Affiliation:
1. The Cultivation Base of Shanxi Key Laboratory of Mining Aera Ecological Restoration and Solid Wastes Utilization Shanxi Institute of Technology Yangquan China
2. The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Wuhan China
3. College of Engineering, Mathematics and Physical Sciences University of Exeter Exeter UK
Abstract
AbstractA combined theoretical and experimental approach was used to investigate high‐entropy carbonitride. Density functional theory (DFT) calculations suggest that the [N]/([C]+[N]) ratio in (Ti1/6Cr1/6V1/6Mo1/6Nb1/6Ta1/6)(C1−xNx) affects its lattice thermal conductivity which could be decreased by 89% by increasing the ratio from 0 to 1/2. Moreover, a robust, flame‐retardant and high‐temperature resistant (Ti1/6Cr1/6V1/6Mo1/6Nb1/6Ta1/6)(C0.64N0.36) high‐entropy carbonitride aerogel (6‐HECNA) was synthesized. It exhibited a porosity of 94.3%, a compressive strength of 0.9 MPa, and a good high‐temperature stability up to 1673 K. These properties, along with its outstanding fire‐retardancy, and low thermal conductivity (0.122 W·m−1·K−1 at 298 K), make it a promising candidate material for thermal insulation applications under harsh conditions.
Funder
China Postdoctoral Science Foundation
China Scholarship Council
National Natural Science Foundation of China