Bae Gwangmin, Kang Dong Gyu, Ahn Changui, Kim Daeho, Nam Hyeon Gyun, Hyun Gayea, Jang Dongchan, Han Seung Min, Jeon Seokwoo
Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea.
Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.
Nano Lett. 2024 Oct 23;24(42):13414-13421. doi: 10.1021/acs.nanolett.4c04010. Epub 2024 Sep 19.
The pursuit of harnessing superior mechanical properties achieved through the size effect on a macroscopic scale has been a prominent focus in engineering, as size-induced strengthening is enabled only in the nanoscale regime. This study presents a metal/ceramic/metal (MCM) nanocomposite reinforced by ceramic nanoarchitectures. Through proximity-field nanopatterning, the inch-scale production of nanoarchitecture films is enabled in a single fabrication step. The developed three-dimensional (3D) Ni/AlO/Ni nanocomposite film exhibits significantly high compressive strength, corresponding to an increase of approximately 30% compared with that calculated using the upper limits of the conventional rule of mixtures. The exceptional strength of the 3D MCM nanocomposite can be attributed to the extrinsic size effect of the ceramic nanoarchitectures. By combining size-induced strengthening of ceramics with the strengthening law for composites, a new type of strengthening model is derived and experimentally validated using the 3D MCM nanocomposite.
在宏观尺度上通过尺寸效应来追求获得卓越机械性能一直是工程领域的一个突出重点，因为尺寸诱导强化仅在纳米尺度范围内才能实现。本研究展示了一种由陶瓷纳米结构增强的金属/陶瓷/金属（MCM）纳米复合材料。通过近场纳米图案化，能够在单个制造步骤中实现英寸级的纳米结构薄膜生产。所制备的三维（3D）Ni/AlO/Ni纳米复合薄膜表现出显著高的抗压强度，与使用传统混合法则上限计算的值相比增加了约30%。3D MCM纳米复合材料的卓越强度可归因于陶瓷纳米结构的外在尺寸效应。通过将陶瓷的尺寸诱导强化与复合材料的强化规律相结合，推导并使用3D MCM纳米复合材料通过实验验证了一种新型强化模型。
