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Chemical vapor deposition of high t sub c superconductors
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Webb, G. W. Engelhardt, J. J. |
| Copyright Year | 1978 |
| Description | The results are reported of an investigation into the synthesis and properties of high temperature superconducting materials. A chemical vapor deposition apparatus was designed and built which is suitable for the preparation of multicomponent metal films This apparatus was used to prepare a series of high T sub c A-15 structure superconducting films in the binary system Nb-Ge. The effect on T sub c of a variety of substrate materials was investigated. An extensive series of ternary alloys were also prepared. Conditions allowing the brittle high T sub c (approximately 18 K) A-15 structure superconductor Nb3A1 to be prepared in a low T sub c but ductile form were found. Some of the ways that the ductile (bcc) form can be cold worked or machined are described. Measurements of rate of transformation of cold worked bcc material to the high T sub c A-15 structure with low temperature annealing are given. Preliminary measurements indicate that this material has attractive high field critical current densities. |
| File Size | 3519374 |
| Page Count | 61 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19790010942 |
| Archival Resource Key | ark:/13960/t55f3mn66 |
| Language | English |
| Publisher Date | 1978-12-31 |
| Access Restriction | Open |
| Subject Keyword | Inorganic And Physical Chemistry Chemical Machining Superconducting Films Vapor Deposition Metal Films Ductility Alloys High Temperature Superconductors Chemical Composition Brittleness 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 |
