Chapter 56. Transformation Toughening of a Calcium Zirconate Matrix by Dicalcium Silicate, Under Ballistic Impact

  1. Waltraud M. Kriven and
  2. Hua-Tay Lin
  1. W. M. Kriven1,
  2. B. R. Rosczyk1 and
  3. K. Kremeyer2

Published Online: 27 MAR 2008

DOI: 10.1002/9780470294802.ch56

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: A: Ceramic Engineering and Science Proceedings, Volume 24, Issue 3

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: A: Ceramic Engineering and Science Proceedings, Volume 24, Issue 3

How to Cite

Kriven, W. M., Rosczyk, B. R. and Kremeyer, K. (2003) Transformation Toughening of a Calcium Zirconate Matrix by Dicalcium Silicate, Under Ballistic Impact, in 27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: A: Ceramic Engineering and Science Proceedings, Volume 24, Issue 3 (eds W. M. Kriven and H.-T. Lin), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294802.ch56

Author Information

  1. 1

    University of Illinois, Urbana, IL

  2. 2

    The University of Arizona, Tucson, AZ

Publication History

  1. Published Online: 27 MAR 2008
  2. Published Print: 1 JAN 2003

ISBN Information

Print ISBN: 9780470375839

Online ISBN: 9780470294802

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Keywords:

  • ceramic materials;
  • aluminum oxide ceramic;
  • triaxial compression;
  • uniaxial strain;
  • aluminum oxide

Summary

Preliminary investigations have been made on toughening ceramic armor materials by inducing large volume change phase transformations in ceramics. Such transformations cannot be induced by a normal, slow crack growth mechanism such as occurs in zirconia, but requires an exceedingly high activation energy barrier to be overcome. We have developed a procedure for evaluating mechanical behavior under both quasi-static and dynamic loading conditions. The failure modes under quasi-static loading conditions were observed to be non-catastrophic. Preliminary results suggest that dicalcium silicate (Ca2SiO4) dispersed in a calcium zirconate (CaZrO3) matrix material increases the toughness of the material. It is thought that the energy of ballistic impact is able to overcome the prohibitively, high activation energy barrier to nucleate the orthorhombic to monoclinic transformation in Ca2SiO4 which is accompanied by an ∼12% volume increase at 490°C.