Chapter 60. Efect of Fiber Properties on Mechanical Properties of Crystalline Silicon Carbide Composites
- Hua-Tay Lin,
- Mrityunjay Singh
Published Online: 26 MAR 2008
DOI: 10.1002/9780470294741.ch60
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
Hinoki, T., Snead, L.L., Lara-Curzio, E., Park, J. and Kohyama, A. (2008) Efect of Fiber Properties on Mechanical Properties of Crystalline Silicon Carbide Composites, 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.ch60
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:
- stoichiometric;
- isothermal;
- elasticity;
- mechanical properties;
- crystalline
Summary
Unidirectional SiC/SiC composites with three kinds of stoichiometric SiC fibers (Hi-NicalonTM Type-S, TyrannoTM SA and SCS-9ATM) and three kinds of fiber/matrix interphases (C, Multilayer C/SiC and ‘porous’ SiC), were prepared by isothermal chemical vapor infiltration. Tensile testing, double-notched specimen shear testing, single fiber push-out testing and transthickness tensile testing were carried out at ambient temperature to evaluate the mechanical properties of these materials. The microstructure and fracture surfaces of the test specimens evaluated were studied by scanning electron microscopy. Composites reinforced with SCS-9A fibers showed the highest ultimate tensile strength, more than 1 GPa, while the proportional limit stress of composites reinforced with Hi-Nicalon Type-S fibers was larger than that of the other composites. The composites reinforced with Tyranno SA fibers showed larger modulus of elasticity, although its fracture behavior was brittle due to the large interfacial shear strength and low fiber volume fraction. Among composites reinforced with the same fiber, those with multilayer C/SiC interphase showed brittle fracture behavior compared with the other composites due to large interfacial shear strength. The transthickness tensile strength of composites reinforced with Hi-Nicalon Type-S was larger than that of composites reinforced with Tyranno SA fibers, although the interlaminar shear strength of both materials determined by the compression of double-notched specimens was similar.