Lubricity of Inorganic Solid Substances at High Temperatures,
Abstract
Out of more than 20 kinds of powdered inorganic solids used in the experiment, including metallic oxides, sulfides, halides, inorganic and organic salts, silicates, graphite, and carbon black, the authors found that the friction coefficient of graphite is comparatively low and stable. Microphotographs of the friction path prove that the lubricating substance reduced wear resulting from friction in the dry state but that frictional wear was still significant. The authors assert that the lubricating efficiency of the powder is related to its adhesion and low shearing strength. Dehydrated inorganic compounds, such as cobalt chloride containing chemically combined water, might increase the lubricating efficiency of graphite. If an equal quantity of molybdenum disulfide is added to graphite, the mixture is more adhesive to the metal surface and thus reduces frictional wear. It is concluded that a poly-component mixture of inorganic solids yields low-friction and high anti-wear lubricating properties at high temperatures. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 13, 1968
- Accession Number
- AD0726344
Entities
People
- Chin-lin Ouyang
- Shao-li Chen
Organizations
- National Air and Space Intelligence Center