SIMP钢中H对He热解吸行为的影响研究  

Study on the Effect of H on He Thermal Desorption Behavior in SIMP Steel

作　　者：金鹏[1,2] 申铁龙 李靖[1,2] 朱亚滨 崔明焕 庞立龙[1,2] 魏孔芳 盛彦斌[1,2] 王鹏 张桐民[1] 康龙 李军[1] 李锦玉 王志光[1,2] JIN Peng;SHEN Tielong;LI Jing;ZHU Yabin;CUI Minghuan;PANG Lilong;WEI Kongfang;SHENG Yanbin;WANG Peng;ZHANG Tongmin;KANG Long;LI Jun;LI Jinyu;WANG Zhiguang(Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China;State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]中国科学院大学核科学与技术学院,北京100049 [3]中国科学院兰州化学物理研究所固体润滑国家重点实验室,兰州730000

出　　处：《原子核物理评论》2020年第2期209-216,共8页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(11505246,11605256,91426301,11405231,11575258,11375242,11505247);四川省科技计划(2018JZ0014)。

摘　　要：为了初步理解核用结构材料中H对He行为的影响,以He离子单独辐照和He和H离子连续辐照作为对比,利用热释放谱(TDS)、透射电子显微镜(TEM)和扫描电子显微镜(SEM)研究了SIMP中H对He的热解吸和滞留行为的影响。TDS结果表明:He释放的主峰主要出现在1198~1222 K之间,对应于气泡的迁移释放机制。相对于He单独辐照,H的附加辐照使得He的释放峰向低温移动,且释放量增大。即H促进了He的热解吸。另外,H对He热解吸的促进作用与H的辐照剂量有关。当H注入的峰值浓度(原子分数)从5%增加到50%时,这种促进作用有所减弱。结合TEM和SEM结果发现:H的存在促进了TDS加热过程中材料表面的起泡行为,从而加速了He以气泡迁移机制释放的过程。In order to provide a basic understanding on the effect of H on He behaviors in the structural materials for the future nuclear systems,the effect of H on He thermal desorption and retention behaviors in SIMP steels was studied using thermal desorption spectroscopy(TDS),scanning electron microscope(SEM),and transmission electron microscopy(TEM)by comparing the results of the alone irradiation of 130 keV He+and the sequential irradiation of 130 keV He+and 160 keV H2+.The TDS results show that a major peak of He release occurred in the temperature of 1198-1222 K via the mechanism of bubble migration.The peak temperature of He release was lower and the release amount was larger under the sequential irradiation of He+and H2+than that under the He+-alone irradiation.This indicates that He desorption was enhanced by the additional H irradiation.In addition,the enhancement effect of H on He thermal desorption depends on the dose of H irradiation.When the peak concentration of H increased from 5%to 50%(atom fraction),this enhancement effect was weakened.Combined with TEM and SEM results,it was found that the presence of H promoted the surface blistering during TDS heating,thus accelerating the release of He by the mechanism of bubble migration.

关 键 词：SIMP钢 H/He辐照 热解吸 气泡 

分 类 号：TL341[核科学技术—核技术及应用]