热/自然交变环境下玻璃纤维增强SiO_(2)气凝胶复合材料模拟使役工况试验研究  

Experimental Study on Simulated Service Conditions of Glass Fiber-reinforced SiO_(2) Aerogel Composites in Thermal/Natural Alternating Environment

作　　者：彭星 孙彩云 丛大龙[1] 陈汉宾[1] 吴永鹏 周富 唐晶晶 董玲抒 高诗情 PENG Xing;SUN Cai-yun;CONG Da-long;CHEN Han-bin;WU Yong-peng;ZHOU Fu;TANG Jing-jing;DONG Ling-shu;GAO Shi-qing(Southwest Institute of Technology and Engineering,Chongqing 400039,China)

机构地区：[1]西南技术工程研究所,重庆400039

出　　处：《装备环境工程》2023年第3期55-61,共7页Equipment Environmental Engineering

摘　　要：目的 研究装备动力舱在热/自然交变环境下玻璃纤维增强SiO_(2)气凝胶复合材料性能随模拟使役工况试验时间的退化规律,提升装备动力舱热/自然交变环境效应控制水平。方法 以玻璃纤维增强SiO_(2)气凝胶复合材料为研究对象,以湿热、盐雾和高温试验为热/自然交变环境试验谱,以振动试验为加速因子,开展5个周期的实验室模拟使役工况加速试验,对比分析样件初始状态和每一个周期试验后的性能。结果 经模拟使役工况试验后,玻璃纤维增强SiO_(2)气凝胶复合材料的颜色由白色逐渐变成黄色,SiO_(2)气凝胶含量逐渐减少,纤维元素组成变化不明显,导热系数升高,隔热性能下降,且均在4周期模拟使役工况试验后出现明显变化。结论 玻璃纤维增强SiO_(2)气凝胶复合材料经5个周期的模拟使役工况试验后,其常温导热系数仅为0.026 4 W/(m·K),热面温度为200℃时,冷面平均温度仅为68.5℃,热/自然交变温差为43.5℃,具有良好的环境适应性。The work aims to study the degradation law of glass fiber-reinforced aerogel composites in the thermal/natural alternating environment of the equipment nacelle with the experimental time of the simulated service conditions,and to improve the control level of the thermal/natural alternating environmental effect of the equipment nacelle.With fiber-reinforced aerogel composites as the research object,humid heat,salt spray and high temperature tests as the thermal/natural alternating environment test spectrum,and vibration test as the acceleration factor,the five-cycle laboratory simulation of the service working condition acceleration experiment was carried out, and the initial state of the sample and the performance after each cycle of test were compared and analyzed. After the simulated service condition test, the color of the glass fiber-reinforced SiO_(2) aerogel composites gradually changed from white to yellow. The content of SiO_(2) aerogel gradually decreased. The composition of the fiber elements did not change significantly. The thermal conductivity increased. The thermal insulation performance decreased, and all of them changed significantly after the four-cycle simulation of the service condition test. After five cycles of simulated service test, the thermal conductivity of glass fiber-reinforced SiO_(2) aerogel composites is only 0.026 4 W/(m·K), the average temperature of the cold surface is only 68.5 ℃ when the hot surface temperature is 200 ℃, and the thermal/natural alternating temperature difference is 43.5 ℃, which has good environmental adaptability.

关 键 词：复合材料 环境效应 使役工况 导热系数 隔热性能 

分 类 号：TJ85[兵器科学与技术—武器系统与运用工程]