Tribological assessment of coated piston ring-cylinder liner contacts under bio-oil lubricated conditions

Peng, Yubin; Xu, Yufu; Geng, Jian; Dearn, Karl D.; Hu, Xianguo

doi:10.1016/j.triboint.2016.12.004

Cited by 40 publications

(19 citation statements)

References 44 publications

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“…EN coatings are deposited on specimens of dimension 6 mm diameter and 30 mm length for the tribological tests. Whereas for characterization purposes, coatings are deposited on blocks of dimension 15 Â 15Â2 mm 3 . The specimens are initially cleaned thoroughly using soap water and running water.…”

Section: Coating Depositionmentioning

confidence: 99%

“…Electroless nickel (EN) coatings show excellent corrosion resistance, anti-wear, and anti-friction properties. [2][3][4][5] The properties of EN coatings can be suitably tailored to cater into the industrial needs by varying the bath components, 6 heat treatment, 7 alloying with elements such as W, Mo, Cu, etc., [8][9][10] and co-deposition of composite micro/nano particles such as Al 2 O 3 , TiO 2 , SiC, PTFE, etc. 11 With the challenging industrial demands and aggressive environment, the development of high temperature self-lubricating coatings has gained immense importance.…”

Section: Introductionmentioning

confidence: 99%

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Tribological behavior of electroless Ni–B–W coating at room and elevated temperatures

Mukhopadhyay

Barman

Sahoo

2018

Proceedings of the Institution of Mechanical Engineers, Part J:

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Sodium borohydride reduced electroless NiB coatings possess high hardness, wear resistance, and low coefficient of friction. They are found to be suitable candidates for wear reduction of mechanical components. In a quest to achieve enhanced tribological behavior and high thermal stability, the present work reports the inclusion of W to NiB coatings. Electroless method is employed for NiB -W coating deposition on AISI 1040 steel specimens. Post deposition, the coatings are heat treated at 350 C, 400 C, and 450 C. Deposit characterization is carried out using energy-dispersive X-ray analysis, X-ray diffraction, and scanning electron microscopy. Inclusion of W leads to an increase in microhardness and thermal stability of NiB coatings. The tribological behavior of as-deposited and heat-treated NiB -W coatings are investigated at room and elevated temperatures (100 C, 300 C, and 500 C). Heat-treated coatings show lower wear rate at room temperature compared to as-deposited ones but the coefficient of friction increases. Tribological test results at elevated temperatures suggest an improvement in the wear resistance and coefficient of friction at 300 C and 500 C in comparison with 100 C. Phase transformation study post wear test indicate microstructural changes in the coating due to the in situ heat treatment at high temperature. The tribological behavior of the coatings at 100 C and 300 C is mainly governed by the loose wear debris and formation of debris patches, respectively. Whereas at 500 C, formation of protective tribo-oxide patches is also observed.

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Section: Coating Depositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tribological behavior of electroless Ni–B–W coating at room and elevated temperatures

Mukhopadhyay

Barman

Sahoo

2018

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Persson [12] said that the mix of particles with water is highly viscous and then lubricates more the tire/road interface. The lubricating action of particles mixed with lubricants has been observed in other tribosystems like piston ring-cylinder liner pairs in internal combustion engines [13][14] [15]. These authors have shown that adding additives like molybdenum disulfide [13] [14] or graphite [15] in oils helps to reduce friction and wear.…”

Section: Introductionmentioning

confidence: 99%

“…The lubricating action of particles mixed with lubricants has been observed in other tribosystems like piston ring-cylinder liner pairs in internal combustion engines [13][14] [15]. These authors have shown that adding additives like molybdenum disulfide [13] [14] or graphite [15] in oils helps to reduce friction and wear. Xu and coauthors in [15] attributed this performance to the higher viscosity of oil with additives (an esterified bio-oil has been used) compared with pure oil.…”

