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Boro/carbothermal reduction co-synthesis of dual-phase high-entropy boride-carbide ceramics

Publication ,  Journal Article
Feng, L; Fahrenholtz, WG; Hilmas, GE; Curtarolo, S
Published in: Journal of the European Ceramic Society
June 1, 2023

Dense, dual-phase (Cr,Hf,Nb,Ta,Ti,Zr)B2-(Cr,Hf,Nb,Ta,Ti,Zr)C ceramics were synthesized by boro/carbothermal reduction of oxides and densified by spark plasma sintering. The high-entropy carbide content was about 14.5 wt%. Grain growth was suppressed by the pinning effect of the two-phase ceramic, which resulted in average grain sizes of 2.7 ± 1.3 µm for the high-entropy boride phase and 1.6 ± 0.7 µm for the high-entropy carbide phase. Vickers hardness values increased from 25.2 ± 1.1 GPa for an indentation load of 9.81 N to 38.9 ± 2.5 GPa for an indentation load of 0.49 N due to the indentation size effect. Boro/carbothermal reduction is a facile process for the synthesis and densification of dual-phase high entropy boride-carbide ceramics with both different combinations of transition metals and different proportions of boride and carbide phases.

Duke Scholars

Published In

Journal of the European Ceramic Society

DOI

EISSN

1873-619X

ISSN

0955-2219

Publication Date

June 1, 2023

Volume

43

Issue

6

Start / End Page

2708 / 2712

Related Subject Headings

  • Materials
  • 4016 Materials engineering
  • 0912 Materials Engineering
 

Citation

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ICMJE
MLA
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Feng, L., Fahrenholtz, W. G., Hilmas, G. E., & Curtarolo, S. (2023). Boro/carbothermal reduction co-synthesis of dual-phase high-entropy boride-carbide ceramics. Journal of the European Ceramic Society, 43(6), 2708–2712. https://doi.org/10.1016/j.jeurceramsoc.2022.12.056
Feng, L., W. G. Fahrenholtz, G. E. Hilmas, and S. Curtarolo. “Boro/carbothermal reduction co-synthesis of dual-phase high-entropy boride-carbide ceramics.” Journal of the European Ceramic Society 43, no. 6 (June 1, 2023): 2708–12. https://doi.org/10.1016/j.jeurceramsoc.2022.12.056.
Feng L, Fahrenholtz WG, Hilmas GE, Curtarolo S. Boro/carbothermal reduction co-synthesis of dual-phase high-entropy boride-carbide ceramics. Journal of the European Ceramic Society. 2023 Jun 1;43(6):2708–12.
Feng, L., et al. “Boro/carbothermal reduction co-synthesis of dual-phase high-entropy boride-carbide ceramics.” Journal of the European Ceramic Society, vol. 43, no. 6, June 2023, pp. 2708–12. Scopus, doi:10.1016/j.jeurceramsoc.2022.12.056.
Feng L, Fahrenholtz WG, Hilmas GE, Curtarolo S. Boro/carbothermal reduction co-synthesis of dual-phase high-entropy boride-carbide ceramics. Journal of the European Ceramic Society. 2023 Jun 1;43(6):2708–2712.
Journal cover image

Published In

Journal of the European Ceramic Society

DOI

EISSN

1873-619X

ISSN

0955-2219

Publication Date

June 1, 2023

Volume

43

Issue

6

Start / End Page

2708 / 2712

Related Subject Headings

  • Materials
  • 4016 Materials engineering
  • 0912 Materials Engineering