Synthesis and characterization of spherical Yb2SiO5 powder using solid-state diffusional reaction and spray dry process
| Autor: | A. Abedi Nieai, M. Shojaie Bahaabad, A. Hassani Arefi, Majid Mohammadi |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Ytterbium Materials science Scanning electron microscope chemistry.chemical_element Nanoparticle 02 engineering and technology Substrate (electronics) engineering.material 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Coating Chemical engineering chemistry Spray drying 0103 physical sciences Particle-size distribution engineering 0210 nano-technology |
| Zdroj: | Journal of the Australian Ceramic Society. 56:469-476 |
| ISSN: | 2510-1579 2510-1560 |
| Popis: | Ytterbium monosilicate (Yb2SiO5) powder was successfully synthesized by the solid-state diffusional process at a low temperature (1350 °C) to serve as an environmental barrier coating (EBC). The stabilization procedure of the synthesized powder in the spray drying process was also presented. The synthesized monosilicate powder was used as a starting material in the EBC development. Ytterbium monosilicate coating was applied on the SiC/C ceramic composite substrate using the conventional atmospheric plasma spray (APS) technique. XRD analysis of the synthesized powder after the spray drying process showed a complete reaction between silica (SiO2) nanoparticles and ytterbium oxide (Yb2O3), leading to the formation of Yb2SiO5 without any side-product. Powder morphology, the corresponding elemental analysis of the spray-dried powder, and the microstructure of monosilicate coatings on the SiC/C substrate were investigated by the scanning electron microscopy (SEM). The particle size distribution of the spherical powder was found to be in the range of 20–80 μm. The thickness of the Yb2SiO5 coating was also in the range of 60–70 μm. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink