耐烧蚀/耐高温/透波/承载一体化石英纤维布/玻璃粉/(PSN/BZ)复合材料制备与性能  

Preparation and Performance of Ablation Resistance/High Temperature Resistance/Wave-transmitting/Bearing Integrated Quartz Fiber Cloth/Glass Powder/(PSN/BZ) Composite Material

作　　者：许亚丰[1,2] 秦岩 孙洪鑫[2] XU Ya-feng;QIN Yan;SUN Hong-xin(Key Laboratory of Special Functional Materials of Ministry of Education,Wuhan University of Technology,Wuhan 430070,China;Beijing FRP Research and Design Institute Co Ltd,Beijing 102101,China)

机构地区：[1]武汉理工大学特种功能材料教育部重点实验室,武汉430070 [2]北京玻璃钢研究设计院有限公司,北京102101

出　　处：《武汉理工大学学报》2022年第4期1-5,共5页Journal of Wuhan University of Technology

基　　金：特种纤维复合材料国家重点实验室应用基础性研究项目(YJ2019SYS08)。

摘　　要：采用石英纤维布作为增强体,苯并噁嗪(BZ)改性乙烯基聚硅氮烷(PSN)作为基体,添加低熔点玻璃粉,通过热压罐工艺制备了石英纤维布/玻璃粉/(PSN/BZ)复合材料。通过氧-乙炔烧蚀试验测得线烧蚀率为0.036 3mm/s,通过不同温度下的微观结构和元素表征,表明1 000℃时发生明显的可瓷化转变,生成Si-O-C陶瓷物质,并且随着温度逐渐升高,材料致密性也随之增大。通过热稳定性、玻璃化转变温度(T_(g))、高机械性能和1~18GHz频率下的介电性能表征,结果显示该材料氮气和空气下的5%热失重温度(T_(d5))分别高达498.2℃和477.7℃,玻璃化转变温度(T_(g))大于600℃,400℃下弯曲强度和弯曲模量分别为45.2 MPa和8.52GPa,介电常数在3.20~3.29之间,折损率在(2.9~4.3)×10^(-3)之间。Quartz fiber cloth is used as the reinforcement,benzoxazine(BZ)modified vinyl polysilazane(PSN)is used as the matrix,and low-melting glass powder is added.Quartz fiber cloth/glass powder/(PSN/BZ)composite material was prepared by the autoclave process.The linear ablation rate measured by the oxygen-acetylene ablation test was 0.036 3mm/s.Through the microstructure and element characterization at different temperatures,it is shown that the obvious porcelain transformation occurs at 1 000℃,and the Si-O-C ceramic material is formed.And as the temperature gradually increases,the density of the material also increases.Characterized by thermal stability,glass transition temperature(T_(g)),high mechanical properties and dielectric properties at 1~18GHz frequency.The results show that the 5%thermal weight loss temperature(T_(d5))of the material under nitrogen and air is as high as 498.2℃and 477.7℃,and the glass transition temperature(T_(g))is greater than 600℃.The flexural strength and flexural modulus at 400℃ are 45.2MPa and 8.52GPa,respectively,the dielectric constant is between 3.20 and 3.29,and the breakage rate is between(2.9~4.3)×10^(-3).

关 键 词：乙烯基聚硅氮烷 苯并噁嗪 可瓷化 耐烧蚀 耐高温 透波 承载 

分 类 号：TQ430[化学工程]