Helium bubble formation and evolution in NiMo-Y_(2)O_(3)alloy under He ion irradiation

作     者：Awen Liu Hefei Huang Jizhao Liu Zhenbo Zhu Yan Li 刘阿文;黄鹤飞;刘继召;朱振博;李燕

作者机构：School of Physical Science and TechnologyShanghai Tech UniversityShanghai 201210China Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China School of Nuclear Science and TechnologyUniversity of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2022年第31卷第4期

页      面：500-505页

核心收录：

学科分类：082703[工学-核技术及应用] 08[工学] 080502[工学-材料学] 0827[工学-核科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12022515,11975304,and 91126012) the Youth Innovation Promotion Association,CAS(Grant No.202063) 

主　　题：NiMo-Y_(2)O_(3)alloy dose rate helium bubble evolution volume fraction 

摘      要：We report helium ion irradiation experiments for a new type of dispersion-strengthened NiMo-Y_(2)O_(3)alloy with three different irradiation doses and varying irradiation dose rates at 750℃to evaluate its helium-induced damage *** electron microscopy was used to reveal the evolution of helium bubbles after *** experimental results show that with increasing ion dose,the number density of helium bubbles increases ***,the mean size of helium bubbles first increases and then decreases,mainly due to the varied ion dose *** volume fractions of helium bubbles in the three investigated samples after irradiation are 0.15%,0.32%,and 0.27%,which are lower than that of the Hastelloy N alloy(0.58%)after similar irradiation *** indicates that the NiMo-Y_(2)O_(3)alloy exhibits better helium-induced-swelling resistance than the Hastelloy N alloy,highlighting its potential applicability to MSRs,from the perspective of irradiation performance.