Nanocrystalline metals possess high strength and outstanding resistance to irradiation damage. However, the high-density grain boundaries in nanocrystalline metals lead to low plasticity and poor thermal stability. In recent years, interface engineering has gradually become an important way to improve the comprehensive properties of nanocrystalline metals. In this paper, the interface structure, deformation mechanism, and physical properties of Cu–Nb nanolayered composites fabricated by physical vapor deposition and accumulative roll bonding are reviewed. Both Cu–Nb nanolayered composites possess semi-coherent interfaces. The nanolayered composites could achieve excellent resistance to irradiation damage since the interfaces are good sinks for the irradiation point defects. In addition, nanolayered metallic composites with abundant heterogeneous interfaces have better thermal stability compared to nanocrystalline metallic materials. Moreover, the interactions between dislocations and interfaces can be adjusted effectively through controlling the atomistic interface structure and alignment of slip systems across the interface, so as to achieve high strength and high plastic deformation ability simultaneously.

中文翻译：

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界面对Cu-Nb纳米层状复合材料性能的影响

纳米晶金属具有高强度和出色的抗辐照损伤能力。然而，纳米晶金属中的高密度晶界导致塑性低和热稳定性差。近年来，界面工程逐渐成为提高纳米晶金属综合性能的重要途径。本文综述了物理气相沉积和累积滚压法制备的Cu-Nb纳米层状复合材料的界面结构、变形机制和物理性能。Cu-Nb 纳米层复合材料都具有半相干界面。由于界面是辐照点缺陷的良好汇，因此纳米层复合材料可以实现优异的抗辐照损伤能力。此外，与纳米晶金属材料相比，具有丰富异质界面的纳米层金属复合材料具有更好的热稳定性。此外，通过控制原子界面结构和跨界面滑移系统的排列，可以有效地调整位错和界面之间的相互作用，从而同时实现高强度和高塑性变形能力。