TRIBOLOGICAL AND THERMOPHYSICAL PROPERTIES OF JATROPHA OIL CONTAINING TIO2 NANOPARTICLES

2020 ◽  
Author(s):  
Rajaganapathy C ◽  
Vasudevan D
Keyword(s):  
Tio2 Nanoparticles ◽  
Friction Reduction ◽  
Engine Oil ◽  
Material Surface ◽  
Wear Properties ◽  
Weight Percentage ◽  
Pin On Disc ◽  
The Coefficient Of Friction ◽  
Wire Method ◽  
Surface Examination

In this paper, an attempt was made, to evaluate the tribological performance of Jatropa oil with addition of nanoparticles, on wear reduction in Al 6082 and it was compared with SAE20W40 engine oil. Experiments were conducted with pure Jatropa oil with different weight percentage of TiO2 nanoparticles such as 0%, 0.1%, 0.3% and 0.5%. The coefficient of friction and specific wear rate of the Al specimens were found by using pin on disc tribo-meter as per ASTM G99 standards, at constant speed of 1m/s using different loads such as 20N, 40N and 60N. The experimental results indicated that the addition of TiO2 with Jatropa oil indicated good friction reduction and anti-wear properties, compared to SAE20W40 engine oil. The lubricant viscosity and thermal conductivity were measured using Redwood viscometer and Transient hot wire method. Surface analysis was done using scanning electron microscopy to the study surface morphology of pin material. Surface examination revealed that TiO2 Nanoparticles lead to smoother worn surfaces than commercial Engine oil SAE20W40.

scholarly journals Dry Sliding Wear Of Intra-Layer Curaua/Basalt Polyester Composites under Varying PV Conditions

2019 ◽  
Vol 9 (2S2) ◽  
pp. 331-333
Keyword(s):  
Sliding Wear ◽  
Hybrid Composites ◽  
Testing Machine ◽  
Wear Testing ◽  
Dry Sliding Wear ◽  
Wear Properties ◽  
Hybrid Fibers ◽  
Weight Percentage ◽  
Pin On Disc ◽  
Pin On Disk

An investigational analysis was conducted to study the effect of basalt/curaua hybrid composite focusing on wear properties. The hybrid composites are fabricated by resin transfer molding and the tests are conducted by pin on disk as per ASTM G99. Basalt/Curaua relative fiber weight percentage as 0/100,40/60, 60/40, 100/0 are fabricated and analyzed for abrasion wear resistance. Specimens are tested for the load of 50N at 1 m/s using Pin on Disc wear testing machine by varying abrading distance. Worn out surfaces of the abraded composites are studied by using scanning electron microscopy (SEM) and Fourier- transform infrared spectroscopy (FTIR). Roughness of the worn and pure surfaces is also accounted to measure significance of hybridization on tribological properties of the hybrid composites. Result shows that coefficient of friction is increasing in higher the curaua fiber in hybrid composites. Morphology evident the wear mechanism and internal compatibility of hybrid fibers.

Tribological Studies of Epoxy Composites With UHMWPE and MoS2 Fillers Coated on Bearing Steel: Dry Interface and Grease Lubrication

2020 ◽  
Vol 142 (5) ◽  
Author(s):  
Neha Singh ◽  
Sujeet K. Sinha
Keyword(s):  
Film Formation ◽  
Normal Load ◽  
Bearing Steel ◽  
Transfer Film ◽  
Wear Properties ◽  
Grease Lubrication ◽  
Pure Epoxy ◽  
Tribological Coatings ◽  
Pin On Disc ◽  
The Coefficient Of Friction

Abstract Epoxy with ultra-high molecular weight polyethylene (UHMWPE) and MoS2 fillers was coated on a bearing steel (SAE 52100). Frictional and wear properties of the coated samples in sliding contact were investigated on a pin-on-disc tribometer under a normal load of 10 N and a linear sliding speed of 1 m/s against a bearing steel ball. The optimized coating composition (72 wt% Epoxy + 7 wt% hardener + 18 wt% UHMWPE + 3 wt% MoS2) showed highly improved tribological properties compared to pure epoxy and other epoxy-based composites. There was 75% reduction in the coefficient of friction (COF) in the dry interfacial condition (COF reduced from 0.2 to 0.05) over pure epoxy and 80% reduction with grease as the lubricant. The specific wear-rate of the composite was lower by five orders of magnitude over that of pure epoxy. Other mechanical properties such as hardness, tensile strength, and Young's modulus of the composite showed increments of 86%, 121%, and 43%, respectively, with respect to those of pure epoxy. 2–3 wt% of MoS2 had drastic effects on improving strength and reducing friction and wear of the composites. For dry sliding, initial abrasive and adhesive wear mechanisms led to transfer film formation on the steel counterface, and the shearing was mainly within the transfer film. For the grease-lubricated case, a thin layer of grease helped in easy shearing, and the transfer film formation was avoided. This epoxy-based composite will have applications as tribological coatings for journal bearings.

