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Title: The total hemispheric emissivity of painted aluminum honeycomb at cryogenic temperatures

NASA uses high-emissivity surfaces on deep-space radiators and thermal radiation absorbers in test chambers. Aluminum honeycomb core material, when coated with a high-emissivity paint, provides a lightweight, mechanically robust, and relatively inexpensive black surface that retains its high emissivity down to low temperatures. At temperatures below about 100 Kelvin, this material performs much better than the paint itself. We measured the total hemispheric emissivity of various painted honeycomb configurations using an adaptation of an innovative technique developed for characterizing thin black coatings. These measurements were performed from room temperature down to 30 Kelvin. We describe the measurement technique and compare the results with predictions from a detailed thermal model of each honeycomb configuration.
Authors:
; ; ;  [1] ;  [2]
  1. NASA Goddard Space Flight Center, Code 552 Greenbelt, Maryland, 20771 (United States)
  2. Northrop Grumman Aerospace Systems Redondo Beach, CA 90278 (United States)
Publication Date:
OSTI Identifier:
22263960
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1573; Journal Issue: 1; Conference: International cryogenic materials conference, Anchorage, AK (United States), 17-21 Jun 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALUMINIUM; COMPARATIVE EVALUATIONS; CONFIGURATION; COOLING; COOLING SYSTEMS; EMISSIVITY; FORECASTING; RADIATORS; THERMAL RADIATION