Section: Introductionmentioning

confidence: 99%

Effect of dry deposited particles on the tire/road friction

Hichri¹,

Cerezo²,

Do³

2017

Wear

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Road accidents increase during the first rain after a long dry period. It is widely accepted that the tire traction loss is due to fine particles accumulated on the road surface. Yet, the involved mechanisms at the tire/road interface are not clearly understood. This paper deals with the particle-induced lubrication on dry road. Tests are performed in laboratory. Sediments are extracted from a catchment area which collects runoff water. The process of extracting particles from sediments in laboratory by drying and sieving is described. Particles are separated into fractions characterized by their chemical composition and size distribution. Protocol to simulate the process of particles' build-up on the road surface is described. The effect of the particle's size and concentration is studied. Surfaces representative of real road surface textures are tested. Friction tests are conducted using the Skid Resistance Tester, which is widely used to assess friction characteristics of road surfaces. Samples are weighed before and after each friction run. On a surface initially covered by a compacted particle layer, successive friction runs are performed, without resupplying particles, to follow the evolution of the friction coefficient with the particle depletion. Friction drops significantly when a surface is covered by particles. Successive runs induce an increase of the friction coefficient until reaching a stable value which is still lower than that of a clean surface. Particles are considered as third bodies introduced artificially in the interface between the friction slider and the test sample. Analysis of particles' flows (particles trapped and ejected), through particles' mass extracted from weighing, helps to explain the friction variation. Assuming that friction is governed by the surface fraction (X) covered by particles, a model was developed. The calculated friction coefficient is a weighted sum of friction coefficients when the surface is respectively clean (X = 0) and fully covered by particles (X = 1). It was found that the surface fraction can be expressed as a function of the ratio of available particles' mass to initial particles' mass. Comparisons between model and experiment are satisfactory. Discussions are made in terms of interactions between surface textures and particles' size and concentration.

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“…In the current research, the main consideration for the application of texture is the influence of related parameters, and different texture parameters are designed for different application scenarios. For example, in Xu et al's [32][33][34][35][36] research, the application of different texture parameters in cylinders was studied, and friction and wear tests were carried out on the textured elements using a friction and wear machine. e research results provided a good understanding for the lubrication mechanisms of different textured surfaces.…”

Section: Introductionmentioning

confidence: 99%

Influence of Different Surface Texture Parameters on the Contact Performance of Piston Ring‐Sleeve Friction Pair of Hydraulic Cylinders

Wang

Liu

Chen

et al. 2021

Advances in Materials Science and Engineering

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The surface texture, a major way to decrease friction and wear of the cylinder-piston ring friction pair, was conducted on cylinder-piston ring friction pair specimen using the orthogonal experimental design method to investigate the effect of different texture parameters (size, depth, shape, and surface density) of the friction and wear characteristics. Through simulation analysis, the texture parameters that affect the friction and wear characteristics are obtained. Using the evaluation method of friction coefficient and mass wear rate, the influence sequence and optimal values of texture parameters that affect friction and wear characteristics are obtained through range analysis. The results show that, after surface texture treatment under mixed lubrication conditions, the friction characteristics of the friction pair have changed and the friction coefficient and friction and wear rate have been significantly reduced. The results show that the triangular texture has a good antifriction effect, the texture depth is deepened, and the surface density and the size increases have a positive effect on the improvement of friction and wear. An ultra-depth microscope was used to observe the wear morphology of the friction and wear tests. The results show that the weakening of the third body wear by the texturing treatment and the maintenance of oil lubrication are the main reasons for reducing friction and wear.

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Tribological assessment of coated piston ring-cylinder liner contacts under bio-oil lubricated conditions

Cited by 40 publications

References 44 publications

Tribological behavior of electroless Ni–B–W coating at room and elevated temperatures

Tribological behavior of electroless Ni–B–W coating at room and elevated temperatures

Effect of dry deposited particles on the tire/road friction

Influence of Different Surface Texture Parameters on the Contact Performance of Piston Ring‐Sleeve Friction Pair of Hydraulic Cylinders

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