Investigation of atmospheric moisture during heat treatment of glass fibres

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The tensile strength of single water-sized E-glass fibres that were thermally conditioned, either in air or under vacuum, was investigated. The vacuum removed water from the conditioning atmosphere, as well as the fibre surfaces, at room temperature but retained tensile strength of fibres treated in the absence of water were not significantly different from those thermally conditioned in a standard air furnace. The results suggest that water, either in the treatment atmosphere or on the surface of the fibres, is not a significant factor in fundamental glass fibre strength loss at an elevated temperature. It may, therefore, be necessary to consider alternative theories to explain this strength loss.

Original languageEnglish
Article number27
Number of pages8
Issue number4
Publication statusPublished - 1 Apr 2019


  • glass fibres
  • thermal conditioning
  • strength loss
  • stress corrosion reaction
  • crack tip shielding

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