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

Z. Pawlak, T. Kaldonski, R. Pai, E. Bayraktar, A. Oloyede

Research output: Contribution to journalArticle

92 Citations (Scopus)

Abstract

The present paper is based on experimental studies of self-lubricated porous sliding bearings with hexagonal boron nitride (h-BN) as an additive. The friction coefficients of powder matrix lubricated by (h-BN + oil) were measured at varying loads of 1.05-2.0 MPa and sliding speeds of 1.35 and 2.5 m/s. The results are discussed in the form of performance characteristics such as the coefficient of friction, bearing temperature, and load-carrying capacity. The micro-particles of the h-BN additive were between 1 and 2 μm in diameter. The effect of the PV (pressure-velocity) parameter on the transition time to seizure for porous bush composites impregnated by the lubricant has been studied. It was found that the addition of the micro-particles to the oil decreased the friction coefficient about twice as compared to self-lubricated bearings lubricated only by oil. The main effect of (h-BN micro-particles + oil) in comparison to Mobil DTE-BB lubricant appears to be that the impregnation of h-BN micro-particles persists for a long period of time and the micro-particles are gradually released, being supplied to the contact surfaces. For a manufacturing application, the porous bearings were assembled in a car clutch.

Original languageEnglish
Pages (from-to)1198-1202
Number of pages5
JournalWear
Volume267
Issue number5-8
DOIs
Publication statusPublished - 15-06-2009

Fingerprint

Bearings (structural)
clutches
Boron nitride
Clutches
boron nitrides
sliding
Railroad cars
Oils
oils
coefficient of friction
Friction
lubricants
Lubricants
seizures
load carrying capacity
Load limits
Impregnation
Powders
manufacturing
boron nitride

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

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abstract = "The present paper is based on experimental studies of self-lubricated porous sliding bearings with hexagonal boron nitride (h-BN) as an additive. The friction coefficients of powder matrix lubricated by (h-BN + oil) were measured at varying loads of 1.05-2.0 MPa and sliding speeds of 1.35 and 2.5 m/s. The results are discussed in the form of performance characteristics such as the coefficient of friction, bearing temperature, and load-carrying capacity. The micro-particles of the h-BN additive were between 1 and 2 μm in diameter. The effect of the PV (pressure-velocity) parameter on the transition time to seizure for porous bush composites impregnated by the lubricant has been studied. It was found that the addition of the micro-particles to the oil decreased the friction coefficient about twice as compared to self-lubricated bearings lubricated only by oil. The main effect of (h-BN micro-particles + oil) in comparison to Mobil DTE-BB lubricant appears to be that the impregnation of h-BN micro-particles persists for a long period of time and the micro-particles are gradually released, being supplied to the contact surfaces. For a manufacturing application, the porous bearings were assembled in a car clutch.",
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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, Z.; Kaldonski, T.; Pai, R.; Bayraktar, E.; Oloyede, A.

In: Wear, Vol. 267, No. 5-8, 15.06.2009, p. 1198-1202.

Research output: Contribution to journalArticle

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AU - Pai, R.

AU - Bayraktar, E.

AU - Oloyede, A.

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