航天器材料真空出气预测模型研究  

Outgassing Property Evaluation of Satellite Materials in Space Environment:A Simulation and Experimental Study

作　　者：庄建宏[1] 杨生胜[1] 郭兴[1] 颜则东[1] 余咏梅 

机构地区：[1]兰州空间技术物理研究所真空技术与物理重点实验室,兰州730000

出　　处：《真空科学与技术学报》2017年第10期946-950,共5页Chinese Journal of Vacuum Science and Technology

基　　金：国家重点研发计划(2016YFB0501303)

摘　　要：航天器材料在空间环境下的出气容易造成敏感系统的污染,并带来负面效应。对航天器出气污染的预估仿真,首先需要材料出气特性参数和模型作为输入。以RTV胶为对象,基于阶跃加热的方式对材料进行出气量原位测试,分析获得了材料出气的主要特性参数,建立了多个温度下的出气预测模型,为卫星在轨动态污染水平的仿真和预测提供输入。The outgassingbehavior and maximum contaminant levels （ MCLs） of satellite materials,particularly the volatile organic compounds like room temperature vulcanization （ RTV） silicone rubber,in space environment were empirically approximated,mathematically formulated with stepwise heating models at different temperatures, theoretically analyzed,numerically simulated and experimentally in-situ evaluatedin the lab-built,high vacuum test-platform equipped with a quartz crystal microbalance.The impact of the temperature and heating time in each heat-ing step on the average outgassing rate,average molecular mass and total mass loss （ TML） wasinvestigated.The phenomenologicalequation,predicting the temperature-dependent outgassing behavior and MCLs of various RTV sat-ellite materials,was derived by data-fitting of the simulated and measured results.The predicted and measured re-sults were found to be in good agreement with a discrepancy below 5%.

关 键 词：航天器材料 航天器表面污染 出气 总质损 预测模型 

分 类 号：TB79[一般工业技术—真空技术]