Advanced Lubricants and Lubrication Techniques

Abstract

we must use much broader concepts in preparing for future lubrication requirements than at any time in the past. Temperature requirements provide the best example. About 1930, -65°F. was considered to be the low temperature goal, and the progression of the upper temperature goal from about 165°F. in that same year to about 200°F. in 1945 was gradual, and our research seemed adequate.But with the advent of jet propulsion systems and now of space systems the known state-of-the-art covers a much smaller fraction of our needs. The environments in which lubricants must operate have been greatly extended. Environmental temperatures now range from about -450°F. to temperatures in excess of 2500°F ., while pressures now extend from atmospheric down to beyond 10-10 mm. of Hg, Long duration capability or operation is needed-operational life of aerospace systems will be expected to exceed 30,000 hours. These new

Some esters of mono‐, di‐, and tricarboxystearic acid as lubricants: Preparation and evaluation

“…Certainly, future lubricating oils with oxidative stability and corrosion resistance for operation considerably above 500 F (possibly as high as t000 F) will be needed (2). Various classes of compounds, such as esters, ethers, fluorocarbons, silicones, and others, have been evaluated as possible lubricants and additives (3)(4)(5)(6)(7)(8).…”