EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ISO 13383-1 testing. ISO 13383-1 describes manual measurement methods for determining the grain size of fine ceramics (advanced ceramics, advanced technical ceramics) using photomicrographs of polished and etched test pieces.
The methods described in ISO 13383-1 do not give the true mean grain diameter, but give a slightly smaller parameter depending on the method applied to analyze a two-dimensional section. The relationship to actual grain sizes depends on grain shape and the degree of microstructural anisotropy. ISO 13383-1 includes two basic methods, A and B.
Method A is the mean linear intersection technique. Method A1 is applicable to single-phase ceramics and ceramics with a basic crystalline phase and a glassy grain boundary phase of less than about 5% by volume, for which the shear count is sufficient. Method A2 applies to ceramics with more than about 5% by volume pores or secondary phases, or ceramics with more than one major crystalline phase, where individual interception lengths are measured, which can optionally be used to create a size distribution. This second method allows the pores or phases to be distinguished and the average linear intersection size to be calculated for each separately.
Method B is the average equivalent circle diameter method applicable to all types of ceramics with or without a secondary phase. This method can also be used to determine the grain aspect ratio and a size distribution.
Some users of this part of ISO 13383 may wish to apply automatic or semi-automatic image analysis to micrographs or directly captured microstructural images. This section allows for this, provided that the technique used simulates manual methods.
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