| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
2023 Undergraduate Student Poster Contest
|
| