scholarly journals Tribological Characteristics Improvement of Wear Resistant MAO-Coatings

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
V. N. Malyshev ◽  
A. M. Volkhin ◽  
B. M. Gantimirov
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Surface Layer ◽  
Erosion Resistance ◽  
Economic Effect ◽  
Microarc Oxidation ◽  
Tribological Characteristics ◽  
High Wear Resistance ◽  
Technology Improvement ◽  
Coating Formation

Currently, the most promising technology of coating formation is microarc oxidation (MAO) with unique properties of the surface layer, which combine high wear resistance, corrosion resistance, and heat and erosion resistance. Microarc oxidation can be used for parts and components manufacturing in various segments of industries. However, the technology improvement by improving the tribological characteristics of MAO-coatings can not only enhance economic effect, but also expand its application.

scholarly journals An Overview on the Tribological Performance of Titanium Alloys with Surface Modifications for Biomedical Applications

Lubricants ◽  
2019 ◽  
Vol 7 (8) ◽  
pp. 65 ◽  
Author(s):  
Kaur ◽  
Ghadirinejad ◽  
Oskouei
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Titanium Alloys ◽  
Weight Ratio ◽  
High Strength ◽  
Surface Modifications ◽  
Tribological Performance ◽  
The Body ◽  
High Wear Resistance ◽  
Medical Implants

The need for metallic biomaterials will always remain high with their growing demand in joint replacement in the aging population. This creates need for the market and researchers to focus on the development and advancement of the biometals. Desirable characteristics such as excellent biocompatibility, high strength, comparable elastic modulus with bones, good corrosion resistance, and high wear resistance are the significant issues to address for medical implants, particularly load-bearing orthopedic implants. The widespread use of titanium alloys in biomedical implants create a big demand to identify and assess the behavior and performance of these alloys when used in the human body. Being the most commonly used metal alloy in the fabrication of medical implants, mainly because of its good biocompatibility and corrosion resistance together with its high strength to weight ratio, the tribological behavior of these alloys have always been an important subject for study. Titanium alloys with improved wear resistance will of course enhance the longevity of implants in the body. In this paper, tribological performance of titanium alloys (medical grades) is reviewed. Various methods of surface modifications employed for titanium alloys are also discussed in the context of wear behavior.

Study On the Corrosion Resistance Properties of the Ceramic Coating Obtained Through Microarc Oxidation on the Aluminium Alloy Surface

2007 ◽  
Vol 353-358 ◽  
pp. 1733-1736 ◽  
Author(s):  
Fei Chen ◽  
Hai Zhou ◽  
Chen Chen ◽  
Fan Xiu Lu ◽  
Fan Xiu Lu
Keyword(s):  
Corrosion Resistance ◽  
Aluminium Alloy ◽  
Ceramic Coating ◽  
Microarc Oxidation ◽  
Electrochemical Corrosion ◽  
Nacl Solution ◽  
X Ray Diffraction ◽  
Micro Arc Oxidation ◽  
Coating Formation ◽  
Α Al2o3

Oxidation ceramic coating was directly synthesized on LY12 aluminium alloy by micro-arc oxidation (MAO) process in Na2SiO3 electrolyte solution with the Na2WO4-KOH-Na2EDTA addition. The corrosion resistance of the coating was tested using CS300P electrochemical corrosion workshop in 3.5% NaCl solution. Using the scanning electron microscopy (SEM) and X-ray diffraction (XRD), the cross-section microstructure, the surface morphology and the phase structure of the micro-arc oxidation ceramic coating were analyzed. The results showed that the corrosion resistance of the micro-arc oxidation ceramic coating in 3.5% NaCl solution was enhanced remarkably, the corrosion velocity was obviously slowed down. The thickness of micro-arc oxidation ceramic coating was about 11μm. The final phases in the coating were found to be α-Al2O3 and γ-Al2O3. The mechanism of the oxidation ceramic coating formation was investigated too.

