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The use of a δ-alumina fibre for metal-matrix composites

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Abstract

Composites formed by infiltration of an array of fine alumina fibres with aluminium alloy melts have been investigated in terms of fabrication characteristics, microstructural features and mechanical properties. A production method has been developed in which the application of pressure ensures very low porosity levels and strong fibre-matrix bonding. Details of the transport phenomena occurring during fabrication have been explored with a view to optimizing selection of applied pressure, thermal fields, alloy composition and the structure of the fibrous preform. Microstructural examinations revealed an intimate fibre-matrix bond, but the virtual absence of any chemical reaction at the interface. Comparison of property measurements with data from unreinforced alloys revealed increased elastic moduli and marked improvement in tensile strength at elevated temperature, accompanied by reductions in elongation.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, University of Surrey, Guildford, Surrey, UK

    T. W. Clyne, M. G. Bader, G. R. Cappleman & P. A. Hubert

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  1. T. W. Clyne
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  2. M. G. Bader
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  3. G. R. Cappleman
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  4. P. A. Hubert
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Clyne, T.W., Bader, M.G., Cappleman, G.R. et al. The use of a δ-alumina fibre for metal-matrix composites. J Mater Sci 20, 85–96 (1985). https://doi.org/10.1007/BF00555902

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  • DOI: https://doi.org/10.1007/BF00555902

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