Evaluation of Selected Thermal Control Coatings for Long-Life Space Structures

Evaluation of Selected Thermal Control Coatings for Long-Life Space Structures
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
Total Pages: 34
Release: 2018-12-31
Genre:
ISBN: 9781792703287

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Graphite-reinforced resin matrix composites are being considered for spacecraft structural applications because of their light weight, high stiffness, and lower thermal expansion. Thin protective coatings with stable optical properties and the proper ratio of solar absorption (alpha sub s) to thermal emittance (epsilon) minimize orbital thermal extremes and protect these materials against space environment degradation. Sputtered coatings applied directly to graphite/epoxy composite surfaces and anodized coatings applied to thin aluminum foil were studied for use both as an atomic oxygen barrier and as thermal control coatings. Additional effort was made to develop nickel-based coatings which could be applied directly to composites. These coating systems were selected because their inherent tenacity made them potentially more reliable than commercial white paints for long-life space missions. Results indicate that anodized aluminum foil coatings are suitable for tubular and flat composite structures on large platforms in low Earth orbit. Anodized foil provides protection against some elements of the natural space environment (atomic oxygen, ultraviolet, and particulate radiation) and offers a broad range of tailored alpha sub s/epsilon. The foil is readily available and can be produced in large quantities, while the anodizing process is a routine commercial technique. Teichman, Louis A. and Slemp, Wayne S. and Witte, William G., Jr. Langley Research Center NASA-TM-4319, L-16930, NAS 1.15:4319 RTOP 506-43-21...

Monthly Catalog of United States Government Publications

Monthly Catalog of United States Government Publications
Author: United States. Superintendent of Documents
Publisher:
Total Pages: 1072
Release: 1993
Genre: Government publications
ISBN:

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February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index

Ion Beam Treatment of Polymers

Ion Beam Treatment of Polymers
Author: Alexey Kondyurin
Publisher: Elsevier
Total Pages: 327
Release: 2010-07-07
Genre: Technology & Engineering
ISBN: 0080556744

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Polymer materials are used in different fields of industries, from microelectronice to medicine. Ion beam implantation is method of surface modification when surface properties must be significantly changed and bulk properties of material must be saved. Ion Beam Treatment of Polymers contains results of polymer investigations and techniques development in the field of polymer modification by high energy ion beams. This book is intended for specialists in polymer science who have interest to use an ion beam treatment for improvement of polymer properties, for specialists in physics who search a new application of ion beam and plasma equipment and also for students who look for future fields of high technology. Chapter 1-3 are devoted to overview of the basic processes at high energy ion penetration into solid target. The historical aspects and main physical aspects are covered. A basic equipment principles and main producers of equipment for ion beam treatment are considered. Chapter 4 contains chemical transformations in polymers during and after high energy ion penetration. The modern methods and results of experimental and theoretical investigation are described. Chapters 5-10 are devoted to properties of polymers after ion beam treatment, regimes of treatment, available applications, in particular: increase of adhesion of polymers and a mechanism of an adhesion increase, wetting angle of polymer by water and its stability, adhesion of cells on polymer surface, drug release regulation from polymer coating and others. Chapter 11 contains our last results on polymerisation processes in liquid oligomer composition under high vacuum, plasma and ion beam conditions as simulation of free space environment. * By scientists working in polymer chemistry, physics of ion beam implantation and in development and production of ion beam equipment * Covering industrial and scientific applications of ion beam implanted polymers * Also for students with an interest in future fields of high technology

NASA Technical Memorandum

NASA Technical Memorandum
Author:
Publisher:
Total Pages: 296
Release: 1991
Genre: Aeronautics
ISBN:

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