|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location Specific, Processing-Microstructure-Property-Relationships III
||Additive Manufacturing of 3D Nano-architected Metals
||Andrey Vyatskikh, Stéphane Delalande, Akira Kudo, Xuan Zhang, Julia R. Greer
|On-Site Speaker (Planned)
Most existing methods for additive manufacturing (AM) of metals are limited to feature sizes of 20-50 μm, which renders them inapplicable for generating complex 3D metallic shapes with smaller dimensions.
We demonstrate a lithography-based process to create complex 3D nano-architected metals with ~100 nm resolution. We synthesize metal-organic frameworks (MOFs) that contain Ni clusters and use them to produce a metal-rich photoresist. We use two-photon lithography to sculpt the computer-designed architectures out of the resist and pyrolyze them to volatilize the organic constituents, which results in a > 90wt% metal architecture. Using this approach, we demonstrate the fabrication of Ni octet nanolattices with a unit cell size of 2 μm, and beam diameters of ~300 nm. TEM analysis reveals that the microstructure of such-processed Ni is nanocrystalline, with a 20 nm mean grain size. These findings suggest an efficient pathway to create complex three-dimensional metal structures with nano-scale resolution.
||Planned: Supplemental Proceedings volume