Ultrastrong and High Thermal Insulating Porous High‐Entropy Ceramics up to 2000 °C

Abstract High mechanical load‐carrying capability and thermal insulating performance are crucial to thermal‐insulation materials under extreme conditions. However, these features are often difficult to achieve simultaneously in conventional porous ceramics. Here, for the first time, it is reported a multiscale structure design and fast fabrication of 9‐cation porous high‐entropy diboride ceramics via an ultrafast high‐temperature synthesis technique that can lead to exceptional mechanical load‐bearing capability and high thermal insulation performance. With the construction of multiscale structures involving ultrafine pores at the microscale, high‐quality interfaces between building blocks at the nanoscale,…

• NN
  National Natural Science Foundation of China

  Awards: 52122204, 51972116
• NK
  National Key Research and Development Program of China

  Award: 2022YFB3708600