某低轨星载天线热控防护复合膜层的制备及性能  

Preparation and properties of protective composite coating for thermal control of low-earth orbit satelliteborne antenna

作　　者：王亚锋 胡江华[1] 王济洲 WANG YA-feng;HU Jiang-hua;WANG Ji-zhou(No.38 Research Institute,China Electronic Technology Group Corporation,Hefei 230031,China)

机构地区：[1]中国电子科技集团有限公司第三十八研究所,安徽合肥230031 [2]无锡泓瑞航天科技有限公司,江苏无锡214000

出　　处：《电镀与涂饰》2018年第13期585-588,共4页Electroplating & Finishing

摘　　要：针对工作在低地球轨道的某星载天线(基材为3A21铝合金)的结构特点和热控防护要求,采用离子束辅助真空蒸发镀膜技术依次在其上沉积了作为热控防护膜层的二氧化硅和氧化铝,以及作为保护膜的氧化铟锡。考察了膜厚以及基底表面粗糙度对膜层性能的影响,评估了膜层的附着力、抗热震性能、耐原子氧性能和耐紫外辐照性能,以及天线的电信性能。所得热控防护复合膜层能满足实际应用要求。Based on the structural characteristics and thermal control requirement of a satellite-borne antenna,whose substrate is 3A21 aluminum alloy,for low-earth orbit,a thermal control coating comprising silicon dioxide and aluminum oxide and a protective coating of indium tin oxide were successively deposited on its surface by ion-assisted vacuum evaporation coating technology.The correlation of properties of the coating system with its thickness and surface roughness of substrate was studied.The adhesion,thermal shock resistance,atomic oxygen resistance,and ultraviolet radiation resistance of the coating system,as well as the telecommunication performance of the antenna were evaluated.The protective composite coating system meets the thermal control requirement of space applications.

关 键 词：星载天线 铝合金 真空蒸发 热控防护涂层 太阳吸收比 半球发射率 厚度 

分 类 号：TB34[一般工业技术—材料科学与工程] TN23[电子电信—物理电子学]