Preparing of 3D C/SiC-TaC composites using slurry and CVI method and research on anti-ablation property

Using a kind of slurry which contains 1μm TaC fillers 4% (volume fraction) to introduce TaC fillers into 10 mm thick 3D carbon fiber perform, three kind of TaC content (low, medium, high) preforms were obtained. 3D C/SiC-TaC composites were prepared after densification using CVI SiC. The resultant and microstructure were studied using XRD and SEM after oxygen-acetylene flame test. The results showed that this joint method could prepare C/SiC-TaC composites, the high content TaC fillers were oxided into TaC and Ta₂O₅ which were a solid and liquid mixture, this mixture could effectively cover the ablation surface and promote anti-ablation poperty.