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.

Short term tribological behavior of ceramic and polyethylene biomaterials for hip prosthesis

2021 ◽  
Vol 63 (5) ◽  
pp. 470-473
Author(s):  
Subramaniam Shankar ◽  
Rajavel Nithyaprakash ◽  
Balasubramaniam Rajasulochana Santhosh
Keyword(s):  
Silicon Nitride ◽  
Friction And Wear ◽  
Hip Prosthesis ◽  
Tribological Behavior ◽  
Ceramic Materials ◽  
Blood Stream ◽  
Wear Characteristics ◽  
Polyether Ether Ketone ◽  
Spherical Ball ◽  
Pin On Disc

Abstract Reduction in wear of artificial bio-implants results in the release of a lesser amount of wear particles into the blood stream. This paper focuses on analyzing the tribological behavior of ceramic and polyethylene bio-materials experimentally. Four different biomaterials namely Zirconia, Silicon Nitride, UHMWPE (ultra high molecular weight polyethylene) and PEEK (polyether ether ketone) are investigated for friction and wear coefficients using a pin on disc (PoD) tribometer. Alumina (Al2O3) is chosen as the disc material. Polyethylene based UHMWPE and PEEK are used as a pin material with the hemispherical end, while, Zirconia and Silicon Nitride ceramic materials are used in the form of spherical ball. 0.9 % NaCl (saline solution) is used as a lubricant medium. Zirconia showed a better reduction in friction and wear coefficient characteristics under lubrication conditions when compared with polyethylene and other ceramic materials. The estimated friction and wear coefficients would be helpful for surgeons and academicians to choose better wear-resistant bio-compatible materials for effectively design hip prosthesis. The present study compared the tribological behaviors of ceramic materials Si3N4 and ZrO2 and polyethylene materials PEEK and UHMWPE with a ceramic counterpart Al2O3 disc. In the lubrication case, ZrO2 showed a better reduction in friction and wear characteristics while in the dry case UHMWPE showed lesser wear characteristics.

scholarly journals Preparation and Characterization of Biodiesel Produced from Jatropha Seed Oil Using Sulphated Zirconia as Catalyst

2018 ◽  
Vol 04 (01) ◽  
Author(s):  
Dangoggo SM ◽  
Dhikrah I ◽  
Sani NA ◽  
Baki AS ◽  
Bagudo BU ◽  
...  
Keyword(s):  
Seed Oil ◽  
Sulphated Zirconia ◽  
Jatropha Seed

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.

Effect of Phosphorus on the Friction and Wear Characteristics of Cu-Sn-P Alloys

1979 ◽  
Vol 101 (2) ◽  
pp. 201-206 ◽  
Author(s):  
Y. Taga ◽  
K. Nakajima
Keyword(s):  
Photoelectron Spectroscopy ◽  
Friction And Wear ◽  
Structural Changes ◽  
Surface Concentration ◽  
Wear Characteristics ◽  
X Ray ◽  
The Matrix ◽  
Pin On Disc ◽  
The Coefficient Of Friction ◽  
Friction And Wear Characteristics

The effects of phosphorus on the friction and wear characteristics of Cu-5 at. percent Sn-P alloys containing 1–5 at. percent P were studied using a pin on disc apparatus. The results showed that the decrease in both the coefficient of friction and the rate of wear became conspicuous with the increase in quantity of Cu3P coexisting in the matrix; its amount increases with the content of phosphorus. The structural changes in the surface of the specimen due to heating in a vacuum were observed by using Auger electron spectroscopy and X-ray photoelectron spectroscopy. It was seen that the surface concentration of phosphorus strongly increased after heating at 573K, whereas the diffusion of tin atoms was markedly retarded. It was concluded from these results that the behavior of phosphorus atoms in the surface during sliding played an important role in the friction and wear characteristics of Cu-Sn-P alloys.

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.

Comparative Study of Unprotected vs. Protected Surfaces Using an Innovative Process for Applying Solid Lubricants to Reduce Friction and Wear

Tribology ◽  
2005 ◽  
Author(s):  
Jane E. Buehler ◽  
K. Dean Bowles
Keyword(s):  
Coefficient Of Friction ◽  
Friction And Wear ◽  
Solid Lubricants ◽  
Wear Coefficient ◽  
Sliding Speed ◽  
Speed Test ◽  
Speed Condition ◽  
Test Conditions ◽  
Pin On Disc ◽  
Lower Load

Two tribocouples were compared neat vs. treated with Induratec™. The tribocouples, tested under dry sliding conditions via a pin-on-disc tribometer, were 52100 steel ball on 52100 steel disc and 8620 steel pin on C67300 bronze disc. Comparisons of coefficient of friction and wear coefficient, K (mm3/N m) are presented. For the 52100 tribocouple two test conditions were completed, a 9.8 N load at 0.75 m/s and a 29.4 N load at 2.0 m/s. The coefficient of friction, for the treated samples compared to the untreated samples, was reduced by 74% for the lower load and speed condition and by 79% for the higher load and speed condition. For the lower load and speed test condition, the wear coefficient was reduced by a factor of 55 and for the higher load and speed condition the wear coefficient was reduced by a factor of 887. For the 8620 steel pin on C67300 bronze disc, two test conditions were completed, a 9.8 N load at 2.5 m/s sliding speed and a 19.6 N load also at 2.5 m/s sliding speed. The treated surface had a 42% lower coefficient of friction at the 9.8 N load and a 57% lower coefficient of friction at the 19.6 N load. The treated tribocouple wear coefficient was reduced by a factor of 600 for the 9.8 N load and by a factor of 1733 for the 19.6 N load.

scholarly journals Friction and wear characteristics of robust carbon-carbon composites developed solely from petroleum pitch without reimpregnation

Friction ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 945-956 ◽  
Author(s):  
Shishobhan Sharma ◽  
Bharat Patel ◽  
Rasmika Patel
Keyword(s):  
Friction And Wear ◽  
Polarized Light ◽  
Single Step ◽  
Petroleum Pitch ◽  
Wear Characteristics ◽  
Pin On Disc ◽  
Electron Microscopes ◽  
Result Analysis ◽  
Scanning Electron Microscopes ◽  
Friction And Wear Characteristics

Abstract Friction and wear characteristics correlating the fiber reinforcement percentage of carbon-carbon (C/C) composites solely developed from petroleum pitch matrices were investigated. This study exhibits the tribo-characteristics of C/C composites developed in a single-step carbonization process for varying loads for the first time without a reimpregnation process. A pin-on-disc tribometer with a sliding speed of 0.5 m/s and loads of 5, 10, and 20 N with a flat tool grade stainless steel pin as a static partner was employed. Further, polarized light optical and scanning electron microscopes (SEM) were utilized for a morphological analysis. Elastic modulus and strength were determined by a compression test. A result analysis is conducted to analyze sliding wear accompanied with minor abrasion. The composites with a high percentage of reinforcement exhibit credible wear resistance and mechanical robustness.

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