Chapter 91. Fracture Strength and Crack Growth in Tubular Perovskite Membranes
- Hua-Tay Lin,
- Mrityunjay Singh
Published Online: 26 MAR 2008
DOI: 10.1002/9780470294741.ch91
Copyright © 2002 The American Ceramic Society
Book Title
26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3
Additional Information
How to Cite
Nagendra, N. and Bandhopadhyay, S. (2008) Fracture Strength and Crack Growth in Tubular Perovskite Membranes, in 26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3 (eds H.-T. Lin and M. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294741.ch91
Publication History
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 2002
Book Series:
ISBN Information
Print ISBN: 9780470375785
Online ISBN: 9780470294741
- Summary
- Chapter
- References
Keywords:
- tubular perovskite;
- intergranular;
- transgranular;
- C-ring specimen;
- appreciable
Summary
Fracture strength of tubular perovskite membranes was determined in three different atmospheric conditions: room temperature in air, at 1000d̀C in N2 and at 1000d̀C in CO2/CO gas mixtures. The strength of the membrane decreased with temperature and severity of reducing conditions although the strength distribution (Weibull parameter, m) was relatively unaltered. Surface and volume flaws dominated the fracture origins and the overall fracture was purely transgranular. Crack growth studies with Vickers indents as pre-starter flaws however, indicated a mixture of intergranular and transgranular fracture. The change in fracture mode provides useful insight on the microscopic-events controlling the strength and fracture in perovskite exposed to reducing environments.