HfC-VC-SiC composite ceramic
65% lower ablation rate
Incorporating VC optimizes oxide layer melt viscosity and self-healing, forming a dense double-layer oxide scale above 2500°C for greatly improved ablation resistance.
Tian, Tian · Yueheng, Zhang · Sun, Wei · Shen, Yuzhu · Ziwei, Wang · Qiao, Yu · Wen, Qingbo · Chen, Pengju · Neng, Li · Xiong, Xiang
Advanced Powder Materials 2026
Specifications
- Linear ablation rate reduction
- {'zh': '65.46', 'en': '65.46'} %
- Flexural strength
- {'zh': '221.24', 'en': '221.24'} MPa
Advantages
65.46% lower ablation rate
The dense double-layer oxide scale synergistically inhibits further oxidation and mechanical denudation, greatly reducing the linear ablation rate.
38% higher flexural strength
VC improves the reactive melt infiltration behavior, leading to a more uniform ceramic distribution; flexural strength increases from 160.22 MPa to 221.24 MPa.
Dense double-layer oxide scale
Through the pinning, melting and reaction strengthening of the HfO2 skeleton, coupled with the self-healing of SiO2 and V2O3 composite melt, a dense double-layered oxide layer is formed.
Applications
- Thermal protection materials：Provides stable ablation-resistant thermal protection above 2500°C, extending component lifetime.
- Ultra-high temperature ceramic matrix composites：The HfC-VC-SiC system optimizes melt self-healing, widening the application window for UHTCs.
- Thermal protection for hypersonic vehicles：Leading edges and other parts form a dense oxide layer under aerodynamic heating, resisting ablation.
- Reentry thermal protection for spacecraft：The protective layer remains intact under extreme reentry heat flux, ensuring structural integrity.
- Carbon/carbon composites：Enhances the ablation resistance and flexural strength of C/C matrices, expanding their applicable scope.