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Author : Joyce A. Dever
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (317 download)
Download or read book Low Earth Orbital Atomic Oxygen and Ultraviolet Radiation Effects on Polymers written by Joyce A. Dever and published by . This book was released on 1991 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ron Intrater
Publisher : LAP Lambert Academic Publishing
ISBN 13 : 9783843373166
Total Pages : 180 pages
Book Rating : 4.3/5 (731 download)
Download or read book Ultra Violet and Atomic Oxygen Effects on Different Polyethylene Types written by Ron Intrater and published by LAP Lambert Academic Publishing. This book was released on 2010-11 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: External surfaces of spacecrafts in low earth orbit (LEO) are exposed to atomic oxygen (AO) and solar UV radiation. The present work studies the interaction of various polyethylenes with different RF oxygen plasma components. Erosion ot the samples showed an etching rate that is dependent on the degree of crystallinity: the higher the crystallinity level the lower the erosion rate. The addition of VUV radiation to the AO flux resulted in a significant increase of the etching rate. A process is reported whereby ordered nano domains are formed and a morphological reconstraction is generated into row-structure on the surface of Ultra- strong, UHMWPE fibers as aresult of the simultaneous exposure to oxygen and UV radiation in the afterglow of RF oxygen plasma. The orientation of the rows is perpendicular to the fiber direction. A possible explanation for this phenomenon is that the combined irradiation resulted in selective etching of the amorphous phase and release of polyethylene nano- rods of which the fiber is composed. Subsequently these nano-rods self-assembled on the surface of the fiber into row-structure.
Author : Jacob Kleiman
Publisher : Springer Science & Business Media
ISBN 13 : 3642302289
Total Pages : 606 pages
Book Rating : 4.6/5 (423 download)
Download or read book Protection of Materials and Structures From the Space Environment written by Jacob Kleiman and published by Springer Science & Business Media. This book was released on 2012-09-22 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goals of the 10th International Space Conference on “Protection of Materials and Structures from Space Environment” ICPMSE-10J, since its inception in 1992, have been to facilitate exchanges between members of the various engineering and science disciplines involved in the development of space materials, including aspects of LEO, GEO and Deep Space environments, ground-based qualification, and in-flight experiments and lessons learned from operational vehicles that are closely interrelated to disciplines of the atmospheric sciences, solar-terrestrial interactions and space life sciences. The knowledge of environmental conditions on and around the Moon, Mars, Venus and the low Earth orbit as well as other possible candidates for landing such as asteroids have become an important issue, and protecting both hardware and human life from the effects of space environments has taken on a new meaning in light of the increased interest in space travel and colonization of other planets. And while many material experiments have been carried out on the ground and in open space in the last 50 years (LDEF, MEEP, SARE, MISSE, AOP, DSPSE, ESEM, EURECA, HST, MDIM, MIS, MPID, MPAC and SEED), many questions regarding the environmental impact of space on materials remain either poorly understood or unanswered. The coming generations of scientists will have to continue this work and tackle new challenges, continuing to build the level of confidence humans will need to continue the colonization of space. It is hoped that the proceedings of the ICPMSE-10J presented in this book will constitute a small contribution to doing so.
Author : Sharon K. Rutledge
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (317 download)
Download or read book Atomic Oxygen Texturing of Polymers and Carbons written by Sharon K. Rutledge and published by . This book was released on 1997 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.:/5 (317 download)
Download or read book Techniques for Measuring Low Earth Orbital Atomic Oxygen Erosion of Polymers written by and published by . This book was released on 2002 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (317 download)
Download or read book Issues and Consequences of Atomic Oxygen Undercutting of Protected Polymers in Low Earth Orbit written by and published by . This book was released on 2002 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mohammed Jaradat
Publisher :
ISBN 13 :
Total Pages : 173 pages
Book Rating : 4.:/5 (94 download)
Download or read book Environmental Degradation of Nano Enhanced Polymers in Low Earth Orbit written by Mohammed Jaradat and published by . This book was released on 2014 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymers are widely used in space shuttles and systems due to the unique properties they possess. However, the extremely harsh conditions in the low earth orbit (LEO), which ranges from 200-1800 km above the earth, have a degrading effect on those polymers. The predominant component of the LEO atmosphere is Atomic Oxygen (AO), which is a single O atom formed through the dissociation of molecular oxygen by ultra violet radiation from the sun. AO particles collide with a kinetic energy of approximately 5 eV, this energy is enough to facilitate the degradation of most polymers. An organic/inorganic hybrid material approach is used in this study through the incorporation of polyhedral oligomeric silsesquixanes (POSS) into traditional polymer systems. Several materials with different POSS percentages and exposure times to oxygen plasma (glassification process) are considered for this research. Following a pre-testing process only selected specimens are sent to the atomic oxygen testing facility at Marshall Space and Flight Center to be tested and evaluated. The specimens were assessed using the dynamic mechanical analysis and atomic force microscopy techniques to characterize the surface and obtain different mechanical and physical properties. A computational approach in the form of Molecular Dynamics (MD) simulations are performed on a polyimide and polyimide/POSS systems and elastic properties are determined. The selected materials with higher POSS percentages generally performed better in terms of mass loss of the tested systems due to the rapid and more complete formation of an oxidized protective layer that significantly limits further degradation once it formed. The glassification process doesn't seem to improve the resistance against AO attacks greatly at such small exposure times, never the less a slight improvement is noticed.
