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Journal of Materials Science

, Volume 26, Issue 8, pp 2229–2239 | Cite as

Microstructure property relationship in Pyrex glass composites reinforced with Nicalon fibres

  • S. M. Bleay
  • V. D. Scott
Papers

Abstract

Detailed microstructural studies have been carried out on a series of composites consisting of Pyrex glass reinforced with Nicalon fibres. A variety of techniques has been employed, including X-ray and electron diffraction, electron-probe microanalysis and thin foil analytical electron microscopy. In parallel, mechanical tests have been performed on the composites and measurements have been made of the fibre-matrix bond.

Substantial amounts of cristobalite have been identified in the matrix, up to ∼48% by volume in some cases. At such levels, microcracking is a common occurrence due to the high differential contraction between the matrix constituents upon cooling, which leads to matrix disintegration upon mechanical testing. A second microstructural feature which affects the mechanical behaviour of the composite concerns the fibre-matrix interface and, in particular, the chemistry of the outermost (∼200 nm) surface regions of the fibre. The amount of graphite here is shown to affect directly the strength of the fibre-matrix bond and, in turn, the degree of fibre pull out and the mechanical properties of the composite.

Keywords

Electron Diffraction Microstructural Feature Analytical Electron Microscopy Thin Foil Common Occurrence 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman and Hall Ltd. 1991

Authors and Affiliations

  • S. M. Bleay
    • 1
  • V. D. Scott
    • 1
  1. 1.School of Materials ScienceUniversity of BathClaverton DownUK

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