Surface and Tribological Characterization of Coatings for Friction and Wear Reduction

1993 ◽  
Author(s):  
Steven J. Simko ◽  
Maria C. Militello ◽  
Simon C. Tung
Keyword(s):  
Friction And Wear ◽  
Wear Reduction ◽  
Tribological Characterization

scholarly journals Structural, Mechanical, and Tribological Characterization of Magnetic Pulse Compacted Fe–Cu Bimetallic Particles Produced by Electric Explosion of Dissimilar Metal Wires

Metals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1287
Author(s):  
Alexander Pervikov ◽  
Anton Khrustalyov ◽  
Andrey Filippov ◽  
Yuri Mironov ◽  
Aleksander Lozhkomoev ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Sliding Friction ◽  
Electric Explosion ◽  
Magnetic Pulse ◽  
Bimetallic Particles ◽  
Wear Reduction ◽  
Sliding Test ◽  
Tribological Characterization ◽  
Metal Wires

Bimetallic 73 wt.% Fe–Cu nanoparticles have been produced using electric explosion of two immiscible metal wires and then consolidated into disks using magnetic pulse compaction. The compacted disks have been characterized for phase composition, mechanical strength, and high-temperature steel ball-on-disk sliding friction. The sample possessed good flexural and compression strength. Friction and wear reduction were observed during sliding test at 400 °C, which was explained by intense tribosynthesis of cuprospinel CuFe2O4 nanoparticles, which served to reduce adhesion between the ball and disk.

scholarly journals Production and Tribological Characterization of Tailored Laser-Induced Surface 3D Microtextures

Lubricants ◽  
2019 ◽  
Vol 7 (8) ◽  
pp. 67 ◽  
Author(s):  
Joel Voyer ◽  
Johann Zehetner ◽  
Stefan Klien ◽  
Florian Ausserer ◽  
Igor Velkavrh
Keyword(s):  
Friction And Wear ◽  
Wear Behavior ◽  
Pulsed Laser ◽  
Antifriction Coating ◽  
The Coefficient Of Friction ◽  
Tribological Characterization ◽  
Steel Substrates ◽  
Different Levels ◽  
Lubrication Conditions

The aim of the present study was firstly to determine the manufacturing feasibility of a specific surface 3D-microtexturing on steel through an ultra-short pulsed laser, and secondly to investigate the tribological properties under 2 different lubrication conditions: oil-lubricated and antifriction coated. The selected 3D-microtexture consisted of 2 different levels of quadratic micropillars having side dimensions of approximately 45 µm, heights of about 35 µm and periods of 80 µm. It was shown that the production of specific 3D-microtextures on steel substrates using an ultra-short pulsed laser was feasible, and that the reproducibility of the texture dimensions over the entire textured region was extremely good. Frictional investigations have shown that, in comparison to the benchmark (untextured samples), the 3D-microtextured samples do not induce any significant improvements in the coefficient of friction (COF) under oil-lubricated conditions, but that under antifriction coated conditions, significant improvements in the friction coefficients may be achieved. Wear-based tribological tests have shown that the antifriction coating on benchmark samples was completely depleted, which greatly influenced their friction and wear behavior, since steel-steel contact occurred during testing. For the 3D-microtexture, the antifriction coating was also partially depleted; however, it accumulated itself in the microtexture which acted as a potential lubricant reservoir.

Tribological Characterization of N 80A and 21-4N Valve Materials Against GGG-40 Seat Material Under Dry Sliding Conditions at Temperatures Up To 500 °C

2017 ◽  
Vol 139 (6) ◽  
Author(s):  
Sheikh Shahid Saleem ◽  
M. F. Wani
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Raman Spectroscopy ◽  
Friction Coefficient ◽  
Friction And Wear ◽  
Dry Sliding ◽  
Nimonic 80A ◽  
Tribological Characterization ◽  
Scanning Electron

Friction and wear studies of Nimonic 80A and 21-4N valve materials against GGG-40 under dry sliding conditions, at temperatures ranging from 50 °C to 500 °C, are presented in this paper. Friction coefficient was found to be continuously decreased with time for all tests with prominent running-in behavior seen in the 50 °C and 500 °C tests. Higher friction coefficient and wear were observed at 300 °C as compared to those at 50 °C and 500 °C. Formation of oxide Fe3O4, at 300 °C, was confirmed by Raman spectroscopy, which resulted in a higher friction coefficient and wear. Raman spectroscopy further revealed the presence of α-Fe2O3, hematite, in most cases, with the presence of oxides of Ni–Cr and Ni–Fe as well. Energy dispersive spectroscopy (EDS) results on the samples confirmed the same. Wear at 500 °C was found to be the least for both the valve materials with scanning electron microscopy (SEM) confirming the formation of well-developed glaze layers.

