In-situ boron carbide / high-entropy boride composite ceramic material with core-shell structure and preparation method thereof
By generating core-shell structured boron carbide/high-entropy boride composite ceramic materials in situ, the problems of insufficient fracture toughness and bending strength of boron carbide ceramics have been solved, achieving a leapfrog improvement in material performance, which is suitable for impact-resistant plates.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHIJIAZHUANG TIEDAO UNIV
- Filing Date
- 2026-05-14
- Publication Date
- 2026-07-17
AI Technical Summary
Existing boron carbide ceramic materials have low fracture toughness and flexural strength, which limits their application in harsh working conditions, and traditional toughening methods have failed to effectively improve their overall mechanical properties.
In-situ generated core-shell structured boron carbide/high-entropy boride composite ceramic material is produced by dissolving transition metal alkoxides, boron sources, and carbon sources in an organic solvent to form a sol, which is then dried and hot-pressed to form a core-shell structure. This, combined with the physical compatibility of high-entropy boride particles and the pinning and crack deflection mechanisms, improves the fracture toughness and flexural strength of the material.
While maintaining the low density and high hardness of boron carbide, the fracture toughness and bending strength of the material are significantly improved, achieving the best balance of density, Vickers hardness, fracture toughness and bending strength. The comprehensive mechanical properties far exceed those of pure boron carbide ceramics and traditional second-phase toughened materials.
Smart Images
Figure CN122403994A_ABST