• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Inorganic materials: applied research >Peculiarities of Application of the Gas Extraction Method for Determination of Hydrogen Content in Samples of Irradiated Zirconium Materials
【24h】

Peculiarities of Application of the Gas Extraction Method for Determination of Hydrogen Content in Samples of Irradiated Zirconium Materials

机译：辐射锆材料样品中氢含量法测定氢气含量的特性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Results of multiycar research of zirconium materials from nuclear reactors show that the hydrogen content measured by a high-temperature extraction method does not always correlate with the number and size of zirconium hydrides measured by metallography. Additional examinations found that hydrogen is contained not only in the metal but also in the oxide film of samples under examination. This means that the level of hydrogenation of zirconium materials under irradiation should be estimated by the hydrogen content in metal only to allow for a correct comparison of the results of gas analysis and metallographic investigations. In this connection, the hydrogen content was measured separately in the metal and in the oxide film. A device to mechanically remove sediments and oxide film from samples was developed. However, when removing the oxide mechanically, a top layer of metal is also removed, as a rule, which leads to an uncontrolled increase in the measurement error because of a nonuniform distribution of hydrides in the metal. The assessment of the contribution of oxide hydrogen using a curve "total hydrogen content vs. oxide film thickness" showed no distinct dependence. Moreover, it was stated that the results of the total hydrogen content measurements by the high-temperature extraction method can be affected by the elementary composition of sediments and oxide films on the surfaces of spent items. The performed research resulted in the development of a technique to measure the hydrogen mass fraction by high-temperature extraction in an inert gas flow separately in the metal and oxide film without any preliminary mechanical removal of the oxide. This will allow examining the dependence between the hydrogen content in the oxide film and its thickness, as well as estimating a possible correlation between the hydrogen mass fraction in the metal and the quantitative characteristics of hydrides measured by a metallographic image.
机译：来自核反应堆锆材料的多重卡研究结果表明，通过高温提取方法测量的氢含量与通过金相测量测量的氮锆的数量和尺寸并不总是相关的。另外的考试发现氢不仅含有金属，还包含在检查的样品的氧化物薄膜中。这意味着应通过金属中的氢含量估算照射下锆材料的氢化水平仅允许对气体分析和金相研究结果进行正确的比较。在这方面，氢含量分别在金属和氧化物膜中测量。开发了一种机械地去除样品的沉积物和氧化膜的装置。然而，当机械地除去氧化物时，通常也除去顶层金属，这是一种规则，这导致测量误差的不受控制的增加，因为金属中的氢化物的不均匀分布。使用曲线“总氢含量与氧化物膜厚度”的氧化物氢的贡献的评估显示出没有明显的依赖性。此外，据说高温提取方法的总氢含量测量结果可以受花样表面上的沉积物和氧化膜的基本组成的影响。所进行的研究导致在金属和氧化物膜中分别在金属和氧化物膜中分别在惰性气体中测量氢质量级分的技术，而没有任何初步的机械除去氧化物的技术。这将允许检查氧化物膜中的氢含量及其厚度之间的依赖性，以及估计金属中的氢质量分数与通过金属图像测量的氢化物的定量特征之间的可能相关性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号