Influence of boric acid additive size on green lubricant performance

2010 ◽  
Vol 368 (1929) ◽  
pp. 4851-4868 ◽  
Author(s):  
Michael R. Lovell ◽  
M. A. Kabir ◽  
Pradeep L. Menezes ◽  
C. Fred Higgs
Keyword(s):  
Boric Acid ◽  
Canola Oil ◽  
Friction And Wear ◽  
Vortex Generator ◽  
Green Manufacturing ◽  
Ambient Conditions ◽  
Wear Performance ◽  
Pin On Disc ◽  
Average Size ◽  
20 Nm

As the industrial community moves towards green manufacturing processes, there is an increased demand for multi-functional, environmentally friendly lubricants with enhanced tribological performance. In the present investigation, green (environmentally benign) lubricant combinations were prepared by homogeneously mixing nano- (20 nm), sub-micrometre- (600 nm average size) and micrometre-scale (4 μm average size) boric acid powder additives with canola oil in a vortex generator. As a basis for comparison, lubricants of base canola oil and canola oil mixed with MoS 2 powder (ranging from 0.5 to 10 μm) were also prepared. Friction and wear experiments were carried out on the prepared lubricants using a pin-on-disc apparatus under ambient conditions. Based on the experiments, the nanoscale (20 nm) particle boric acid additive lubricants significantly outperformed all of the other lubricants with respect to frictional and wear performance. In fact, the nanoscale boric acid powder-based lubricants exhibited a wear rate more than an order of magnitude lower than the MoS 2 and larger sized boric acid additive-based lubricants. It was also discovered that the oil mixed with a combination of sub-micrometre- and micrometre-scale boric acid powder additives exhibited better friction and wear performance than the canola oil mixed with sub-micrometre- or micrometre-scale boric acid additives alone.

Tribological Performance of Sub-Micron Scale Boric Acid Powder Additives for Extended Duration

2008 ◽  
Author(s):  
M. A. Kabir ◽  
C. F. Higgs ◽  
M. Lovell
Keyword(s):  
Boric Acid ◽  
Canola Oil ◽  
Friction And Wear ◽  
Vortex Generator ◽  
Tribological Performance ◽  
Lubricant Additives ◽  
Wear Performance ◽  
Frictional Performance ◽  
Extended Duration ◽  
Pin On Disk

In this investigation, the friction and wear performance of sub-micron scale boric acid powder lubricant additives were studied during extended duration pin-on-disk experiments. The sub-micron (600 nm) and micro (4 μm) powder additives were created from 250 micron sized crystals using an 1800D SPEX Mill/Mixer. Lubricant combinations were prepared by homogeneously mixing the additives with canola oil in a vortex generator. Three different boric acid additives were investigated by combining 5.0 wt. % of 4 μm boric acid particles, 5.0 wt % of 600 nm sized boric acid particles, and a 5.0 wt % mixture of the 4 μm (2.5 wt. %) and 600 nm (2.5 wt. %) boric acid particles. A fourth additive, 5.0 wt. % of 0.5 – 5μm MoS2 powder, was also purchased and mixed with the canola oil to form a basis for comparison. It was determined that the oil mixed with a combination of micro and sub-micron scale boric acid powder additives exhibited better frictional performance than the oil mixed with micro or sub-micron boric acid additives.

Some Tribological Properties of an Ionic Liquid

2005 ◽  
Author(s):  
Takashi Nogi
Keyword(s):  
Ionic Liquid ◽  
Coefficient Of Friction ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Wear Performance ◽  
Lubrication Regime ◽  
Pin On Disc ◽  
The Coefficient Of Friction

Some tribological properties of an ionic liquid were investigated by using a pin-on-disc friction and wear tester. Due to running-in, the coefficient of friction of the ionic liquid decreased with time to a very low value of 0.02 which suggests that the lubrication regime was hydrodynamic at the end of the tests. Anti-wear performance of the ionic liquid was substantially comparable to a paraffin-based oil.

On the friction and wear performance of boric acid lubricant combinations in extended duration operations

Wear ◽  
2006 ◽  
Vol 260 (11-12) ◽  
pp. 1295-1304 ◽  
Author(s):  
Pushkarraj Deshmukh ◽  
Michael Lovell ◽  
W. Gregory Sawyer ◽  
Anton Mobley
Keyword(s):  
Boric Acid ◽  
Friction And Wear ◽  
Wear Performance ◽  
Extended Duration

Tribological improvement of hardened and tempered AISI 4140 steel against Al2O3 by using bio-lubricant

MRS Advances ◽  
2017 ◽  
Vol 2 (62) ◽  
pp. 3873-3881 ◽  
Author(s):  
M.T. Hernández-Sierra ◽  
R. Ortega-Álvarez ◽  
M.G. Bravo-Sánchez ◽  
L.D. Aguilera-Camacho ◽  
J.S. García-Miranda ◽  
...  
Keyword(s):  
Castor Oil ◽  
Friction And Wear ◽  
Room Temperature ◽  
Wear Track ◽  
Mineral Oil ◽  
Wear Performance ◽  
Aisi 4140 Steel ◽  
Aisi 4140 ◽  
Pin On Disc ◽  
Sliding Distance

ABSTRACTAISI 4140 steel is a popular low alloy steel due to its wide applications as workpiece in the metal-mechanic industry; there are extensive research about surface modification to enhance its properties for specific applications. The focus of this study was to investigate the influence of the nature of lubricants, mineral and vegetable oils, on the tribological performance of the hardened and tempered AISI 4140 steel against alumina (Al2O3). For this purpose, friction tests were conducted in a pin on disc tribometer according to ASTM standard G 99-05, at room temperature of 25 °C and in air with about 30% relative humidity. Lubricants were selected to be commercial Holifa B22/2 oil as mineral oil and Castor Oil as bio-lubricant, with kinematic viscosity at 25 °C of 667 and 662 cSt respectively. The following conditions were settled for all the experiments: relative sliding speed of 0.05 ms-1, sliding distance of 1000 m and wear track radius of 2 mm. Friction behaviour was reported as the average kinetic friction coefficient (µK) while wear performance was evaluated as wear rate (K). In order to identify and determine wear mechanisms, worn surfaces were analyzed by optical microscopy and profilometry. It was found that, for these tribosystems, hardened and tempered AISI 4140 steel had the best friction and wear performance under lubrication with Castor Oil. The lowest µK achieved was 0.035, whereas the lowest K was 1.02x10-8 mm3/Nm. With this bio-lubricant, there were reductions in friction and wear up to 72% compared with those under mineral oil lubrication.

scholarly journals Tribological behavior of Ti-6Al-4V and Ti-6Al-7Nb Alloys for Total Hip Prosthesis

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Mamoun Fellah ◽  
Mohamed Labaïz ◽  
Omar Assala ◽  
Leila Dekhil ◽  
Ahlem Taleb ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Hip Prosthesis ◽  
Tribological Behavior ◽  
Wear Behavior ◽  
Femoral Stem ◽  
High Strength ◽  
Wear Performance ◽  
Grain Structures ◽  
Pin On Disc ◽  
Wear Tests

The aim of the study is to evaluate the friction and wear behavior of high-strength alloys Ti-6Al-7Nb used in femoral stem and compare it with a Ti-6Al-4V alloy cylindrical bar corresponding to ISO 5832-3 part 3/01-07-199 standard. The tribological behavior was investigated by wear tests, using ball-on-disc and pin-on-disc tribometers. These tests consisted of measuring the weight loss and the friction coefficient of samples. The oscillating friction and wear tests have been carried out in ambient with oscillating tribotester in accordance with standards ISO 7148, ASTM G99-95a, and ASTM G133-95 under different conditions of normal loads (3, 6, and 10 N) and sliding speeds (1, 15, and 25 mm·s−1). As counter pairs, a 100Cr6 steel ball with 10 mm in diameter was used. Results show that the two alloys had similar friction and wear performance, although their grain structures and compositions are different. Occurrence of large frictional occurred, is probably caused by formation and periodic, localized fracture of a transfer layer. Higher friction with larger fluctuation and higher wear rate was observed at the higher siding speed. The Ti-6Al-4V wear mechanism transforms from ploughing and peeling off wear at low sliding speed to plastic deformation and adhesive wear.

