Science and Technology on Thermostructural Composite Materials Laboratory, Center，
Northwestern Polytechnical University
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DOI:
10.7502/j.issn.1674-3962.2015.10.03
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Abstract:
The development of hypersonic vehicles requires ultrahigh temperature ceramic matrix composites (UHTCMCs) for their thermal protection system. The effective way to fabricate the UHTCMCs isto enhance the ablation resistance of coatings and matrix of C/SiC composites. In this paper, we briefly introduced the fabrication of C/SiC composites and their ablation behaviors. The modification of the coatings and matrix of C/SiC composites by adding single- or multi- UHTC components was reviewed, and their ablation behaviors as well. The results indicated that the refractory borides or carbides, such as ZrB2、ZrC、TaC and HfC were good candidates to enhance the high temperature resistance and the ablation resistance. Base on the requirements of multiple ablation resistance for future reentry vehicles, the modification of UHTCMCs to meet these requirements was also reported. The preliminary results of multiple ablation under oxyacetylenetorch flame was given.