Bond strength, bond stress and spallation mechanisms of thermal barrier coatings
| Autor: | Yongho Sohn, Vladamir K. Tolpygo, Kathleen McCarron, Maurice Gell, Vaidyanathan Krishnakumar, Jordan Eric, Brent Barber |
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| Rok vydání: | 1999 |
| Předmět: |
Materials science
Bond strength Oxide Surfaces and Interfaces General Chemistry Temperature cycling engineering.material Condensed Matter Physics Electron beam physical vapor deposition Surfaces Coatings and Films Thermal barrier coating Stress (mechanics) chemistry.chemical_compound Coating chemistry Materials Chemistry Forensic engineering engineering Spallation Composite material |
| Zdroj: | ResearcherID |
| ISSN: | 0257-8972 |
| DOI: | 10.1016/s0257-8972(99)00338-2 |
| Popis: | Five production thermal barrier coatings were thermally cycled between room temperature and 1121°C (2050°F) to determine relative spallation life. Bond strength measurements were made using a modified ASTM direct pull-test. Bond stress measurements were made in the thermally grown oxide using a laser photoluminescence technique. Bond strength and bond stress measurements were conducted on two electron beam physical vapor deposition coatings as a function of thermal cycling. Each coating showed characteristic values of as-coated strength and stress and changes in strength and stress with thermal cycling. These variations in strength and stress with thermal cycling are related to oxidation and micro-debonding effects. |
| Databáze: | OpenAIRE |
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