International Journal of Thermophysics

, Volume 22, Issue 2, pp 569–578 | Cite as

Containerless Processing in Space—Thermophysical Property Measurements Using Electromagnetic Levitation

Article

Abstract

Electromagnetic levitation is a novel tool for measuring thermophysical properties of high-temperature metallic melts. Contamination by a crucible is avoided, and undercooling becomes possible. By exploiting the microgravity environment of an orbiting spacecraft, the positioning fields can be further reduced and undesired side effects of these fields can be minimized. After two successful Spacelab flights of the electromagnetic levitation facility TEMPUS, an advanced electromagnetic levitation facility is presently being studied for accommodation on the International Space Station, ISS. Due to the permanent nature of the ISS, an operational concept must be defined which allows the exchange of consumables without exchanging the entire facilty. This is accomplished by a modular design, which is presented. For all experiments, like measurement of specific heat, of surface tension and viscosity, of thermal expansion, and of electrical conductivity, noncontact diagnostic tools must be either improved or developed. Such tools are, for example, pyrometry, videography (high-speed and high-resolution), and inductive measurements. This paper summarizes the scientific results obtained so far and deduces some lessons learned that will be incorporated into the new design and will lead to both new results and a higher precision of the data.

containerless processing electromagnetic levitation liquid metals microgravity thermophysical properties 

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REFERENCES

  1. 1.
    G. Lohöfer, P. Neuhaus, and I. Egry, High Temp. High Press. 23:333 (1991).Google Scholar
  2. 2.
    E. Fromm, Met. Trans. 9A:1835 (1978).Google Scholar
  3. 3.
    I. Egry, G. Lohoöfer, and G. Jacobs, Phys. Rev. Lett. 75:4043 (1995).Google Scholar
  4. 4.
    I. Egry, G. Lohoöfer, I. Seyhan, S. Schneider, and B. Feuerbacher, Appl. Phys. Lett. 73:462 (1998).Google Scholar
  5. 5.
    H. Fecht and W. Johnson, Rev. Sci. Instr. 62:1299 (1991).Google Scholar
  6. 6.
    S. Glade, R. Busch, D. Lee, and W. Johnson, R. Wunderlich, and H.-J. Fecht, J. Appl. Phys. 87:7242 (2000).Google Scholar
  7. 7.
    S. Sauerland, K. Eckler, and I. Egry, J. Mat. Sci. Lett. 11:330 (1992).Google Scholar
  8. 8.
    D. Cummings and D. Blackburn, J. Fluid Mech. 224:395 (1991).Google Scholar
  9. 9.
    A. Bratz and I. Egry, J. Fluid Mech. 298:341 (1995).Google Scholar
  10. 10.
    B. Damaschke, K. Samwer and I. Egry, in Solidification 1999, W. Hofmeister, J. Rogers, N. Singh, S. Marsh, and P. Vorhees, eds. (TMS, Warrendale, PA, 1999), p. 43.Google Scholar
  11. 11.
    G. Lohoöfer and I. Egry, in Solidification 1999, W. Hofmeister, J. Rogers, N. Singh, S. Marsh, and P. Vorhees, eds. (TMS, Warrendale, PA, 1999), p. 65.Google Scholar
  12. 12.
    A. Diefenbach, M. Kratz, D. Uffelmann, and R. Willnecker, Acta Astronaut. 35:719 (1995).Google Scholar
  13. 13.
    A. Diefenbach, B. Paetz, R. Willnecker, J. Piller, A. Seidel, and M. Stauber, submitted for publication.Google Scholar

Copyright information

© Plenum Publishing Corporation 2001

Authors and Affiliations

  1. 1.Institut für RaumsimulationDLRKölnGermany
  2. 2.Microgravity User Support CenterDLRKölnGermany
  3. 3.Projektdirektion RaumfahrtDLRKölnGermany
  4. 4.Daimler-Chrysler AerospaceFriedrichshafenGermany

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