The fracture behaviour of SiC reinforced SiAlYON ceramic matrix composites

E. KASPRZAK; Y. BARBAUX

doi:doi:10.1051/jp4:19937307

Issue		J. Phys. IV France Volume 03, Number C7, Novembre 1993 The 3rd European Conference on Advanced Materials and Processes Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés


Page(s)		C7-1923 - C7-1926
DOI		https://doi.org/10.1051/jp4:19937307

The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés

J. Phys. IV France 03 (1993) C7-1923-C7-1926
DOI: 10.1051/jp4:19937307

The fracture behaviour of SiC reinforced SiAlYON ceramic matrix composites

E. KASPRZAK and Y. BARBAUX

Aerospatiale, Centre Commun de Recherches Louis Blériot, BP. 76, 92152 Suresnes cedex, France

Abstract
This paper presents the results of a study carried out at the AEROSPATIALE Joint Research Center on SiAlYON Matrix Composites reinforced with 0, 10, 20 and 30% of SiC whiskers. Firstly the test methodology for measuring the K1c is described. The SENB (Single Edge Notched Beam) specimen pre-cracked in compression cycling is compared to the Chevron Notched bend bar test. In both cases the fracture toughness is measured in a bend test more adapted for tests at elevated temperatures. Then the crack propagation at elevated temperature of the composite for the four SiCw volume fractions is described and discussed in relationship with the rheological behaviour of the matrix and the volume fraction of reinforcement. Keywords : Ceramic Matrix Composites - SiC - Whisker - SiAlYON - Fracture Behaviour