On the Friction and Wear Performance of Boric Acid Lubricant Combinations in Extended Duration Operations

2005 ◽  
Author(s):  
P. V. Deshmukh ◽  
M. Lovell ◽  
W. G. Sawyer
Keyword(s):  
Boric Acid ◽  
Friction And Wear ◽  
Environmentally Friendly ◽  
Disk Surface ◽  
Acid Mixture ◽  
Engineering Systems ◽  
Wear Performance ◽  
Wide Range ◽  
Extended Duration ◽  
Pin On Disk

Lubrication is critical for minimizing wear in mechanical systems that operate for extended time periods. Developing lubricants that can be used in engineering systems without replenishment — particularly those that are environmentally friendly — is very important for increasing the functional lifetime of mechanical components. In the present investigation, extended duration pin-on-disk experiments were carried out to determine the relative performance of a wide range of lubricant combinations in a commercial brake valve assembly. In the experiments, the lubricants were initially applied to the disk surface but were not replenished over a sliding distance of more than 6000 m. The experimental results revealed that the environmentally friendly lubricant boric acid was inefficient for reducing the wear in the surfaces tested. When combined with a commercial transmission fluid, however, the boric acid mixture proved highly effective in terms of both friction and wear performance. Based on the success of the combined lubricant experiments, the boric acid was then mixed with canola oil to form a completely natural lubricant combination. Based on further pin on disk experiments, this lubricant combination yielded the best wear performance of all the lubricants tested. The importance of these results, as related to the use of the natural lubricant combination in other engineering systems was subsequently ascertained and discussed.

The Influence of Plasma Surface Treatment of Carbon Fibers on the Flexural and Tribological Properties of UHMWPE Composite

2011 ◽  
Vol 233-235 ◽  
pp. 1740-1744
Author(s):  
Jian Li
Keyword(s):  
Surface Treatment ◽  
Carbon Fibers ◽  
Friction And Wear ◽  
Controlling Factors ◽  
Wear Performance ◽  
Plasma Surface ◽  
Plasma Surface Treatment ◽  
Pin On Disc ◽  
Ultra High Molecular Weight ◽  
Uhmwpe Composite

In this paper, the wear performance of a ultra-high molecular weight polyethylene composites filled with carbon fiber (CF/UHMWPE) were studied using a pin-on-disc method. The effects of surface treatment of CF and sliding load and on the friction and wear of the CF/UHMWPE composite are reported. It was observed that the sliding load is an important controlling factors; its effect is diminished when the CF is modified.

Tribological Performance of Aluminum Micro and Nano Composites

2011 ◽  
Author(s):  
Pradeep K. Rohatgi ◽  
Pradeep L. Menezes ◽  
Tatiana Mazzei ◽  
Michael R. Lovell
Keyword(s):  
Particle Size ◽  
Friction And Wear ◽  
Normal Load ◽  
Tribological Performance ◽  
Reinforcement Particle ◽  
Nano Composites ◽  
Ambient Conditions ◽  
Wear Performance ◽  
Dry Conditions ◽  
Pin On Disk

In the present investigation, the tribological performance of aluminum micro (100 to 200 μm particle size) and nano (47 nm particle size) composites was studied using a three pin-on-disk tribometer under dry conditions. As a basis for comparison, the tribological performance of aluminum alloys was also studied. The pins made of these materials were then slid against a steel disk under ambient conditions. Tests were conducted at a sliding velocity of 1.58 m/s for a normal load of 30 N. The worn surfaces of the pins were analyzed using a scanning electron microscope. Based on the experiments, it was observed that the nano-composites significantly outperformed all of the other materials with respect to friction levels. It was also discovered that the nano-composites exhibited the best wear performance among the composites investigated. The size of the reinforcement particle trapped at the interface and the hardness ratio of the mating materials were specifically found to play an important role in determining the friction and wear performance of the materials investigated.

Friction and wear performance of a copper-based bond emery wheel for rail grinding

2020 ◽  
Vol 62 (12) ◽  
pp. 1205-1214
Author(s):  
Lu-cheng Cai ◽  
Xiao-song Jiang ◽  
Yu-cheng Guo ◽  
Da-ming Sun ◽  
Xing-long Wang ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Wear Performance ◽  
Rail Grinding
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