Chapter 44. Microstructure and High Temperature Properties of Nextel 720 Fibers

  1. John B. Wachtman Jr.
  1. D. M. Wilson,
  2. S. L. Lieder and
  3. D. C. Lueneburg

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314784.ch44

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 16, Issue 5

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 16, Issue 5

How to Cite

Wilson, D. M., Lieder, S. L. and Lueneburg, D. C. (1995) Microstructure and High Temperature Properties of Nextel 720 Fibers, in Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 16, Issue 5 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314784.ch44

Author Information

  1. Metal Matrix Composite Department 3M Co., St. Paul, MN 55144-1000

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1995

ISBN Information

Print ISBN: 9780470375389

Online ISBN: 9780470314784

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Keywords:

  • competitive;
  • laminated;
  • efficiency;
  • innovation;
  • beneficiation

Summary

The high temperature tensile strength and creep properties of Nextel 720 were measured in the temperature range 1000°C — 1300°C. The creep rate for the Nextel 720 fibers was three orders of magnitude less than single phase polycrystalline alumina fibers such as Nextel 610, and 85% of room tensile strength was retained at 1200°C. These exceptional high temperature properties were attributed to a unique, two-phase microstructure consisting of mosaic and elongated grains of α-Al2O3 and mullite. The room temperature single filament strength of Nextel 720 averaged 2100 MPa, and the elastic modulus was 260 GPa.