Rheological behavior and tribological performance of a nanodiamond-dispersed lubricant

Chou, Chau-Chang; Lee, S.H.

doi:10.1016/j.jmatprotec.2007.11.169

Cited by 66 publications

(22 citation statements)

References 12 publications

(9 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This indicates that pure lube oil behaves like a Newtonian fluid at any shear rate [33]. For lube oil with additives, it is found that at low shear rate (5-30 s -1 ), the viscosity gradually decreases and the lubricant behaves like a non-Newtonian fluid [34]. However, at high shear rate, viscosity of the lubricants …”

Section: Analysis Of Rheological Studymentioning

confidence: 99%

Dodecyl methacrylate and vinyl acetate copolymers as viscosity modifier and pour point depressant for lubricating oil

et al. 2017

View full text Add to dashboard Cite

The article presents application of homo polymer of dodecyl methacrylate (DDMA) and its copolymers with vinyl acetate (VA) as multifunctional additives for lubricant formulation. Homo polymer of DDMA and five copolymers of DDMA with VA at different molar ratios were synthesized by free radical polymerization method using azobisisobutyronitrile (AIBN) as initiator. The characterization of the polymers was carried out through FTIR, NMR and GPC (gel permeable chromatography) analysis. The performance of all the polymers as viscosity index improver (VII) or viscosity modifier and pour point depressant (PPD) additive in two different base oils (mineral) were evaluated. The mechanism of action of the polymers as pour point depressant was studied by photo micrographic analysis. Rheological study of the formulated lubricant was also carried out and reported. The thermal stability of the polymers was determined by thermogravimetric analysis (TGA). It was found that thermal stability, VI and molecular weights of copolymers are higher than the homopolymer which showed better PPD property.

show abstract

Section: Analysis Of Rheological Studymentioning

confidence: 99%

Dodecyl methacrylate and vinyl acetate copolymers as viscosity modifier and pour point depressant for lubricating oil

et al. 2017

View full text Add to dashboard Cite

show abstract

“…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.…”

Section: Introductionmentioning

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%

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

Hwang¹,

Chang²,

Zhang³

et al. 2017

IJET

View full text Add to dashboard Cite

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 ...

show abstract

“…However, their poor frictional properties restrict the use of such class of ceramics in engineering applications [2]. Recently tribological studies conducted on nanodiamond particles mixed with conventional lubricants have proved effective in reduction of friction and wear in ceramics, under boundary lubricated conditions [4,5]. Composite of nano-Si 3 N 4 /nano-SiC is considered as a potential candidate material for various engineering applications for near future [6].…”

Section: Introductionmentioning

confidence: 99%

Friction and wear properties of nano-Si3N4/nano-SiC composite under nanolubricated conditions

Charoo

Wàňi

2016

J Adv Ceram

View full text Add to dashboard Cite

Friction and wear properties of nano-Si 3 N 4 /nano-SiC composite were studied under nanolubricated conditions. Mineral oil mixed with nanoparticles of diamond was used as lubricant. A friction coefficient of 0.043 and a wear coefficient of 4.2×107 were obtained for nano-Si 3 N 4 /nanoSiC composite under normal load of 600 N with mineral oil + 0.5 wt% nanodiamond, whereas a friction coefficient of 0.077 and a wear coefficient of 10.3×10 7 were obtained for nano-Si 3 N 4 /nanoSiC composite under normal load of 600 N with mineral oil. 3D surface profilometer was used to study the surface morphology of wear scars. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) studies were conducted to illustrate reduction in friction and wear.

show abstract

Rheological behavior and tribological performance of a nanodiamond-dispersed lubricant

Cited by 66 publications

References 12 publications

Dodecyl methacrylate and vinyl acetate copolymers as viscosity modifier and pour point depressant for lubricating oil

Dodecyl methacrylate and vinyl acetate copolymers as viscosity modifier and pour point depressant for lubricating oil

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

Friction and wear properties of nano-Si3N4/nano-SiC composite under nanolubricated conditions

Contact Info

Product

Resources

About