Chapter 20. Thermo-Mechanical Properties of Silicon Carbide Yarn

  1. William Smothers
  1. A. S. Fareed,
  2. P. Fang,
  3. M. J. Koczak and
  4. F. Ko

Published Online: 27 MAR 2008

DOI: 10.1002/9780470320341.ch20

10th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 7, Issue 7/8

10th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 7, Issue 7/8

How to Cite

Fareed, A. S., Fang, P., Koczak, M. J. and Ko, F. (1986) Thermo-Mechanical Properties of Silicon Carbide Yarn, in 10th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 7, Issue 7/8 (ed W. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470320341.ch20

Author Information

  1. Dept. Materials Eng., Drexel Univ., Philadelphia, PA 19104

Publication History

  1. Published Online: 27 MAR 2008
  2. Published Print: 1 JAN 1986

ISBN Information

Print ISBN: 9780470374672

Online ISBN: 9780470320341

SEARCH

Summary

The thermal degradation behavior of silicon carbide yarn has been studied with regard to fiber surface degradation and tensile strength. Thermal characteristics of the fibers were analyzed by differential scanning calorimetry, thermo-gravimetric analysis and differential thermal analysis. Yarns were thermally exposed to 600 d̀, 1000d̀, and 1300d̀C in air and argon atmospheres. Fiber surfaces were examined in the scanning electron microscope to assess reaction thermodynamics and kinetics, α-cristobalite was identified in yarns thermally exposed to 1300 d̀C in air using X-ray diffraction techniques. Strength values ranged from 1550 MPa in the as-received condition to 0.7 MPa for yarns exposed to 1300 d̀C in air. A correlation between fiber strength and thermal response elucidates SiC strength degradation at elevated temperatures in terms of binder loss, handling, oxidation, surface degradation, and interfiber bonding. (This paper is to be published in Advanced Ceramic Materials.)