Tribological Characteristics of Nano Structured Nickel Coatings for Renivating of Extruding Shafts

2012 ◽  
Vol 217-219 ◽  
pp. 221-225 ◽  
Author(s):  
Dimitar Karastoyanov ◽  
Todor Penchev ◽  
Mara Kandeva
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Contact Interaction ◽  
Dry Friction ◽  
Experimental Results ◽  
Tribological Characteristics ◽  
Resistance Testing ◽  
Temperature Changes ◽  
Wear Process ◽  
Nickel Coatings

The methods for wear resistance testing is described and the experimental results for the dependence of the massive wear, wear speed, intensity of wear and wear resistance on the friction road and the time of a contact interaction are obtained. A testing micromanipulator with piezo actuators for measuring the roughness of the surface layer is developed. A methodology for thermographic testing and experimental results for wear and temperature changes in the contact by the wear process of the coatings under dry friction and abrasion is obtained

Properties of Metallic Materials after Surface Self Nano-Crystallization

2014 ◽  
Vol 941-944 ◽  
pp. 416-420 ◽  
Author(s):  
Guang Yu Pei ◽  
Dong Li ◽  
Kai Bin Li
Keyword(s):  
Plastic Deformation ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Surface Layer ◽  
Severe Plastic Deformation ◽  
Compressive Stress ◽  
High Strength ◽  
Metallic Materials ◽  
Diffusion Property ◽  
Surface Nanocrystallization

Surface Self-nanocrystallization (SSNC) can produce nanometer grains (10~50μm depth) in the surface layer of metallic materials. And high strength, residual compressive stress as well as a mass of defects attributed to grain refinement and severe plastic deformation, greatly improve their surface properties, such as strength, wear resistance, diffusion property, fatigue performance and corrosion resistance. Now some methods have been confirmed which could realize surface nanocrystallization. This paper reviews the study of surface nanocrystallization and simply summarizes changes in their performance based on surface layer microstructure of metallic materials.

Tribotechnical properties of ultra-high molecular weight polyethylene filled with sulfur, diphenylguanidine and 2-mercaptobenzothiazole

2020 ◽  
pp. 91-98
Author(s):  
S. N. Danilova ◽  
A. A. Dyakonov ◽  
A. P. Vasiliev ◽  
Y. S. Gerasimova ◽  
A. A. Okhlopkova ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Molecular Weight ◽  
Wear Resistance ◽  
Surface Layer ◽  
Ir Spectroscopy ◽  
High Molecular Weight ◽  
High Wear Resistance ◽  
Carbonyl Groups ◽  
Tribotechnical Properties ◽  
Ultra High Molecular Weight

The paper studies tribotechnical properties, hardness and density of composites based on ultra-high molecular weight polyethylene (UHMWPE) filled with sulfur, diphenylguanidine (DFG) and 2-mercaptobenzothiazole (MBT) and their mixtures. It has been established that the introduction of selected fillers has practically no effect on hardness and density of the composites, but leads to a significant (by 2–3 times) increase in the wear resistance of materials. Using electron microscopy, it has been established that secondary structures are formed in composites containing MBT that protect the surface layer of the material from wear. Using IR spectroscopy, it was established that tribochemical reactions occur during the wear of composites with the formation of hydroxyl and carbonyl groups. The developed materials UHMWPE / MBT and UHMWPE / FGD / MBT have high wear resistance and can be used as materials for tribological purposes.

The Effect of Temperature on Wear Mechanism of the AlCrN Coated Components

2016 ◽  
Vol 674 ◽  
pp. 233-238 ◽  
Author(s):  
Michał Michalak ◽  
Remigiusz Michalczewski ◽  
Edyta Osuch-Słomka ◽  
Demófilo Maldonado-Cortés ◽  
Marian Szczerek
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
High Temperature ◽  
Oxide Layer ◽  
Wear Mechanism ◽  
Room Temperature ◽  
Optical Microscope ◽  
Effect Of Temperature ◽  
High Wear Resistance ◽  
Protective Oxide

