A comparative study on the tribological behaviour of hexagonal boron nitride (h-BN) as lubricating micro-particles—An additive in porous sliding bearings for a car clutch

Pawlak, Zenon; Kałdoński, T.; Pai, Raghuvir; Bayraktar, E.; Oloyede, Adekunle

doi:10.1016/j.wear.2008.11.020

Cited by 135 publications

(79 citation statements)

References 12 publications

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“…The weak van der Waals force between the discs is responsible for promoting shear resulting in low frictional force. Similar results have been observed by other sheet-like particles, such as MoS 2 [21], H-BN [22], and WS 2 [23]. The present research further proves the effectiveness of nanosheets with weak interfacial bonding.…”

Section: Friction and Wearsupporting

confidence: 89%

Formation of Anti-Wear Tribofilms via α-ZrP Nanoplatelet as Lubricant Additives

et al. 2016

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Abstract:Effective tribofilms are desirable to protect mechanical systems. In the present research, we investigated the formation of a tribofilm through the use of α-ZrP (Zr(HPO 4 ) 2¨H2 O) as an additive. Experiments were conducted on a base oil where 0.2 wt% of the additive was used. Experimental results showed a 50% reduction in friction and a 30% reduction in wear when compared to the base oil containing 0.8 wt% ZDDP. Spectroscopic characterization indicated that the tribofilm consists of iron oxide, zirconium oxide, and zirconium phosphates. The worn surface was seen to be smooth which renders it desirable for bearing systems.

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Section: Friction and Wearsupporting

confidence: 89%

Formation of Anti-Wear Tribofilms via α-ZrP Nanoplatelet as Lubricant Additives

et al. 2016

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“…At 20 N load, the wear volume is 69.3% less in comparison to the h-BN lubricant, whereas at 100 N the same is reduced by 57.16%. The improvement in wear properties is due to the combined effect of the diamond nanoparticles and h-BN layers formed therein (Shenderova et al 2014;Pawlak et al 2009). In Fig.…”

Section: Tribological Studiesmentioning

confidence: 99%

Tribological investigation of diamond nanoparticles for steel/steel contacts in boundary lubrication regime

Raina

Anand

2017

Appl Nanosci

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This paper presents an investigation of nanodiamond additives (ND) in combination with copper oxide (CuO) and hexagonal boron nitride (h-BN) particles mixed in PAO (poly-alpha-olefin) oil. The experimentation was performed for a ball on disc configuration using steel/steel contacts in the boundary lubrication regime. The loads were varied from 20 to 100 N and sliding velocity was kept constant at 0.58 m/s. The wear behavior was evaluated using SEM images of the worn-out disc surfaces. EDS analysis of the samples was performed to find out the chemical content of the worn surfaces. Results obtained therein demonstrated that oil containing CuO/ND and h-BN/ND exhibited better frictional and wear characteristics. For CuO/ND containing lubricant, the maximum decrease in friction coefficient is 15.45% in comparison to the CuO oil, whereas for h-BN/ND containing additives the overall decrease is 25.45%. It was observed that the combined effect of CuO/ND and h-BN/ND due to their intrinsic characteristics led to the overall improvement in lubrication properties of the base oil.

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“…Boron nitride is a well-known wide bandgap semiconductor with very interesting physicochemical properties and potential applications in fields such as optoelectronics [1][2][3][4], high-temperature electronics [5][6][7][8] and tribomechanics [9,10]. Generally, boron nitride has the BN 1:1 stoichiometry and can exist in several crystal structures, the most common being hexagonal, wurtzite and cubic.…”

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confidence: 99%