Abstract
The synthesis and characterization along with the resulting properties of fully dense (Cr,Mo,Ta,V,W)C high entropy carbide ceramics were studied. The ceramics were synthesized from metal oxide and carbon powders by carbothermal reduction, followed by spark plasma sintering at various temperatures for densification. Increasing the densification temperature resulted in grain growth and an increase in the lattice parameter. Thermal diffusivity increased linearly with testing temperature, resulting in thermal conductivity values ranging from ∼7 W/m•K at room temperature to ∼12 W/m•K at 200 °C. Measured heat capacity values matched theoretical estimates calculated using the Neumann-Kopp rule. Room temperature electrical resistivity decreased from ∼137 to ∼120 μΩ•cm as the nominal excess carbon decreased from 5.4 to 0.1 vol%, suggesting an enhanced electronic contribution to thermal conductivity as excess carbon decreased. All specimens exhibited a Vickers hardness of ∼29 GPa under a 0.49 N load. These results underscore the tunability of this high entropy carbide system.
Recommended Citation
A. Sarikhani et al., "Thermal and Electrical Properties of (Cr,Mo,Ta,V,W)C High-entropy Carbide Ceramics," Journal of the European Ceramic Society, vol. 46, no. 11, article no. 118347, Elsevier, Sep 2026.
The definitive version is available at https://doi.org/10.1016/j.jeurceramsoc.2026.118347
Department(s)
Materials Science and Engineering
Publication Status
Full Text Access
Keywords and Phrases
(Cr,Mo,Ta,V,W)C; High-entropy carbide; Microstructure; Properties; Spark plasma sintering; Ultra-high temperature ceramic
International Standard Serial Number (ISSN)
1873-619X; 0955-2219
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2026 Elsevier, All rights reserved.
Publication Date
01 Sep 2026
Comments
Office of Naval Research, Grant N00014–24–1–2768