The Effects of Oxide and Organic Films on Sliding Friction
In the past three years, an investigation has been made at Southwest Research Institute on the friction and wear behavior of ostensibly clean metals , of steel with lead films present , of copper with oxide films present , and of copper, iron, and gold with organic films present. The work was done with a bullet-on-sleeve or a bullet-on-disk apparatus of the same basic design. Low sliding speeds (0.10–0.25 mm/sec) were used to minimize interfacial heating and hydrodynamic effects. The temperature ranged from + 150 down to −250°C, with emphasis on low temperatures. The basic experiments were performed in a dry, pure helium atmosphere, in an effort to provide an environment nearly free of oxygen and organic contaminants. However, the effects of dry and wet air were also studied to generate comparative data in some key instances. This paper summarizes the salient aspects of the work on ostensibly clean metals, oxide films, and organic films.
KeywordsOxide Film Pour Point Caprylic Acid Organic Film Clean Metal
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