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A platform for research: civil engineering, architecture and urbanism
High-temperature-resistant stealth composite material and preparation method thereof
The invention relates to a high-temperature-resistant stealth composite material and a preparation method thereof. The preparation method comprises the following steps: mixing a fiber wave-absorbing agent and chopped quartz fibers according to different proportions, and forming electromagnetic films with different dielectric constants through a wet papermaking process; the prepared electromagnetic film, quartz fiber cloth and a quartz net tire are arranged in a laminated mode, needling is conducted, and a quartz prefabricated body containing the electromagnetic film is obtained; pretreating the quartz preform, and removing the impregnating compound in the quartz preform; putting the quartz preform without the impregnating compound into a forming tool, vacuumizing for 1-2 hours, adding the concentrated silica sol into the tool, continuously vacuumizing for 1-2 hours, then applying 2-4 MPa external pressure into the tool, maintaining the pressure for 6-36 hours, and heating and curing the silica sol; and drying and sintering the cured quartz preform to obtain the high-temperature-resistant stealth composite material. The high-temperature-resistant stealth composite material prepared by the preparation method disclosed by the invention has excellent high-temperature mechanical properties and can realize structural stealth integration.
本发明涉及一种耐高温隐身复合材料及其制备方法。该制备方法包括：将纤维吸波剂与短切石英纤维按照不同的比例进行混杂，通过湿法抄造工艺形成不同介电常数的电磁膜；将制备的电磁膜与石英纤维布、石英网胎按进行叠层排布，并进行针刺，得到含有电磁膜的石英预制体；对石英预制体进行预处理，去除石英预制体中的浸润剂；将去除浸润剂的石英预制体放入成型工装，抽真空1～2h，将浓缩的硅溶胶加入工装，继续抽真空1～2h，然后在工装内加2～4MPa的外压，保压6～36h后，加热固化硅溶胶；将固化后的石英预制体进行干燥和烧结，得到耐高温隐身复合材料。本发明制备的耐高温隐身复合材料，在具有优异的高温力学性能的同时，能够实现结构隐身一体化。
High-temperature-resistant stealth composite material and preparation method thereof
The invention relates to a high-temperature-resistant stealth composite material and a preparation method thereof. The preparation method comprises the following steps: mixing a fiber wave-absorbing agent and chopped quartz fibers according to different proportions, and forming electromagnetic films with different dielectric constants through a wet papermaking process; the prepared electromagnetic film, quartz fiber cloth and a quartz net tire are arranged in a laminated mode, needling is conducted, and a quartz prefabricated body containing the electromagnetic film is obtained; pretreating the quartz preform, and removing the impregnating compound in the quartz preform; putting the quartz preform without the impregnating compound into a forming tool, vacuumizing for 1-2 hours, adding the concentrated silica sol into the tool, continuously vacuumizing for 1-2 hours, then applying 2-4 MPa external pressure into the tool, maintaining the pressure for 6-36 hours, and heating and curing the silica sol; and drying and sintering the cured quartz preform to obtain the high-temperature-resistant stealth composite material. The high-temperature-resistant stealth composite material prepared by the preparation method disclosed by the invention has excellent high-temperature mechanical properties and can realize structural stealth integration.
本发明涉及一种耐高温隐身复合材料及其制备方法。该制备方法包括：将纤维吸波剂与短切石英纤维按照不同的比例进行混杂，通过湿法抄造工艺形成不同介电常数的电磁膜；将制备的电磁膜与石英纤维布、石英网胎按进行叠层排布，并进行针刺，得到含有电磁膜的石英预制体；对石英预制体进行预处理，去除石英预制体中的浸润剂；将去除浸润剂的石英预制体放入成型工装，抽真空1～2h，将浓缩的硅溶胶加入工装，继续抽真空1～2h，然后在工装内加2～4MPa的外压，保压6～36h后，加热固化硅溶胶；将固化后的石英预制体进行干燥和烧结，得到耐高温隐身复合材料。本发明制备的耐高温隐身复合材料，在具有优异的高温力学性能的同时，能够实现结构隐身一体化。
High-temperature-resistant stealth composite material and preparation method thereof
一种耐高温隐身复合材料及其制备方法
GAO WENBO (author) / LIU DAWEI (author) / CUI FENGDAN (author) / ZHANG JIAN (author) / ZHAO HONGJIE (author)
2024-03-29
Patent
Electronic Resource
Chinese
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