ZrB2/C复合材料抗烧蚀性能及微观结构的研究

采用热压法制备ZrB2／C复合材料，利用氧乙炔火焰烧蚀法测试材料的质量烧蚀率和线烧蚀率，采用扫描电镜和X射线衍射分析材料的微观结构及物相变化。研究结果表明：和相同工艺制备的纯石墨材料相比，ZrB2的引入降低了炭材料的质量和线烧蚀率，ZrB2的加入量越大，烧蚀率降低幅度越大，ZrB2引入明显提高了炭材料的抗烧蚀性能；通过微观结构分析，探讨了ZrB2形态和含量对复合材料抗烧蚀性能影响的机理，研究结果展示了此材料作为高温烧蚀材料的良好应用前景。

Ablation Resistance Properties and Microstructure of ZrB2/C Composites

The mass and linear ablation rates of ZrB2/C composites prepared by hot-pressing method are tested in an oxyacetylene flame with high velocity gas. The microstructure and phase transformation of the composites are characterized by SEM and XRD analysis. Results show that the values of mass and linear ablation rates are lower in the composites than those measured for pure carbon, decreasing with increasing ZrB2 content. The ablation resistance mechanism is discussed according to microstructure analysis. The addition of ZrB2 significantly improves the ablation resistance of carbon-based composites, confirming that these materials are promising for ultra high temperature application.