Chapter 31. Effect of Surface Grinding Conditions on Strength of Alumina/Niobium Joint

  1. John B. Wachtman Jr.
  1. K. Suganuma1,
  2. T. Okamoto1,
  3. M. Koizumi1 and
  4. S. Gohda2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470312568.ch31

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

Suganuma, K., Okamoto, T., Koizumi, M. and Gohda, S. (1989) Effect of Surface Grinding Conditions on Strength of Alumina/Niobium Joint, 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.ch31

Author Information

  1. 1

    The Institute of Scientific and Industrial Research Osaka University Mihogaoka 8–1, Ibaraki Osaka 567, Japan

  2. 2

    Faculty of Science and Technology Kinki University Kowakae 3–4–1, Higashi-Osaka Osaka 577, Japan

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:

  • alumina;
  • optimized;
  • influence;
  • polycrystal;
  • dimensions

Summary

Strength of a solid-state bonded alumina/niobium joint was evaluated as a function of bond face grinding conditions. Bonding was carried out at 1773 K under a pressure of 20 MPa for 1 h by vacuum hot-pressing. The rougher bond face of alumina made the joint weaker while the rougher bond face of niobium made it stronger. These effects can be explained partly by the fact that the ratio of unjoined area on the interface changed with the changes in the roughness of both bond faces. The rougher face of the niobium side reduced the unjoined area while the rougher face of the aluminum increased it. In addition, the rough face of niobium eliminated the unjoined band area, which is sometimes formed along the free surface inevitably in a solid-state bonding process.