Materials Processing in High Gravity

1. Front Matter

   Pages i-viii

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2. Introduction to Materials Processing in Large Centrifuges

   • Liya L. Regel, William R. Wilcox

   Pages 1-15

3. Thermal Stability and the Suppression of Convection in a Rotating Fluid on Earth

   • William A. Arnold, Liya L. Regel

   Pages 17-34

4. Convective Flows during Crystal Growth in a Centrifuge

   • Vadim A. Urpin

   Pages 35-41

5. Removal of Convective Instabilities in Liquid Metals by Centrifugation

   • Alain Chevy, Pascal Williams, Michel Rodot, Gérard Labrosse

   Pages 43-51

6. Growth of GaAs Single Crystals at High Gravity

   • Bojun Zhou, Funian Cao, Lanying Lin, Wenju Ma, Yun Zheng, Feng Tao et al.

   Pages 53-60

7. Response of Temperature Oscillations in a Tin Melt to Centrifugal Effects

   • W. J. Ma, F. Tao, Y. Zheng, M. L. Xue, B. J. Zhou, L. Y. Lin

   Pages 61-66

8. Unsteady Thermal Convection of Melts in a 2-D Horizontal Boat in a Centrifugal Field with Consideration of the Coriolis Effect

   • F. Tao, Y. Zheng, W. J. Ma, M. L. Xue

   Pages 67-79

9. Variation of Effective Impurity Segregation Coefficient in Tellurium Grown under High Gravity

   • I. I. Farbshtein, R. V. Parfeniev, N. K. Shulga, L. L. Regel

   Pages 81-88

10. Analysis of Impurity Distribution by Galvanomagnetic Method in InSb Obtained under High Gravity Conditions

    • I. I. Farbshtein, R. V. Parfeniev, S. V. Yakimov, L. L. Regel, Ramnath Derebail, W. R. Wilcox

    Pages 89-93

11. The Influence of Gravity on Pb1-xSnxTe Crystals Grown by the Vertical Bridgman Method

    • Y. A. Chen, I. N. Bandeira, A. H. Franzan, S. Eleutério Filho, M. R. Slomka

    Pages 95-100

12. Microstructural Development in Pb-Sn Alloys Subjected to High-Gravity during Controlled Directional Solidification

    • R. N. Grugel, A. B. Hmelo, C. C. Battaile, T. G. Wang

    Pages 101-110

13. The Role of Thermal Stress In Vertical Bridgman Growth of CdZnTe Crystals

    • Taipao Lee, John C. Moosbrugger, Frederick M. Carlson, David J. Larson Jr.

    Pages 111-121

14. Morphological Stability of Directional Solidification in a Centrifugal Field

    • Valentin S. Yuferev

    Pages 123-131

15. Effects of Coriolis and Centrifugal Forces on the Melt during Directional Solidification of a Binary Alloy

    • D. N. Riahi

    Pages 133-137

16. Modeling and Experiments on Epitaxial Growth on a GaAs Hemisphere Substrate at 1 g and under Hypergravity

    • Jean-Claude Launay, Stéphanie Bouchet, Anthony Randriamampianina, Patrick Bontoux, Pierre Gibart

    Pages 139-160

17. Fire Behavior in Macrogravity

    • Jie Chen, Jean-Michel Most, Pierre Joulain, Daniel Durox

    Pages 161-169

18. Coriolis Effect on Heat Transfer Experiment using Hot-Wire Technique on Centrifuge

    • Taketoshi Hibiya, Shin Nakamura, Kyung-Woo Yi, Koichi Kakimoto

    Pages 171-179

19. Crystal Growth of Energetic Materials during High Acceleration using an Ultracentrifuge

    • M. Y. D. Lanzerotti, J. Autera, J. Pinto, J. Sharma

    Pages 181-184

20. Gel Polymerization at High Gravity

    • V. A. Briskman, K. G. Kostarev, T. P. Lyubimova

    Pages 185-192

There are two motives for studying materials processing in centrifuges. First, such research improves our understanding of the influence of acceleration and convection on materials processing. Second, there are commercial opportunities for production of unique and improved materials that cannot be prepared under normal earth conditions or in space. Through a combination of experiments and theory, we are gaining an understanding of centrifugation on phenomena of importance to materials processing. We find that it is necessary to consider not only acceleration, but also the Corio lis effect and the variation of acceleration with position. As one consequence, the vigor of buoyancy-driven convection is sometimes increased by centrifugation and sometimes decreased. Similarly, the tendency of the convection to become unstable or oscillatory may either be increased or decreased by centrifugation. On the other hand, the observed effects of centrifugation on product quality have largely gone unexplained. This volume constitutes the proceedings of The Second International Workshop on Materials Processing at High Gravity, hosted by Clarkson University in June of 1993. The concept for a workshop on materials processing in centrifuges was born at a series of informal meetings held in Paris in 1990. The First International Workshop on Materials Processing at High Gravity was held in May of 1991 in Dubna, USSR, on the banks of the Volga River. The proceedings of this workshop was published in 1992 as a special issue of the Journal of Crystal Growth.

• alloy
• crystal
• development
• liquid
• production

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