In situ measurements of lubricant temperature and pressure at a sliding contact

C. U Amanda Cheong, Peter C Stair

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The in situ temperature and pressure of silicone (polydimethylsiloxane) grease at a ball-on-flat sliding contact was successfully measured by UV Raman spectroscopy. The ratio of Stokes and anti-Stokes Raman peaks from the 490 cm-1 Si-O-Si bending mode were used to calculate the grease temperature at 10 and 20 cm/s sliding speeds. The peak shifts detected during sliding were used to calculate the lubricant pressure. The results show that the silicone temperature at the contact area increased with the sliding speed. Under a stationary contact, the silicone temperature was measured to be 22°C. At 10 and 20 cm/s sliding speeds, the silicone temperatures were measured to be 45 and 62°C, respectively. The pressure, on the other hand, did not depend on the sliding speed and remained at 0.6 GPa. These results were found to be consistent with calculations based on Hertzian contact theory.

Original languageEnglish
Pages (from-to)11314-11319
Number of pages6
JournalJournal of Physical Chemistry C
Volume111
Issue number30
DOIs
Publication statusPublished - Aug 2 2007

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sliding contact
lubricants
in situ measurement
Lubricants
sliding
silicones
Silicones
greases
Lubricating greases
Temperature
temperature
Polydimethylsiloxane
Ultraviolet spectroscopy
Raman spectroscopy
balls
shift

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

In situ measurements of lubricant temperature and pressure at a sliding contact. / Cheong, C. U Amanda; Stair, Peter C.

In: Journal of Physical Chemistry C, Vol. 111, No. 30, 02.08.2007, p. 11314-11319.

Research output: Contribution to journalArticle

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