Aircraft Propulsion Lubricating Film Additives:Boundary Lubricant Surface Films.

摘要

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.