@article{Shao2025, 
author = {Zhuojie Shao and Dawei Zeng and Mengjun Xu and Xirui Lv and Zhen Wu and Luchao Sun and Jingyang Wang},
title = {A novel highly porous dual-phase high-entropy ultrahigh-temperature ceramic with outstanding properties},
year = {2025},
journal = {Journal of Advanced Ceramics},
volume = {14},
number = {9},
pages = {9221132},
keywords = {porous ceramics, high porosity, low thermal conductivity, high strength, dual-phase high-entropy ultrahigh-temperature ceramics},
url = {https://www.sciopen.com/article/10.26599/JAC.2025.9221132},
doi = {10.26599/JAC.2025.9221132},
abstract = {Ultrahigh-temperature ceramics (UHTCs) have a unique combination of high melting points, high strengths, and high chemical stabilities, which makes them unique materials for a wide range of ultrahigh-temperature (> 2000 °C) applications. Herein, we first report a novel highly porous dual-phase high-entropy UHTCs material composed of a high-entropy boride (HEB) phase and a high-entropy carbide (HEC) phase, which was fabricated via foam-gelcasting-freeze drying technology and high-temperature sintering with mixed borides and carbides as raw materials. The as-fabricated samples have a uniform pore structure and a firm skeleton that consists of random alternating distributions of HEB and HEC particles. The porous dual-phase high-entropy UHTCs samples have ultrahigh porosities of 96.4%–90.1%, low densities of 0.31–0.87 g/cm3, high strengths of 0.45–4.17 MPa and low thermal conductivities of 0.202–0.281 W/(m·K), as well as better oxidation resistance than single-phase HEC. The present results highlight the potential of as-prepared porous dual-phase high-entropy UHTCs as promising materials for ultrahigh-temperature thermal insulation applications.}
}