer, X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), X-ray fluorescence (XRF), Raman spectroscopy and optical microscopy. Hardness measurement were done using a Nanoindentor.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metals Abstracts written by and published by . This book was released on 1998 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electrodeposition of Composite Materials written by A.M.A Mohamed and published by BoD – Books on Demand. This book was released on 2016-03-23 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanocomposite coatings have various properties that can be utilized for corrosion protection and tribological improvements. Synthesis of the nanocomposite coatings using an electrodeposition method allows unique control of the experimental parameters. By fine tuning the experimental parameters, various compositions and properties can be obtained for the nanocomposite coatings. This book covers some of the electrochemical methods used for nanocomposite coating deposition as well as discusses in detail examples of several nanocomposite coating. The corrosion and tribological performance of the nanocomposite coatings are also covered and some nanocomposite coatings are discussed for specific technological areas, such as fuel cells and microelectronics.

Download or read book Tribology and Characterization of Surface Coatings written by Sarfraj Ahmed and published by John Wiley & Sons. This book was released on 2022-01-07 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRIBOLOGY AND CHARACTERIZATION OF SURFACE COATINGS The book provides updated information on the friction and wear behavior of coatings used in various industrial applications. Surface modification is a cost-effective process of increasing the life of components so that the whole device need not be changed if the surface is worn out. The tribological behavior of biological implants is currently an active topic and a thorough discussion is one of the book’s features. Tribology and Characterization of Surface Coatings explores key issues which are important in the research and development of surface coatings by providing updated information on friction and wear behavior of coatings used in different industrial applications. It covers the various coating deposition techniques, tribological response of nanocomposite coatings, multilayer hardfacing, and wear testing methods for coatings at nanoscale. The use of nanostructures may alter the tribological, characterization, and mechanical properties of the materials. Thermal spraying is the most widely used technique in industry for the deposition of coatings and their tribological properties need to be determined. This book also includes the recent trends in biotribology and the materials used in implants to counter the abrasive wear. Audience The book will serve as a reference to researchers, scientists, academicians, industrial engineers, and students who work in the fields of materials/polymer science and mechanical engineering. Apart from their applications to aerospace and electronics industries, the coatings are also used in the field of biomedical engineering.

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microstructure Characterization Corrosion and Wear Resistance of Duplex Electrodeposited Ni P Ni B TiO2 Sol enhanced Nano composite Coating written by Sina Sheikholeslami and published by . This book was released on 2017 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion and wear are responsible for more than 90% of metals failure in industries. Therefore, it is imperative to overcome the detriment caused by these phenomena to save costs, materials resources, manpower and energy efficiency. Applying coatings is one of the most efficient methods to combat wear and corrosion. Among different coating methods, electrochemical deposition is the most common and appreciated method due to its simple application technique and low cost. For the coating material selection, there are many available options that are compatible with electrodeposition methods. Nickel is one of the major preferences, since it has both good corrosion resistance and mechanical properties compared to other materials. To improve the coating characteristics, several developments have been introduced and investigated. This research considers doping enforcing particles into the coating to create a composite. Compared with conventional coatings, composite coatings have exquisite properties. If the size of doping particles decreases and their dispersion through the coating improves, then the overall properties of the coating are enhanced. Thus, instead of simple composite coatings, micro and nano-composite coatings have been developed. Moreover, the development of the coating itself is not the only relevant issue. In fact, each type of coating is mostly effective against either corrosion attacks or wear. In the electrodeposited nickel coatings category, high concentration phosphorous Ni-P coating is believed to have the ultimate corrosion resistance. Ni-B was believed to be the best coating in terms of tribological behavior. This research group has determined that sol-enhanced nano-composite Ni-B-TiO2 coating is the best coating to protect the surface against wear. However, none of the mentioned coatings can effectively withstand both corrosion and wear at the same time. Facing the problem mentioned above, an idea to create a special coating that can be effective both ways was presented and considered as the provision of the current study. The idea was to simply apply a multilayer coating instead of a single-layer one. The multilayer coating was set to consist of two main layers: The first layer, or the inner layer, is to be deposited on the surface of the substrate to be the corrosion-resistance layer. The second layer, or the outer layer, is to be applied on the top of the first layer to act as a wear resistance shield. For the first layer, high-content phosphorous Ni-P coating and for the second layer, sol-enhanced nano-composite Ni-B-TiO2 coating were selected, respectively. The deposition method for the Ni-P coating was electroless plating and for the sol-enhanced nano-composite Ni-B-TiO2 coating, electroplating was conducted. Optimum sol-enhancement parameters were extracted and used from the published results of a previous study from our research group. To make comparison and investigate the enhancement in properties, along with the duplex Ni-P/NiB-TiO2 coating sample, mono-layer Ni-P and Ni-B-TiO2 coating samples were also prepared for further analysis. It was observed that the microstructure of each layer within the duplex coating is not affected by the duplex coating process and remains identical to the mono-layer coating with the same chemical composition. The XRD-EDS revealed that the chemical composition of the inner and outer layers did not change and remained as single-layer Ni-P and Ni-B-TiO2.The outer layer in the duplex coating was completely the same as the mono-layer Ni-B-TiO2 nano-composite coating with almost the same hardness and grain size. In addition, wear resistance for the duplex coating was reported to be approximately the same as the single layer Ni-B-TiO2 coating and much better than the Ni-P coating. There was also an astonishing result from comparing corrosion behavior between Ni-P and sol-enhanced Ni-B-TiO2 nano-composite coatings. No previous study compared the properties of high-concentration Ni-P coatings and sol-enhanced Ni-B-TiO2 nano-composite coatings. This study has revealed that although Ni-P coatings are generally better than Ni-B coatings in terms of corrosion resistance, the corrosion resistance of this Ni-B-TiO2 coating is slightly better than the high content Ni-P coating, given the current study specifications. However, the ultimate result of this study was to identify the duplex Ni-P/Ni-B-TiO2 coating as having the best corrosion resistance among itself, Ni-P and Ni-B-TiO2 coating samples. It was concluded that while having the same corrosion potential as single layer Ni-B-TiO2 coating, the duplex Ni-P/Ni-B-TiO2 coating has almost 10 times lower corrosion current density and thus, its corrosion kinetic rate is much slower in comparison to other coating samples. Hence, we believe the duplex coating with both good wear resistance and corrosion protection will have great application prospect in a wide range of industries.

