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Journal of Materials Science

, Volume 32, Issue 8, pp 2031–2035 | Cite as

Preparation and mechanical properties of high-purity Al2O3 fibre/Al2O3 matrix composite

  • K UENO
  • T INOUE
  • T MITSUHATA
Article

Abstract

Al2O3 matrix composites with unidirectionally oriented high-purity Al2O3 fibre with and without carbon coating, were fabricated by the filament-winding method, followed by hot-pressing at 1573–1773 K. The composite with non-coated Al2O3 fibre exhibited a bending strength (594 MPa) comparable to that of monolithic Al2O3 (589 MPa). While the composite with a carbon-coated fibre had lower strength (477 MPa), it showed improved fracture toughness (6.5 MPa m1/2) compared to the composite with an uncoated fibre (4.5 MPa m1/2) and monolithic Al2O3 (5.5 MPa m1/2). This toughness enhancement was explained based on the increased crack extension resistance caused by the fibre pull-out observed by SEM at the notch tip.

Keywords

Carbon Coating Matrix Interface Improve Fracture Toughness Toughness Enhancement Al2O3 Fibre 

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Copyright information

© Chapman and Hall 1997

Authors and Affiliations

  • K UENO
    • 1
  • T INOUE
    • 1
  • T MITSUHATA
    • 2
  1. 1.Osaka National Research InstituteIkeda OsakaJapan
  2. 2.Osaka Electro-Communication UniversityNeyagawaJapan

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