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Fiber Effects on Minicomposite Mechanical Properties for Several Silicon Carbide Fiber: Chemically Vapor-Infiltrated Silicon Carbide Matrix SystemsSeveral different types of SiC fiber tows were coated with BN and composited using chemically vapor-infiltrated SiC to form single-tow minicomposites. The types of SiC fiber included Nicalon(sup TM), Hi-Nicalon(sup TM), and the new Sylramic(sup TM) polycrystalline SiC fiber. The interfacial shear stresses were determined from unload-reload tensile hysteresis-loop tests. The ultimate stress and strain properties also were determined for the minicomposites. The ultimate strengths of the newer Hi-Nicalon and Sylramic fibers were superior to that of Nicalon minicomposites with similar fiber volume fractions. The Sylramic minicomposites had the lowest strain to failure and highest interfacial shear strength, respectively, because of the high modulus of the fiber and the rough surface of this fiber type. The apparent interfacial shear strength increased as the stress increased for the Sylramic minicomposites, which also was attributed to the surface roughness of this fiber.
Document ID
20000057436
Document Type
Reprint (Version printed in journal)
Authors
Morscher, Gregory N. (NASA Lewis Research Center Cleveland, OH United States)
Martinez-Fernandez, Julian (Seville Univ. Spain)
Date Acquired
August 19, 2013
Publication Date
January 1, 1999
Publication Information
Publication: Journal of the American Ceramic Society
Volume: 82
Issue: 1
Subject Category
Nonmetallic Materials
Funding Number(s)
PROJECT: RTOP 523-21-13
CONTRACT_GRANT: NCC3-404
Distribution Limits
Public
Copyright
Other