Analysis of Lubricant Films in Bearings Under Incipient Failure Conditions.
Final rept. 1 Jan 78-30 Jun 81,
RENSSELAER POLYTECHNIC INST TROY N Y DEPT OF MECHANICAL ENGINEERING
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Infrared emission spectra have been obtained from operating elastohydrodynamic bearings through a diamond window. Failure modes were observed in two instances, with a cycloparaffinic and an aromatic lubricant, both in the presence of an organic chloride. The mechanism of carbonization and polymerization appeared to be ionic in each case. All the infrared spectra were polarized to a degree depending on the shear rate and more so in presence of an organic chloride. In at least one case the chloride came out of solution and two phase flow occurred. The instrumentation developed is so discriminating and sensitive that spectra from layers as thin as one molecular thickness would seem to be obtainable. It can therefore be useful for surface analysis in different situations. Author
- Lubricants and Hydraulic Fluids
- Atomic and Molecular Physics and Spectroscopy