Loading...
Please wait, while we are loading the content...
Similar Documents
Characterization and durability testing of plasma-sprayed zirconia-yttria and hafnia-yttria thermal barrier coatings. part 2: effect of spray parameters on the performance of several hafnia-yttria and zirconia-yttria coatings
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Leissler, George W. Miller, Robert A. |
| Copyright Year | 1993 |
| Description | This is the second of two reports which discuss initial experiments on thermal barrier coatings prepared and tested in newly upgraded plasma spray and burner rig test facilities at LeRC. The first report, part 1, describes experiments designed to establish the spray parameters for the baseline zirconia-yttria coating. Coating quality was judged primarily by the response to burner rig exposure, together with a variety of other characterization approaches including thermal diffusivity measurements. That portion of the study showed that the performance of the baseline NASA coating was not strongly sensitive to processing parameters. In this second part of the study, new hafnia-yttria coatings were evaluated with respect to both baseline and alternate zirconia-yttria coatings. The hafnia-yttria and the alternate zirconia-yttria coatings were very sensitive to plasma-spray parameters in that high-quality coatings were obtained only when specific parameters were used. The reasons for this important observation are not understood. |
| File Size | 7648834 |
| Page Count | 20 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19940018994 |
| Archival Resource Key | ark:/13960/t76t5kr0n |
| Language | English |
| Publisher Date | 1993-03-01 |
| Access Restriction | Open |
| Subject Keyword | Metallic Materials Characterization Sprayed Coatings Test Facilities Thermal Control Coatings Hafnium Oxides Zirconium Oxides Thermal Diffusivity Durability Burners Plasma Spraying Protective Coatings Yttrium Oxides 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 |
