本文件描述了二氧化铀（UO2）烧结球团的陶瓷制备，用于定性和定量微观结构检查。 这些检查可在热蚀刻或化学蚀刻前后进行。 它们使 -裂缝、粒间或粒内孔隙和包裹体的观察，以及 -测量孔隙和粒度，测量孔隙和粒度分布。 可使用ISO 2624或ASTM E112[3]，i.中所述的经典计数方法测量平均晶粒度。 e、 截取程序，与标准网格或参考照片进行比较。 孔径分布的测量通常由自动图像分析仪进行。如果还使用图像分析仪测量晶粒尺寸分布，建议使用热蚀刻来均匀显示整个样品中的晶粒结构。

This document describes the ceramographic preparation of uranium dioxide (UO2) sintered pellets for qualitative and quantitative microstructure examinations. These examinations can be carried out before and after thermal or chemical etching. They enable — observations of fissures, inter- or intra-granular pores and inclusions, and — measurement of pore and grain size and measurement of pore and grain size distributions. The measurement of average grain size can be carried out using a classical counting method as described in ISO 2624 or ASTM E112[3], i.e. intercept procedure, comparison with standard grids or reference photographs. The measurement of pore-size distributions is usually carried out by an automatic image analyser. If the grain-size distributions are also measured with an image analyser, it is recommended that thermal etching be used to reveal the grain structure uniformly throughout the whole sample.