Chapter 26. Comparison of Strengths of Active Metal Brazements in Alumina and SiC Whisker-Reinforced Alumina

  1. John B. Wachtman Jr.
  1. A. J. Moorhem and
  2. Hyoun-Ee Kim

Published Online: 26 MAR 2008

DOI: 10.1002/9780470312568.ch26

Proceedings of the International Forum on Structural Ceramics Joining: Ceramic Engineering and Science Proceedings, Volume 10, Issue 11/12

Proceedings of the International Forum on Structural Ceramics Joining: Ceramic Engineering and Science Proceedings, Volume 10, Issue 11/12

How to Cite

Moorhem, A. J. and Kim, H.-E. (1989) Comparison of Strengths of Active Metal Brazements in Alumina and SiC Whisker-Reinforced Alumina, in Proceedings of the International Forum on Structural Ceramics Joining: Ceramic Engineering and Science Proceedings, Volume 10, Issue 11/12 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470312568.ch26

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1989

ISBN Information

Print ISBN: 9780470374887

Online ISBN: 9780470312568

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Keywords:

  • composite;
  • brazing;
  • Ti;
  • Sic;
  • structural

Summary

Silicon carbide whisker-reinforced alumina composite and monolithic alumina were brazed with two experimental brazing filler metals that contain titanium to promote wetting and adherence. The flexural strengths of the brazements were determined at temperatures up to 600°C, and the room temperature strengths were measured after aging in air for 100 h at 200°, 400°, and 600°C. Very strong joints were produced in both ceramics. The joints in the composite were much stronger at 200° and 400°C, but comparable to those in alumina at 600°C. The brazements in alumina were unaffected by the aging treatment, but those in the composite lost 50% of their room temperature strength on aging at 600°C, probably as a result of reactions between Ti in the filler metal and the SiC whiskers.