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Influence of Interface Characteristics on the Mechanical Properties of Hi‐Nicalon type‐S or Tyranno‐SA3 Fiber‐Reinforced SiC/SiC Minicomposites
Author(s) -
Sauder C.,
Brusson A.,
Lamon J.
Publication year - 2010
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2010.02485.x
Subject(s) - materials science , composite material , fiber , ultimate tensile strength , coating , fiber type
The tensile behavior of CVI SiC/SiC composites with Hi‐Nicalon type‐S (Hi‐NicalonS) or Tyranno‐SA3 (SA3) fibers was investigated using minicomposite test specimens. Minicomposites contain a single tow. The mechanical behavior was correlated with microstructural features including tow failure strength and interface characteristics. The Hi‐NicalonS fiber‐reinforced minicomposites exhibited a conventional damage‐tolerant response, comparable to that observed on composites reinforced by untreated Nicalon or Hi‐Nicalon fibers and possessing weak fiber/matrix interfaces. The SA3 fiber‐reinforced minicomposites exhibited larger interfacial shear stresses and erratic behavior depending on the fiber PyC coating thickness. Differences in the mechanical behavior were related to differences in the fiber surface roughness.