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.

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.

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

Friction and Wear Performance of Surface Coatings in Brake Applications

2005 ◽  
Author(s):  
Pushkaraj Deshmukh ◽  
Michael Lovell ◽  
A. J. Mobley
Keyword(s):  
Electroless Nickel ◽  
Disk Surface ◽  
Surface Coatings ◽  
Wear Performance ◽  
Tungsten Disulphide ◽  
Valve Assembly ◽  
Transmission Fluid ◽  
Extended Duration ◽  
Pin On Disk ◽  
Sliding Distance

To improve the wear performance of contacting components, novel surface coatings have been developed over the past decade. In the present investigation, extended duration pin-on-disk experiments were carried out to determine the relative performance of tungsten disulphide, electroless nickel (MP6 and LP9) and hard chromium coatings for use in a commercial brake valve assembly. In the experiments, 100 μm thick coatings were applied to the disk surface and tests were conducted in both lubricated (transmission fluid with 5% weight boric acid additive) and unlubricated conditions. To establish the overall performance of the coatings, the friction coefficient and disk wear rate values were recorded over a sliding distance of 6280 m. Based on the experiments, it was observed that both the electroless nickel and the chromium coatings had moderate friction and insignificant wear over the sliding distance examined. Self lubricating tungsten disulphide, in contrast, exhibited very low friction, but completed degraded over time making it unsuitable for the application of interest.

Influence of the particle size on the physical, mechanical and tribological properties of composites for brake pads

2021 ◽  
pp. 36-40
Author(s):  
F.F. Yusubov
Keyword(s):  
Particle Size ◽  
Composite Materials ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Phenol Formaldehyde ◽  
Environmentally Friendly ◽  
Brake Pads ◽  
Mechanical And Tribological Properties ◽  
Pin On Disk ◽  
Properties Of Composites

Tribotechnical indicators of environmentally friendly frictional composite materials with phenol-formaldehyde matrix are studied. Friction tests were carried out on a MMW-1 vertical tribometer according to the pin-on-disk scheme. Keywords: brake pads, composites, friction and wear, plasticizers, degradation, porosity. [email protected]

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.

Friction and Wear Performance of Double Fraction Palm Olein Lubricant Using Pin-on-Disk Tribometer

2014 ◽  
Vol 554 ◽  
pp. 396-400 ◽  
Author(s):  
Samion Syahrullail ◽  
Noorawzi Nuraliza
Keyword(s):  
Aluminum Alloy ◽  
Wear Rate ◽  
Friction And Wear ◽  
Palm Olein ◽  
Normal Load ◽  
Pure Aluminum ◽  
Wear Performance ◽  
Sliding Speed ◽  
Pin On Disk ◽  
Worn Surface

In the present of analysis, the wear rate and friction coefficient of various material is investigated and it were compared below the result of sliding speed wherever the equipment pin on disk machine has been used. Experiments were carried out with 2 totally different pins fabricated from aluminum alloy (AA5083) and pure aluminum (A1100). Experiments were conducted at normal load in step with according to testing, 10 N with totally different sliding speed 1, 3, 5 m/s ,continuous flow lubricating substance, double fraction palm olein (DFPO). The result shows that the material from pure aluminum higher material compared to the aluminum alloy in sliding condition. The morphology of the worn surface was ascertained using high optical research. The magnitude of the friction constant and wear rate are totally different in material depending on the speeds and additionally material.

Friction and Wear of a Polymer-Matrix Reinforced With Nanocrystalline Alloy

2005 ◽  
Author(s):  
P. Iglesias ◽  
M. D. Bermu´dez ◽  
S. Chandrasekar ◽  
W. D. Compton
Keyword(s):  
Polymer Matrix ◽  
Friction And Wear ◽  
Polymer Matrix Composites ◽  
Nanocrystalline Alloy ◽  
Polymer Processing ◽  
Matrix Composites ◽  
Nanocrystalline Metal ◽  
Wear Performance ◽  
Reinforced Polymer ◽  
Pin On Disk

The tribological behavior of a polymer-matrix composite containing discontinuous nanocrystalline alloy reinforcements is studied using a model system composed of a bakelite matrix reinforced with unitary Al6061 nanostructures. Chip formation by machining is used to produce the unitary nanostructures with grain size in the range of 50–200 nm. The hardness and strength of the unitary nanostructures are seen to be substantially greater than those of micro-crystalline Al 6061. Polymer-matrix composites containing these nanocrystalline metal reinforcements in a bakelite matrix are prepared using standard polymer processing routes. The friction and wear characteristics of the composites are studied using block-on-cylinder and pin-on-disk configurations. The wear performance of the nanocrystalline, metal-reinforced polymer is compared with that of the unfilled polymer and also with that of the polymer reinforced with microcrystalline alloy reinforcements, and shown to be superior.

