空间材料出气筛选装置的研制与试验

DEVELOPMENT AND TEST OF THE DEVICE FOR SCREENING SPACE MATERIALS BY OUTGASSING

叙述了总质量损失(TML)、收集到的可凝挥发物(CVCM)和水蒸汽回吸量(WVR),它们是空间材料出气的三项密不可分的指标,提供了材料在空间热真空环境中的耐受性和对航天器敏感表面形成污染的基本信息。ASTM(美国材料试验协会)E595-90标准适合批量测试,数据可靠,测试速度快,成本低,是空间材料出气筛选的唯一标准,为世界各国所公认。我们制定了相应的部标准QJ1558-88,并研制了与之相应的Micro-VCM 测试装置,全面达到了ASTME595-90标准的要求,其中控温精度、天平灵敏度和交叉污染控制方面优于上述标准。

It is described that total mass loss(TML)、collected vo-latile condensable materials(CVCM)and water vapor regained(WVR)are three closely related indexes which reflect outgassing state of spacematerials and provide basic infomation about the tolerance of the ma-terials in space thermo-vacuum environment and the contamination onthe sensitive surface of the spacecraft caused by outgassing.ASTM(TheAmerican Society for Testing and Materials)E595-90 standard,whichis adapted to batch testing,high data reliability,quick testing rateand low cost,becomes the sole standard for screening space materialsby outgassing,and is adopted by all space organizations all over theworld.In view of this,we have formulated an equivalent standard ofthe Ministry of Space Industry QJ 1558-88,and have developed the cor-responding testing deviee,Micro-VCM,which has met allof the require-ments of the ASTM E595-90 standard and and is even better in someaspects,such as temperature control accuracy,balance sensitivity andcontrol of cross-contamination.