Tribologische Charakterisierung von Polymerfasern unter Trockenreibung, Mischreibung und Hydrodynamik mittels einer optimierten Pin-on-Disc-Prüfmethode

2021 ◽  
Vol 68 (3-4) ◽  
Author(s):  
Regine Schmitz ◽  
Frank Haupert ◽  
Justus Rüthing ◽  
Michael Sigrüner ◽  
Nicole Strübbe
Keyword(s):  
Fiber Material ◽  
Test Method ◽  
Polymer Fibers ◽  
Test Sequence ◽  
Material Surface ◽  
Wear Properties ◽  
Line Load ◽  
Wear Rates ◽  
Single Fibers ◽  
Pin On Disc

Based on the conventional pin-on-disc test method, a tribology test rig was adapted and optimized regarding its ability to characterize polymer fibers. The method is explained and first applications in the field of tribological characterization of single fibers are presented. The test sequence to investigate the polymer fibers (diameters of only a few 100 µm) is generated in such a way that data can be recorded continuously as a function of time in the wear range from a few 10 µm to several 100 µm even during the first few minutes. The test mode starts by applying line load and dynamically progresses to area load by changing the contact area during the measurement. It is shown that single fibers can be characterized with respect to their friction and wear properties in different tribological systems. The dependence of the wear rates of fiber material, surface roughness of the counter bodies and lubrication rates is presented.

Fabrication and Characterization of Cold-Pressed and Sintered Aluminium - MWCNT Composites

2021 ◽  
Vol 1025 ◽  
pp. 60-68
Author(s):  
Vilas Gulabrao Dhore ◽  
Walmik S. Rathod ◽  
Kashinath N. Patil
Keyword(s):  
Weight Percent ◽  
Aluminium Matrix ◽  
Matrix Composites ◽  
X Ray Diffraction ◽  
Wear Properties ◽  
Weight Percentage ◽  
Multi Walled Carbon Nanotube ◽  
The Coefficient Of Friction ◽  
Cold Pressed

In the present article aluminium matrix composites were fabricated by cold pressing and sintering technique. Multi-walled carbon nanotube (MWCNT) with various weight percentage 0.5, 1.0, 1.5 and 2.0 were added as a reinforcement to aluminium (Al) matrix. A planetary ball mill was used for mechanical alloying and even dispersion of carbon nanotubes (CNTs) in aluminium matrix. Tin (Sn) with 1.0 weight percent was used in composite to incite the sintering. The sintering was carried out at 500°C inside a tube furnace in an argon atmosphere. The morphology and structure of CNT and Al-Sn-CNT composite was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy. The effect of MWCNT reinforcement on microhardness and wear properties of Al-Sn-CNT composite was investigated. The hardness of composites was improved significantly with increase in CNT fraction. The reduction in the coefficient of friction and improvement in the wear resistance of the Al-Sn-CNT composite was noticed with the increase in percentage of CNTs in the composite.

Wear analysis on EN8, EN9 and EN24

2017 ◽  
Vol 14 (3) ◽  
pp. 188-192
Author(s):  
Suraj R. ◽  
Jithish K.S.
Keyword(s):  
Wear Testing ◽  
Wear Behaviour ◽  
Wear Properties ◽  
Content Type ◽  
Wear Analysis ◽  
Use Wear ◽  
Specific Dimension ◽  
Pin On Disc ◽  
The Coefficient Of Friction ◽  
Time Required

