Chapter 72. Effects of Material Removal Process on the High-Temperature Performance of an Oxide-Matrix CFCC

  1. J. P. Singh
  1. K. R. Fehlmann and
  2. M. G. Jenkins

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294437.ch72

Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 18, Issue 3

Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 18, Issue 3

How to Cite

Fehlmann, K. R. and Jenkins, M. G. (1997) Effects of Material Removal Process on the High-Temperature Performance of an Oxide-Matrix CFCC, in Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 18, Issue 3 (ed J. P. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294437.ch72

Author Information

  1. Department of Mechanical Engineering University of Washington Seattle, WA 98195–2600

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1997

ISBN Information

Print ISBN: 9780470375495

Online ISBN: 9780470294437

SEARCH

Keywords:

  • water jet cutting;
  • tensile tests;
  • mechanical properties;
  • room-temperature strength;
  • thermal-aging

Summary

Conventional diamond-grit cutting and grinding and non conventional abrasive water jet cutting (AWJ) were used to fabricate tensile specimens of a Nicalon™ fibre-reinforced Al2O3 matrix composite with a duplex, oxidation-resistant BN/SiC interphase. Tensile tests at room temperature of as-received specimens showed insignificant differences between the mechanical properties and performance of diamond-grit cut/ground and AWJ-cut specimens. In addition, tensile tests at room temperature conducted on specimens which had been exposed to 800 and 1000°C temperatures in ambient air for 24-h also showed no differences in mechanical properties and performance between diamond-grit cut/ground and AWJ-cut specimens. Specimens fabricated using both processes lost up to 55% of their room-temperature strength and strain to failure after such exposures. Fractography revealed brittle behavior (no fibre debonding and pullout) for exposed specimens and “toughening” behavior such as fibre debonding and pullout for unexposed specimens. Finally, tensile tests at 800 and 1000° C (total exposure time at temperature <30 min) of as-received specimens showed insignificant differences between the mechanical properties and performance of diamond-grit cut/ground and AWJ-cut specimens with good high temperature properties and performance, thus indicating the possible susceptibility of this material to “thermal-aging” in oxidative environments.