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Powder-derived high-conductivity coatings for copper alloys
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Thomas-Ogbuji, Linus U. |
| Copyright Year | 2003 |
| Description | Makers of high-thermal-flux engines prefer copper alloys as combustion chamber liners, owing to a need to maximize heat dissipation. Since engine environments are strongly oxidizing in nature and copper alloys generally have inadequate resistance to oxidation, the liners need coatings for thermal and environmental protection; however, coatings must be chosen with great care in order to avoid significant impairment of thermal conductivity. Powder-derived chromia- and alumina- forming alloys are being studied under NASA's programs for advanced reusable launch vehicles to succeed the space shuttle fleet. NiCrAlY and Cu-Cr compositions optimized for high thermal conductivity have been tested for static and cyclic oxidation, and for susceptibility to blanching - a mode of degradation arising from oxidation-reduction cycling. The results indicate that the decision to coat the liners or not, and which coating/composition to use, depends strongly on the specific oxidative degradation mode that prevails under service conditions. |
| File Size | 4733681 |
| Page Count | 31 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20040034073 |
| Archival Resource Key | ark:/13960/t9t19zm23 |
| Language | English |
| Publisher Date | 2003-10-30 |
| Access Restriction | Open |
| Subject Keyword | Metals And Metallic Materials Thermal Control Coatings Copper Alloys Linings Aluminum Alloys Oxidation Oxidation-reduction Reactions Combustion Chambers Powder Metallurgy Chromium Alloys Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Presentation |
