SANS在RPV辐照钢纳米结构相的研究进展  

The Research Progress of SANS on Nano-scale Structures of Irradiated RPV Steel

作　　者：高建波 王子军[2] 张书彦 李天富[2] 梁志鹏 GAO Jianbo;WANG Zijun;ZHANG Shuyan;LI Tianfu;LIANG Zhipeng(Centre of Excellence for Advanced Materials,Dongguan of Guangdong Prov.523808,China;China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]东莞材料基因高等理工研究院,广东东莞523808 [2]中国原子能科学研究院,北京102413

出　　处：《核科学与工程》2024年第3期692-700,共9页Nuclear Science and Engineering

基　　金：广东省基础与应用基础研究重大项目(2019B030302011);广东省基础与应用基础研究基金(2020A1515110680)。

摘　　要：辐照通常会引起RPV钢纳米尺度团簇或沉淀相的形成演变,小角中子散射(SANS)技术是研究该类纳米结构的重要工具之一。该技术在材料研究中具有诸多优点:如研究尺度适中,具有较强的穿透性,对磁性结构敏感,能够区分近邻元素等。应用该技术可以研究RPV钢中子辐照诱发的纳米结构体尺寸、成分、体积分数等重要参数,深入理解宏观力学性能。本文介绍了几个典型的应用研究案例,具体包括磁场环境下的纳米结构观测;长周期辐照条件下的辐照缺陷特征研究;材料成分和辐照剂量率对析出团簇尺寸和体积分数的影响;原位退火过程的纳米析出物结构演化情况;以及氢元素对纳米团簇的影响等等。Irradiation generally can induce the formation and change of nano-scale clusters or precipitates in RPV steel.Small angle neutron scattering(SANS)technology is one of the important tools to study such nano-structures.SANS has many technical advantages,such as a suitable gauge dimension,strong penetrability,sensitivity to magnetic structure,and ability to distinguish adjacent elements.This technology can be used to study the size,composition,and volume fraction of the nano-structure induced by neutron irradiation,and further understand the macroscopic mechanical properties of RPV steel.In this paper,several typical application cases are introduced,including the study of nano-structure observation in a magnetic field environment;the characteristics of irradiation defects under the aspect of long term operation;the effects of material composition and the irradiation dose rate on the size and volume fraction of precipitated clusters;the evolution of nano-precipitation structures during in-situ annealing;and the effect of hydrogen on nano-clusters.

关 键 词：小角中子散射 RPV钢 辐照缺陷 纳米团簇 纳米析出物 

分 类 号：TL99[核科学技术—核技术及应用]