The effect on the tensile properties of PIP-processed SiC/SiC composite of a chemical vapor-infiltrated SiC layer overlaid on the pyrocarbon interface layer

A chemical vapor-infiltrated (CVI) SiC layer is often deposited on the pyrocarbon (PyC) fiber–matrix interface layer in SiC fiber-reinforced SiC matrix (SiC/SiC) composites. It is normally applied to protect the PyC layer from reacting with molten Si or sintering aids during manufacturing, and to gu...

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Veröffentlicht in:Composites. Part A, Applied science and manufacturing Applied science and manufacturing, 2016-08, Vol.87, p.123-130
Hauptverfasser: Kotani, Masaki, Konaka, Kouji, Ogihara, Shinji
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container_title Composites. Part A, Applied science and manufacturing
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creator Kotani, Masaki
Konaka, Kouji
Ogihara, Shinji
description A chemical vapor-infiltrated (CVI) SiC layer is often deposited on the pyrocarbon (PyC) fiber–matrix interface layer in SiC fiber-reinforced SiC matrix (SiC/SiC) composites. It is normally applied to protect the PyC layer from reacting with molten Si or sintering aids during manufacturing, and to guard against the effects of high temperature, oxidation and moisture during use. In this study, we investigated the effect of this SiC layer on the tensile properties of a composite. Tensile tests of our composite samples showed the SiC layer to have no noticeable effects on its ultimate load or fracture strain, whereas it decreased the load-to-strain ratio and proportional limit. The test results were analyzed by carrying out element tests on filaments and fiber bundle samples, fracture mirror analysis of pullout fibers, and finite element analysis (FEA) of residual thermal stress around the interface.
doi_str_mv 10.1016/j.compositesa.2016.04.021
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subjects A. SiC fiber-reinforced SiC matrix (SiC/SiC) composites
B. chemical vapor-infiltrated (CVI) SiC layer
C. Tensile properties
Fiber composites
Filaments
Finite element method
Fracture mechanics
Moisture
Silicon carbide
Tensile properties
Tensile tests
title The effect on the tensile properties of PIP-processed SiC/SiC composite of a chemical vapor-infiltrated SiC layer overlaid on the pyrocarbon interface layer
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