硼硅酸盐玻璃离子辐照效应的研究  

Radiation effects on borosilicate glass irradiated with ions

作　　者：彭海波[1] 刘枫飞 孙梦利 张建东 杜鑫[1] 张晓阳 王广甫[2] 王铁山[1] PENG HaiBo;LIU FengFei;SUN MengLi;ZHANG JianDong;DU Xin;ZHANG XiaoYang;WANG GuangFu;WANG TieShan(School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China;School of Nuclear Science and Technology,Beijing Normal University,Beijing 100875,China)

机构地区：[1]兰州大学核科学与技术学院,兰州730000 [2]北京师范大学核科学与技术学院,北京100875

出　　处：《中国科学：物理学、力学、天文学》2019年第11期113-120,共8页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(编号:11505085);中央高校基本科研业务费(编号:lzujbky-2018-72);甘肃省引导科技创新发展专项资金(编号:2018ZX-07)资助项目

摘　　要：玻璃固化是目前国际上广泛采用的处理高放废物的方式.硼硅酸盐玻璃作为固化体备选材料之一,其辐照效应引起了人们的重视.本工作利用不同种类重离子辐照硼硅酸盐玻璃来研究其辐照效应,利用飞行时间二次离子质谱、原子力显微镜和纳米压痕的方式测量辐照后样品的元素分布、体积改变以及硬度和模量的改变.研究发现,辐照后玻璃元素仍呈均匀分布,产生了3.5%的体积膨胀.硬度和模量都出现迅速降低随后饱和的趋势,其饱和硬度和模量分别下降了35.4%和18.7%.根据实验结果可以得出,离子辐照导致硼硅酸盐玻璃的宏观性质(硬度、模量等)显著改变.由此可知在α衰变条件下,硼硅酸盐玻璃的宏观性质也会显著改变.核能量沉积是造成硼硅酸盐玻璃性质改变的重要原因.衰变产生的α粒子和反冲核对硼硅酸盐玻璃性质改变都有贡献,且都不能忽略.可以用单能重离子辐照的方式,同时模拟反冲核与α粒子的辐照损伤.Vitrification is an extensively accepted method to deal with highly level radioactive waste(HLW). As one of the candidates for immobilizing HLW, the radiation effects on borosilicate glass attract extensive attention. In this work,borosilicate glass samples were irradiated with different ions and radiation effects were studied. The elemental distribution with depth, volume, hardness and modulus variations were measured by ToF SIMS, AFM and nanoindentation, respectively. Trends of changing then saturating in volume, hardness and modulus were illustrated with the increase of dose. The increase of 3.5% in volume, decrease of 35.4% and 18.7% in hardness and modulus, respectively,were measured. Macroscopic properties of borosilicate glass changed remarkably with irradiations of ions. Therefore,one can draw a conclusion that changes in the macroscopic properties(hardness and modulus) of borosilicate glass would happen in condition of alpha decay. Deposition of nuclear stopping in borosilicate glass was an important reason of variations of the macroscopic properties. Both the alpha particle and recoil nucleus contributed the changes in the macroscopic properties of borosilicate glass, none of them was negligible. The radiation effects by impact of alpha particles and recoil nuclear on borosilicate could be simulated by irradiation of single heavy energy ions. These are important to study the radiation effects of alpha decay on vitrification.

关 键 词：硼硅酸盐玻璃 辐照效应 硬度 

分 类 号：TQ1[化学工程]