The report summarizes the research prior to that described in Volume III and presents the results of the most recent research in some detail. This covers a broadspectrum of data on a sensitive stick-slip friction apparatus; the detection of molecular order and orientation in quiescently formed solution films using frustrated-multiple-internal-reflection infrared spectroscopy (FMIR), and in the determination of the thermodynamic properties of selected film species using ellipsometric techniques. Experiments were performed on rubbed stearic acid films on three substrates - iron, chromium and copper. Using carefully controlled surface contact conditions, very pure iron and chromium substrates were used to form surface films from straight-chain hydrocarbon solutions and ester-commercial additive systems. The mechanical properties - frictin, shear stress and damping - were studied utilizing films formed in situ. This is also true for the measurement of thermodynamic properties though no dynamic rubbing contact was involved in the ellipsometric determinations.
Aircraft propulsion lubricating film additives: boundary lubricant surface films
Additive fuer Schmierfilme von Flugzeugmotoren: Oberflaechenschmierfilme
US Government Reports ; 1-119
1976
119 Seiten
Report
Englisch
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