Chapter 78. High-Temperature Mechanical Properties of Cr3+-Doped Sapphire Fibers
- Hua-Tay Lin,
- Mrityunjay Singh
Published Online: 26 MAR 2008
DOI: 10.1002/9780470294741.ch78
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
Cancapa, J. J. Q., De Arellano Löpez, A. R. and Sayir, A. (2008) High-Temperature Mechanical Properties of Cr3+-Doped Sapphire Fibers, 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.ch78
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:
- tensile;
- scanning electron microscopy (SEM);
- alumina;
- mechanical properties;
- fabrication
Summary
High-temperature slow-crack growth of c-axis single crystal 10 wt% Cr2O3 - Al2O3 (nominal composition) fibers has been studied by tensile rupture experiments at 1400d̀C, under different stressing rates (0.37 to 41.5 MPa.s-1). Slow-crack growth appears to be less pronounced with increasing Cr2O3. Rupture stresses increased with the stressing rate from 397 MPa to 515 MPa, resulting in a SCG exponent, N=19. The Cr2O3 composition was analyzed by Energy Dispersed X-Ray Spectra (EDS) and fracture surfaces were studied by scanning electron microscopy (SEM). Results are compared with previous studies on 100–300 ppm Cr3+ doped sapphire fibers and on commercial sapphire fibers.