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Performance of silvered Teflon (trademark) thermal control blankets on spacecraft

作者:科技文献资料网 时间:2018-10-19 21:15:44  浏览:9798   来源:科技文献资料网
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[唯一标识符]:CDSITC.AEROSPACE.N94-31014
[文献来源]:美国航空航天数据库(aerospace)
[资源原始索取号]:N1994-31014; Reference AN: N94-31014
[标题]:Performance of silvered Teflon (trademark) thermal control blankets on spacecraft
[作者]:PIPPIN GARY; STUCKEY WAYNE; HEMMINGER CAROL
[书名]:IN: NASA. Marshall Space Flight Center, LDEF Materials Results for Spacecraft Applications p 21-30 (SEE N1994-31012 09-12)
[来源]:In-NASA. Marshall-Space-Flight-Center-LDEF-Materials-Results-for-Spacecraft-Applications-p-21-30-(SEE-N1994-31012-09-12)
[文摘]:Silverized Teflon (Ag/FEP) is a widely used passive thermal control material for space applications. The material has a very low alpha/e ratio (less than 0.1) for low operating temperatures and is fabricated with various FEP thicknesses (as the Teflon thickness increases, the emittance increases). It is low outgassing and, because of its flexibility, can be applied around complex, curved shapes. Ag/FEP has achieved multiyear lifetimes under a variety of exposure conditions. This has been demonstrated by the Long Duration Exposure Facility (LDEF), Solar Max, Spacecraft Charging at High Altitudes (SCATHA), and other flight experiments. Ag/FEP material has been held in place on spacecraft by a variety of methods: mechanical clamping, direct adhesive bonding of tapes and sheets, and by Velcro(TM) tape adhesively bonded to back surfaces. On LDEF, for example, 5-mil blankets held by Velcro(TM) and clamping were used for thermal control over 3- by 4-ft areas on each of 17 trays. Adhesively bonded 2- and 5-mil sheets were used on other LDEF experiments, both for thermal control and as tape to hold other thermal control blankets in place. Performance data over extended time periods are available from a number of flights. The observed effects on optical properties, mechanical properties, and surface chemistry will be summarized in this paper. This leads to a discussion of performance life estimates and other design lessons for Ag/FEP thermal control material. (Author (revised))
[关键词]:EARTH ORBITAL ENVIRONMENTS; EMITTANCE ; EXPOSURE ; LONG DURATION EXPOSURE FACILITY; LOW TEMPERATURE; OPERATING TEMPERATURE; TEFLON TRADEMARK; TEMPERATURE CONTROL; ADHESIVE BONDING; ADHESIVES ; CLAMPS ; OUTGASSING ; SCATHA SATELLITE; SURFACE REACTIONS; TRA
[出版年份]:1993
[专业领域]:NONMETALLIC MATERIALS
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[唯一标识符]:CDSTIC.ISTP.48939
[文献来源]:科学技术会议录索引(ISTP)
[文献类型]:科技会议
[标题]:DEVELOPMENTAL STATUS IS A CRITICAL FACTOR IN THE SELECTION OF EXCISED RECALCITRANT AXES AS EXPLANTS FOR CRYOPRESERVATION - A STUDY ON TRICHILIA-DREGEANA SOND
[作者]:M Goveia;JI Kioko;P Berjak
[出版单位]:C A B I PUBLISHINGWALLINGFORD
[ISSN_ISBN]:0960-2585
[会议名称]:4th International Workshop on Desiccation Tolerance and Sensitivity of Seeds and Vegetative Plant Tissues,BLOOWATERBAAI, SOUTH AFRICA,August 2003
[来源]:PHYSIOLOGIA PLANTARUM;SEED SCIENCE RESEARCH,pp 241-248
[地址]:JI Kioko,UNIV_KWAZULU_NATAL, SCH BIOL & CONSERVAT SCI, ZA-4041 DURBAN, SOUTH AFRICA
[专业领域]:PLANT SCIENCES
[文献类型]:科技报告
[标题]:Comparison of the Microbial Community Composition at Yucca Mountain and Laboratory Test Nuclear Repository Environments.
[作者]:J. Horn; C. Carrillo; V. Dias;
[机构]:Lawrence Livermore National Lab., CA.*Department of Energy, Washington, DC.
[关键词]:yucca mountain,radioactive waste disposal,biodiversity,high level radioactive wastes, microorganisms, dna, thermophiles,
[出版年份]:2004
[报告号]:UCRL-JC-150693
[报告时间]:9 Oct 2002,
[页码]:18p
[馆藏索取号]:DE200315004036
[总页数]:0



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