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Title: Preparation & characterization of SiO{sub 2} interface layer by dip coating technique on carbon fibre for C{sub f}/SiC composites

Carbon fibres (C{sub f}) are one of the most important reinforced materials for ceramic matrix composites such as C{sub f} - SiC composites and they are generally sought for high temperature applications in as space application, nuclear reactor and automobile industries. But the major problem arise when C{sub f} reinforced composites exposed to high temperature in an oxidizing environment, C{sub f} react with oxygen and burnt away. In present work, we have studied the effect of silica (SiO{sub 2}) coating as a protective coating on C{sub f} for the C{sub f} / SiC composites. The silica solution prepared by the sol-gel process and coating on C{sub f} is done by dip coating technique with varying the withdrawing speed i.e. 2, 5, 8 mm/s with fixed dipping cycle (3 Nos.). The uniform silica coating on the C{sub f} is shown by the Scanning Electron Microscope (SEM) analysis. The tensile test shows the increase in tensile strength with respect to increase in withdrawing speed. The isothermal oxidation analysis confirmed enhancement of oxidation resistance of silica coated C{sub f} as compared tothe uncoated C{sub f}.
Authors:
 [1] ;  [2] ; ; ; ;  [1]
  1. Fusion Reactor Material Development & Characterization Division, Institute for Plasma Research, GIDC Electronics Estate, Sector-25, Gandhinagar-382016 (India)
  2. (India)
Publication Date:
OSTI Identifier:
22488805
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1675; Journal Issue: 1; Conference: AMRP-2015: 4. national conference on advanced materials and radiation physics, Longowal (India), 13-14 Mar 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CARBON FIBERS; CERAMICS; COMPARATIVE EVALUATIONS; COMPOSITE MATERIALS; DIP COATING; INTERFACES; LAYERS; MATRIX MATERIALS; OXIDATION; REINFORCED MATERIALS; SCANNING ELECTRON MICROSCOPY; SILICA; SILICON CARBIDES; SILICON OXIDES; SOL-GEL PROCESS; TENSILE PROPERTIES