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Preparation method of high-temperature wave-transparent silicon nitride radome
The invention relates to a preparation method of a high-temperature wave-transparent silicon nitride radome. A framework structure is a prefabricated body formed by weaving silicon nitride fibers, a cover body is made of a silicon nitride fiber reinforced silicon nitride ceramic matrix composite material, a silicon nitride whisker reinforced silicon nitride coating is prepared on the surface, andthe radome has excellent strength and toughness and good high-temperature wave-transparent performance and machinability. According to the radome densification process, a CVI process and a PIP processare combined, and the content of silicon nitride matrixes prepared by different processes is reasonably regulated and controlled, so that composite materials with different densities, microstructuresand performances can be obtained, and different use requirements are met. The radome has two structural forms. The integrated structure is complete, and the mechanical property and broadband wave-transparent property of the radome are more excellent. A silicon nitride ceramic nose cone is added to the split structure, so that the radome has higher ablation resistance when serving in a severe environment.
本发明涉及一种高温透波氮化硅天线罩的制备方法，骨架结构为氮化硅纤维编织而成的预制体，罩体材料为氮化硅纤维增强氮化硅陶瓷基复合材料，表面制备有氮化硅晶须增强氮化硅涂层，兼具优异的强韧性与良好的高温透波性能和机械加工性。该天线罩致密化过程采用CVI工艺和PIP工艺相结合，通过合理调控不同工艺所制氮化硅基体的含量，可以获得具有不同密度、微结构和性能的复合材料，满足不同使用要求。该天线罩具有两种结构形式，其中一体式结构完整，天线罩力学性能和宽频透波性能更优异；分体式结构加入氮化硅陶瓷头锥，可使天线罩在恶劣环境中服役时具有更高的抗烧蚀性能。
Preparation method of high-temperature wave-transparent silicon nitride radome
The invention relates to a preparation method of a high-temperature wave-transparent silicon nitride radome. A framework structure is a prefabricated body formed by weaving silicon nitride fibers, a cover body is made of a silicon nitride fiber reinforced silicon nitride ceramic matrix composite material, a silicon nitride whisker reinforced silicon nitride coating is prepared on the surface, andthe radome has excellent strength and toughness and good high-temperature wave-transparent performance and machinability. According to the radome densification process, a CVI process and a PIP processare combined, and the content of silicon nitride matrixes prepared by different processes is reasonably regulated and controlled, so that composite materials with different densities, microstructuresand performances can be obtained, and different use requirements are met. The radome has two structural forms. The integrated structure is complete, and the mechanical property and broadband wave-transparent property of the radome are more excellent. A silicon nitride ceramic nose cone is added to the split structure, so that the radome has higher ablation resistance when serving in a severe environment.
本发明涉及一种高温透波氮化硅天线罩的制备方法，骨架结构为氮化硅纤维编织而成的预制体，罩体材料为氮化硅纤维增强氮化硅陶瓷基复合材料，表面制备有氮化硅晶须增强氮化硅涂层，兼具优异的强韧性与良好的高温透波性能和机械加工性。该天线罩致密化过程采用CVI工艺和PIP工艺相结合，通过合理调控不同工艺所制氮化硅基体的含量，可以获得具有不同密度、微结构和性能的复合材料，满足不同使用要求。该天线罩具有两种结构形式，其中一体式结构完整，天线罩力学性能和宽频透波性能更优异；分体式结构加入氮化硅陶瓷头锥，可使天线罩在恶劣环境中服役时具有更高的抗烧蚀性能。
Preparation method of high-temperature wave-transparent silicon nitride radome
一种高温透波氮化硅天线罩的制备方法
CHENG LAIFEI (author) / YE FANG (author) / ZHANG LITONG (author) / ZHOU JIE (author) / FU ZHIQIANG (author) / CUI XUEFENG (author)
2020-06-16
Patent
Electronic Resource
Chinese
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