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Title: Construction and testing of advanced ceramic fabric radiator components

Abstract

For a number of years, we have been studying the application of advanced ceramic fabric materials to spacecraft heat rejection systems. Our studies indicated that significant mass and launch volume savings could be realized through such application, but concrete evidence to support this contention was lacking. Recently, we have performed tests that support our claims. Test results demonstrate that thin (about 130 ..mu..m) fabric tubes lined with metal foil can sustain pressures to 3 MPa. Even more intriguing are the results of heat transfer measurements. Although several of the ceramic fabrics exhibit promising optical properties, these would require considerable improvement if transmission of radiant energy from the metal foil through the fabrics were to be the chief heat rejection mechanism. Instead, we have found that a complex combination of conduction and radiation-absorption-reradiation mechanisms, which are poorly understood yet, achieves an effective emittance of about 0.7. That is, a ceramic fabric material such as aluminoborosilicate, which is normally considered a thermal insulator, acts as a moderate-emittance coating on the metal foil. 3 refs., 4 figs., 3 tabs.

Authors:
;
Publication Date:
Research Org.:
Pacific Northwest Lab., Richland, WA (USA)
OSTI Identifier:
6419344
Report Number(s):
PNL-SA-16305; CONF-890103-7
ON: DE89007239
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: 6. symposium on space nuclear power systems, Albuquerque, NM, USA, 9 Jan 1989; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; ALUMINIUM COMPOUNDS; OPTICAL PROPERTIES; BORON SILICATES; SILICON CARBIDES; SILICON OXIDES; TUBES; DESTRUCTIVE TESTING; CERAMICS; FOILS; HEAT TRANSFER; RADIATIVE COOLING; RADIATORS; SPACE VEHICLE COMPONENTS; BORON COMPOUNDS; CARBIDES; CARBON COMPOUNDS; CHALCOGENIDES; COOLING; ENERGY TRANSFER; HEAT EXCHANGERS; MATERIALS TESTING; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SILICATES; SILICON COMPOUNDS; TESTING; 360204* - Ceramics, Cermets, & Refractories- Physical Properties; 360203 - Ceramics, Cermets, & Refractories- Mechanical Properties; 320201 - Energy Conservation, Consumption, & Utilization- Transportation- Air & Aerospace

Citation Formats

Antoniak, Z.I., and Webb, B.J. Construction and testing of advanced ceramic fabric radiator components. United States: N. p., 1989. Web.
Antoniak, Z.I., & Webb, B.J. Construction and testing of advanced ceramic fabric radiator components. United States.
Antoniak, Z.I., and Webb, B.J. Sun . "Construction and testing of advanced ceramic fabric radiator components". United States.
@article{osti_6419344,
title = {Construction and testing of advanced ceramic fabric radiator components},
author = {Antoniak, Z.I. and Webb, B.J.},
abstractNote = {For a number of years, we have been studying the application of advanced ceramic fabric materials to spacecraft heat rejection systems. Our studies indicated that significant mass and launch volume savings could be realized through such application, but concrete evidence to support this contention was lacking. Recently, we have performed tests that support our claims. Test results demonstrate that thin (about 130 ..mu..m) fabric tubes lined with metal foil can sustain pressures to 3 MPa. Even more intriguing are the results of heat transfer measurements. Although several of the ceramic fabrics exhibit promising optical properties, these would require considerable improvement if transmission of radiant energy from the metal foil through the fabrics were to be the chief heat rejection mechanism. Instead, we have found that a complex combination of conduction and radiation-absorption-reradiation mechanisms, which are poorly understood yet, achieves an effective emittance of about 0.7. That is, a ceramic fabric material such as aluminoborosilicate, which is normally considered a thermal insulator, acts as a moderate-emittance coating on the metal foil. 3 refs., 4 figs., 3 tabs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}

Conference:
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