高稳定性纳米复合多层膜钨基块材的制备和抗辐照性能研究

项目名称： 高稳定性纳米复合多层膜钨基块材的制备和抗辐照性能研究

项目编号： No.11475216

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 方前锋

作者单位： 中国科学院合肥物质科学研究院

项目金额： 96万元

中文摘要： 高稳定性的纳米结构材料因为其丰富的界面可以吸收和湮灭辐照点缺陷，被认为是一种优异的抗辐照材料。本项目针对如何利用界面设计来提高钨基合金材料的抗辐照性能的问题，利用铜或铬与钨互不相溶的特性以及先进的累积轧制粘合（ARB）技术，来制备高稳定性的钨/铜或钨/铬纳米复合多层膜块体材料；采用高能离子辐照、微结构分析、力学性能测量等方法，研究多层膜材料的力学性能、辐照缺陷浓度等随辐照剂量和单层膜厚度的变化规律；结合计算机模拟研究，分析纳米复合多层膜中不同结构的膜间界面对材料力学性能和抗辐照性能的优化机理。项目预期将提供高性能钨/铜或钨/铬纳米复合多层膜块体材料的ARB制备技术，建立纳米复合多层膜材料辐照损伤的物理图像。项目的研究成果对于新型纳米复合多层膜块体金属材料的研发具有重要意义，可以为新型钨基合金材料的性能优化和最终应用于热核聚变反应堆提供科学依据。

中文关键词： 辐照损伤；纳米材料；快重离子辐照；损伤机理；核材料

英文摘要： High stability nano-structured materials was believed to be one of the most superior anti-irradiation materials because the interfaces act as effective sinks for the point defects produced by irradiation. This project will explore the technique of accumulative rolling bonding - ARB to synthesize nano-structured W/Cu and W/Cr multilayered bulk materials for fusion application. The immiscibility of W with Cu and Cr will be used to increase the stability of W based nano-structured materials. The mechanical properties and the concentration of irradiation induced defects as a function of irradiation dose and the thickness of monolayer will be explored. Combining with the computer simulation, the role that the interfaces with different micro-structures played for the improvement of mechanical properties and irradiation resistance in the multilayered nanocomposites will be clarified. This project will provide the ARB technique for the fabrication of high performance W/Cu and W/Cr multilayered bulk materials, and figure out the physical concept of the irradiation damage in the nano-structured multilayers. These studies will help to improve the properties of this kind of tungsten based materials for the future thermal nuclear reactors.

英文关键词： Irradiation damage;nano-structured materials;Irradiation of fast heavy ions;Damage mechanism;Nuclear materials