Purpose This paper aims to present a comparative study of the wear properties of ferrous welded materials like EN8, EN9 and mild steel (MS). Design/methodology/approach The material is cut into specific dimension after hardfacing and is studied for the wear properties of the material. The wear testing is done on a pin-on-disc apparatus. The microhardness of the material is studied using the Vickers microhardness measuring apparatus. Findings The wear properties of ferrous welded materials like EN8, EN9 and MS are studied. It is found the MS has the least wear when compared to EN8 and EN9. The microhardness of MS is higher than EN8 and EN9, thus making it more wear-resistant than EN8 and EN9. The coefficient of friction in the dry sliding condition is found to be constant throughout the experiment. Research limitations/implications Major restriction is the amount of time required for use-wear analysis and replication experiments that are necessary to produce reliable results. These limitations mean that the analysis of total assemblages with the intention of producing specific results, especially of worked materials, is not feasible. Practical implications Generally, the complexity and rigour of the analysis depend primarily on the engineering needs and secondarily on the wear situation. It has been the author’s experience that simple and basic wear analyses, conducted in the proper manner, are often adequate in many engineering situations. Integral and fundamental to the wear analysis approach is the treatment of wear and wear behaviour as a system property. As a consequence, wear analysis is not limited to the evaluation of the effects of materials on wear behaviour. Wear analysis often enables the identification of nonmaterial solutions or nonmaterial elements in a solution to wear problems. For example, changes in or recommendations for contact geometry, roughness, tolerance and so on are often the results of a wear analysis. Originality/value The value of the work lies in the utility of the results obtained to researchers and users of the EN8, EN9 and EN24 material for their components.

Experimental Study on Friction and Wear Behaviors of Carbon Rubbing against Copper Material under Electric Current

2013 ◽  
Vol 423-426 ◽  
pp. 797-800 ◽  
Author(s):  
Tao Ding ◽  
Wen Jing Xuan ◽  
Yu Mei Li ◽  
Shu Fen Xiao
Keyword(s):  
Experimental Study ◽  
Electric Current ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Wear Volume ◽  
Wear Properties ◽  
Arc Erosion ◽  
Pin On Disc ◽  
The Coefficient Of Friction ◽  
Oxidation Wear

An experimental study on friction and wear properties of carbon strip rubbing against copper contact wire was carried out on a pin-on-disc frictional tester under electric current. The result indicates that the coefficient of friction slowly increases with increasing of electric current. The value of friction coefficient is low, generally not more than 0.125. The wear volume of pin specimen increases with increasing of electric current. The wear volume of pin specimen is very low, generally not more than 0.075g. Through observing the SEM morphology of worn specimens, it can be found that there are obvious pits of arc ablation and traces of melting metal on worn surface. Worn surfaces of the worn specimens are analyzed by an energy dispersive X-ray spectroscopy. It can be observed that the oxidation wear occurs in the frictional process due to arc erosion and significant temperature rise. Therefore the arc erosion and oxidation wear are a main wear mechanism accompanied by materials transferring in the process of electrical sliding friction.

Experimental studies on the tribological behaviour of engine oil (SAE15W40) with the addition of CuO nanoparticles

2014 ◽  
Vol 66 (2) ◽  
pp. 289-297 ◽  
Author(s):  
Manu V. Thottackkad ◽  
P.K. Rajendrakumar ◽  
K. Prabhakaran Nair
Keyword(s):  
Experimental Studies ◽  
Viscosity Coefficient ◽  
Cuo Nanoparticles ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Tribological Behaviour ◽  
Content Type ◽  
Weight Percentage ◽  
Pin On Disc ◽  
Percentage Basis

Purpose – This manuscript aims to deal with the tribological property variations of engine oil (SAE15W40) by the addition of copper oxide (CuO) nanoparticles on weight percentage basis. Design/methodology/approach – Experimental studies on the influence of CuO nanoparticles utilised as an additive in lubricating oil (SAE15W40) under boundary lubrication conditions have been carried out using a pin-on-disc machine in accordance with ASTM G-99 standard. The variation of viscosity, coefficient of friction, wear and settling of nanoparticles has been studied as a function of particle concentration in the lubricant. Findings – Results show that the frictional force and specific wear rate decrease with an increase in concentration of nanoparticles comes to a minimum at a specific concentration and then increases, showing the presence of an optimum concentration. With the increase in concentration of nanoparticles, the kinematic and dynamic viscosities, and the flash and fire points are found to increase. Originality/value – The use of CuO nanoparticles as additives to a moderate level is a very efficient means of improving the tribological properties of lubricating oils.

