摘要
液态铅铋合金(LBE)是加速器驱动次临界系统(ADS)重要的散裂靶材料和冷却剂候选材料,也是先进快中子堆的重要冷却剂材料.由于LBE会对结构材料产生强烈的腐蚀,因此LBE的应用需要优先解决高温下LBE与结构材料的相容性问题.这里报道了ADS候选结构材料316L和T91不锈钢样品在550℃静态LBE中腐蚀1 000h的实验研究.利用扫描电子显微镜表征了腐蚀后的样品横截面的显微结构形貌,通过EDS面扫描分析了LBE/基体界面处主要元素分布.结果表明,两种样品都遭受了强烈的元素溶解与LBE渗透腐蚀,T91比316L表现出了略好的抗LBE腐蚀性能.
Liquid lead-bismuth eutectic(LBE)is an important spallation target material and coolant candidate in accelerator driven sub-critical systems(ADS),and is also a key coolant material for advanced fast reactors.Since LBE has a strong corrosion for structural materials,its application is required to give priority to the problem of compatibility between LBE and structural materials at high temperatures.Experiments were conducted on the corrosion behavior of the two ADS candidate structural materials(316Land T91 stainless steels)in static LBE at 550 ℃for 1000 h.The microstructure morphology of the etched cross-sections of the samples were characterized by scanning electron microscopy(SEM),and thedistribution of the main chemical compositions in the interface of LBE and the matrix was analyzed by energy dispersive spectroscopy(EDS).The results showed that the two samples were subjected to a strong dissolution of the elements and the LBE penetration,and T91 showed a slightly better corrosion resistance to LBE than 316 L.
基金
国家自然科学基金重大研究计划(91026002)
国家自然科学基金(51301163)
中国科学院先导专项子项目(XDA03040200)资助