Author : J. Kleiman
Publisher : Springer Science & Business Media
ISBN 13 : 940114768X
Total Pages : 260 pages
Book Rating : 4.4/5 (11 download)
Download or read book Protection of Materials and Structures from the Low Earth Orbit Space Environment written by J. Kleiman and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication presents the proceedings of ICPMSE-3, the third international conference on Protection of Materials and Structures from the Low Earth Orbit Space Environment, held in Toronto April 25-26, 1996. The conference was hosted and organized by Integrity Testing Laboratory Inc, (ITL), and held at the University of Toronto's Institute for Aerospace Studies (UTIAS), where ITL is located. Twenty industrial companies, seven wliversities and eight government agencies from Canada, USA, United Kingdom, France, Israel, Russia, Ukraine and the Netherlands were represented by over 55 participants indicating increasing international co-operation in this critical arena of protection of materials in space. Twenty-five speakers, world experts in their fields, delivered talks on a wide variety of topics on various aspects of material protection in space, Representatives from the Canadian, American, European and Israeli space agencies as well as from leading space research laboratories of major aerospace industries gathered at UTIAS to discuss the latest developments in the field of material and structure protection from the harsh space environment, These proceedings are organized into four sections: a) AONOV and Radiation Effects on Materials and Structures in the Leo Space Environment; b) Interaction of Matter with the LEO Environment; c) Large Scale Coating Process Developments for Protection in LEO; d) Synthesis and Modification of Materials and Surfaces for Protection in LEO, This is the third in our on-going series of bi-annual international space materials conferences wllich began in 1992 in Toronto. Jacob Kleiman, Integrity Testing Laboratory Inc.
Author : Jacob I. Kleiman
Publisher : Springer Science & Business Media
ISBN 13 : 1402043198
Total Pages : 456 pages
Book Rating : 4.4/5 (2 download)
Download or read book Protection of Materials and Structures from the Space Environment written by Jacob I. Kleiman and published by Springer Science & Business Media. This book was released on 2006-07-13 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of various space environment factors like atomic oxygen, vacuum ultraviolet radiation, charging, micrometeoroids, meteoroid showers, etc. on materials and structures in various orbits are discussed. In addition the ways to prevent these effects or reduce them through protection by coatings or modification of affected surfaces are considered in the book. The discussions on development of predictive models of material erosion that will allow the materials engineers and designers of future spacecraft to evaluate materials' behaviour is continued from the past meetings.
Author : Thomas S. Gates
Publisher : ASTM International
ISBN 13 : 9780803124240
Total Pages : 276 pages
Book Rating : 4.1/5 (242 download)
Download or read book High Temperature and Environmental Effects on Polymeric Composites written by Thomas S. Gates and published by ASTM International. This book was released on 1997 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. Kleiman
Publisher : Springer Science & Business Media
ISBN 13 : 1402025955
Total Pages : 553 pages
Book Rating : 4.4/5 (2 download)
Download or read book Protection of Materials and Structures from Space Environment written by J. Kleiman and published by Springer Science & Business Media. This book was released on 2006-03-09 with total page 553 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication presents the proceedings of ICPMSE-6, the sixth international conference on Protection of Materials and Structures from Space Environment, held in Toronto May 1-3, 2002. The ICPMSE series of meetings became an important part of the LEO space community since it was started in 1991. Since then, the meeting has grown steadily, attracting a large number of engineers, researchers, managers, and scientists from industrial companies, scientific institutions and government agencies in Canada, U. S. A. , Asia, and Europe, thus becoming a true international event. This year’s meeting is gaining even stronger importance with the resumption of the ISS and other space projects in LEO, GEO and Deep Space. To reflect on these activities, the topics in the program have been extended to include protection of materials in GEO and Deep Space. The combination of a broad selection of technical and scientific topics addressed by internationally known speakers with the charm of Toronto and the hospitality of the organizers brings participants back year after year. The conference was hosted and organized by Integrity Testing Laboratory Inc. (ITL), and held at the University of Toronto’s Institute for Aerospace Studies (UTIAS). The meeting was sponsored by the Materials and Manufacturing Ontario (MMO) and the CRESTech, two Ontario Centres of Excellence; Air Force Office of Scientific Research (AFOSR/NL); MD Robotics; EMS Technologies; The Integrity Testing Laboratory (ITL); and the UTIAS.
Author :
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (317 download)
Download or read book Environmental Durability Issues for Solar Power Systems in Low Earth Orbit written by and published by . This book was released on 1994 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Atomic Oxygen Erosion Resistance of Organic Polymers for Low Earth Orbit Spacecraft [microform] PDF Online Free](https://books.google.com/books/content/images/frontcover/Qrm4AAAACAAJ?fife=w200-h370)
Author : Grant Rheal Cool
Publisher : National Library of Canada = Bibliothèque nationale du Canada
ISBN 13 : 9780612354319
Total Pages : pages
Book Rating : 4.3/5 (543 download)
Download or read book Atomic Oxygen Erosion Resistance of Organic Polymers for Low Earth Orbit Spacecraft [microform] written by Grant Rheal Cool and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bankim Chandra Ray
Publisher : Woodhead Publishing
ISBN 13 : 012818955X
Total Pages : 252 pages
Book Rating : 4.1/5 (281 download)
Download or read book Micro and Nanophased Polymeric Composites written by Bankim Chandra Ray and published by Woodhead Publishing. This book was released on 2024-06-15 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micro and Nanophased Polymeric Composites: Durability Assessment in Engineering Applications provides a comprehensive review of in-service environmental damage and degradation studies of FRP composites in a broad range of different applications. End-users such as academic and industrial researchers and materials scientists and engineers working in the design, analysis, and manufacture of composite material systems will be able to identify the possible superior advantages and limitations of FRP composites in various applications. Particular emphasis is given on the identification of various failure micro-mechanisms leading to unprecedented failure in different harsh and hostile environments.Divided into two distinct parts, the first section focuses on fundamentals, with key chapters on the main constituents of FRP composites, mechanical properties, characterization techniques, and processing and fabrication techniques. Part two focuses on polymer composites under different in-service applications, including the marine and space environment, chemical and corrosive environments, high and low temperature environments, and other critical environments. - Covers various micro-mechanisms of failure under different environmental conditions, including moisture diffusion kinetics and the effects of aging parameters on microstructures - Discusses the impact of different nanoscale reinforcements on the environmental durability of conventional FRP composites - Presents a comprehensive approach with widespread applications such as low earth orbit space environments and different corrosive environments
Author : David A. Stubbs
Publisher : ASTM International
ISBN 13 : 0803124031
Total Pages : 266 pages
Book Rating : 4.8/5 (31 download)
Download or read book Nontraditional Methods of Sensing Stress, Strain, and Damage in Materials and Structures written by David A. Stubbs and published by ASTM International. This book was released on 1997 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: These facsimiles of 16 contributions from the symposium held in May 1996 in Orlando provide information on the behavior of materials and structures. The authors describe novel ways to measure point to point deformation (or strain, when normalized), procedures for measuring crack length and the stres
Author : Rainer A. Dressler
Publisher : World Scientific
ISBN 13 : 9789812811882
Total Pages : 644 pages
Book Rating : 4.8/5 (118 download)
Download or read book Chemical Dynamics in Extreme Environments written by Rainer A. Dressler and published by World Scientific. This book was released on 2001 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: As computing power increases, a growing number of macroscopic phenomena are modeled at the molecular level. Consequently, new requirements are generated for the understanding of molecular dynamics in exotic conditions. This book illustrates the importance of detailed chemical dynamics and the role it plays in the phenomenology of a number of extreme environments. Each chapter addresses one or more extreme environments, outlines the associated chemical mechanisms of relevance, and then covers the leading edge science that elucidates the chemical coupling. The chapters exhibit a balance between theory and experiment, gas phase, solid state, and surface dynamics, and geophysical and technical environments. Sample Chapter(s). Chapter 1.1: Introduction (203 KB). Chapter 1.2: Chemistry at High Temperatures and Pressures (99 KB). Chapter 1.3: High Temperature Chemistry in the Atmosphere (82 KB). Chapter 1.4: Low Temperature Chemistry (90 KB). Chapter 1.5: Conclusions (131 KB). Contents: Exploring Chemistry in Extreme Environments: A Driving Force for Innovation (M R Berman); Chemistry Under Extreme Conditions: Cluster Impact Activation (T Raz & R D Levine); Nonequilibrium Chemistry Modeling in Rarefied Hypersonic Flows (I D Boyd); Chemical Dynamics in Chemical Laser Media (M C Heaven); From Elementary Reactions to Complex Combustion Systems (C Schulz et al.); The Gas-Phase Chemical Dynamics Associated with Meteors (R A Dressler & E Murad); Dynamics of Hypervelocity Gas/Surface Collisions (D C Jacobs); Surface Chemistry in the Jovian Magnetosphere Radiation Environment (R E Johnson); Dynamics of Atomic Oxygen Induced Polymer Degradation in Low Earth Orbit (T K Minton & D J Garton); Atomic-Level Properties of Thermal Barrier Coatings: Characterization of MetalOCoCeramic Interface (A Christensen et al.); Molecular Dynamics Simulations of Detonations (C T White et al.). Readership: Scientists engaged in cross-disciplinary work and chemists studying multidisciplinary problems."
Author :
Publisher :
ISBN 13 :
Total Pages : 538 pages
Book Rating : 4.:/5 (319 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
