ISO 16793:2018 核燃料技术 微细结构检验用UO₂烧结球ceramographic制备的指南

标准编号：ISO 16793:2018

中文名称：核燃料技术 微细结构检验用UO₂烧结球ceramographic制备的指南

英文名称：Nuclear fuel technology — Guidelines for ceramographic preparation of UO2 sintered pellets for microstructure examination

发布日期：2018-08

标准范围

This document describes the ceramographic preparation of uranium dioxide (U2O ) 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 , 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.

标准预览图