金属纳米多层膜力学性能研究进展

新型功能材料及器件向小型化,集成化和复合化发展的趋势,使得尺寸在纳米尺度的层状材料和柔性多层器件在使用过程中的服役行为成为其发展的关键科学问题。本文结合作者近几年对Ag/M系列和Cu/M系列多层膜力学性能的研究工作,对金属纳米多层膜的微结构特征及其对力学性能的影响进行了回顾和总结,主要包括多层膜的晶粒形貌对其强化机制和塑性变形行为的影响,组元强度错配对多层膜硬化行为的影响,界面结构与其强度极值的关系、不对称界面结构引起的异常弹性模量增强和多层膜的室温蠕变机制及界面结构对蠕变性能的影响等几个方面,并对多层膜的力学性能研究进行了展望。

Progress in Research Properties of Nanoscale on the Mechanical Metallic Multilayers

The tendency of new tunc, tional materials and devices to being miniature, integrated and laminated makes the mechanical behavior of those materials in nano scale a key scientific issue for the development of the multilayers and de- vices. Recent researches and developments on the mechanical properties of nanoscale metallic multilayers were summa- rized and introduced in this article based on our own works on Ag/M and Cu/M muhilayers, including issues related to the influence of grain morphology on strengthening mechanisms and plastic deformation behavior, the effects of strength mismatch of component elements on hardness enhancement, the correlation between inteffacial structure and strength maxi- mum value, abnormal modulus enhancement caused by asymmetrical interfacial structure, rooin temperature creep mecha- nisms and the influence of the inteffacial structure on the creep behavior. Meanwhile, the future research on metallic mul- tilayers was also discussed.