抗辐照纳米多层膜研究进展

Research Progress on Radiation Tolerance of Multilayer Nanofilms

大量研究表明,晶界和界面可以作为吸收缺陷(如空位、间隙原子)的"陷阱",因此含有大量晶界、界面的纳米晶、金属和氮化物纳米多层膜,具备良好的自愈合抗辐照能力,从而成为近年来的研究热点。综述了抗辐照纳米多层膜的研究进展,内容包括:材料的设计与制备,各种辐照模拟手段(如中子辐照、离子辐照和多束离子辐照)。重点介绍了离子束辐照模拟反应堆辐照,多层膜在离子束辐照下的行为(如微观结构和机械性能的演变)及纳米多层膜抗辐照机理。通过对CrN/AlTiN多层膜的离子辐照,验证了纳米多层膜中界面对缺陷的吸收作用。对纳米多层膜未来研究方向做了展望。

Numerous studies show that interface can serve as effective sinks for radiation-induced defects such as interstitials and vacancies. Owning a large number of interfaces, multilayer nanofilms attract a great research interest. In this paper, we review recent research progress on the development of the multilayer nanofilms for the purpose of radiation tolerance. The paper includes following parts： how to design and prepare multilayer nanofilms materials; evaluation with radiation simulation, such as neutron irradiation, ion irradiation and multi-beam ion irradiation; behaviors of multilayer nanofilms under ion beam irradiation, such as microstructure evolution and changes in mechanical properties; theore- tical study on the mechanism of radiation tolerance of multilayer nanofilms. Finally, the challenge and future research directions are briefly discussed.