Chapter 85. Effect of Cleaning and Abrasion-Induced Damage on the Room Temperature Tensile Strength of Sapphire Fibers

  1. John B. Wachtman Jr.
  1. E. R. Trumbauer,
  2. J. R. Hellmann,
  3. D. L. Shelleman and
  4. D. A. Koss

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314180.ch85

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8

How to Cite

Trumbauer, E. R., Hellmann, J. R., Shelleman, D. L. and Koss, D. A. (1993) Effect of Cleaning and Abrasion-Induced Damage on the Room Temperature Tensile Strength of Sapphire Fibers, in Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314180.ch85

Author Information

  1. The Center for Advanced Materials The Pennsylvania Stale University University Park, PA 16802

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1993

ISBN Information

Print ISBN: 9780470375266

Online ISBN: 9780470314180

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Keywords:

  • evaluated;
  • degradation;
  • tremendous;
  • self-abrasion;
  • deionized

Summary

Room temperature tensile strengths of sapphire fibers were evaluated in the as-received condition (Dow MethocelTM sizing applied by Saphikon), after flame cleaning, after cold water washing, and after a chemical cleaning procedure. Flame cleaning yielded an approximately 30% degradation in strength compared to the other surface treatments. Fractographic analysis revealed surface deposits at the failure origins of flame cleaned fibers; EDS analysis revealed the presence of Na, CI, Ca, Fe, and Ce impurities in the deposits. Tensile strengths were also evaluated for unsized fibers in the as-received condition, after flame cleaning, and after self-abrasion. Flame cleaning of unsized fibers yielded a less significant strength degradation than was observed for sized fibers and self-abrasion resulted in a 30% degradation in strength. Results indicate that use of sizing is imperative for preventing fiber damage during handling, but that improved procedures for sizing removal are required.