Download or read book Nanolubricants written by Jean Michel Martin and published by John Wiley & Sons. This book was released on 2008-04-30 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: The technology involved in lubrication by nanoparticles is a rapidly developing scientific area and one that has been watched with interest for the past ten years. Nanolubrication offers a solution to many problems associated with traditional lubricants that contain sulphur and phosphorus; and though for some time the production of nanoparticles was restricted by the technologies available, today synthesis methods have been improved to such a level that it is possible to produce large quantities relatively cheaply and efficiently. Nanolubricants develops a new concept of lubrication, based on these nanoparticles, and along with the authors’ own research it synthesises the information available on the topic of nanolubrication from existing literature and presents it in a concise form. Describes the many advantages and potential applications of nanotechnology in the tribological field. Offers a full review of the state-of-the-art as well as much original research that is yet unpublished. Includes sections on boundary lubrication by colloïdal systems, nanolubricants made of metal dichalcogenides, carbon-based nanolubricants, overbased detergent salts, nanolubricants made of metals and boron-based solid nanolubricants and lubrication additives. Authored by highly regarded experts in the field with contributions from leading international academics. Nanolubricants will appeal to postgraduate students, academics and researchers in mechanical engineering, chemical engineering and materials science. It should also be of interest to practising engineers with petroleum companies and mechanical manufacturers.

Download or read book Metals Abstracts Index written by and published by . This book was released on 1995 with total page 1390 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coatings Tribology written by Kenneth Holmberg and published by Elsevier. This book was released on 2009-03-18 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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

Download or read book Coatings Tribology written by K. Holmberg and published by Elsevier. This book was released on 1994-07-15 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a general view on thin surface coatings used for tribological applications and it is based on the current state of understanding. The mechanisms of friction and wear in sliding and rolling contacts of coated surfaces are described. Basic information on coating techniques, tribology and surface mechanisms is given. Based on collected experimental works information is given on the properties of thin soft coatings, such as polymer, lamellar solid and soft metal coatings; thin hard coatings, such as nitride, carbide, oxide, boride and diamond and diamond-like coatings; and multi-component and multi-layer coatings. The influence of interface layers and lubricants is highlighted. The methods available for characterization of coated surfaces and for mechanical and chemical evaluation of their tribological properties are described. Tribological evaluation methods for accelerated and field testing and the need for standardization of quality assurance procedures are discussed. A methodology for the selection of thin coatings for tribological applications is presented and knowledge based expert system approaches for coating selection are reviewed. For different application examples, the basic tribological contact mechanisms are described and the possibilities for improving their tribological properties by using surface coatings are discussed. The application examples include sliding and rolling bearings, gears, tools for cutting and forming, erosion resistant applications, magnetic recording systems and bio-medical implants.

