Degradation in a Thermal Barrier Coating
The failure of a thermal barrier coating involves cracking and spalling of the ceramic layer, primarily brought about by bond-coat oxidation during operation. The present investigation focuses on the microstructural and microchemical changes in a thermal barrier coating, oxidized in air for 1 and 10...
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| Veröffentlicht in: | Advanced Ceramic Materials 1987-01, Vol.2 (1), p.60-64 |
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| container_title | Advanced Ceramic Materials |
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| creator | SHINDE, S.L. REIMANIS, I.E. DE JONGHE, L.C. |
| description | The failure of a thermal barrier coating involves cracking and spalling of the ceramic layer, primarily brought about by bond-coat oxidation during operation. The present investigation focuses on the microstructural and microchemical changes in a thermal barrier coating, oxidized in air for 1 and 10 h at 900{degree}C. The zirconia coating shows a gradual increase in the amount of monoclinic phase with time at temperature. The bond-coat layer shows substantial aluminum depletion in the region adjacent to the ceramic. This aluminum forms an oxide layer (Al{sub 2}O{sub 3}) at the interface. However, nickel oxide (NiO) is also found to be another important oxidation product. The relevance of these observations to the degradation observed in thermal barrier coatings is discussed. |
| doi_str_mv | 10.1111/j.1551-2916.1987.tb00054.x |
| format | Article |
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The present investigation focuses on the microstructural and microchemical changes in a thermal barrier coating, oxidized in air for 1 and 10 h at 900{degree}C. The zirconia coating shows a gradual increase in the amount of monoclinic phase with time at temperature. The bond-coat layer shows substantial aluminum depletion in the region adjacent to the ceramic. This aluminum forms an oxide layer (Al{sub 2}O{sub 3}) at the interface. However, nickel oxide (NiO) is also found to be another important oxidation product. 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The present investigation focuses on the microstructural and microchemical changes in a thermal barrier coating, oxidized in air for 1 and 10 h at 900{degree}C. The zirconia coating shows a gradual increase in the amount of monoclinic phase with time at temperature. The bond-coat layer shows substantial aluminum depletion in the region adjacent to the ceramic. This aluminum forms an oxide layer (Al{sub 2}O{sub 3}) at the interface. However, nickel oxide (NiO) is also found to be another important oxidation product. 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The present investigation focuses on the microstructural and microchemical changes in a thermal barrier coating, oxidized in air for 1 and 10 h at 900{degree}C. The zirconia coating shows a gradual increase in the amount of monoclinic phase with time at temperature. The bond-coat layer shows substantial aluminum depletion in the region adjacent to the ceramic. This aluminum forms an oxide layer (Al{sub 2}O{sub 3}) at the interface. However, nickel oxide (NiO) is also found to be another important oxidation product. The relevance of these observations to the degradation observed in thermal barrier coatings is discussed.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1111/j.1551-2916.1987.tb00054.x</doi><tpages>5</tpages><oa>free_for_read</oa></addata></record> |
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| identifier | ISSN: 0883-5551 |
| ispartof | Advanced Ceramic Materials, 1987-01, Vol.2 (1), p.60-64 |
| issn | 0883-5551 1551-2916 |
| language | eng |
| recordid | cdi_istex_primary_ark_67375_WNG_1DGTNBZ4_X |
| source | Wiley Online Library Journals Frontfile Complete |
| subjects | 330102 - Internal Combustion Engines- Diesel 360202 - Ceramics, Cermets, & Refractories- Structure & Phase Studies 360205 - Ceramics, Cermets, & Refractories- Corrosion & Erosion ADVANCED PROPULSION SYSTEMS CHALCOGENIDES CHEMICAL REACTIONS COATINGS CRYSTAL STRUCTURE DATA DECOMPOSITION EXPERIMENTAL DATA INFORMATION LATTICE PARAMETERS MATERIALS SCIENCE MICROSTRUCTURE NUMERICAL DATA OXIDATION OXIDES OXYGEN COMPOUNDS PROTECTIVE COATINGS TRANSITION ELEMENT COMPOUNDS VERY HIGH TEMPERATURE ZIRCONIUM COMPOUNDS ZIRCONIUM OXIDES |
| title | Degradation in a Thermal Barrier Coating |
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