Mechanical and ablation properties of 2D Cf-ZrB2-SiC composites prepared by slurry brushing-hot pressing method
Continuous carbon fiber reinforced ZrB2-SiC composites have attracted much attention in the field of thermal protective structural materials for space vehicles due to their excellent oxidation and ablation resistance.In this paper,2D Cf-ZrB2-SiC composites were prepared by the slurry brushing-hot pressing method,the feasibility of using micron-sized powder slurry to prepare 2D Cf-ZrB2-SiC composites was explored,the effects of sintering temperatures on the microstructure and mechanical properties of the materials were investigated,and the ablation resistance of the materials was tested.The results show that the 2D Cf-ZrB2-SiC composite prepared by micron-sized powder slurry brushing-hot pressing method has the highest density and flexural strength after sintering at 2 000℃,with an open porosity of 8.01%and a flexural strength of 191.3 MPa;it appears good ablation resistance,the surface response temperature reaches 2 600℃,and the linear ablation rate is 3.51 μm/s after plasma flame ablation for 300 s.
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