Accession Number:

ADA008530

Title:

Aircraft Propulsion Lubricating Film Additives: Boundary Lubricant Surface Films.

Descriptive Note:

Phase rept. 1 Dec 73-30 Nov 74,

Corporate Author:

BATTELLE COLUMBUS LABS OHIO

Personal Author(s):

• Allen,C. M.
• Drauglis,E.
• Glaeser,W. A.
• Alexander,C. A.
• Jakobsen,R. J.

Report Date:

1975-01-01

Pagination or Media Count:

51.0

Abstract:

The purpose of this investigation is the development of an adequate understanding of boundary lubricant films so as to permit the systematic design and formulation of new boundary lubricant-fluid systems. If a given fatty acid is added to a group of hydrocarbon solvents of various chain lengths, the boundary lubricating character is different, thereby suggesting strongly that the solvent is entering into the formation of a boundary lubricant film. Because much is known about straight-chain hydrocarbon solvents and fatty acid additives, these were selected for determining the validity of the proposed model. As the surface films of interest are considered to be liquid crystal-like, the use of polarized radiation was considered practicable. Actually, the technique selected is frustrated-multiple-internal-reflection FMIR spectroscopy. The results of the experimental research on molecular ordering of surface films and their thermal and mechanical properties are presented in the following sections. A resume of the theoretical research and analytical methodology is also presented.

Descriptors:

• *FILMS
• *BOUNDARY LAYER
• *LUBRICANTS
• SHEAR PROPERTIES
• THERMAL PROPERTIES
• MECHANICAL PROPERTIES
• MOLECULES
• EXPERIMENTAL DESIGN
• DAMPING
• ORIENTATION(DIRECTION)
• ALKANES
• SURFACES
• CREEP
• FRICTION
• LUBRICATION
• STEARIC ACID

Subject Categories:

• Physical Chemistry
• Lubricants and Hydraulic Fluids

Distribution Statement:

APPROVED FOR PUBLIC RELEASE