| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nano and Micro Additive Manufacturing
|
| Presentation Title |
Nanoscale Additively Manufactured Oxides/Metal Nanocomposites with Composition-Dependent Microstructure and Strengths |
| Author(s) |
Wenxin Zhang, Julia R. Greer |
| On-Site Speaker (Planned) |
Wenxin Zhang |
| Abstract Scope |
With nanoscale hydrogel infusion additive manufacturing (AM), two-photon lithography-prepared polymer 3D structures are infused with aqueous metal species (Fe and Ni) and converted into nanocrystalline metal/oxide composites with <1000nm structural dimensions and ~10-100nm microstructural grain sizes.
Starting with varying Ni/Fe and undergoing air calcination, the hydrogel precursor transforms into oxide assemblages of wüstite-, magnetite-, and hematite-based phases. Subsequent thermal treatment with 5% H2 further leads to reduction and sintering, forming unique nanocomposites with Fe-dominant magnetite nano-grains and Ni-dominant metallic matrices. As-AM-fabricated nanocomposite nanopillars with Ni/(Ni+Fe)~5-80at% and diameters ~800-1200nm are examined with in situ nano-compression, demonstrating microstructure-dependent strengths ranging ~0.5-2GPa and deformation transitioning from intergranular fracture to localized plasticity from low to high Ni%.
The present AM approach provides a robust pathway to simultaneously tune compositions, microstructure, and structural dimensions at submicron resolutions. Continued study will target examining properties, e.g., magnetic, paving the way toward functional applications at nano-to-micro length scales. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Mechanical Properties |