核燃料用γ-U合金的成分规律  

Composition Rule ofγ-U Alloys for Nuclear Fuel

作　　者：苑峻豪 董丹丹 王清[1] 王英敏[1] 羌建兵[1] 李晓娜[1] 董闯[1] 黄火根[3] 柯海波[3] 张培[3] 张鹏国[3] 刘天伟[4] Yuan Junhao;Dong Dandan;Wang Qing;Wang Yingmin;Qiang Jianbing;Li Xiaona;Dong Chuang;Huang Huogen;Ke Haibo;Zhang Pei;Zhang Pengguo;Liu Tianwei(Key Laboratory of Materials Modification by Laser,Ion and Electron Beams of Ministry of Education,Dalian University of Technology,Dalian 116024,China;Dalian University,Dalian 116622,China;China Academy of Engineering Physics,Jiangyou 621907,China;Science and Technology on Surface Physics and Chemistry Laboratory,Mianyang 621907,China)

机构地区：[1]大连理工大学三束材料改性教育部重点实验室,辽宁大连116024 [2]大连大学,辽宁大连116622 [3]中国工程物理研究院,四川江油621907 [4]表面物理与化学重点实验室,四川江油621907

出　　处：《稀有金属材料与工程》2020年第1期225-232,共8页Rare Metal Materials and Engineering

基　　金：国家重点研发计划(2017YFB0702400);科学挑战专题(TZ2016004);表面物理与化学重点实验室学科发展基金(XKFZ201706)。

摘　　要：铀合金作为一种重要核燃料,其体心立方结构的高温稳定的γ-U合金具有较好的综合性能,是合金设计所追求的目标。本文引入描述稳定固溶体结构的"团簇加连接原子"模型,用于建立γ-U固溶体合金的结构模型和相应成分式,指出其结构单元为体心立方第一近邻配位多面体团簇加3个连接原子构成。进而利用该结构单元对现有合金成分进行了解析,能够稳定形成体心立方bcc结构的合金均满足上述模型,如[Mo-U14]Mo3(U-10.7Mo),[Zr-U14]Nb3(U-7.5Nb-2.5Zr,即不锈铀)等,这些合金实际上均在各自体系中具有最优良的结构稳定性,显示出优异的耐蚀性。本文证实,基于团簇加连接原子模型的成分设计方法在预测γ-U合金成分与性能上具有重要指导价值。As an important nuclear fuel,γ-U alloys with the body centered cubic(bcc)structure have high temperature stability and comprehensive performance among uranium alloys,which are the target of recent alloy design.In the present paper,a cluster-plus-glue-atoms structure model,which is used to describe solid solution alloys,were applied to build the component formulas ofγ-U solution alloys,and clarify that the structural unit ofγ-U alloys is composed of bcc first neighbor coordination polyhedron cluster and three glue atoms.Further,an enormous amount of the existing alloy components were analyzed based on the model.Results indicate that all the bcc-stable alloys satisfy the model,such as[Mo-U14]Mo3(U-10.7 Mo),[Zr-U14]Nb3(U-7.5 Nb-2.5 Zr,i.e.,Mulberry alloy),which all exhibit the best structural stability in their respective systems and show excellent corrosion resistance.Therefore,the component design method based on cluster-plus-glue-atoms model clusters has important guiding value in predicting alloys composition and performance.

关 键 词：铀合金 团簇加连接原子结构模型 固溶体 成分 耐蚀性能 

分 类 号：TG146.8[一般工业技术—材料科学与工程]