This document describes the flash method for the determination of thermal diffusivity of ceramic matrix composites with continuous fibre reinforcement. In order to conform with the unidimensional heat transfer hypothesis, the experimental conditions are defined such that the material behaves in a homogeneous manner. This involves performing tests in one symmetry axis of the composite. The method is applicable to materials which are physically and chemically stable during the measurement, and covers the range of temperature from 100 K to 2 800 K. It is suitable for the measurement of thermal diffusivity values in the range 10−4 m2∙s−1 to 10−7 m2∙s−1.
This document describes the flash method for the determination of thermal diffusivity of ceramic matrix composites with continuous fibre reinforcement.
In order to conform with the unidimensional heat transfer hypothesis, the experimental conditions are defined such that the material behaves in a homogeneous manner. This involves performing tests in one symmetry axis of the composite.
The method is applicable to materials which are physically and chemically stable during the measurement, and covers the range of temperature from 100 K to 2 800 K. It is suitable for the measurement of thermal diffusivity values in the range 10−4 m2∙s−1 to 10−7 m2∙s−1.
Le présent document décrit la méthode par flash laser permettant de déterminer la diffusivité thermique des composites à matrice céramique renforcée de fibres continues. Les conditions expérimentales sont telles que le matériau se comporte de manière homogène dans chacun de ses axes d'anisotropie et que le transfert de chaleur ne se produit que par conduction thermique. Cette méthode s'applique aux matériaux qui sont physiquement et chimiquement stables pendant le mesurage et couvre le domaine de température compris entre 100 K et 2 800 K. elle permet de mesurer des valeurs de diffusivité thermique dans la plage comprise entre 10-4 m2 s-1 et 10-7 m2 s-1.
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