Effects of Composition, Structure Design, and Coating Thickness of Thermal Barrier Coatings on Thermal Barrier Performance
| Autor: | Sung-Hoon Jung, Yeon-Gil Jung, In-Soo Kim, Baig-Gyu Choi, Je-Hyun Lee, Soo-Hyeok Jeon |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Durability Layered structure Thermal barrier coating Coating 0103 physical sciences Thermal Ceramics and Composites Structure design engineering Composite material 0210 nano-technology Layer (electronics) Stress concentration |
| Zdroj: | Journal of the Korean Ceramic Society. 53:689-699 |
| ISSN: | 2234-0491 1229-7801 |
| DOI: | 10.4191/kcers.2016.53.6.689 |
| Popis: | The effects of composition, structure design, and coating thickness of thermal barrier coating (TBC) on thermal barrier performance were investigated by measuring the temperature differences of TBC samples. TBCs with the thin and thick top coats were used for these studies, including TBCs with rare-earth (Gd, Yb, and La) compositions. The thermal barrier performance was enhanced with increasing the thickness of top coat even for thin TBCs, indicating that the thermal barrier performance was commensurate to the thickness of top coat. On the other hand, the bi-layered TBC, which was prepared with Yb-Gd-YSZ feedstock powder, with the buffer layer of high purity 8YSZ showed a better thermal barrier performance than that of regular purity 8YSZ. The interfaces in the bi-layered TBCs had a decisive effect on the thermal barrier performance, showing the performance enhanced with increasing numbers of interfaces. However, a new structural design and an additional process should be considered to reduce stress concentrations and to ensure interface stability, respectively, for improving thermal durability in the multilayered TBCs. |
| Databáze: | OpenAIRE |
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