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Multilayered Oxide Interphase Concept for Ceramic‐Matrix Composites
Author(s) -
Lee Woo Y.,
LaraCurzio Edgar,
More Karren L.
Publication year - 1998
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1998.tb02396.x
Subject(s) - interphase , materials science , composite material , ceramic matrix composite , composite number , amorphous solid , ceramic , chemical vapor infiltration , oxide , ultimate tensile strength , monoclinic crystal system , deflection (physics) , chemical vapor deposition , metallurgy , nanotechnology , crystal structure , chemistry , genetics , physics , organic chemistry , optics , biology , crystallography
Hi‐Nicalon/SiC minicomposite specimens containing three oxide interphase layers (amorphous SiO 2 , monoclinic ZrO 2 , and amorphous SiO 2 ) were prepared by chemical vapor deposition. The minicomposites exhibited graceful composite failure behavior with reasonable load‐carrying capability in room‐temperature tensile tests. Much of the composite behavior and load‐carrying capability was retained even after matrix precracking and subsequent oxidation in air at 960°C for 10 h. In both the as‐prepared and oxidized specimens, crack deflection and fiber pull‐out occurred preferentially within the multilayered interphase region. The potential merits and uncertainties associated with this multilayered oxide interphase approach were discussed in the context of designing environmentally durable interfaces for ceramic‐matrix composites.