Materials Sciences in Space A Contribution to the Scientific Basis of Space Processing Edited by B. Feuerbacher, H. Hamacher and R. 1. Naumann With 199 Figures Springer-Verlag Berlin Heidelberg NewY ork Tokyo Prof. Berndt Feuerbacher Dr.-Ing. Hans Hamacher DFVLRe.V. Institute for Space Simulation Linder Hohe 5000 KOln 90, FRG Dr. Robert 1. Naumann NASA Marshall Space Flight Center Space Science Laboratory Alabama 35812, USA ISBN-13:978-3-642-82763-1 e-ISBN-13:978-3-642-82761-7 DOl: 10.1007/978-3-642-82761-7 This work. is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically those of translation, reprinting, re-use of illustrations, broadcasting, reproduction by photocopying machine or similar means, and storage in data banks. U nder§ 54 ofthe German Copyright Law where copies an!m ade for other than private use, a fee is payable to "Verwertungsgesellschaft Wort~, MunicH. © by Springer-Verlag Berlin, Heidelberg 1986 Softcover reprint of the hardcover 1st edition 1986 The use of registered names, trademarks, etc. in this publication does not imply, even in the absence ofa specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. 216113020-543210 Preface t~icrogravity research, a new field originating from the accessibility of space, has reached the age of adolescence. An impressive set of results has emerged from the fi rst Space 1 ab fl i ght, whi ch by now has been fully evaluated. In view of this and the wealth of information available from other space experiments, ground based research, and short-term microgra vity experiments in ai rp 1 anes, rockets or fall towers, it was felt that the time was ripe for a comprehensive review of the field. The initiative of the US to build a permanent station in space, which was soon followed by a European decision to join this venture, further focussed attention onto microgravity materials sciences. This originates from the interesting prospects of a commercial space uti 1 ization, which would heavily rely on the results of scientific or technical experiments in space. From this point of view it also seemed timely and essential to provi de prospective commerci a 1 users with the necessary i nformat i on on previous experience, and more importantly, with a sound scientific basis for space processing. The aim of the present volume consequently is twofold, namely - to stimulate new scientific experiments in space in order to expand our knowledge gained from microgravity research, and to provide industry with the information obtained from space experi ments sofar and to contribute to the scientific background for commer cial space utilization. By its very nature, the field of microgravity research is multidiscipli- VI nary. Therefore, a number of experts in vari ous sci ent i fi c di sci p 1 i nes was selected to give authoritative views in the various chapters of this volume. The book is written for a broad readership, including graduate level students, research scientists, up to senior scientists in the industrial management. Therefore , and in view of the multidisciplinary aspect, th~ various contributions are not written for the specialist in the field, but rather for the educated scientist or engineer working on a different subject area. The book is divided into four parts. The first three chapters serve as a general introduction, including the particular aspects of gravity reduc tion. The second part focuses on the physical phenomena underlying various space investigations. Here the fundamental background is summari zed, with special emphasis on those features that include an influence of gravity. Reference to actual space experiments is made herE: only in exeptional cases. Speci fi c poi nts concerni ng hardware for space experiments are di scussed in Part III. This is followed by a description of case studies and results in the last part of the book. Here results of experiments already flown in space are compiled in the various relevant fields, emphasizing the typical approaches and problems in microgravity experimen tation. An attempt is made to be exhaustive in available results up to Space 1a b 1, with a selection of important or characteri st i c future experiments. The editors express their thanks to all contributors to this volume, and to the numerous people involved in the compilation of this text. They are indebted to NASA, ESA, and the German Aerospace Research Establishment (DFVLR) for invaluable support. Our special thanks go to ~·1rs. Dagmar Horwath for her indispensable help in the production of this volume. Berndt Feuerbacher Hans Hamacher Robert J. Naumann Koln and Huntsville, September 1985 Contributors Beysens, Daniel Commissariat a L'Energie Atomique, F-91191 Gif sur Yvette Cedex, France Brown, Robert A. Massachussetts Institute of Technology, Cambridge MASS 01239, USA Doreaus, Robert H. Rensselear Polytechnic Institute, Materials Engineering Department, Troy, NY 12181, USA Elleaan, Daniel P. NASA-Jet Propulsion Laboratory, 4800 Oak Grove Dr, Pasadena, CA 91109, USA Favier, Jean-Jacques Commissariat a L'Energie Atomique, Centre d'Etudes Nucleaires, F-38041 Grenoble, France Feuerbacher, Berndt' Oeutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V. Institute for Space Simulation, 0-5000 Koln 90, Fed. Rep. of Germany Frohberq, Gunter Technische Universitat Berlin, Joachimstaler Str. 31/32 0-1000 Berlin 15, Fed. Rep. of Germany Gonfalone, Alain European Space Agency, NL-2200 AG Noordwijk, The Netherlands Haaacher, Hans Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V., Institute for Space Simulation, 0-5000 Koln 90, Fed. Rep. of Germany VIII Haynes, J. Michael