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Effects of yttrium, aluminum, and chromium concentrations in bond coatings on the performance of zirconia-yttria thermal barriers
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Stecura, S. |
| Copyright Year | 1979 |
| Description | A cyclic furnace study was conducted between 990 - 280 C and 1095 - 280 C to evaluate the effects of yttrium, chromium, and aluminum concentrations in nickel base alloy bond coatings and also the effect of the bond coating thickness on the performance of yttria-stabilized zirconia thermal barrier coatings. The presence and the concentration of yttrium is very critical. Without yttrium, rapid oxidation of Ni-Al, Ni-Cr, and Ni-Cr-Al bond coatings causes zirconia thermal barrier coatings to fail very rapidly. Concentrations of chrominum and aluminum in Ni-Cr-Al-Y bond coating have a very significant effect on the thermal barrier coating life. This effect, however, is not as great as that due to yttrium. Furthermore, the thickness and the thickness uniformity also have a very significant effect on the life of the thermal barrier system. |
| File Size | 1792406 |
| Page Count | 31 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19790021122 |
| Archival Resource Key | ark:/13960/t6h17tk71 |
| Language | English |
| Publisher Date | 1979-07-01 |
| Access Restriction | Open |
| Subject Keyword | Metallic Materials Zirconium Thermal Control Coatings Aluminum Yttria-stabilized Zirconia Alloys High Temperature Tests Chromium Oxidation Nickel Yttrium 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 |
