Development of Improved Thermal Control Coatings for Space Assets PDF Download
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Languages : en
Pages : 13
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Thermal control coatings play a critical role in the thermal management of space assets through reflection of incident solar energy and emittance of infrared heat. An investigation into the potential minimization of required film thickness through optimization of zinc oxide pigment particle size was performed. The utilization of a 1.5-micron average particle size pigment in the coating formulation resulted in a slightly improved solar absorbance/emittance value of 0.132 in comparison with the currently used 5.0 micron average particle size pigment. Furthermore, this improved value was obtained at a dry film thickness 18% thinner (4.9 mils) than the current state of the art, which translates to weight savings without a sacrifice in thermal management properties. Use of the smaller particle size pigment also resulted in an improvement in the measured emittance (0.94), likely due to a more uniform surface roughness and fewer large pores present in the film.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 13
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Book Description
Thermal control coatings play a critical role in the thermal management of space assets through reflection of incident solar energy and emittance of infrared heat. An investigation into the potential minimization of required film thickness through optimization of zinc oxide pigment particle size was performed. The utilization of a 1.5-micron average particle size pigment in the coating formulation resulted in a slightly improved solar absorbance/emittance value of 0.132 in comparison with the currently used 5.0 micron average particle size pigment. Furthermore, this improved value was obtained at a dry film thickness 18% thinner (4.9 mils) than the current state of the art, which translates to weight savings without a sacrifice in thermal management properties. Use of the smaller particle size pigment also resulted in an improvement in the measured emittance (0.94), likely due to a more uniform surface roughness and fewer large pores present in the film.
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Category :
Languages : en
Pages : 13
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Book Description
Thermal control coatings (TCCs) play a critical role in the thermal management of space assets through the reflection of incident solar energy and emittance of infrared heat. The development of new thermal control coatings with improved solar energy reflection, infrared emittance, and reduced weight are essential to the design of future space assets that will reside in harsh environments and have increasing constraints on weight. Optimization of pigment particle size and type can play an important role in the development of improved coatings. Recent improvements in the synthesis and particle size control of zinc orthotitanate pigment for silicate binder coatings have resulted in performance improvements over prior coatings of this type as well as the current zinc oxide based coatings. In addition, a novel pigment concept based on hollow silica particles is continuing to be explored as an extremely space durable and lightweight option for passive thermal control coatings.
Author: J. E. GILLIGAN
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ISBN:
Category :
Languages : en
Pages : 40
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Author: J. E. GILLIGAN
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Category :
Languages : en
Pages : 22
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Author: John H. Henninger
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Category : Space vehicles
Languages : en
Pages : 56
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781720387794
Category :
Languages : en
Pages : 54
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This final report is concerned with the tasks performed during the contract period which included spacecraft coating development, testing, and applications. Five marker coatings consisting of a bright yellow handrail coating, protective overcoat for ceramic coatings, and specialized primers for composites (or polymer) surfaces were developed and commercialized by AZ Technology during this program. Most of the coatings have passed space environmental stability requirements via ground tests and/or flight verification. Marker coatings and protective overcoats were successfully flown on the Passive Optical Sample Assembly (POSA) and the Optical Properties Monitor (OPM) experiments flown on the Russian space station MIR. To date, most of the coatings developed and/or modified during this program have been utilized on the International Space Station and other spacecraft. For ISS, AZ Technology manufactured the 'UNITY' emblem now being flown on the NASA UNITY node (Node 1) that is docked to the Russian Zarya (FGB) utilizing the colored marker coatings (white, blue, red) developed by AZ Technology. The UNITY emblem included the US American flag, the Unity logo, and NASA logo on a white background, applied to a Beta cloth substrate.Mell, Richard J.Marshall Space Flight CenterPROTECTIVE COATINGS; THERMAL CONTROL COATINGS; OPTICAL PROPERTIES; COLOR
Author: Louis A. Teichman
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ISBN:
Category :
Languages : en
Pages : 20
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Author: R. J. Mell
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Category :
Languages : en
Pages : 177
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An important aspect of satellite operation in a space environment is thermal control design. Various coatings having desired optical properties have been used to achieve passive thermal control of different spacecraft. IITRI's S13G/LO coating has found widespread use in a number of missions for 15 years. The source of binder material for S13G/LO, however, is now unavailable and there is a continuing need on various spacecraft missions for this type of coating was to display desirable and reliable behavior in a space environment. The study has resulted in a material designated, S13G/LO-, however, is now unavailable and there is a continuing need on various spacecraft missions for this type of coating. This report covers research to develop and qualify a material having the same or improved optical and physical properties as S13G/Lo. The coating was to display desirable and reliable behavior in a space environment. The study has resulted in a material designated, S13G/Lo-1, which exhibits properties as good as, or somewhat better than the original S13G/LO. Keywords: Coatings, Space Environment, Satellite Thermal Control, Radiation Effects, Material Outgassing, Silicone Resin.
Author: Roger C. Linton
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ISBN:
Category :
Languages : en
Pages :
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781721153459
Category :
Languages : en
Pages : 130
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Book Description
The successful thermal design of spacecraft depends in part on a knowledge of the solar absorption and hemispherical emittance of the thermal control coatings used in and on the spacecraft. Goddard Space Flight Center has had since its beginning a group whose mission has been to provide thermal/optical properties data of thermal control coatings to thermal engineers. This handbook represents a summary of the data and knowledge accumulated over many years at GSFC. Kauder, Lonny Goddard Space Flight Center
