核电作为一种高效而清洁的能源，已成为我国重点发展的新型战略产业。然而，核电站投入运行发电的同时，也产生了大量高放射性的乏燃料，急需发展高效中子吸收材料以确保乏燃料的贮存安全。Fe基非晶合金兼具高耐蚀、耐磨及高硼含量的特性，是一种理想的中子吸收材料。本项目以研发Fe基非晶合金涂覆硼钢这一新型高效中子吸收材料为目标，系统开展以下几个方面的研究：1）基于蒙特卡罗MCNP，进行非晶合金涂覆硼钢材料的中子吸收能力的优化设计；2）从原子团簇耦合模型出发，设计并研制兼具抗辐照、高耐蚀及良好玻璃形成能力的Fe基块体非晶合金；3）利用超音速喷涂制备致密度高的Fe基非晶涂层，分析缺陷及残余应力的形成机理并实施调控；4）评价Fe基非晶合金涂覆硼钢材料的抗辐照及长期腐蚀性能，探讨抗辐照耐蚀机理。通过以上工作，可建立材料设计-喷涂工艺-微观结构-使役性能之间的内在联系，并有效地推动该类材料在乏燃料贮存领域的应用。

With the increasing numbers of nuclear power plants are built and put into operation, more and more spent nuclear fuels are produced. Therefore, it is of utmost importance to develop high performance neutron-absorbing materials for storage of these spent nuclear fuels to keep the health of human being and the ecological safety. Fe-based metallic glasses with high boron content may have beneficial application as a neutron absorber, supporting the safe long-term disposal of spent nuclear fuels. This material has exceptional neutron absorption characteristics and is stable at high dose. The purpose of this proposal is to develop an ideal neutron-absorbing material, in which there exists the composite structure with borated stainless coated by Fe-based amorphous alloys. Such a composite structure is expected to hold excellent neutron absorption properties. The detailed research contents include: 1) To simulate the neutron-absorbing ability of this kind of composite materials by means of MCNP software; 2) To design new Fe-based bulk metallic glasses with the combination of high neutron-absorbing feature, high corrosion resistance and good glass-forming ability, which is based upon effective atomic packing model coupled with chemical interaction; 3) To prepare high-density amorphous coatings in borated steel matrix by high velocity air fuel (HVAF) and to analyze the characteristics of porosity defects and residual stress of materials; 4) To evaluate the irradiation and corrosion performance of these composite materials and further to uncover their intrinsic mechanisms. As the above studies are completed, a mutual relationship among material design, thermal spraying technology, microstructure and service properties will be established. It is believed that this work is very beneficial to push the application of Fe-based amorphous coatings in the field of spent nuclear fuel storage.