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Volume 36 Issue 4
Jul 2022
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Chinese Journal of High Pressure Physics  > 2022  >  36(4): 043101.
YANG Jing, ZHAO Hao, DING Zhanhui, CHEN Kefu, XU Baoyin, LI Miao, DU Xiaobo, LI Yongfeng, YAO Bin. High Pressure Preparation and Characterization of High Density ZrB2-ZrC Ultra-High Temperature Ceramic[J]. Chinese Journal of High Pressure Physics, 2022, 36(4): 043101. doi: 10.11858/gywlxb.20220587
Citation: YANG Jing, ZHAO Hao, DING Zhanhui, CHEN Kefu, XU Baoyin, LI Miao, DU Xiaobo, LI Yongfeng, YAO Bin. High Pressure Preparation and Characterization of High Density ZrB2-ZrC Ultra-High Temperature Ceramic[J]. Chinese Journal of High Pressure Physics, 2022, 36(4): 043101. doi: 10.11858/gywlxb.20220587
shu

High Pressure Preparation and Characterization of High Density ZrB2-ZrC Ultra-High Temperature Ceramic

doi: 10.11858/gywlxb.20220587
  • 1.

    College of Physics, Jilin University, Changchun 130012, Jilin, China

  • 2.

    National Key Laboratory of Science and Technology on High-Strength Structural Materials, Central South University, Changsha 410083, Hunan, China

  • 3.

    College of Physics, Changchun Normal University, Changchun 130032, Jilin, China

  • Received Date: 18 May 2022
  • Rev Recd Date: 06 Jun 2022
    • Available Online: 16 Jul 2022
  • Issue Publish Date: 28 Jul 2022
    Abstract
  • Ultra-high temperature ceramics have excellent properties, such as high melting point, high thermal conductivity, and anti-oxidative ablation, and thus are important candidates for reusable heat-resistant parts of hypersonic aircraft. In this paper, high-density and ultra-high temperature ceramic ZrB2-ZrC composites were prepared by high pressure technology. By adjusting the synthesis conditions and the ratio of raw materials, the effects of synthesis pressure and sintering aid ZrC content on the thermal ablation properties of the composites were studied. The results show that the density of ZrB2-ZrC composite prepared under 3.2 GPa and 950 ℃ is above 95%, and the optimal mass ablation rate of the composite at 1600 ℃ is 17 μg/s. The optimal mass ablation rate at 2000 ℃ is 30 μg/s. Under the synthesis pressure of 2.9 GPa and temperature of 950 ℃, by changing the content of the sintering aid ZrC, the thermal ablation performance of the composites could be affected. When the molar ratio of ZrB2 to ZrC is 8∶1, the mass ablation rate of the ZrB2-ZrC composites after ablation at 1600 ℃ has the lowest value (35 μg/s).

     

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