Effects of oil degradation on the friction and wear properties of silicon nitride/M-50 steel sliding couples

Robert Sabia, David Mitchell, James H. Adair

Research output: Contribution to journalConference article

Abstract

The effect of oil degradation on the wear behavior of the silicon nitride/M50 steel system has been studied in order to understand the influences of oil degradation on bearing performance. Degraded oil samples were generated by heating a conventional gas turbine lubricant (MIL-L-23699) to temperatures between 200-300 °C for various times. Sample characterization was performed using total acid number, antioxidant concentration, rheometry, surface tension, spectroscopy, and gel permeation chromatography. Coefficient of friction and rate of wear were measured on the oil samples using a pin-on-disk test apparatus under a Hertzian contact stress of 1.6 GPa at 25±1 °C. Results show significant physical and chemical changes which could not be attributed to any specific degradation product. Degradation is shown to increase the coefficient of friction, with no correlations to wear measurements.

Original languageEnglish (US)
Pages (from-to)361-368
Number of pages8
JournalCeramic Engineering and Science Proceedings
Volume18
Issue number3 A
StatePublished - Jan 1 1997
EventProceedings of the 1997 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures-B - Cocoa, FL, USA
Duration: Jan 12 1997Jan 16 1997

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Steel
Silicon nitride
Oils
Wear of materials
Friction
Degradation
Bearings (structural)
Gel permeation chromatography
Antioxidants
Gas turbines
Surface tension
Lubricants
Spectroscopy
Heating
Acids
silicon nitride
Temperature

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

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abstract = "The effect of oil degradation on the wear behavior of the silicon nitride/M50 steel system has been studied in order to understand the influences of oil degradation on bearing performance. Degraded oil samples were generated by heating a conventional gas turbine lubricant (MIL-L-23699) to temperatures between 200-300 °C for various times. Sample characterization was performed using total acid number, antioxidant concentration, rheometry, surface tension, spectroscopy, and gel permeation chromatography. Coefficient of friction and rate of wear were measured on the oil samples using a pin-on-disk test apparatus under a Hertzian contact stress of 1.6 GPa at 25±1 °C. Results show significant physical and chemical changes which could not be attributed to any specific degradation product. Degradation is shown to increase the coefficient of friction, with no correlations to wear measurements.",
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Effects of oil degradation on the friction and wear properties of silicon nitride/M-50 steel sliding couples. / Sabia, Robert; Mitchell, David; Adair, James H.

In: Ceramic Engineering and Science Proceedings, Vol. 18, No. 3 A, 01.01.1997, p. 361-368.

Research output: Contribution to journalConference article

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AU - Sabia, Robert

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