LBE腐蚀对316L纤维毡拉伸性能的影响

doi:10.3969/j.issn.0253-2778.2017.06.006

中国科学技术大学学报 ›› 2017, Vol. 47 ›› Issue (6): 485-490.DOI: 10.3969/j.issn.0253-2778.2017.06.006

LBE腐蚀对316L纤维毡拉伸性能的影响

李文凯，周小娇，黄华，高胜

1.中国科学院核能安全技术研究所中子输运理论与辐射安全重点实验室，安徽合肥 230031；
2.中国科学技术大学核科学技术学院，安徽合肥 230027

收稿日期:2016-12-01 修回日期:2017-04-21 出版日期:2017-06-30 发布日期:2017-06-30
通讯作者: 黄华
作者简介:李文凯，男，1990年生，硕士. 研究方向：铅冷快堆冷却剂工艺技术. E-mail：leekai@mail.ustc.edu.cn
基金资助:
中国科学院战略性先导科技专项（XDA03040000），国家自然科学基金(11605229)资助.

Effects of corrosion on tensile property of 316L fiber felt in lead bismuth eutectic

LI Wenkai, ZHOU Xiaojiao, HUANG Hua, GAO Sheng

1. Key Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei 230031, China;
2. School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230027, China

Received:2016-12-01 Revised:2017-04-21 Online:2017-06-30 Published:2017-06-30

摘要/Abstract

摘要： 基于中国铅基研究堆CLEAR-Ⅰ高温运行环境，研究了过滤材料烧结316L纤维毡在氧浓度1×10-6 wt%、温度500℃、静态铅铋合金（lead bismuth eutectic, LBE）中腐蚀不同时间后拉伸性能的变化规律.结果表明，在腐蚀500 h、1000 h、1500 h后，纤维毡的抗拉强度分别下降至原始纤维毡的67%、33%和15%，其主要原因是在本实验条件下，LBE腐蚀导致烧结结点结合强度的下降和纤维丝丝径的减小.微观结构分析表明，316L纤维丝表面形成一层不断增厚的致密(Fe,Cr)3O4尖晶石氧化膜，该氧化膜形成与生长降低了纤维丝之间结点的结合强度，同时减小了纤维丝的有效丝径，进而导致纤维毡整体抗拉强度的下降.

关键词: 铅铋合金, 烧结316L纤维毡, 腐蚀, 抗拉强度

Abstract: Based on the operation environment of China Lead-based Research Reactor (CLEAR-I), the tensile properties of filter material-sintered 316L fiber felt exposed to stagnant lead bismuth eutectic (LBE) with 1×10-6 wt% oxygen concentration was investigated at 500℃ for 500 h, 1000h, 1500 h. The results showed that compared to the original fiber felt, the tensile strength of the fiber felts decreased to 67%, 33% and 15% after 500 h, 1000 h and 1500 h, respectively. It was found that the binding strength of the joints and diameter of 316L stainless steel fibers gradually decreased with exposure time due to the compact single-layer (Fe,Cr)3O4 spinel formation on 316L fibers, which was the main cause of tensile strength of sintered 316L fiber felt dropping after LBE corrosion.

Key words: lead bismuth eutectic, sintered 316L fiber felt, corrosion, tensile strength

中图分类号:

TL34

李文凯，周小娇，黄华，高胜. LBE腐蚀对316L纤维毡拉伸性能的影响[J]. 中国科学技术大学学报, 2017, 47(6): 485-490.

LI Wenkai, ZHOU Xiaojiao, HUANG Hua, GAO Sheng. Effects of corrosion on tensile property of 316L fiber felt in lead bismuth eutectic[J]. Journal of University of Science and Technology of China, 2017, 47(6): 485-490.

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LBE腐蚀对316L纤维毡拉伸性能的影响

Effects of corrosion on tensile property of 316L fiber felt in lead bismuth eutectic

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