scholarly journals Dry Sliding Friction Analysis and Wear Behavior of Carbon Nanotubes / Vinylester Nanocomposites, Using Pin-on-Disc Test

2019 ◽  
Vol 70 (10) ◽  
pp. 3592-3596
Keyword(s):  
Carbon Nanotubes ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Wear Behavior ◽  
Dry Sliding ◽  
Wear Properties ◽  
Test Parameters ◽  
Pin On Disc ◽  
The Coefficient Of Friction ◽  
Dry Sliding Friction

Dry sliding friction and wear behavior of single-wall (SW) and multi-wall (MW) carbon nanotubes (CNTs)/ vinylester composite have been investigated, under several loads and sliding speeds. Three different contents (0.1, 0.15 and 0.2 wt. %) of SWCNT and MWCNTs have been dispersed into the vinylester resin in order to obtain polymer nanocomposites. The present study discusses the coefficient of friction, specific wear rate and friction stability of vinylester composites with different CNTs content, using a pin-on-disc test. The friction and wear experiments were carried out following 3 loads×3 speeds, as test parameters. The best combination of friction and wear properties was found with the nanocomposite containing 0.2 wt.% MWCNT. Keywords: carbon nanotubes, vinylester, friction, wear

Study of behaviour of aluminium oxide nanoparticles suspended in SAE20W40 oil under extreme pressure lubrication

2015 ◽  
Vol 67 (4) ◽  
pp. 328-335 ◽  
Author(s):  
Avinash A. Thakre ◽  
Animesh Thakur
Keyword(s):  
Coefficient Of Friction ◽  
Normal Load ◽  
Friction Reduction ◽  
Lubricating Oil ◽  
Extreme Pressure ◽  
Sliding Speed ◽  
Content Type ◽  
Base Oil ◽  
Pin On Disc ◽  
The Coefficient Of Friction

Purpose – The purpose of this paper is to include investigation on extreme pressure lubrication behaviour of Al2O3 nanoparticles suspended in SAE20W40 lubricating oil. Effects of nanoparticles size (40-80 nm) and its concentration (0-1 per cent) on the coefficient of friction is studied using pin-on-disc tribotester. Design/methodology/approach – Taguchi technique is used to optimize the process parameters for lower coefficient of friction. L18 orthogonal array involving six levels for one factor and three levels for remaining three factors is selected for the experimentation. The parameters selected for the study are sliding speed, normal load, nanoparticles size and its concentration in base oil. Findings – It has been found that the presence of nanoparticles in proper concentration shows excellent tribological improvement in frictional characteristics compared to the base oil. The optimal combination of the parameters for minimum coefficient of friction is found to be 0.8 per cent concentration of 60 nm sized Al2O3 nanoparticles, 1,200 rpm sliding speed and 160 N of normal load. The mechanism of friction reduction in presence of nanoparticles is investigated using scanning electron microscopy. Originality/value – This is the original work.

Friction and Wear Behaviour of Nanocrystalline Cobalt

2007 ◽  
Author(s):  
M. Shafiei ◽  
A. T. Alpas
Keyword(s):  
Grain Size ◽  
Friction And Wear ◽  
Surface Damage ◽  
Ambient Air ◽  
Wear Behaviour ◽  
Initial Surface ◽  
Wear Properties ◽  
Pin On Disc ◽  
The Coefficient Of Friction ◽  
Contact Surfaces

The friction and wear properties of nanocrystalline cobalt (nc Co) with a grain size of 20±5 nm and a hardness of 503±13 HV were studied using a pin-on-disc tribometer. Tests performed under unlubricated sliding conditions in ambient air showed that large tribolayer area covered the nc Co’s wear track. The oxygen concentration of the tribolayer was higher than that formed on contact surfaces of microcrystalline cobalt (mc Co) with a grain size of 16±3 μm and a hardness of 299±8 HV tested under the same conditions, due to the higher tendency of nc Co for oxidation. Higher rate of oxidational wear in nc Co resulted in higher initial surface damage in this material compared to the mc Co. Once the tribolayer was formed on top of the contact surfaces, a steady-state wear regime prevailed, reducing the coefficient of friction (COF) and the wear rate in this sample.

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