Ion-beam-assisted characterization of quinoline-insoluble particles in nuclear graphite  

作　　者：Qing Huang Xin-Qing Han Peng Liu Jian-Jian Li Guan-Hong Lei Cheng Li 

机构地区：[1]Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China [2]School of Physics,State Key Laboratory of Crystal Materials,Key Laboratory of Particle Physics and Particle Irradiation(MOE),Shandong University,Jinan 250100,China

出　　处：《Nuclear Science and Techniques》2020年第10期23-32,共10页核技术（英文）

基　　金：This work was supported by Youth Innovation Promotion Association of the Chinese Academy of Sciences(No.2019262);the National Natural Science Foundation of China(Nos.11505265,11805256,11805261).

摘　　要：The irradiation behavior of graphite is essential for its applications in the nuclear industry.However,the behavioral differences of graphite remain obscure because of the very limited comprehension of its microstructural differences.One typical structure,the quinoline-insoluble(QI)particle,was investigated using IG-110 and NBG-18 graphite.After irradiation,the QI particles on the polished surface were proven to become hillocks,which were easily identifiable via scanning electron microscopy(SEM).Thus,a method that combined ion irradiation and SEM characterization was proposed to study the distribution and concentration of QI particles in graphite.During irradiation,the QI particles were found to evolve into densified spheres,which were weakly bonded with the surrounding graphite structures,thereby indicating that the densification of QI particles did not evidently contribute to graphite dimensional shrinkage.A much higher concentration of QI particles in NBG-18 than IG-110,which was suggested to be responsible for the smaller maximum dimensional shrinkage of former over the latter during irradiation,was characterized.

关 键 词：Heavy ion irradiation Nuclear graphite Quinoline insoluble MICROSTRUCTURE 

分 类 号：TL341[核科学技术—核技术及应用]