The anti-scuffing performance of diamond nano-particles as an oil additive

Chu, Hung‐Kuo; Hsu, Wen Chen; Lin, Jen Fin

doi:10.1016/j.wear.2009.12.023

Cited by 66 publications

(42 citation statements)

References 11 publications

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“…The maximum contact pressure range of the contact point between the current test specimen based on elastic Hertz contact theory is 2700 MPa to 3400 MPa, which is higher than the contact pressure of 950 MPa in earlier studies [6,9]. It can be expected that the relatively low hardness of disc caused two-body abrasion on its surfaces under the higher contact pressure in the current experiments.…”

Section: Resultsmentioning

confidence: 51%

“…In general, wear loss depends on the contact pressure, abrasive particle used, and the relative hardness of the two rubbing materials. For example, an anti-wear performance study of a lubricant with ND particles on low carbon steel and bearing steel [6] reported that non-heat treated low-carbon steel with a hardness of 200 H v exhibited increased wear loss, whereas, the bearing steel exhibited decreased wear loss. The researchers argued the ND particles were imbedded into the surfaces and that there was two-body abrasion, resulting in significant wear loss in the low-carbon steel.…”

Section: Resultsmentioning

confidence: 99%

“…A large number of papers have reported that the addition of ND particles to a lubricant can effectively reduce wear and friction by acting as ball bearings between two mutually sliding surfaces [1,[5][6][7][8]. The friction-reduction and anti-wear behaviors are dependent on the characteristics of the concentration and test alloys.…”

Section: Introductionmentioning

confidence: 99%

“…They reported a ball bearing effect with these particles between two rubbing surfaces, resulting in excellent load-carrying capacities and, anti-wear and friction-reduction properties. Chu et al studied the tribological characteristics and scuffing resistance of ND lubricants on SKD11 die steel under various sliding speeds and loads [6]. They proved that the addition of ND particles to a lubricant is effective for reducing scuffing and friction.…”

Section: Introductionmentioning

confidence: 99%

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Tribology behavior of a lubricant with nano-diamond particles on steel

Hwang¹,

Chang²,

Zhang³

et al. 2017

IJET

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Abstract-A pin-to-disc wear testing machine was used in order to investigate the wear characteristics of a lubricant with nano-diamond (ND) particles. The applied loads were 30 N, 40 N, 50 N and 60 N and the sliding speed was 0.3 m/s. The wear tests were run with a sliding distance of 24 km. The friction coefficients and wear loss of S45C specimens were tested in a commercial oil (5W-40) with different ND concentrations ranging from 0 to 0.02 wt.%. The addition of ND particles to commercial oil was found to reduce the coefficient of friction for S45C steel. ND particles as a solid additive in oil lubricants were found to improve the tribological behavior of S45C carbon steel. For the S45C steel, the best concentration was found to be 0.0075 wt.% for both the anti-wear and friction reduction performance capabilities.Keywords: Nano-diamond particles, Tribology behavior, Wear loss, Friction coefficient I. INTRODUCTIONGenerally, the tribological regimes for sliding lubricated surfaces are broadly categorized into the solid/boundary lubrication, mixed lubrication, and fluid film lubrication types. Oil additives are extensively used for boundary and fluid film lubrication applications. These additives form an adsorption layer on metal surfaces to prevent the direct contact of rubbing pairs. Over the last few years, interest in applications of several types of nanoparticles as lubricant additives has steadily grown due to the demonstrated reduction in friction and wear when using nanoparticle-containing lubricants [1][2][3][4]. Among these additives, nano-diamond (ND) particles have recently been shown to be promising candidates for reducing wear and friction both economically and effectively.There have been many investigations of the tribological properties of lubricants with ND particles added. A large number of papers have reported that the addition of ND particles to a lubricant can effectively reduce wear and friction by acting as ball bearings between two mutually sliding surfaces [1,[5][6][7][8]. The friction-reduction and anti-wear behaviors are dependent on the characteristics of the concentration and test alloys. For example, Wu et al. investigated the friction and wear characteristics of lubricants with CuO, TiO 2 and diamond nanoparticles [5]. They reported a ball bearing effect with these particles between two rubbing surfaces, resulting in excellent load-carrying capacities and, anti-wear and friction-reduction properties. Chu et al. studied the tribological characteristics and scuffing resistance of ND lubricants on SKD11 die steel under various sliding speeds and loads [6]. They proved that the addition of ND particles to a lubricant is effective for reducing scuffing and friction. Chou and Lee [7] studied the rheological behavior and tribological performance of lubricants with ND particles. They found that ND particles made the wear tracks of aluminum alloy smoother by polishing the contact asperities and thus increasing the friction and wear. However, for carbon steel pairs, this additive reduced the ...

