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Mechanical properties and fracture behavior of fibrous Al2O3/SiC ceramics

Authors
Journal
Journal of the European Ceramic Society
0955-2219
Publisher
Elsevier
Publication Date
Volume
20
Issue
12
Identifiers
DOI: 10.1016/s0955-2219(00)00067-4
Keywords
  • Al2O3–Sic
  • Composites
  • Fibres
  • Fracture
  • Mechanical Properties

Abstract

Abstract Fibrous Al 2O 3 ceramics with a mixture of SiC and Al 2O 3 as the cell boundaries were fabricated by extrusion-molding and hot-pressing techniques. The effects of the cell boundary composition on the mechanical properties and fracture behavior are investigated. It is shown that a 65:35 mixture of SiC:Al 2O 3 can act as a suitable cell boundary for Al 2O 3 cells. In bending tests, such a ceramic displays a non-catastrophic fracture behavior with reasonable load-carrying capability, and its fracture energy and apparent toughness are up to 1349 J/m 2 and 6.0 MPa m 1/2, respectively.

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