Vacancy Ordering In Zirconium Carbide With Different Carbon Contents

Author

Yue Zhou
Jeremy Lee Watts, Missouri University of Science and TechnologyFollow
Cheng Li
William Fahrenholtz, Missouri University of Science and TechnologyFollow
Gregory E. Hilmas, Missouri Unviersity of Science and TechnologyFollow

Abstract

Zirconium carbide (ZrCx) ceramics with different carbon contents were prepared by reactive hot-pressing. The rock-salt structure of ZrCx was the only phase detected by x-ray diffraction of the hot pressed ceramics. The relative densities of ZrCx decreased as carbon content increased, in general. The actual carbon contents were measured by completely oxidizing the ZrCx ceramics to ZrO₂. For most compositions, the actual carbon contents were higher than nominal batched compositions, presumably due to carbon uptake from the graphite furnace and hot press dies. Selected area electron diffraction and neutron powder diffraction revealed the presence of carbon vacancy ordering in ZrCx for 0.6 < x < 0.75. Rietveld refinement of the neutron diffraction patterns determined that the crystal structure of the ordered phase was hexagonal, and the carbon site occupancies were higher than nominal batched carbon stoichiometry.

Recommended Citation

Y. Zhou et al., "Vacancy Ordering In Zirconium Carbide With Different Carbon Contents," Journal of the European Ceramic Society, vol. 43, no. 14, pp. 5814 - 5821, Elsevier, Nov 2023.

The definitive version is available at https://doi.org/10.1016/j.jeurceramsoc.2023.05.044

Department(s)

Materials Science and Engineering

Comments

Office of Science, Grant DMR 174284

Keywords and Phrases

Densification; Ordered phase; Stoichiometry; Zirconium carbide

International Standard Serial Number (ISSN)

1873-619X; 0955-2219

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2023 Elsevier, All rights reserved.

Publication Date

01 Nov 2023