环氧树脂/碳化硼复合材料耐辐射和热老化性能研究  

Study on Irradiation and Thermal Aging Resistance of Epoxy Resin/Boron Carbide Composites

作　　者：张城皓 王硕珏[2] 田琳 谷潇夏 曹可 张龙[3] 马灿坤 王连才[3] 马慧玲 张秀芹[1] ZHANG Chenghao;WANG Shuojue;TIAN Lin;GU Xiaoxia;CAO Ke;ZHANG Long;MA Cankun;WANG Liancai;MA Huiling;ZHANG Xiuqin(Beijing Key Laboratory of Clothing Materials R&D and Assessment,Beijing Engineering Research Center of Textile Nanofiber,School of Materials Design&Engineering,Beijing Institute of Fashion Technology,Beijing 100029,China;Aerospace Research Institute of Materials&Processing Technology,Beijing 100076,China;Beijing Key Laboratory of Radiation Advanced Materials,Beijing Research Center for Radiation Application,Beijing 100015,China)

机构地区：[1]北京服装学院材料设计与工程学院,北京市服装材料研究开发与评价北京市重点实验室,北京市纺织纳米纤维工程技术研究中心,北京100029 [2]航天材料及工艺研究所,北京100076 [3]北京市射线应用研究中心,辐射新材料北京市重点实验室,北京100015

出　　处：《材料导报》2023年第23期221-226,共6页Materials Reports

基　　金：北京市科技新星(Z181100006218087);北京学者(RCQJ20303)。

摘　　要：本工作以环氧树脂为基体,碳化硼为中子吸收填料,采用高效的固化成型方法制备了环氧树脂/碳化硼复合屏蔽材料。通过扫描电镜(SEM)、差示扫描量热法(DSC)和热失重法(TGA)分析碳化硼含量对复合材料微观结构、固化程度和热稳定性的影响;通过辐照和热老化前后样品拉伸和冲击性能的测试探究了材料的辐射稳定性和热老化性能。实验结果表明:碳化硼粉体能均匀地分散在环氧树脂基体中;经过150℃不同时间的热老化测试和100 kGy辐照实验,复合材料的力学性能略有降低。采用SuperMC软件模拟计算了复合材料对热中子和慢中子的屏蔽性能,当复合材料厚度为5 mm时,复合材料对热中子和慢中子的屏蔽效率分别为99%和63%,此材料有望作为一种新型的屏蔽材料应用于乏燃料贮存罐中。Boron carbide/epoxy resin composite for neutron shielding application was prepared by a facile thermal curing method with epoxy resin as matrix and boron carbide(B 4C)as neutron absorbing filler.The microstructures of the composites were characterized by scanning electron microscopy(SEM).The curing degree and thermostability of the composites were further investigated via differential scanning calorimetry(DSC)and thermogravimetric analysis(TGA).The effects ofγ-irradiation and thermal aging on the composites were analyzed by tensile and impact tests.The results indicate that B 4C was uniformly dispersed in the epoxy resin matrix.The tensile stress of the composites slightly decreased after thermal aging at 150℃(1 and 3 weeks)and 100 kGy irradiation.And the neutron shielding performances of the composites were simulated by SuperMC software.When the thickness of the composite was 5 mm,radiation shielding effectiveness of the composite for thermal and slow neutrons was 99%and 63%,respectively.This composite is expected to be a new type of neutron shielding material in spent fuel storage tanks.

关 键 词：环氧树脂 碳化硼 耐高温 中子屏蔽 蒙特卡罗模拟计算(MCNP) 

分 类 号：TL933[核科学技术—辐射防护及环境保护]