scholarly journals Tribological Characterization of the Jatropha Oil with hBN as an Additive

2020 ◽  
Vol 8 (10S2) ◽  
pp. 79-82
Keyword(s):  
Friction And Wear ◽  
Seed Oil ◽  
Jatropha Oil ◽  
Sliding Speed ◽  
Wear Characteristics ◽  
Test Speed ◽  
Pin On Disc ◽  
Jatropha Seed ◽  
Tribological Characterization

This study proposes the wear characteristics of the jatropha oil consisting ofhBNas nanoparticles. During the test, speed was varied at different rpm. The nanoparticles of 0.3% to 1.2% was mixed to the jatropha seed oil. All the experiment was accomplished on pin on disc tribometer. It has been observed that the nanoparticles of 0.6% ratio shows minimum coefficiecnt of friction and wear during all conditions. In terms of sliding speed, maximum wear of the material occurred at lower speeds for all the samples.

Topographical and tribological characterization of some ceramic and stainless steel brackets

2016 ◽  
Vol 58 (7-8) ◽  
pp. 608-611
Author(s):  
Violeta Merie ◽  
Viorica Ţărmure ◽  
Simion Haragâş ◽  
Andreea Pop
Keyword(s):  
Stainless Steel ◽  
Tribological Characterization

scholarly journals Investigation of the Tribological Performances of Graphene and WS2 Nanosheets as Additives for Perfluoroalkylpolyethers Under Simulated Space Environment

2021 ◽  
Vol 69 (2) ◽  
Author(s):  
Jia Ren ◽  
Kuiliang Gong ◽  
Gaiqing Zhao ◽  
Wenjing Lou ◽  
Xinhu Wu ◽  
...  
Keyword(s):  
Amorphous Carbon ◽  
Atomic Oxygen ◽  
Friction And Wear ◽  
Surface Oxidation ◽  
Space Environment ◽  
Composition And Structure ◽  
Before And After ◽  
Wear Reduction ◽  
Ws2 Nanosheets ◽  
Effects Of Irradiation On

AbstractThe tribological performances of perfluoroalkylpolyethers (PFPE) with graphene (Gr), WS2, and the mixture of Gr and WS2 (Gr + WS2) before and after ultraviolet (UV), atomic oxygen (AO), and proton (Pr) irradiations were investigated. The composition and structure of PFPE, Gr, WS2, and Gr + WS2 were also analyzed to understand the effects of irradiation on the tribological behaviors of PFPE with additives. The results indicated that serious deterioration and degradation of PFPE took place and Gr was transformed to amorphous carbon after Pr irradiation, and surface oxidation of WS2 occurred under the irradiations of AO and Pr. Moreover, compared to PFPE and PFPE additized with Gr and WS2, PFPE with the addition of Gr + WS2 exhibited excellent friction and wear reduction before and after UV and AO irradiations. Graphical Abstract

Production and tribological characterization of castor based biodiesel

2021 ◽  
Author(s):  
Deepak Kumar ◽  
Ajay Kumar ◽  
Amneesh Singla ◽  
Rishi Dewan
Keyword(s):  
Tribological Characterization

scholarly journals Tribological Behaviour of Graphene Nanoplatelets as Additive in Pongamia Oil

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 732
Author(s):  
Yeoh Jun Jie Jason ◽  
Heoy Geok How ◽  
Yew Heng Teoh ◽  
Farooq Sher ◽  
Hun Guan Chuah ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Graphene Nanoplatelets ◽  
Friction Reduction ◽  
Engine Oil ◽  
Protective Film ◽  
Tribological Behaviour ◽  
Wear Reduction ◽  
Pongamia Oil ◽  
Interacting Surfaces ◽  
Worn Surface

This study investigated the tribological behaviour of Pongamia oil (PO) and 15W–40 mineral engine oil (MO) with and without the addition of graphene nanoplatelets (GNPs). The friction and wear characteristics were evaluated in four-ball anti-wear tests according to the ASTM D4172 standard. The morphology of worn surfaces and the lubrication mechanism of GNPs were investigated via SEM and EDS. This study also focuses on the tribological effect of GNP concentration at various concentrations. The addition of 0.05 wt % GNPs in PO and MO exhibits the lowest friction and wear with 17.5% and 12.24% friction reduction, respectively, and 11.96% and 5.14% wear reduction, respectively. Through SEM and EDS surface analysis, the surface enhancement on the worn surface by the polishing effect of GNPs was confirmed. The deposition of GNPs on the friction surface and the formation of a protective film prevent the interacting surfaces from rubbing, resulting in friction and wear reduction.

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