Phase formation, stability and heat capacity of ternary TiO2–CeO2–ZrO2 solid solutions
| Autor: | S. N. Golubev, Artem G. Glukharev, Olga Yu Kurapova, Vladimir G. Konakov, Anna S. Borisova |
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| Rok vydání: | 2020 |
| Předmět: |
Phase transition
Ternary numeral system Materials science Rietveld refinement 02 engineering and technology Calorimetry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Thermal barrier coating Chemical engineering General Materials Science Crystallite 0210 nano-technology Ternary operation Solid solution |
| Zdroj: | Materials Chemistry and Physics. 242:122547 |
| ISSN: | 0254-0584 |
| Popis: | Tetragonal zirconia based solid solutions are important materials for thermal barrier coatings (TBCs). The introduction of the third component to binary zirconia systems is regarded as a promising way to design novel high performance TBCs. The work reports the investigation of solid solution formation in ternary TiO2–CeO2–ZrO2 system in the range 600–1100 °C obtained by using co-precipitation from mixed aqueous solution and freeze-drying. Phase evolution and stability of solid solutions were investigated using DSC, qualitative and quantitative XRD analysis with Rietveld refinement technique. The factors affecting the kinetics of phase formation i.e. powders dispersity, agglomerate strength, crystallite size, Ce3+/Ce4+ ratio were studied using PSD, XRD and ESCA techniques. The heat capacity dependence on temperature was measured experimentally for the first time for 5TiO2–9CeO2–86ZrO2 composition via calorimetry technique using DSC. The obtained data significantly contributes to the schematic phase diagram suggested in the literature and allows to choose the optimal synthesis and processing conditions of ternary system compositions for their use for novel TBCs fabrication. |
| Databáze: | OpenAIRE |
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