Basic Lubricant Studies.
Abstract
Materials broadly classified as solid lubricants, liquid lubricants, and lubricant additives were studied under pressures up to 70 kilobars in a diamond high pressure cell. The compositions that were examined included binary chalcogenides of molybdenum, tungsten, lead, niobium, antimony, and arsenic as well as lead oxides, zinc oxide, iodine, sulfur, and sodium sulfate. Also studied were complex chalcogenides such as thioantimonates, thiomolybdates, and thiotungstates of molybdenum, tungsten, copper, iron, silver, antimony, arsenic, cadmium, and cerium. The liquid lubricants and additives for this study were selected from straight oils, silicone oils, esters, ethers, fatty acids, phosphates, phosphites, and organometallic thio compounds. In addition to changes in density, one or more reversible color changes, changes in light transmittance, changes in birefringence, or development of phase boundaries were observed by microscopic studies for thirteen of the solids and three of the liquids. One liquid lubricant, a sperm oil, was found to solidify at 15 kilobars. Initial results of infrared studies on the effects of high pressures on As2S3 have been obtained. An X-ray diffraction unit was adapted for use with the diamond high pressure cell. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1971
- Accession Number
- AD0727577
Entities
People
- William H. Chappell