铅铋合金气相氧含量控制初步实验研究  

Preliminary Experiment Study on Control of Oxygen Concentration via Gas Phase in Liquid Lead-Bismuth Alloy

作　　者：秦博[1] 付晓刚[1] 马浩然[1] 张金权[1] 任丽霞[1] 龙斌[1] QIN Bo;FU Xiaogang;MA Haoran;ZHANG Jinquan;REN Lixia;LONG Bin(China Institute of Atomic Energy,Beijing 102413)

机构地区：[1]中国原子能科学研究院

出　　处：《材料导报》2019年第11期1821-1824,共4页Materials Reports

基　　金：国家自然科学基金(91426301)~~

摘　　要：由于铅铋共晶合金(LBE)对结构材料具有较强的腐蚀性,为了防止PbO的析出和形成一层稳定的Fe3O4保护层,LBE中的氧需要控制在一个特定的范围内。本研究基于气相氧控的原理,设计和构建了铅铋合金气相氧控静态高温试验装置,用于铅铋合金气相氧控技术研究。初步实验结果显示:氧传感器电动势随着LBE覆盖气体中H2/H2O比(体积比)的增大而升高且响应快速,表明LBE中氧的含量逐渐降低;对特定的H2/H2O比,LBE中氧含量能够稳定在一个特定的范围。因此,通过控制和调节LBE覆盖气体中H2/H2O比可以实现将LBE中的氧含量控制在一个特定的范围。该技术有望应用于铅铋合金与结构材料的相容性实验中,以及在液态铅铋动态回路中用于铅铋合金中氧含量的控制。In order to avoid the precipitation of PbO and form a stable Fe3O4 protective layer, the oxygen in lead-bismuth eutectic (LBE) alloy need be controlled in a certain range due to the heavy corrosion of LBE on structural materials. In this study, based on the principle of oxygen control via gas phase, an oxygen control facility for stagnant LBE is designed and assembled used to investigate the gas oxygen control technology. The preliminary test results show that the eletromotive force (EMF) of oxygen sensor increases with the increment of the H2/H2O ratio in volume, indicating the decreases of oxygen concentration in LBE, and that at a specific H2/H2O ratio the oxygen concentration can be stabilized at a certain level. Therefore, through controlling and adjusting the H2/H2O ratio in cover gas of LBE, the oxygen concentration can be controlled in a certain range. This technique is expected to be used for the oxygen concentration control in the compatibility tests of LBE with structural materials and LBE dynamic loops.

关 键 词：铅铋共晶合金 气相氧控 氧传感器 H2/H2O比 

分 类 号：TL34[核科学技术—核技术及应用]