大气等离子喷涂制备Fe-Ni-B合金涂层-321不锈钢层状复合材料的射线屏蔽性能研究

Shielding properties against neutron and Gamma rays of Fe-Ni-B alloy coating/stainless steel laminated composite by air-plasma spraying procedure

为满足核辐射屏蔽材料对结构-功能一体化的需求,采用大气等离子喷涂工艺在321不锈钢基体上设计并制备了Fe-Ni-B合金涂层复合材料,用于防护从裂变反应堆释放的中子与γ射线。在介绍该层状复合材料设计与制备的关键参数与技术细节的基础上,主要研究了层状复合材料对中子及γ射线的屏蔽性能。研究结果表明,该层状复合材料具有结构-功能一体化特征,理论计算及测试结果对比分析表明该材料对中子及γ射线拥有良好的综合屏蔽能力,有望在各种核辐射反应堆屏蔽系统中使用。

To meet the requirement of integrative mechanical and functional properties of shielding materials,a type of Fe-Ni-B alloy coating was designed and produced on typical 321 stainless steel substrate(1Cr18Ni9Ti)by air-plasma spraying technique.This sort of coating has normally been used as protection against neutrons andγrays emanating from fission reactors.The design and preparation of the Fe-Ni-B coating/SS substrate laminated composite,and the relative key parameters and details had been described.The paper primarily investigated the radiation shielding abilities against neutron and gamma rays of the laminated composite,including the effective ability for the slowing down of fast-speed neutrons,the attenuation ability against 60 Co and 137Csγrays and absorption for 0.4eV below thermal neutrons.The results indicates that the Fe-Ni-B alloy coating/stainless steel laminated composite by optimal APS procedure posses excellent integrative shielding effectiveness against thermal neutron,fast-speed neutron,andγrays,and has the potential to be applied in nuclear radiation shielding devices.