Effect of Humidity on the Friction and Wear Properties of Sn

1995 ◽  
Vol 117 (4) ◽  
pp. 737-741 ◽  
Author(s):  
Y. Imada ◽  
K. Nakajima
Keyword(s):  
Relative Humidity ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Disk Surface ◽  
Wear Loss ◽  
Wear Properties ◽  
Friction And Wear Behavior ◽  
Low Humidity ◽  
Friction And Wear Properties ◽  
Pin On Disk

Variation in friction and wear properties with relative humidity was obtained with an Sn pin sample on a Cu disk at a constant speed (0.4 m/s), load (6.4 N), and sliding distance (5 km), using a pin-on-disk apparatus. The influence of atmosphere on the tribological properties was investigated, including moisture ranging from 4% to 95 percent relative humidity (RH). It was found that the wear loss of the pin sample is very large at low humidity of around 5 percent RH, but it decreases and reaches saturation at about 50 percent RH. Factors characterizing the friction and wear at 50 percent RH were examined along with surface analysis of the disk. The results showed that the extensive transfer of Sn from pin to disk occurs during sliding and that the friction and wear behavior is determined by the friction and wear of an Sn sliding on Sn. An examination was carried out with an Sn pin sample on a stainless steel disk in comparison with an Sn-Cu couple. It was concluded that the friction and wear behavior is determined by the properties of the film transferred to the disk surface.

Relationships between the thermal stability, friction, and wear properties of reactively sputtered Si–aC:H thin films

2002 ◽  
Vol 17 (11) ◽  
pp. 2888-2896 ◽  
Author(s):  
Ryan D. Evans ◽  
Gary L. Doll ◽  
Jeffrey T. Glass
Keyword(s):  
Thin Films ◽  
Thermal Stability ◽  
Friction And Wear ◽  
Dry Sliding ◽  
Wear Properties ◽  
Wear Performance ◽  
Transfer Films ◽  
Friction And Wear Properties ◽  
Pin On Disk ◽  
Thermal Stability Of

The friction and wear performance were correlated with the thermal stability of reactively sputtered Si–aC:H thin films containing various Si and H concentrations. The average steady-state friction coefficients as measured by dry sliding pin-on-disk tests decreased with increasing Si and H content. Furthermore, the films with high Si and H formed thick transfer films as compared to the films with little or no Si and H content. Minimums in average ball abrasion rate and average film wear rate were observed at the Si/C = 0.10 film composition. The most intense and distinct “graphitic” Raman peaks were collected from the Si/C = 0.10 transfer film debris. In addition, the Si/C = 0.10 film also had the most distinguishable graphitic Raman signature after annealing in air at 500 °C compared to the other Si–aC:H films, suggesting a possible relationship between the nature of transfer films resulting from dry sliding in air and the bulk films that were annealed in air.

Friction and Wear Performance of Epoxy Resin Reinforced With Boron Nitride Nanoplatelets

2017 ◽  
Vol 140 (2) ◽  
Author(s):  
Mürsel Ekrem ◽  
Hayrettin Düzcükoğlu ◽  
Muhammet Ali Şenyurt ◽  
Ömer Sinan Şahin ◽  
Ahmet Avcı
Keyword(s):  
Mechanical Properties ◽  
Heat Conduction ◽  
Boron Nitride ◽  
Epoxy Resin ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Wear Performance ◽  
Friction And Wear Behavior ◽  
Pin On Disk ◽  
Disk Test

In this study, the effects of addition of boron nitride nanoplatelets (BNNPs) upon friction and wear behavior of epoxy resin have been investigated by using pin-on-disk test. It has been reported in the literature that certain amounts of BNNP addition can be useful for enhancement of mechanical properties. Therefore, it is very important to obtain the effect of such addition upon friction and wear performance of epoxy resin. BNNPs have been incorporated at 0.3–0.5–0.7–1 wt %. It is shown that BNNP addition results in decrease in friction coefficient and wear. It is also shown that the best results are obtained with 0.5% nanoplatelet addition. It is also observed that heat conduction of epoxy resin is enhanced by the nanoplatelet addition.

Sign in / Sign up

Export Citation Format

Share Document