32. Ballistic Properties of Pressureless Sintered SiC/TiB2 Composites

  1. Jeffrey J. Swab
  1. Henry Chu1,
  2. T. M. Lillo2,
  3. B. Merkle3,
  4. D. W. Bailey3 and
  5. M. Harrison3

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291276.ch32

Advances in Ceramic Armor: A Collection of Papers Presented at the 29th International Conference on Advanced Ceramics and Composites, January 23-28, 2005, Cocoa Beach, Florida, Ceramic Engineering and Science Proceedings, Volume 26, Number 7

Advances in Ceramic Armor: A Collection of Papers Presented at the 29th International Conference on Advanced Ceramics and Composites, January 23-28, 2005, Cocoa Beach, Florida, Ceramic Engineering and Science Proceedings, Volume 26, Number 7

How to Cite

Chu, H., Lillo, T. M., Merkle, B., Bailey, D. W. and Harrison, M. (2005) Ballistic Properties of Pressureless Sintered SiC/TiB2 Composites, in Advances in Ceramic Armor: A Collection of Papers Presented at the 29th International Conference on Advanced Ceramics and Composites, January 23-28, 2005, Cocoa Beach, Florida, Ceramic Engineering and Science Proceedings, Volume 26, Number 7 (ed J. J. Swab), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291276.ch32

Author Information

  1. 1

    Idaho National Engineering and Environmental Laboratory Mail stop 0325, PO Box 1625 Idaho Falls, ID 83415 USA

  2. 2

    Idaho National Engineering and Environmental Laboratory Mail stop 2218, P.O. Box 1625 Idaho Falls, ID 83415 USA

  3. 3

    Superior Graphite Company 4059 Calvin Drive Hopkinsville, KY 42240 USA

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2005

ISBN Information

Print ISBN: 9781574982374

Online ISBN: 9780470291276

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Keywords:

  • ceramics;
  • silicon carbide;
  • mixing techniques;
  • pressure-assisted densification (PAD);
  • microstructure

Summary

Pressureless sintering of ceramics for armor applications offers the potential of greatly reduced cost and increased production volume. Previously it was shown that pure SiC could be made by pressureless sintering while achieving a ballistic performance slightly less than commercial SiC made by pressure-assisted densification (PAD). Additions of titanium diboride were made to pin the SiC grain size during pressureless sintering to achieve a final grain size closer to that found in PAD SiC and achieve improved ballistic performance. Silicon carbide/titanium diboride composites of various compositions were blended by various means, consolidated and pressureless sintered to near theoretical density. Additions of TiB2 were ≤10% by volume and increased the density of the material by less than 3% over that of pure SiC. Variations in the mixing techniques yielded composites with a range of TiB2 particle sizes. TiB2 additions hindered SiC grain growth and the formation of elongated grains during high temperature pressureless sintering. The microstructure of the composites is documented and compared to commercially available SiC material. The SiC/TiB2 composites demonstrated improved ballistic properties in Depth-of-Penetration (DOP) tests over pure, pressureless-sintered SiC material and approach that of SiC made by hot pressing.