This European prestandard describes two methods for determination of the bulk density and apparent porosity of ceramic matrix composites with fibrous continuous reinforcement (ID. 2D. 3D).
Two methods are described and are designated as Methods A and B. as follows:
- Method A: Determination of bulk density only, by measurement of dimensions and mass
- Method B: Determination of bulk density and apparent porosity by liquid displacement
Method B is suitable for the determination of the apparent or open porosity of material. but is not suitable for materials which are known to have an average pore size of greater than 200 um.
The two methods do not measure the same propertjes and do not give equivalent test results. Corresponding methods for monolithic ceramics are given in EN 623-2.
DS/ENV 1389:1994 history
1994DS/ENV 1389:1994 Advanced technical ceramics. Ceramic composites. Physical properties. Determination of density and apparent porosity