1. A study of mechanisms of graphite friction and wear
- Author
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P.J. Bryant, P.L. Gutshall, and L.H. Taylor
- Subjects
Materials science ,Muscovite ,Mineralogy ,Surfaces and Interfaces ,engineering.material ,Condensed Matter Physics ,Talc ,Surfaces, Coatings and Films ,Mechanics of Materials ,visual_art ,Molybdenite ,Margarite ,Materials Chemistry ,medicine ,Lubrication ,visual_art.visual_art_medium ,engineering ,Lamellar structure ,Graphite ,Composite material ,medicine.drug ,Pyrophyllite - Abstract
A basic research program to determine fundamental phenomena involved in lubrication by graphite and other lamellar solids is described. Lamellar cleavage experiments in known environments of air, ultra-high vacuum, water vapor, and oxygen are reported. A theoretical calculation of the interlamellar binding energy of the ideal graphite lattice is described. A stress-etch process is reported for graphite, in dry oxygen, water vapor, and air environments, which significantly lowers the cleavage energy and provides a basis for understanding lubrication phenomena. A general hypothesis of lamellar solid lubrication is thereby proposed on the basis of interlamellar binding forces. A correlation of this general hypothesis is made with experimental results for the lamellar materials: graphite, molybdenite, pyrophyllite, muscovite, margarite, talc, and phlogopite.
- Published
- 1964