Chapter 10. Inviscid Melt Spinning of Alumina Fibers: Jet Stabilization Mechanism

  1. John B. Wachtman Jr
  1. F. T. Wallenberger1,
  2. N. E. Weston2 and
  3. K. Motzfeldt3

Published Online: 28 MAR 2008

DOI: 10.1002/9780470313831.ch10

Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8

Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8

How to Cite

Wallenberger, F. T., Weston, N. E. and Motzfeldt, K. (1991) Inviscid Melt Spinning of Alumina Fibers: Jet Stabilization Mechanism, in Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313831.ch10

Author Information

  1. 1

    DuPont Fibers Wilmington, DE 19880–0302

  2. 2

    Micron Incorporated Analytical Services Laboratory, Wilmington, DE 19805

  3. 3

    Institute of Inorganic Chemistry The Technical University of Norway N-7034 Trondheim Norway

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1991

ISBN Information

Print ISBN: 9780470375099

Online ISBN: 9780470313831

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Keywords:

  • alwnina;
  • temperatures;
  • crystalline;
  • heterogeneous;
  • amorphous

Summary

Calcium aluminate fibers with >50% alumina can neither be drawn from the melt nor conventionally melt spun. The viscosities are too low. They can be made by inviscid melt spinning whereby a molten jet with a viscosity of <0.6 Pa·s is ejected into propane. The pyrolytic decomposition of' propane stabilizes the molten jet. The resulting fiber has a carbon-rich skin and usually, but not always, a black carbon sheath. This paper proposes a rheological jet stabilization mechanism. Particulate carbon enters into the skin of the molten jet, increases the surface viscosity, prevents breakup of the jet into Rayleigh waves and droplets, and facilitates spinning continuity.