Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of wide-temperature-range self-healing modified ceramic-based composite material
The invention provides a preparation method of a wide-temperature-range self-healing modified ceramic-based composite material, which specifically comprises the following steps: adding a pore-forming agent, ZrB2 powder and SiC fibers into high-carbon-residue resin to prepare a prepreg, sequentially carrying out curing molding, carbonization, volatilization and complete pyrolysis of gaseous small molecular substances in a matrix to obtain a SiC fiber/C-ZrB2 porous body with C and ZrB2 as a skeleton structure, and carrying out high-temperature-range self-healing modification on the SiC fiber/C-ZrB2 porous body to obtain the wide-temperature-range self-healing modified ceramic-based composite material. And finally, the Si-MoSi2 alloy is melted and permeated into the porous body, so that the self-healing modified silicon carbide fiber reinforced silicon carbide ceramic-based composite material is obtained. According to the invention, a biological self-healing process is simulated, self-healing components ZrB2 and MoSi2 which can be oxidized at different temperature sections are introduced into a matrix, and cracks are sealed and filled through viscous-state substances such as B2O3 and SiO2 generated after oxidation, so that an environmental medium is prevented from diffusing in the material, self-healing response of the composite material in a wider temperature range is realized, and the self-healing performance of the composite material is improved. The service life of the material is prolonged.
本发明提供了一种宽温域自愈合改性陶瓷基复合材料制备方法，具体为：在高残炭树脂中添加造孔剂、ZrB2粉体与SiC纤维，制成预浸料，先后经历固化成型、炭化，待基体中气态小分子物质挥发，热解完全，得到以C、ZrB2为骨架结构的SiC纤维/C‑ZrB2多孔体，最后在将Si‑MoSi2合金熔融渗入多孔体，从而得到自愈合改性的碳化硅纤维增强碳化硅陶瓷基复合材料。本发明模拟生物自愈合过程，在基体中引入能够在不同温度段发生氧化的自愈合组元ZrB2及MoSi2，通过氧化后生成的B2O3、SiO2等黏流态物质封填裂纹，从而阻止环境介质在材料内部扩散，实现复合材料在更宽温域范围内发生自愈合响应，延长材料的使用寿命。
Preparation method of wide-temperature-range self-healing modified ceramic-based composite material
The invention provides a preparation method of a wide-temperature-range self-healing modified ceramic-based composite material, which specifically comprises the following steps: adding a pore-forming agent, ZrB2 powder and SiC fibers into high-carbon-residue resin to prepare a prepreg, sequentially carrying out curing molding, carbonization, volatilization and complete pyrolysis of gaseous small molecular substances in a matrix to obtain a SiC fiber/C-ZrB2 porous body with C and ZrB2 as a skeleton structure, and carrying out high-temperature-range self-healing modification on the SiC fiber/C-ZrB2 porous body to obtain the wide-temperature-range self-healing modified ceramic-based composite material. And finally, the Si-MoSi2 alloy is melted and permeated into the porous body, so that the self-healing modified silicon carbide fiber reinforced silicon carbide ceramic-based composite material is obtained. According to the invention, a biological self-healing process is simulated, self-healing components ZrB2 and MoSi2 which can be oxidized at different temperature sections are introduced into a matrix, and cracks are sealed and filled through viscous-state substances such as B2O3 and SiO2 generated after oxidation, so that an environmental medium is prevented from diffusing in the material, self-healing response of the composite material in a wider temperature range is realized, and the self-healing performance of the composite material is improved. The service life of the material is prolonged.
本发明提供了一种宽温域自愈合改性陶瓷基复合材料制备方法，具体为：在高残炭树脂中添加造孔剂、ZrB2粉体与SiC纤维，制成预浸料，先后经历固化成型、炭化，待基体中气态小分子物质挥发，热解完全，得到以C、ZrB2为骨架结构的SiC纤维/C‑ZrB2多孔体，最后在将Si‑MoSi2合金熔融渗入多孔体，从而得到自愈合改性的碳化硅纤维增强碳化硅陶瓷基复合材料。本发明模拟生物自愈合过程，在基体中引入能够在不同温度段发生氧化的自愈合组元ZrB2及MoSi2，通过氧化后生成的B2O3、SiO2等黏流态物质封填裂纹，从而阻止环境介质在材料内部扩散，实现复合材料在更宽温域范围内发生自愈合响应，延长材料的使用寿命。
Preparation method of wide-temperature-range self-healing modified ceramic-based composite material
一种宽温域自愈合改性陶瓷基复合材料的制备方法
ZHOU YIRAN (Autor:in) / JIAO JIAN (Autor:in) / YANG JINHUA (Autor:in) / LIU HU (Autor:in) / AI YINGJUN (Autor:in)
30.08.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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