FRICTION AND WEAR BEHAVIOR OF SOLID FILMS.
Rept. for 1 Dec 63-31 Dec 64,
MIDWEST RESEARCH INST KANSAS CITY MO
Pagination or Media Count:
The research phases consist of 1 a study of cleavage energies and stress-relaxation effects for graphite in air, vacuum, and pure environments of relevance to lubrication phenomena 2 measurements of the shear strength of graphite and the physical mode of failure under shearing motion and 3 a detailed study of friction and wear process, including wear particle size measurements, in the pure relevant environments for graphite lubrication. The first phase has shown, from both theory and experiment, an unusually high binding energy for graphite. This high energy has been identified as the real reason for graphites failure to exhibit intrinsic lubrication. The second phase has confirmed the conclusions drawn from the first study by showing a high shear strength for graphite. The third phase promises to give correlations between the basic properties of graphite, such as binding energy, and effects which are observed during actual frictional tests. Thus, all of the results from cleavage measurements, stress relaxation in various environments, and shear strength measurements will be correlated with the friction and wear studies to give a better understanding of lamellar solid lubrication. Author