Abstract
In order to optimize the infiltration material ratio for preparing C/C-(Zr, V, Si)C composites with the best ablative and mechanical properties, the structure and properties of composites prepared with different infiltration materials were studied. Results showed that V formed a low-melting alloy melting with Zr and Si when the (Zr/V)/Si atomic ratio in the infiltrating material is (2/1)/6. The ceramics in the sample (Z2V1S6) prepared with this infiltration material were finer and more evenly distributed. Z2V1S6 had the best ablation resistance owing to VC-induced the formation of a dense oxide layer with excellent oxidation and corrosion resistance on the sample surface. The oxide layer reduced the oxidation damage in the internal composites and ensured the original mechanical properties of the sample. The flexural strength and strength retention of the sample (Z4S6) prepared with Zr/Si atomic ratio of 4/6 were lower than that of Z2V1S6 after ablation.
Published Version
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