Le présent document décrit deux méthodes de détermination de la masse volumique apparente et de la porosité apparente des composites à matrice céramique à renfort fibreux. Deux méthodes sont décrites et sont désignées par méthodes A et B comme suit : - méthode A : Détermination de la seule masse volumique apparente par mesurage des dimensions et de la masse ; - méthode B : Détermination de la masse volumique apparente et de la porosité apparente par immersion dans un liquide. La méthode B n'est pas applicable à la détermination de la porosité apparente ou ouverte de matériaux connus pour avoir des pores de taille supérieure à 200 mu m.
Ce document définit deux méthodes de détermination de la masse volumique apparente et de la porosité apparente des composites à matrice céramique à renfort fibreux continu (1D, 2D, 3D).
This document specifies methods for the determination of the apparent solid density, bulk density, apparent porosity and geometric bulk density of fine ceramics, including all ceramic matrix composites. Two methods are described and are designated as Methods A and B, as follows: ? Method A: Determination of bulk density, apparent solid density and apparent porosity by liquid displacement (Archimedes' method). NOTE 1 This method is not appropriate for the determination of an apparent porosity greater than 10 %. For materials with higher porosity, the accuracy of the measurement might not be satisfactory. This method might also not give a satisfactory open porosity result if it is less than 0,5 %. NOTE 2 This method is also not suitable for materials which are known to have an average pore size of greater than 600 µm. ? Method B: Determination of bulk density only, by measurement of geometric dimensions and mass.
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