Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Antioxidant fiber-reinforced silicon-boron-nitrogen composite material and preparation method and application thereof
The invention relates to the technical field of composite materials, in particular to an antioxidant fiber-reinforced silicon-boron-nitrogen composite material and a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing a prefabricated body from silicon nitride fibers; (2) impregnating the preform obtained in the step (1) with a precursor, then carrying out a cross-linking curing reaction, and finally cracking; (3) repeating the step (2) for at least three times to obtain a green body; and (4) carrying out at least one silica sol dipping and gelation drying process on the green body obtained in the step (3), and further carrying out heat treatment to obtain the antioxidant fiber-reinforced silicon-boron-nitrogen composite material. The density of the prepared silicon-boron-nitrogen composite material is 1.79-1.95 g/cm < 3 >, the weight gain rate is 2.6-7.9% after oxidation treatment is carried out for 1 h in the air atmosphere at the temperature of 1200 DEG C, and the silicon-boron-nitrogen composite material has good compactness and high temperature resistance and oxidation resistance.
本发明涉及复合材料技术领域，尤其涉及一种抗氧化的纤维增强硅硼氮复合材料及其制备方法和应用；所述制备方法包括如下步骤：(1)采用氮化硅纤维制备成预制体；(2)将步骤(1)得到的预制体进行浸渍前驱体，然后进行交联固化反应，最后进行裂解；(3)重复步骤(2)至少3次，得到坯体；(4)将步骤(3)得到的坯体进行至少1次的浸渍硅溶胶与凝胶化干燥的过程后，进一步进行热处理得到所述抗氧化的纤维增强硅硼氮复合材料；本发明制备得到的硅硼氮复合材料密度为1.79～1.95g/cm3、1200℃空气气氛氧化处理1h后增重率2.6％～7.9％，具有良好的致密性和耐高温抗氧化性能。
Antioxidant fiber-reinforced silicon-boron-nitrogen composite material and preparation method and application thereof
The invention relates to the technical field of composite materials, in particular to an antioxidant fiber-reinforced silicon-boron-nitrogen composite material and a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing a prefabricated body from silicon nitride fibers; (2) impregnating the preform obtained in the step (1) with a precursor, then carrying out a cross-linking curing reaction, and finally cracking; (3) repeating the step (2) for at least three times to obtain a green body; and (4) carrying out at least one silica sol dipping and gelation drying process on the green body obtained in the step (3), and further carrying out heat treatment to obtain the antioxidant fiber-reinforced silicon-boron-nitrogen composite material. The density of the prepared silicon-boron-nitrogen composite material is 1.79-1.95 g/cm < 3 >, the weight gain rate is 2.6-7.9% after oxidation treatment is carried out for 1 h in the air atmosphere at the temperature of 1200 DEG C, and the silicon-boron-nitrogen composite material has good compactness and high temperature resistance and oxidation resistance.
本发明涉及复合材料技术领域，尤其涉及一种抗氧化的纤维增强硅硼氮复合材料及其制备方法和应用；所述制备方法包括如下步骤：(1)采用氮化硅纤维制备成预制体；(2)将步骤(1)得到的预制体进行浸渍前驱体，然后进行交联固化反应，最后进行裂解；(3)重复步骤(2)至少3次，得到坯体；(4)将步骤(3)得到的坯体进行至少1次的浸渍硅溶胶与凝胶化干燥的过程后，进一步进行热处理得到所述抗氧化的纤维增强硅硼氮复合材料；本发明制备得到的硅硼氮复合材料密度为1.79～1.95g/cm3、1200℃空气气氛氧化处理1h后增重率2.6％～7.9％，具有良好的致密性和耐高温抗氧化性能。
Antioxidant fiber-reinforced silicon-boron-nitrogen composite material and preparation method and application thereof
一种抗氧化的纤维增强硅硼氮复合材料及其制备方法和应用
ZHANG BINGQING (Autor:in) / HAN YAO (Autor:in) / MIAO ZHENJIANG (Autor:in) / ZHANG JIAN (Autor:in) / LYU YI (Autor:in) / ZHANG HAO (Autor:in) / ZHAO YINGMIN (Autor:in)
24.12.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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