Chapter 8. Bonding and Fracture of Titanium-Containing Braze Alloys to Alumina

  1. John B. Wachtman Jr.
  1. Roger T. Cassidy1,
  2. Russell E. Pence1,
  3. William E. Moddeman1 and
  4. Anthony D. Buonaquisti2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470312568.ch8

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

Cassidy, R. T., Pence, R. E., Moddeman, W. E. and Buonaquisti, A. D. (1989) Bonding and Fracture of Titanium-Containing Braze Alloys to 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.ch8

Author Information

  1. 1

    Monsanto Research Corporation Mound, Miamisburg, OH 45342

  2. 2

    JEOL, USA, Inc. Peabody, MA 01960

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:

  • tensile strengths;
  • WDX;
  • migration;
  • brazing;
  • metallizing

Summary

Titanium-containing braze alloys were used to join both 94 and 99+% Al2O3 compositions. Resulting tensile strengths of 11–16 KSI compared favorably with conventional Mo-Mn metallizing. Extensive optical, scanning, WDX, and Auger analyses reveal the migration of titanium to the ceramic surface during brazing where it reacts with the copper of the braze alloy and forms an intermetallic of the approximate composition CuxTi (1.2 < x < 1.6). The presence of oxidized titanium, predominantly TiO2, was also detected near the interface. Examination of fractures samples indicates that fracture is occurring in the CaO · SiO2 glassy phase of the ceramic very near the braze layer.