University of Bristol, School of Chemistry, Cantock's Close, Bristol, England BS8 1TS Herlach, Dieter M. Deutsche Forschungs- und Versuchsanstalt flir Luft- und Raumfahrt e.V., Institute for Space Simulation, 0-5000 Koln 90, Fed. Rep. of Germany Hurle, Donald T.J. Royal Signals and Radar Establishment, St. Andrews Road, Great Malvern, Worc WR14 3PS, United Kingdom Langbein, Dieter Battelle-Institute e.V., Am Romerhof 35, 0-6000 Frankfurt/Main, Fed. Rep. of Germany Nauaann, Robert J. NASA-Marshall Space Flight Center, Space Science Laboratory, Alabama 35812, USA Saba, Peter R. Rheinisch-Westfalische Technische Hochschule Aachen, Foundry-Institute, Intze-Str. 5, D-5100 Aachen, Fed. Rep. of Germany Snyder, Robert S. NASA-Marshall Space Flight Center, Space Science Laboratory, Alabama 35812, USA Steinborn, Wolfgang Deutsche Forschungs- und Versuchsanstalt flir Luft- und Raumfahrt e.V., Space Oepartment, 0-5000 Koln 90, Fed. R~p. of Germany Stur., Jorg C. Rheinisch-Westfalische Technische Hochschule Aachen, Foundry-Institute, Intze-Str. 5, D-5100 Aachen, Fed. Rep. of Germany Walter, Hans-Ulrich European Space Agency, 8-10 Rue Mario-Nikis, F-75738 Paris, France Contents Part I: Microgravity Materials Sciences 1.J~oductLon. By B. Feuerbacher ................................... 3 1.1 The Space Utilization........ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5 1 .2 The Scientific Basis..... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.3 Present State and Future Developments ........................... 9 2.H~to~cal Development. By R.J. Naumann ............................ 11 2.1 Motivation for Microgravity Experiments ......................... 11 2.2 First Experiments........ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 13 2.2.1 Drop Tower and Aircraft Experiments ..................... 13 2.2.2 Apollo Experiments.................... . . . . . . . . . . . . . . . . .. 13 2.3 Skylab and Apollo-Soyus Test Project Experiments ................ 16 2.3. 1 Crystal Growth Experiments............ . . . . .. . . . . . . . . . . .. 21 2.3.2 Metallurgical Experiments ............................... 21 2.3.3 Electrophoresis Experiments ............................. 23 2.3.4 Skylab and Apollo-Soyus Experiments in Perspective ...... 24 2.4 SPAR Experiments.......................... . . . . . . . . . . . . . . . . . •. . .. 25 2.5 Creation of the Science Base .................................... 27 3.5~on ot W~e4~ne4~. By H. Hamacher ...................... 31 3.1 Free Fall: The Principle to Simulate Weightlessness ............. 31 3.2 Free Fall Trajectories........ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 33 3.3 The Orbital Flight.............................................. 34 3.3.1 Atmospheric Drag..................... . . . . . . . . . . . . . . . . . .. 36 3.3.2 Solar Radiation Pressure................................ 39 3.3.3 The Extended Spacecraft ................................. 40 3.3.4 G-jitter ................................................ 44 3.4 Other Free-Fall Methods ......................................... 47 3.4.1 Sounding Rockets ........................................ 47 3.4.2 Research Aircrafts ............. ~ ......................... 48 3.4.3 Drop Tubes and Drop Towers .............................. 49 XII Part II: Physical Phenoaena 53 8ufk 4. Convection and T~an4po~, By R.A. Brown ...................... 55 4. 1 Bulk Fluid Flow................................................. 55 4.2 Scalings for Flow and Species Transport ......................... 59 4.3 Transport Phenomena in Directional Solidification ............... 70 4.4 Transport Phenomena in the Floating Zone ........................ 78 4.5 Drop Dynamics.................. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 80 4.6 Summary and Perspective................................ . . . . . . . .. 84 5. D~ffu4~on and A~omLc T~an4po~, By G. Frohberg ..................... 93 5.1 Thermodynamics of Irreversible Processes ........................ 95 5. 1 . 1 Phenomenological Equations.............................. 95 5.1.2 Diffusion ............................................... 96 5.1.3 Transport Effects...... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 97 5.1.4 Influence of Gravity on Transport ....................... 100 5.2 Diffusion and Transport in Simple Systems ....................... 101 5.2.1 Reference System ........................................ 101 5.2.2 Simple Solutions of the Continuity Equation ............. 104 5.2.3 The Boltzmann-Matano Method ............................. 106 5.2.4 Experimental Methods and Problems ....................... 107 5.3 Theories of Diffusion Processes in Liquids ...................... 116 5.3.1 Diffusion and Viscosity ................................. 116 5.3.2 Quasicrystalline Models ................................. 117 5.3.3 Model of Critical Volume ................................ 117 5.3.4 Fluctuation Theory ...................................... 117 5.3.5 New Concepts and the Dynamic Structure of Liquid ........ 118 5.3.6 Theories of Transport Processes in Liquids .............. 119 5.3.7 Isotope Effect in Diffusion and Transport ............... 120 5.4 Influence of Diffusion on Related Experiments ................... 121 5.4.1 Solidification and Eutectic Alloys ...................... 121 5.4.2 Ostwald-Ripening ........................................ 124 5.4.3 Separation of Immiscible Liq~ids ........................ 124 5.4.4 Crystallization ......................................... 125 5.5 Conclusions ....................................................... 125