Analysis of Lubricant Films in Bearings Under Incipient Failure Conditions.

Abstract

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)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1981
Accession Number
ADA110642

Entities

People

  • James L. Lauer

Organizations

  • Rensselaer Polytechnic Institute

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Sensors

DTIC Thesaurus Topics

  • Chemical Synthesis
  • Chemistry
  • Cyclic Hydrocarbons
  • Detectors
  • Elastic Properties
  • Emission Spectra
  • Engineering
  • Failure Mode And Effect Analysis
  • Friction
  • Lubricants
  • Measurement
  • Mechanics
  • Optics
  • Organic Chemistry
  • Refractive Index
  • Spectra
  • Spectroscopy

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Organic Chemistry
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).