Accession Number:

ADA029267

Title:

Aircraft Propulsion Lubricating Film Additives: Boundary Lubricant Surface Films.

Descriptive Note:

Final rept. 1 Dec 74-30 Apr 76,

Corporate Author:

BATTELLE COLUMBUS LABS OHIO

Report Date:

1976-05-01

Pagination or Media Count:

119.0

Abstract:

The report summarizes the research prior to that described in Volume III and presents the results of the most recent research in some detail. This covers a broad spectrum of data on mechanical properties, using a sensitive stick-slip friction apparatus the detection of molecular order and orientation in quiescently formed solution films using frustrated-multiple-internal-reflection infrared spectroscopy FMIR, and in the determination of the thermodynamic properties of selected film species using ellipsometric techniques. Experiments were performed on rubbed stearic acid films on three substrates--iron, chromium and copper. Using carefully controlled surface contact conditions, very pure iron and chromium substrates were used to form surface films from straight-chain hydrocarbon solutions and ester-commercial additive systems. The mechanical properties - friction, shear stress and damping- were studied utilizing films formed in situ. This is also true for the measurement of thermodynamic properties though no dynamic rubbing contact was involved in the ellipsometric determinations.

Subject Categories:

  • Aircraft
  • Lubricants and Hydraulic Fluids
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE