Fe-Ni磁性温度感知合金与高温钠的相容性研究

材料导报

2020, Vol. 34

Issue (Z2): 334-337

金属与金属基复合材料

Fe-Ni磁性温度感知合金与高温钠的相容性研究

张金权, 许咏丽, 谢淳, 付晓刚, 龙斌

中国原子能科学研究院,北京 102413

Investigation on the Compatibility of Fe-Ni Magnetic Alloy with High Temperature Sodium

ZHANG Jinquan, XU Yongli, XIE Chun, FU Xiaogang, LONG Bin

China Institute of Atomic Energy, Beijing 102413, China

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摘要磁性温度感知合金可用于钠冷快堆非能动停堆系统,当堆内温度高于磁性合金居里点时,与合金连接的控制棒掉落堆芯,实现安全停堆。本工作对新研发的Fe-Ni磁性温度感知合金与530 ℃、560 ℃、600 ℃高温核级钠相容性开展了试验研究;试验后,进行了腐蚀深度、微观形貌以及表面腐蚀产物等分析。结果表明:试验后Fe-Ni合金表现为微小增重,随温度升高平均增重率升高;结合宏观形貌和线扫描能谱分析,表明样品表面形成了含锰氧化膜,该膜层可有效地阻止材料组分元素的溶解。经高温钠浸泡后,样品表面未发现点腐蚀和晶间腐蚀等局部腐蚀迹象,表明材料在高温钠中有较好的耐蚀性能。

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关键词: 非能动停堆系统 Fe-Ni磁性合金钠冷快堆相容性钠腐蚀

Abstract: Magnetic alloys are suggested to be used as structural materials for passive shut-down system in sodium-cooled fast reactor. When the temperature in the reactor exceeds the Curie temperature of the magnetic alloy, the control rod connected with magnetic alloy would insert into core to shut down the reactor. This paper presents the investigation on the compatibility of Fe-Ni magnetic alloy with high temperature sodium at 530 ℃, 560 ℃ and 600 ℃, respectively. After corrosion tests, a series of examinations including morphology analysis, corrosion rate evaluation, SEM analysis were performed. The results showed that, the weight of all specimens increased slightly after testing, and the average weight gain increased as the temperature rose. According to morphology analysis and EDS line scan analysis, a manganese oxide layer formed on the surface of samples, which could prevent the steel elements dissolving into sodium. No pitting corrosion and intergranular corrosion were detected, the materials showed a good corrosion resistance in sodium at high temperature.

Key words: passive shut-down system Fe-Ni magnetic alloy sodium cooled fast reactor compatibility sodium corrosion

出版日期: 2020-11-25 发布日期: 2021-01-08

ZTFLH:

TL433

通讯作者: binlong@ciae.ac.cn

作者简介: 张金权,中国原子能科学研究院高级工程师,在北京科技大学材料科学与工程系获学士学位,在中国原子能科学研究院核能科学与工程专业获硕士学位。以第一作者在国内外学术期刊会议上发表论文数篇;申请国家发明专利6项,其中授权3项;获国防科学技术进步奖三等奖一项。主要从事快堆材料与钠相容性研究,铅铋合金实验装置设计研究等,负责包括科工局核能开发项目、能源局重大专项等。龙斌,生于1969年,博士毕业于瑞士洛桑联邦理工大学(EPFL)材料科学与工程系,中国原子能科学研究院研究员,中国核工业研究生院教授。其主要研究方向为:核反应堆材料腐蚀性能研究、核材料微观组织研究、液态金属工艺技术研究以及材料的辐照性能研究等。

引用本文:

张金权, 许咏丽, 谢淳, 付晓刚, 龙斌. Fe-Ni磁性温度感知合金与高温钠的相容性研究[J]. 材料导报, 2020, 34(Z2): 334-337.
ZHANG Jinquan, XU Yongli, XIE Chun, FU Xiaogang, LONG Bin. Investigation on the Compatibility of Fe-Ni Magnetic Alloy with High Temperature Sodium. Materials Reports, 2020, 34(Z2): 334-337.

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http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2020/V34/IZ2/334

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4 姚守拙, 朱元保, 何双娥, 等. 元素化学反应手册, 湖南教育出版社, 1998.

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