Download or read book Ceramic Abstracts written by and published by . This book was released on 1998 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cold Spray Technology written by Anatolii Papyrin and published by Elsevier. This book was released on 2006-10-04 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: The topic of this book is Cold Spray technology. Cold Spray is a process of applying coatings by exposing a metallic or dielectric substrate to a high velocity (300 to 1200 m/s) jet of small (1 to 50 μm) particles accelerated by a supersonic jet of compressed gas. This process is based on the selection of the combination of particle temperature, velocity, and size that allows spraying at the lowest temperature possible. In the Cold Spray process, powder particles are accelerated by the supersonic gas jet at a temperature that is always lower than the melting point of the material, resulting in coating formation from particles in the solid state. As a consequence, the deleterious effects of high-temperature oxidation, evaporation, melting, crystallization, residual stresses, gas release, and other common problems for traditional thermal spray methods are minimized or eliminated. This book is the first of its kind on the Cold Spray process. Cold Spray Technology covers a wide spectrum of various aspects of the Cold Spray technology, including gas-dynamics, physics of interaction of high-speed solid particles with a substrate as well as equipment, technologies, and applications. Cold Spray Technology includes the results of more than 20 years of original studies (1984-2005) conducted at the Institute of Theoretical and Applied Mechanics of the Siberian Division of the Russian Academy of Science, as well as the results of studies conducted at most of the research centres around the world. The authors' goal is threefold. The first goal is to explain basic principles and advantages of the Cold Spray process. The second goal is, to give practical information on technologies and equipment. The third goal is to present the current state of research and development in this field over the world. The book provides coverage and data that will be of interest for users of Cold Spray technology as well as for other coating experts. At the present time the Cold Spray method is recognized by world leading scientists and specialists. A wide spectrum of research is being conducted at many research centres and companies in many countries. New approach to spray coatings Results are exceptionally pure coatings Low spray temperature without degradation of powder and substrate materials High productivity, high deposition efficiency High operational safety because of absence of high temperature gas jets, radiation and explosive gases Excellent thermal and electrical conductivity Wide spectrum of applications because of important advantages of the process

Download or read book Tribological Behavior of Functional Surface written by Pawel Pawlus and published by MDPI. This book was released on 2021-08-31 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Material loss due to wear and corrosion and high resistance to motion generate high costs. Therefore, minimizing friction and wear is a problem of great importance. This book is focused on the tribological behavior of functional surfaces. It contains information regarding the improvement of tribological properties of sliding elements via changes in surface topography. Tribological impacts of surface texturing depending on the creation of dimples on co-acting surfaces are also discussed. The effects of various coatings on the minimization of friction and wear and corrosion resistance are also studied. Friction can be also reduced by introducing a new oil.

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1994 with total page 1036 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tribocorrosion Mechanisms in Laser Deposited Titanium based Smart Composite Coatings written by Babatunde Abiodun Obadele and published by . This book was released on 2014 with total page 890 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aims to produce and improve the tribocorrosion property of Ti6Al4V by means of laser surface cladding with Ni and ZrO2. The results of this study would be useful for the design of high performance components for chemical and oil industry and potential applications in other engineering fields. The aim would be achieved through the following objectives: 1. Synthesize and characterise Ti, Ti-Ni and Ti-Ni-ZrO2 admixed powders. 2. Explore the feasibility of laser surface treatment of Ti6Al4V with Ti, Ti-Ni and Ti-Ni-ZrO2. 3. Investigate possible metallurgical interactions and phenomenon during and after laser surface cladding of the composite. 4. Evaluate the microstructural and mechanical properties of Ti based composites in terms of hardness. 5. Analyze the interaction between wear and corrosion wear as well as tribocorrosion resistance of the alloys and composites after laser surface cladding in 3.5 % NaCl and 1M H2SO4 environments.

Download or read book New Generation Coatings for Metals written by Anthony E. Hughes and published by MDPI. This book was released on 2020-11-09 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent decades, there have been extensive developments in science and technology. These advances provide new techniques to deposit coatings onto various substrates, thus, addressing the ever-increasing performance requirements of various applications. Moreover, as technology itself develops, there are new problems that require new solutions, some of which can be solved through the application of coatings. Thus, the demands from coatings are continually increasing and the field is growing. The collection of articles contained within this volume cover a wide range of different research approaches to coatings reflecting the expanding field of coatings. It covers examples from topics such as a cold spray of magnesium alloys onto steel substrates, mechanical coatings of Ti-based materials onto steel balls, electroless plating of Ni-P coating onto an Mg-based alloy, magnetron sputtering of Ru-Zr coatings onto a Si wafer, a review of ionic liquids that form surface layers, as corrosion inhibitors, nano-composite epoxy coatings containing exfoliated clay (montmorillonite) for steel protection, a coating based on plasma electrolytic oxidation of an aluminum alloy and inhibited epoxy primer for aerospace aluminum alloys. This volume provides a wide-angle snapshot of current coating technologies through the presentation of some specific studies.