Numéro
J. Phys. IV France
Volume 03, Numéro C7, Novembre 1993
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
Page(s) C7-1883 - C7-1888
DOI http://dx.doi.org/10.1051/jp4:19937301
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) C7-1883-C7-1888

DOI: 10.1051/jp4:19937301

Thermal fatigue of fibrous ceramic matrix composites

M.L. BOUCHETOU, M. HUGER and C. GAULT

Laboratoire Matériaux Céramiques et Traitements de Surface, URA 320 du CNRS, Ecole Nationale Supérieure de Céramique Industrielle, 47 à 73 Avenue Albert Thomas, 87065 Limoges, France


Abstract
This paper is devoted to the study of 2D SiC/C/SiC composites which are subjected to thermal cycling. Previous work has already shown that variation in Young's modulus can be used to monitor damage in ceramic-ceramic composites. Samples were rapidly heated by moving them up into a tubular furnace and rapidly cooled by moving them down through a gas flow, which can be either air or Ar-H2. After each thermal cycle, the uniaxial Young's modulus was measured by an ultrasonic method. The results show that a regular decrease of Young's modulus is observed in air up to 100 cycles, though it remains constant in Ar-H2. In comparison to isothermal ageing, the effects of thermal cycling on oxidation mechanisms are discussed.



© EDP Sciences 1993