Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ultrahigh-temperature ceramic-based composite material and preparation method thereof
The invention relates to an ultrahigh-temperature ceramic-based composite material and preparation method thereof. The preparation method comprises the following steps: introducing B4C and an organicprecursor of C into a C/C composite material preform, and curing and cracking to obtain a C/B4C-C preform; then adopting a reaction melt infiltration method, reacting a silicon-hafnium alloy melt anda silicon-zirconium alloy melt with B4C-C to generate an HfC-ZrC-HfB2-ZrB2-SiC multi-component ablation-resistant matrix in-situ, wherein HfC and ZrC form a (Hf,Zr)C solid solution, HfB2 and ZrB2 forma (Hf,Zr)B2 solid solution, and the oxidation ablation resistance of the composite material is effectively improved. The prepared C/(Hf,Zr)C(Hf,Zr)B2-SiC composite material is high in component volume content and has good mechanical properties. According to the method, a vacuum-pressure impregnation method is adopted, the method is suitable for preparing (Hf,Zr)C(Hf,Zr)B2-SiC modified C/C and C/SiC composite material, and the ablation resistance of the composite material in an extreme environment is effectively improved.
本发明涉及一种超高温陶瓷基复合材料及制备方法，在C/C复合材料预制体中引入B4C，以及C的有机前驱体，固化裂解后得到C/B4C‑C预制体。之后采用反应熔体浸渗法，利用硅铪合金和硅锆合金熔体与B4C‑C反应，原位生成HfC‑ZrC‑HfB2‑ZrB2‑SiC多组分抗烧蚀基体，其中HfC与ZrC组成(Hf,Zr)C固溶体，HfB2与ZrB2组成(Hf,Zr)B2固溶体，有效提高了复合材料的抗氧化烧蚀性能。制备的C/(Hf,Zr)C‑(Hf,Zr)B2‑SiC复合材料超高温陶瓷组分体积含量高，具有良好的力学性能。本方法采用真空‑压力浸渍方法，适用于(Hf,Zr)C‑(Hf,Zr)B2‑SiC改性C/C和C/SiC复合材料的制备，有效提高复合材料在极端环境下的抗烧蚀能力。
Ultrahigh-temperature ceramic-based composite material and preparation method thereof
The invention relates to an ultrahigh-temperature ceramic-based composite material and preparation method thereof. The preparation method comprises the following steps: introducing B4C and an organicprecursor of C into a C/C composite material preform, and curing and cracking to obtain a C/B4C-C preform; then adopting a reaction melt infiltration method, reacting a silicon-hafnium alloy melt anda silicon-zirconium alloy melt with B4C-C to generate an HfC-ZrC-HfB2-ZrB2-SiC multi-component ablation-resistant matrix in-situ, wherein HfC and ZrC form a (Hf,Zr)C solid solution, HfB2 and ZrB2 forma (Hf,Zr)B2 solid solution, and the oxidation ablation resistance of the composite material is effectively improved. The prepared C/(Hf,Zr)C(Hf,Zr)B2-SiC composite material is high in component volume content and has good mechanical properties. According to the method, a vacuum-pressure impregnation method is adopted, the method is suitable for preparing (Hf,Zr)C(Hf,Zr)B2-SiC modified C/C and C/SiC composite material, and the ablation resistance of the composite material in an extreme environment is effectively improved.
本发明涉及一种超高温陶瓷基复合材料及制备方法，在C/C复合材料预制体中引入B4C，以及C的有机前驱体，固化裂解后得到C/B4C‑C预制体。之后采用反应熔体浸渗法，利用硅铪合金和硅锆合金熔体与B4C‑C反应，原位生成HfC‑ZrC‑HfB2‑ZrB2‑SiC多组分抗烧蚀基体，其中HfC与ZrC组成(Hf,Zr)C固溶体，HfB2与ZrB2组成(Hf,Zr)B2固溶体，有效提高了复合材料的抗氧化烧蚀性能。制备的C/(Hf,Zr)C‑(Hf,Zr)B2‑SiC复合材料超高温陶瓷组分体积含量高，具有良好的力学性能。本方法采用真空‑压力浸渍方法，适用于(Hf,Zr)C‑(Hf,Zr)B2‑SiC改性C/C和C/SiC复合材料的制备，有效提高复合材料在极端环境下的抗烧蚀能力。
Ultrahigh-temperature ceramic-based composite material and preparation method thereof
一种超高温陶瓷基复合材料及制备方法
FAN SHANGWU (Autor:in) / KOU SIJIE (Autor:in) / WANG LE (Autor:in) / JI BIAO (Autor:in) / LUAN CHENGHUA (Autor:in)
19.03.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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