The aim of the paper was to investigate the temperature effect on the wear mechanism of AlCrN coated components. The coating was deposited by Physical Vapour Deposition process (PVD) on WC/Co substrate. Tribological tests were performed in sliding conditions using high temperature T‑21 tribotester, produced by ITeE-PIB Radom. The tests were performed in a ball-on-disc configuration (Si3N4 ceramic ball), under dry friction conditions at room temperature, 600°C and 750°C. An optical microscope, interferometer, and scanning electron microscope were used to analyse the worn surfaces. Following this study, it was found that wear resistance of the coating AlCrN tribosystem depended on the temperature. The biggest wear was reported at room temperature. At 600°C the intensity of wear of the coating was 4-fold lower, and at 750°C wear was 6-fold lower that at room temperature. High temperature wear resistance of AlCrN coating involves creating protective oxide layer. Performed analysis of structure the surface layer, showed a much higher content of oxygen in wear scar than outside. At high temperatures, friction additional intensified oxidation process thus the amount of oxygen in surface layer increased with temperature. Oxide layer, Al2O3 and Cr2O3 probably, created at high temperature was a barrier to further oxidation of the coating and had very high wear resistance at high temperature.

Islet Nitriding of Product Surfaces Made from Alloy Steel

2017 ◽  
Vol 265 ◽  
pp. 215-220 ◽  
Author(s):  
N.K. Krioni ◽  
A.A. Mingazheva ◽  
A.Y. Kononova ◽  
A.D. Mingazhev ◽  
V.A. Gafarova
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
New Technologies ◽  
Nitrided Layer ◽  
Composite Layer ◽  
Thermochemical Treatment ◽  
High Wear Resistance ◽  
Thermochemical Method ◽  
Machine Parts ◽  
Modern Machine

One of the most urgent problems of modern machine engineering is to increase the wear resistance of machine parts. The appearance of new technologies of parts strengthening treatment and improvement of the existing ones, especially the technologies based on thermochemical method, remain quite sought-after and are successfully used to improve the operational properties of the parts. Parts surface layer nitriding as the most common method of improving the service life and reliability of the modern machine parts got a new quality due to the use of ion-plasma processes. At the same time, the ever-increasing requirements for performance of machines and devices of different purposes, intensification and tightening of the conditions for their operation requires the creation of new nitriding technologies to provide a range of required properties of parts surface materials. This article is dedicated to the development and research of new nitriding technologies for alloyed steel parts. The aim of the proposed nitriding technology is to provide a composite layer combining high wear resistance and ductility of surface layer material. A feature of the nitriding technology is creating the conditions of processes of thermochemical treatment of parts, making it possible to form the islet nitrided layer.

scholarly journals Special Issue Editorial: Functional Oxide Based Thin-Film Materials

Crystals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 195
Author(s):  
Dong-Sing Wuu
Keyword(s):  
Thin Film ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Chemical Stability ◽  
Dielectric Strength ◽  
High Wear Resistance ◽  
Special Issue ◽  
Oxide Coatings ◽  
High Corrosion Resistance ◽  
Protective Oxide

Protective oxide coatings, such as Al2O3 and Y2O3 coatings, are widely used in semiconductor industries because of their hardness, high wear resistance, dielectric strength, high corrosion resistance, and chemical stability for plasma chambers [...]

Enhancement of Reliability of Machines and Materials by Friction Plating

2008 ◽  
Vol 59 ◽  
pp. 46-50
Author(s):  
L. Belevskiy ◽  
Vladimir A. Popov ◽  
S.A. Tulupov ◽  
Oleg M. Smirnov
Keyword(s):  
Plastic Deformation ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Surface Layer ◽  
High Temperature ◽  
High Speed ◽  
Protective Coatings ◽  
Coating Material ◽  
Strong Adhesion ◽  
Modification Of The Surface

A process of friction plating was developed for modification of the surface of metal items by strain hardening combined with application of protective coatings aimed to improve corrosion resistance, hardness, wear resistance and other functional properties. Friction plating is performed by means of a metal wire brush rotating at high speed. Coating material in the form of a rod or strip is pressed with a certain force to the rotary wire brush. In the contact zone, coating material is heated up to a high temperature. Particles of coating material are picked up by the ends of brush wires and transferred onto the treated surface. At the same time, the surface of the product is conditioned and heated. Investigations of friction plating have shown that plastic deformation of the surface layer combined with application of coating material particles ensures their strong adhesion to the substrate.

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