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一种耐高温抗烧蚀Si3N4f/SiBNc/SiBN-BN透波复合材料及其制备方法
本发明公开了一种耐高温抗烧蚀Si3N4f/SiBNc/SiBN‑BN透波复合材料及其制备方法，包括以下步骤：1)将Si3N4纤维制成预制体，然后经过排胶处理，以聚硼硅氮烷作为先驱体，采用化学气相渗透工艺在Si3N4纤维表面或内部空隙沉积硅硼氮界面相和SiBN基体，得到Si3N4f/SiBNc/SiBN预制体；2)将步骤1)中所得的Si3N4f/SiBNc/SiBN预制体进行先驱体浸渍－裂解工艺过程，引入BN基体，得到Si3N4f/SiBNc/SiBN‑BN试片；3)将步骤2)的先驱体浸渍－裂解工艺重复数次，然后放进裂解炉内，抽真空，烘干，得到。
The invention discloses a high-temperature-resistant anti-ablation Si3N4f/SiBNc/SiBN-BN wave-transparent composite material and a preparation method thereof.The preparation method comprises the following steps that 1, Si3N4 fibers are prepared into a prefabricated body, then glue discharging treatment is conducted, polyborosilazane serves as a precursor, a silicon-boron-nitrogen interface phase and a SiBN matrix are deposited on the surfaces or internal gaps of the Si3N4 fibers through a chemical vapor infiltration technology, and a Si3N4f/SiBNc/SiBN prefabricated body is obtained; (2) the Si3N4f/SiBNc/SiBN prefabricated body obtained in the step (1) is subjected to a precursor dipping-cracking technological process, a BN matrix is introduced, and a Si3N4f/SiBNc/SiBN-BN test piece is obtained; and (3) repeating the precursor impregnation-cracking process in the step (2) for multiple times, then putting the precursor into a cracking furnace, vacuumizing and drying to obtain the product.
一种耐高温抗烧蚀Si3N4f/SiBNc/SiBN-BN透波复合材料及其制备方法
本发明公开了一种耐高温抗烧蚀Si3N4f/SiBNc/SiBN‑BN透波复合材料及其制备方法，包括以下步骤：1)将Si3N4纤维制成预制体，然后经过排胶处理，以聚硼硅氮烷作为先驱体，采用化学气相渗透工艺在Si3N4纤维表面或内部空隙沉积硅硼氮界面相和SiBN基体，得到Si3N4f/SiBNc/SiBN预制体；2)将步骤1)中所得的Si3N4f/SiBNc/SiBN预制体进行先驱体浸渍－裂解工艺过程，引入BN基体，得到Si3N4f/SiBNc/SiBN‑BN试片；3)将步骤2)的先驱体浸渍－裂解工艺重复数次，然后放进裂解炉内，抽真空，烘干，得到。
The invention discloses a high-temperature-resistant anti-ablation Si3N4f/SiBNc/SiBN-BN wave-transparent composite material and a preparation method thereof.The preparation method comprises the following steps that 1, Si3N4 fibers are prepared into a prefabricated body, then glue discharging treatment is conducted, polyborosilazane serves as a precursor, a silicon-boron-nitrogen interface phase and a SiBN matrix are deposited on the surfaces or internal gaps of the Si3N4 fibers through a chemical vapor infiltration technology, and a Si3N4f/SiBNc/SiBN prefabricated body is obtained; (2) the Si3N4f/SiBNc/SiBN prefabricated body obtained in the step (1) is subjected to a precursor dipping-cracking technological process, a BN matrix is introduced, and a Si3N4f/SiBNc/SiBN-BN test piece is obtained; and (3) repeating the precursor impregnation-cracking process in the step (2) for multiple times, then putting the precursor into a cracking furnace, vacuumizing and drying to obtain the product.
一种耐高温抗烧蚀Si3N4f/SiBNc/SiBN-BN透波复合材料及其制备方法
2023-07-25
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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