STATUS OF RESEARCH ON LUBRICANTS, FRICTION, AND WEAR.
Abstract
The progress made during the last decade in advancing the knowledge of the science and application of lubricants is reviewed and summarized. The adhesion theory of metallic friction has been extended to include high polymers, hard oxides, and brittle materials. The mode of deformation, real area of contact, and the role of junction growth between sliding solids has received more attention. Systematic studies of adhesive and abrasive wear have increased the understanding of the wear process. Considerable progress has been made in the development of solid-film lubricants. New synthetic liquid lubricants, having unusual physical properties, have been prepared, studied, and evaluated for special applications. Emphasis has been placed on synthesizing lubricants which are stable at increasingly higher temperatures. Although the mechanism by which additives enhance or impart special properties to liquids is now better understood, much more needs to be learned about the interaction among the many types of additives compounded in a modern lubricating oil. Frequently an additive improves one property at the expense of another. Progress has been made in developing new nonsoap thickeners for the preparation of greases from both petroleum and synthetic oils. New environmental conditions and more extreme operating requirements have created many new lubrication problems. Lubricants may be subjected to high vacuum, radiation, cryogenic or burning rocket fuel temperatures. Attention is called to areas in research and developement where solutions are needed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 19, 1967
- Accession Number
- AD0648412
Entities
People
- C. M. Murphy
- R. C. Bowers
Organizations
- United States Naval Research Laboratory