Monoclinic Zirconia Distributions in Plasma-Sprayed Thermal Barrier Coatings
| Autor: | Michael J. Lance, Mattison K. Ferber, James A Haynes, W. R. Cannon |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Materials science
engineering.material Condensed Matter Physics Surfaces Coatings and Films Thermal barrier coating symbols.namesake Coating Phase (matter) Materials Chemistry symbols engineering Cubic zirconia Composite material Raman spectroscopy Porosity Yttria-stabilized zirconia Monoclinic crystal system |
| Zdroj: | Journal of Thermal Spray Technology. 9:68-72 |
| ISSN: | 1059-9630 |
| DOI: | 10.1361/105996300770350078 |
| Popis: | Phase composition in an air plasma-sprayed Y2O3-stabilized ZrO2 (YSZ) top coating of a thermal barrier coating (TBC) system was characterized. Both the bulk phase content and localized pockets of monoclinic zirconia were measured with Raman spectroscopy. The starting powder consisted of ∼15 vol.% monoclinic zirconia, which decreased to ∼2 vol.% in the as-sprayed coating. Monoclinic zirconia was concentrated in porous pockets that were evenly distributed throughout the TBC. The pockets resulted from the presence of unmelted granules in the starting powder. The potential effect of the distributed monoclinic pockets on TBC performance is discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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