Title: Fractographic failure analysis of brittle materials

Authors: Jan Dusza

Addresses: Institute of Materials Research of the Slovak Academy of Sciences, 043 53 Kosice, Watsonova 47, Slovakia

Abstract: The fracture characteristics of two groups of brittle materials (structural ceramics and silicide based materials) produced by PM technology and developed for high-temperature applications are reviewed from the viewpoint of fractography. The main observation techniques and fracture-mechanical relations are summarised. The relationship between strength, fracture origins, defects and the relationship between fracture toughness and fracture micromechanisms and microstructure are described. The fractographic appearance of the high-temperature crack growth and creep failure is characterised. The possibilities for improving the fracture toughness and high-temperature properties are discussed.

Keywords: brittle materials; creep failure; fractography; fracture toughess; fracture; slow crack growth; strength.

DOI: 10.1504/IJMPT.2000.001249

International Journal of Materials and Product Technology, 2000 Vol.15 No.3/4/5, pp.292-255

Published online: 03 Jul 2003 *

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