Synthesis and Sintering of Nonstoichiometric (Mo<sub>0.2</sub>Nb<sub>0.2</sub>Ta<sub>0.2</sub>Ti<sub>0.2</sub>W<sub>0.2</sub>)C<sub>x</sub> Nanoscale Powders for Highly-Dense Ceramics.
Ontology highlight
ABSTRACT: Guided by thermodynamic calculations, this study successfully synthesized nonstoichiometric high-entropy carbide (Mo0.2Nb0.2Ta0.2Ti0.2W0.2)Cx (x = 0.875-0.972) nanometer-sized powders using micrometer-sized metal oxides (MoO3, Nb2O5, Ta2O5, TiO2, and WO3) and carbon black as raw materials through carbothermic reduction at 1400-1550 °C. The powders synthesized above 1500 °C exhibited a single-phase rock-salt structure with an average grain size as low as 270 nm. TEM analysis confirmed the lattice parameters increased from 0.4378 nm to 0.4395 nm with decreasing carbon content and synthesis temperature. After ball milling, the optimal powder was densif
SUBMITTER: Hai W
PROVIDER: S-EPMC12471743 | biostudies-literature | 2025 Sep
REPOSITORIES: biostudies-literature
ACCESS DATA
