Does shape affect shape change at the nanoscale?
Does shape affect shape change at the nanoscale?
复制标题
形状会影响纳米尺度的形状变化吗？
作者：
M. Demkowicz
由于位错与晶粒和相界的相互作用，纳米复合金属的机械变形行为取决于其成分的尺寸。现在越来越明显的是，这些材料的力学性能也取决于其组成的形状。本文综述了两种复杂互穿相组成的金属纳米复合材料——物理气相共沉积相分离形成的金属纳米复合材料和液态金属合金化合成的金属纳米复合材料的实验和模型研究。讨论了这些材料为研究复杂的微观结构形态及其对力学行为的影响所带来的机遇和挑战。
The mechanical deformation behavior of nanocomposite metals depends on the dimensions of their constituents, due to the interactions of dislocations with grain and phase boundaries. It is now becoming apparent that the mechanical behavior of these materials also depends on the constituent shapes. This article summarizes experimental and modeling investigations on two types of metal nanocomposites composed of intricately interpenetrating phases—those formed by phase separation in physical vapor codeposited alloys and those synthesized by liquid-metal dealloying. The opportunities and challenges these materials present for investigating complex microstructural morphologies and their effects on mechanical behavior are discussed.