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Effective Lubrication Range for Steel Surfaces Boundary Lubricated at High Sliding Velocities by Various Classes of Synthetic Fluids

Robert L. JohnsonMax A. SwikertEdmond E. Bisson

出版	National Advisory Committee for Aeronautics, 1952
URL	http://books.google.com.hk/books?id=HU69tgAACAAJ&hl=&source=gbs_api

註釋

Synthetic lubricants are necessary in order to satisfy the physical-property requirements for future lubricants of aircraft turbine engines. Since boundary-lubrication data on synthetic fluids are limited, the effects of a wide range of sliding velocities on boundary lubrication were studied. Friction data and surface-failure properties showed that a silicone diester blend, an alkyl silicate ester, and a compounded diester (containing lubrication additives) were more effective lubricants at high sliding velocities than the comparable diesters from which the most widely accepted synthetic lubricants are made. The diesters as well as polyether, silicate ester, and phophonate esters are more effective boundary lubricants at high sliding velocities than petroleum oils of comparable viscosity. In a preliminary study of the mechanism of lubrication by diesters, it was found that a diester failed to lubricate nonreactive surfaces, possibly indicating that the mechanism may involve chemical reaction of the diesters with the lubricated surfaces.