Loading...
Please wait, while we are loading the content...
Similar Documents
Screen cage ion plating (scip) and scratch testing of polycrystalline aluminum oxide
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Deadmore, Daniel L. Sliney, Harold E. Spalvins Sr., Talivaldis |
| Copyright Year | 1992 |
| Description | A screen cage ion plating (SCIP) technique was developed to apply silver films on electrically nonconducting aluminum oxide. It is shown that SCIP has remarkable throwing power; surfaces to be coated need not be in direct line of sight with the evaporation source. Scratch tests, employing a diamond stylus with a 200 micro m radius tip, were performed on uncoated and on silver coated alumina. Subsequent surface analysis show that a significant amount of silver remains on the scratched surfaces, even in areas where high stylus load produced severe crack patterns in the ceramic. Friction coefficients were lowered during the scratch tests on the coated alumina indicating that this modification of the ion planting process should be useful for applying lubricating films of soft metals to electrical insulating materials. The very good throwing power of SCIP also strongly suggests general applicability of this process in other areas of technology, e.g., electronics, in addition to tribology. |
| File Size | 6291400 |
| Page Count | 16 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19920013035 |
| Archival Resource Key | ark:/13960/t0gv0hm9c |
| Language | English |
| Publisher Date | 1992-02-01 |
| Access Restriction | Open |
| Subject Keyword | Nonmetallic Materials Performance Tests Photomicrographs Polycrystals Ceramics Coatings Silver Coefficient of Friction Metal Films Ion Plating Solid Lubricants Materials Tests Lubrication Surface Cracks Lubricant Tests Aluminum Oxides Tribology Ntrs Nasa Technical Reports ServerĀ (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |