【作者】 时淼； 龚嶷； 徐剑峰； 杨振国；

【Author】 Shi Miao;Gong Yi;Xu Jianfeng;Yang Zhenguo;Department of Materials Science,Fudan University;Shanghai Nuclear Engineering Research & Design Institute;Shanghai Institute of Process Automation Instrumentation;

【机构】 复旦大学材料科学系； 上海核工程研究设计院； 上海工业自动化仪表研究院；

【摘要】 由于核电站设备工作环境和输送介质的特殊性,阀门的生产常选用性能优良的非金属材料代替金属材料。因此针对辐照环境中非金属材料老化性能的研究就成了避免核电站阀门失效的关键点。本文采用多种表征测试手段,对人工加速辐照老化后的特种工程塑料PEEK进行了分析与研究。探究了PEEK受辐照老化的本质机理及不同辐照剂量下宏观热学性能、机械性能与微观晶体结构变化之间的关系。在试验结果及现有老化交联,晶体变化理论基础上,提出了特种工程塑料辐照老化机理的模型。最后根据理论模型,提出了相应的改进方案。更多还原

【Abstract】 Due to the particularity of the working environment and transportation medium in the nuclear power plant,the non-metallic materials are used for the valve production instead of the metal materials.Therefore,the study on the aging properties of non-metal materials in the irradiated environment has become the key point to avoid the failure of the nuclear power station valve.In this paper,after artificial accelerated aging,a variety of tests are used to analyze the special engineering plastics.The aging mechanism of the PEEK is studied.The relationship among thermal properties,mechanical properties and crystal structure changes under different radiation dose is explored.Based on the experimental results and the existed ageing crosslinking and crystal changing theory,the complete model of the special engineering plastics ageing mechanism is found out.According to the theoretical model,the improvement scheme is given.更多还原