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Synthesis and properties of (Hf,Mo,Ti,W,Zr)B2–(Hf,Mo,Ti,W,Zr)C dual phase ceramics

Publication ,  Journal Article
Filipović, S; Smith, SM; Hilmas, G; Fahrenholtz, W; Obradović, N; Curtarolo, S
Published in: Journal of the European Ceramic Society
November 1, 2024

Dense, dual phase (Hf,Mo,Ti,W,Zr)B2–(Hf,Mo,Ti,W,Zr)C ceramics were synthesized with varying contents of Mo and W. The final (Hf0.317Mo0.025Ti0.317W0.025Zr0.317)C–(Hf0.317Mo0.025Ti0.317W0.025Zr0.317)B2 was a nominally pure, dual phase ceramic, while compositions with higher amounts of Mo and W contained multiple phases. The final microstructures had submicron grains due to pinning effects. Vickers hardness values were up to 48.6 ± 2.2 GPa for an applied load of 0.49 N for the ceramic with optimized composition and densification. The solubility limits for Mo and W into the (Hf,Mo,Ti,W,Zr)B2–(Hf,Mo,Ti,W,Zr)C ceramics were mitigated by decreasing their contents to 2.5 at% each, which produced a nominally pure dual phase ceramic that could be densified by spark plasma sintering or hot pressing. A synergistic hardening effect was observed for optimized ceramic with 5 at% of Mo and W, whereby it had a higher hardness than individual high entropy carbide and high entropy boride phases containing the same transition metals.

Duke Scholars

Published In

Journal of the European Ceramic Society

DOI

EISSN

1873-619X

ISSN

0955-2219

Publication Date

November 1, 2024

Volume

44

Issue

14

Related Subject Headings

  • Materials
  • 4016 Materials engineering
  • 0912 Materials Engineering
 

Citation

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Filipović, S., Smith, S. M., Hilmas, G., Fahrenholtz, W., Obradović, N., & Curtarolo, S. (2024). Synthesis and properties of (Hf,Mo,Ti,W,Zr)B2–(Hf,Mo,Ti,W,Zr)C dual phase ceramics. Journal of the European Ceramic Society, 44(14). https://doi.org/10.1016/j.jeurceramsoc.2024.116670
Filipović, S., S. M. Smith, G. Hilmas, W. Fahrenholtz, N. Obradović, and S. Curtarolo. “Synthesis and properties of (Hf,Mo,Ti,W,Zr)B2–(Hf,Mo,Ti,W,Zr)C dual phase ceramics.” Journal of the European Ceramic Society 44, no. 14 (November 1, 2024). https://doi.org/10.1016/j.jeurceramsoc.2024.116670.
Filipović S, Smith SM, Hilmas G, Fahrenholtz W, Obradović N, Curtarolo S. Synthesis and properties of (Hf,Mo,Ti,W,Zr)B2–(Hf,Mo,Ti,W,Zr)C dual phase ceramics. Journal of the European Ceramic Society. 2024 Nov 1;44(14).
Filipović, S., et al. “Synthesis and properties of (Hf,Mo,Ti,W,Zr)B2–(Hf,Mo,Ti,W,Zr)C dual phase ceramics.” Journal of the European Ceramic Society, vol. 44, no. 14, Nov. 2024. Scopus, doi:10.1016/j.jeurceramsoc.2024.116670.
Filipović S, Smith SM, Hilmas G, Fahrenholtz W, Obradović N, Curtarolo S. Synthesis and properties of (Hf,Mo,Ti,W,Zr)B2–(Hf,Mo,Ti,W,Zr)C dual phase ceramics. Journal of the European Ceramic Society. 2024 Nov 1;44(14).
Journal cover image

Published In

Journal of the European Ceramic Society

DOI

EISSN

1873-619X

ISSN

0955-2219

Publication Date

November 1, 2024

Volume

44

Issue

14

Related Subject Headings

  • Materials
  • 4016 Materials engineering
  • 0912 Materials Engineering