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Section: Resultsmentioning

confidence: 51%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Tribology behavior of a lubricant with nano-diamond particles on steel

Hwang¹,

Chang²,

Zhang³

et al. 2017

IJET

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show abstract

“…Some new areas and concepts have been explored, e.g. superlubricity [1-5], nanoparticles or onion-like carbon nanoparticles in lubricant [6][7][8][9], nanolubrication under external electric voltage [10][11][12][13][14][15], biolubrication [16][17][18][19], lubrication with textured surfaces [20][21][22], and aqueous lubrication [23][24][25]. Aqueous solutions are drawing attention because of their ecological advantages, fire-resistance, high thermal conductivity, nontoxicity, accessibility, biodegradability, environmental friendliness, and good solvency.…”

mentioning

confidence: 99%

Progress in experimental study of aqueous lubrication

Zhang

Liu

2012

Chin. Sci. Bull.

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Aqueous lubrication is commonly regarded as friendly to the environment. We review current knowledge of the behaviors and mechanisms of aqueous lubrication. Major methods for investigating aqueous lubrication are addressed. We describe studies on both friction and film formation performance of various water-based lubricants. Additionally, we discuss possible underlying mechanisms of aqueous lubrication. Attention is also drawn to continuing topics of investigation and some unsolved problems. [20][21][22], and aqueous lubrication [23][24][25]. Aqueous solutions are drawing attention because of their ecological advantages, fire-resistance, high thermal conductivity, nontoxicity, accessibility, biodegradability, environmental friendliness, and good solvency. However, water-based solutions have several disadvantages as lubricants, such as corrosiveness, vaporization and non-viscosity [26,27]. In the past several decades, aqueous fluids have been extensively used as lubricants in metal working processes, food processing, biological systems etc. Since petroleum will be exhausted within 50 years, aqueous fluids will have wide application in many industrial fields. Thus, research on aqueous fluids has become an important branch of tribology. Use of water-based lubrication in engineering can be traced back to about 2400 BC, when people used water as a lubricant in transporting statues in Egypt [28]. Meanwhile, water-based liquids have always been excellent lubricants in mammalian joints such as knees or hips, with friction coefficients μ< 0.002 [29,30]. Till now this ultra-low friction has not been well emulated in human-made aqueous systems. In contrast to oils and organic solvents, water has many unique properties due to the polarity of its molecules, which makes aqueous lubrication much more complicated than traditional lubrication with oils.Many studies have revealed both the characteristics and mechanisms of aqueous lubricants, with a wide variety of dimensions, conditions and application areas. In spite of the great efforts of both experimentalists and theorists, the study of aqueous lubrication still faces big challenges. As mentioned above, human-made systems seldom emulate natural lubrication well enough for practical use. Major efforts have been made to reduce the friction force of aqueous solutions between two solid surfaces and enhance the film formation ability at the same time. Nanotechnology has made much progress in revealing the underlying mechanisms and behaviors of materials at the nanometer-scale, especially the behaviors of atoms and molecules [31][32][33]. However, the mechanisms of aqueous lubrication are still not well known because of the diversity and complexity of aqueous solutions. This paper presents a general review of research on aqueous lubrication.

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Laser Irradiation‐Induced SiC@Graphene Sub‐Microspheres: A Bioinspired Core–Shell Structure for Enhanced Tribology Properties

Luo

Chen

Wang

et al. 2017

Adv Materials Inter

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Friction generally happening among all moving material interfaces wastes nearly one‐third of total mechanical energy in the world each year, although different kinds of lubricants are adopted. Particle additives, like diamond, inorganic fullerene, and graphene, can enter tribological contacts to reduce friction and protect surfaces from wear. However, the growth of such additives with spherical morphology and high dispersibility in oil without molecular ligands is a major problem. Inspired by the impressive dispersion stability of Noctiluca scientillans in ocean, one novel core–shell composite constructed with superhard SiC sub‐microsphere as core and exclusive floating flat‐blade graphene sheet as shell (SiC@G) is designed. These core–shell SiC@G sub‐micropheres are synthesized for the first time by in situ pulsed laser irradiating commercial SiC powders in liquid at ambient conditions. Both laser‐stimulated surface tension energy release and photothermal decomposition involved in the laser irradiation process assure the reshaping of SiC particles and the formation of graphene sheets derived from SiC surface. Due to the synergistic effect of SiC spheres changing effectively sliding friction into rolling friction and flexible self‐lubricating graphene forming a tribofilm easily, such composites as additives remain well dispersed in lubricating oil and exhibit enhanced antiwear and friction‐reduction performance.

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The anti-scuffing performance of diamond nano-particles as an oil additive

Cited by 66 publications

References 11 publications

Tribology behavior of a lubricant with nano-diamond particles on steel

Tribology behavior of a lubricant with nano-diamond particles on steel

Progress in experimental study of aqueous lubrication

Laser Irradiation‐Induced SiC@Graphene Sub‐Microspheres: A Bioinspired Core–Shell Structure for Enhanced Tribology Properties

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