Volcanic ash infiltration resistance of new-generation thermal barrier coatings at 1150 °C
| Autor: | Sivakumar Govindarajan, Shamnugavelayutham Gurusamy, Praveen Kandasamy |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Composite number chemistry.chemical_element 02 engineering and technology engineering.material Anorthite 01 natural sciences Apatite Thermal barrier coating 0103 physical sciences Materials Chemistry Lanthanum Cubic zirconia Yttria-stabilized zirconia 010302 applied physics Spinel Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Surfaces Coatings and Films chemistry Chemical engineering visual_art engineering visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Surface and Coatings Technology. 401:126226 |
| ISSN: | 0257-8972 |
| DOI: | 10.1016/j.surfcoat.2020.126226 |
| Popis: | The recent developments in advanced materials for thermal barrier coatings (TBCs) have put thrust towards the progress of new materials due to their superior performance over the state-of-the-art yttria-stabilized zirconia (YSZ). Lanthanum cerate (La2Ce2O7, LC) is one of the promising candidates used against the infiltration of calcium magnesium alumino-silicate (CMAS) melt. For a highly efficient low thermally conductive material, gadolinium oxide doped lanthanum cerate ((La0.9Gd0.1)2Ce2O7, Gd-LC) was synthesized as a new aspirant. Deposits of atmospheric plasma sprayed (APS) LC, Gd-LC coatings were generated, and their interactions against the infiltration of volcanic ash were studied. Both the coatings formed the apatite phase interaction layer, with a considerable quantity of anorthite and spinel phases. On comparison, Gd-LC showed significantly more resistance than LC coatings because of the presence of Gd apatite in Gd-LC coatings. Further, we developed Gd-LC single layer, double-layer, and composite hybrid coatings by employing APS and solution precursor plasma spraying process (SPPS). Phase evolution and microstructural features were studied and are discussed in detail. |
| Databáze: | OpenAIRE |
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