28. Static and Dynamic Fracture Behavior of Layered Alumina Ceramics

  1. Jeffrey J. Swab
  1. Zeming He1,
  2. J. Ma1,
  3. Hongzhi Wang1,
  4. G. E. B. Tan2,
  5. Dongwei Shu3 and
  6. Jian Zheng3

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291276.ch28

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

He, Z., Ma, J., Wang, H., Tan, G. E. B., Shu, D. and Zheng, J. (2005) Static and Dynamic Fracture Behavior of Layered Alumina Ceramics, 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.ch28

Author Information

  1. 1

    School of Materials Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore

  2. 2

    DSO National Laboratories, 20 Science Park Drive, Singapore 118230, Singapore

  3. 3

    School of Mechanical and Production Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore

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;
  • dynamic mechanical properties;
  • porosity;
  • fracture toughness;
  • brittleness

Summary

The preparation of ceramics in the configuration of layered system with weak interfaces is one of the simple ways to achieve tough ceramic components. In the present work, alumina ceramics with alternately dense and porous layers were produced via a tape casting and sintering process. The static and dynamic mechanical properties of the layered systems were characterized, analyzed, and compared with those of monolithic alumina. The effects of the porosity in the porous layer and the strain rate during impact on materials fracture behavior were also investigated. From static test, it could be known that the fracture energy increased with the porosity, and an enhancement on fracture toughness was shown in the prepared layered system. From dynamic test, it was noted that the yield stress of the system increased with increasing the strain rate at a fixed porosity, and for the layered system at a given strain rate, as the porosity increased, the plateau region prolonged and the yield stress decreased.