Characterization of zirconium carbide microspheres synthesized via internal gelation
| Autor: | William F. Cureton, Maik Lang, Changyong Park, Patrick C. Huston, Devon L. Drey, J. Matthew Kurley, Jake W. McMurray, S. Michelle Everett |
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| Rok vydání: | 2021 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Scanning electron microscope Neutron diffraction chemistry.chemical_element Microstructure Grain size Zirconium carbide chemistry.chemical_compound Nuclear Energy and Engineering chemistry Chemical engineering Phase (matter) General Materials Science Crystallite Carbon |
| Zdroj: | Journal of Nuclear Materials. 557:153218 |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/j.jnucmat.2021.153218 |
| Popis: | Microspheres of zirconium carbide with grain size 40-320 nm were synthesized using internal gelation techniques and characterized by scanning electron microscopy, synchrotron X-ray diffraction, and neutron total scattering. Compared with a polycrystalline benchmark ZrC sample prepared by plasma vapor phase deposition, the microspheres display lower variance in grain size and considerably lower microstrain, representative of a more homogenous internal microstructure. However, excess carbon was present in the microspheres, evident in both the X-ray and neutron diffraction data as well as a corresponding hypostoichiometric ZrC phase. The excess carbon phase is assumed to be pockets of carbon that remained unreacted through the combined internal gelation and subsequent carbothermic reduction synthesis process. Atomic-scale structural characterization with neutron PDF analysis confirmed the presence of localized nano-sized domains of graphite-like carbon material. |
| Databáze: | OpenAIRE |
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