Loading...
Please wait, while we are loading the content...
Similar Documents
Lubricating and wear mechanisms for a hemisphere sliding on polyimide-bonded graphite fluoride film
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Fusaro, R. L. |
| Copyright Year | 1979 |
| Description | Friction, wear life, rider wear, and film wear for a 440 C high-temperature-stainless-steel, hemispherically tipped rider sliding against polyimide-bonded graphite fluoride films were evaluated in a moist-air atmosphere at 25 C. Optical microscope and surface profilometry observations were made at various sliding intervals to determine how film thickness affected the lubricating and failure mechanisms of the films. Two lubrication regimes operated for the same load. In the first, the film supported the load and the lubricating mechanism consisted of the shear (plastic flow) of a thin layer of the lubricant between the metallic rider and the film surface. In the second, the film did not support the load (it was worn away) and the lubricating mechanism consisted of the shear of very thin lubricant films between flat areas generated on the rider and on sandblasted metallic asperities in the film wear track. Lubricant was supplied from the valleys between the asperities or from the sides of the wear track. With thicker films, wear life increased since a greater lubricant supply was available from the sides of the wear track. |
| File Size | 2070084 |
| Page Count | 31 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19790022210 |
| Archival Resource Key | ark:/13960/t5t776q7z |
| Language | English |
| Publisher Date | 1979-08-01 |
| Access Restriction | Open |
| Subject Keyword | Nonmetallic Materials Plastic Flow Fluorides Film Thickness Stainless Steels Coefficient of Friction Metal Surfaces Solid Lubricants Heat Resistant Alloys Wear Graphite Polyimides Lubrication Sliding Friction Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
