多种重离子辐照对硼硅酸盐玻璃机械性能的影响  

Mechanical Properties of Borosilicate Glass with Different Irradiation of Heavy Ions

作　　者：张晓阳 彭海波[1] 刘枫飞 赵彦[1] 孙梦利 管明 张冰焘 杜鑫[1] 袁伟[1] 王铁山[1] ZHANG Xiao-Yang;PENG Hai-Bo;LIU Feng-Fei;ZHAO Yan;SUN Meng-Li;GUAN Ming;ZHANG Bing-Tao;DU Xin;YUAN Wei;WANG Tie-Shan(School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]兰州大学核科学与技术学院

出　　处：《无机材料学报》2019年第7期741-747,共7页Journal of Inorganic Materials

基　　金：国家自然科学基金(11505085,U1867207);中央高校基本科研业务费(lzujbky-2018-72,lzujbky-2018-74);甘肃省引导科技创新发展专项资金(2018ZX-07)~~

摘　　要：研究辐照导致硼硅酸盐玻璃机械性能的影响,对高放废物的长期安全处置具有重要的意义。本工作采用0.3MeV的P离子、4 MeV的Kr离子、5 MeV的Xe离子以及8 MeV的Au离子分别辐照硼硅酸盐玻璃,利用纳米压痕技术表征了辐照前后样品的硬度和模量。结果表明:硼硅酸盐玻璃的硬度和模量在一定范围内会随着辐照剂量的增大而减小,辐照达到0.1 dpa时硬度和模量变化趋于饱和,此时硬度下降了35%,模量下降了18%;而且不同种类的离子辐照对硼硅酸盐玻璃的硬度和模量造成的变化趋势基本相同。使用掠入射X射线衍射仪对样品晶态结构进行了分析,发现辐照后硼硅酸盐玻璃仍保持非晶状态。利用Raman光谱对辐照后样品的微观结构的变化进行了表征,发现辐照会导致玻璃网络结构发生改变,玻璃的聚合度下降,无序度增加。本工作还证明了离子辐照导致玻璃机械性能变化的主要因素是离子在样品中的核能量沉积导致玻璃结构的改变。To understand the evolutions in mechanical properties of borosilicate glass under irradiation is significant for evaluating its performance after long-term interaction with irradiation environment.In this study,borosilicate glass samples were irradiated with 0.3 MeV P-ions,4 MeV Kr-ions,5 MeV Xe-ions and 8 MeV Au-ions,respectively.Modification of the samples’ mechanical properties before and after radiation was investigated with nano-indentation measurement.With increase of irradiation dose,both hardness and modulus of samples irradiated with P,Kr,Xe and Au ions drop and then saturate at 0.1 dpa.The trends of hardness variations for the sample irradiated with four kinds of ions at different energies are similar,and the change of modulus also follows the same rule.The maximum variation of NBS2 sample’ hardness and modulus are about 35% and 18%,respectively.The grazing incident X-ray diffraction (GIXRD) was employed to analyze the phase structure.The results indicate that borosilicate glass still remains amorphous after irradiation.The microstructure evolutions of irradiated borosilicate glasses were characterized by Raman spectroscopy.The decrease of network polymerization and the increase of structural disorder are suggested by Raman spectra.In addition,the results also suggest that the main factor for the evolutions of the hardness and modulus of the borosilicate glass under ion irradiation is the change of the deformation of glass network,which was caused by nuclear energy deposition in samples.

关 键 词：硼硅酸盐玻璃 辐照效应 机械性能 

分 类 号：TQ171[化学工程—玻璃工业]