Loading...
Please wait, while we are loading the content...
Similar Documents
Self-lubricating coatings for high-temperature applications (Document No: 19920013273)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Sliney, Harold E. |
| Copyright Year | 1990 |
| Description | Solid lubricants with maximum temperature capabilities of about 1100 C are known. Unfortunately, none of the solid lubricants with the highest temperature capabilities are effective below 400 C. However, research at NASA's Lewis Research Center shows that silver and stable fluorides such as calcium and barium fluorides act synergistically to provide lubrication from below room temperature to about 900 C. This paper describes plasma-sprayed composite coatings that contain these solid lubricants in combination with a metal-bonded chromium carbide. The lubricants control friction, and the carbide matrix provides wear resistance. Successful tests of these coatings as backup lubricants for compliant gas bearings in turbomachinery and as self-lubricating liners in a four-cylinder Stirling engine are discussed. |
| File Size | 637298 |
| Page Count | 12 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19920013273 |
| Archival Resource Key | ark:/13960/t49p7zb28 |
| Language | English |
| Publisher Date | 1990-02-01 |
| Access Restriction | Open |
| Subject Keyword | Nonmetallic Materials Silver Composite Materials Chromium Carbides Barium Fluorides Solid Lubricants Turbomachinery Wear Resistance Lubrication Stirling Engines Calcium Fluorides Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
