NF EN ISO 19629

Fine ceramics (advanced ceramics, advanced technical ceramics) — Thermophysical properties of ceramic composites — Determination of unidimensional thermal diffusivity by flash method

Le présent document décrit la méthode flash utilisée pour déterminer la diffusivité thermique de composites à matrice céramique renforcés de fibres continues. Pour se conformer à l''hypothèse de transfert de chaleur unidimensionnel, les conditions expérimentales sont définies de sorte que le matériau se comporte de manière homogène. Cela implique de réaliser les mesures dans un axe de symétrie du composite. La méthode s''applique aux matériaux qui sont physiquement et chimiquement stables lors de la mesure et couvre la plage de température allant de 100 K à 2 800 K. Elle est adaptée à la mesure des valeurs de diffusivité thermique situées dans la plage de 10-4 m2s-1 à 10-7 m2s-1.

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