Preparation method of high-temperature-resistant antioxidant BNf/SiBN wave-transparent composite material and product thereof

• Main Authors: XIA LONG, XING LIZHE, SHEN HUICHENG, SHAO CHANGTAO, ZHANG YANXIN, WANG YI, YONEZAWA IZUMI, WANG YUANSHUAI, YANG BIN, WANG XINYU, QI KAIYU
• Format: Patent
• Language: Chinese; English
• Published: 25.06.2024
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention discloses a preparation method of a high-temperature-resistant antioxidant BNf/SiBN wave-transparent composite material and a product thereof, and belongs to the technical field of preparation of high-temperature wave-transparent composite materials. The preparation method comprises the following steps: carrying out degumming treatment on a BN prefabricated body to serve as a reinforcement body, taking polyborosilazane as a precursor, and obtaining a BNf/SiBN prefabricated body by adopting a dipping-cracking process; and repeating a dipping-cracking process on the BNf/SiBN preform for multiple times, then putting the BNf/SiBN preform into a cracking furnace, vacuumizing and drying to obtain the high-temperature-resistant antioxidant BNf/SiBN wave-transparent composite material. The method is safe in process, low in preparation temperature and small in fiber damage and has the unique near-net forming advantage. 本发明公开了一种耐高温抗氧化BNf/SiBN透波复合材料的制备方法及其产品，属于高温透波复合材料制备技术领域。本发明将BN预制体进行排胶处理后作为增强体，以聚硅硼氮烷为先驱