“Lattice Strain Matching”‐Enabled Nanocomposite Design to Harness the Exceptional Mechanical Properties of Nanomaterials in Bulk Forms
“Lattice Strain Matching”‐Enabled Nanocomposite Design to Harness the Exceptional Mechanical Properties of Nanomaterials in Bulk Forms
复制标题
– 晶格应变匹配 – 实现纳米复合材料设计，以利用块状纳米材料的卓越机械性能
DOI：
10.1002/adma.201904387
复制
发表时间：
2020
影响因子：
29.4
通讯作者：
Hong Yang
中科院分区：
文献类型：
--
作者：
Junsong Zhang;Yang Liu;Lishan Cui;Shijie Hao;Daqiang Jiang;Kaiyuan Yu;Shengcheng Mao;Yang Ren;Hong Yang
已知纳米材料具有承受超大弹性应变（4-10%）的能力，并且具有接近其理论极限的抗弯强度。然而，这是一个长期的挑战，利用其特殊的内在机械性能在散装形式。这通常被称为纳米复合材料设计中的“死亡谷”。在2013年，为了克服这一挑战，通过使用马氏体相变基质来创建复合材料，其中嵌入其中的Nb纳米带中实现了高达6.7%的超大弹性晶格应变，这一突破是通过均匀超大弹性应变（4-10%）之间的相变辅助晶格应变匹配的新概念实现的。的纳米材料和均匀的晶体晶格畸变应变（4-10%）的马氏体相变的矩阵。这一新概念为开发具有特殊机械性能或增强功能特性的材料提供了新的机会，这在以前是不可能的。报告了过去六年来这项研究的进展情况。
Nanosized materials are known to have the ability to withstand ultralarge elastic strains (4–10%) and to have ultrahigh strengths approaching their theoretical limits. However, it is a long-standing challenge to harnessing their exceptional intrinsic mechanical properties in bulk forms. This is commonly known as “the valley of death” in nanocomposite design. In 2013, a breakthrough was made to overcome this challenge by using a martensitic phase transforming matrix to create a composite in which ultralarge elastic lattice strains up to 6.7% are achieved in Nb nanoribbons embedded in it. This breakthrough was enabled by a novel concept of phase transformation assisted lattice strain matching between the uniform ultralarge elastic strains (4–10%) of nanomaterials and the uniform crystallographic lattice distortion strains (4–10%) of the martensitic phase transformation of the matrix. This novel concept has opened new opportunities for developing materials of exceptional mechanical properties or enhanced functional properties that are not possible before. The work in progress in this research over the past six years is reported.