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High-strength graphite fibre/lithium aluminosilicate composites

Abstract

Graphite fibre/lithium aluminosilicate composites of matrix composition Li2O Al2O3·nSiO2 wheren=3, 4, and 8, have been developed with a high volume fraction of undirectionally aligned graphite fibres. Graphite fibre/ceramic matrix tapes were produced on a drumwinding apparatus and hot-pressed to final dimensions. This composite system exhibits a combination of useful properties, including high strength, low density, excellent thermal shock resistance and impact strength. Shear strength, cyclic modulus of rupture and modulus of elasticity and optical and electron microscopic evaluation of microstructure are discussed. Modulus of rupture as a function of vol % fibres was studied. The high modulus of rupture and impact strength are discussed in terms of the relative properties of fibre and matrix.

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Levitt, S.R. High-strength graphite fibre/lithium aluminosilicate composites. J Mater Sci 8, 793–806 (1973). https://doi.org/10.1007/BF00553730

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Keywords

  • Graphite
  • Al2O3
  • Shear Strength
  • Impact Strength
  • Thermal Shock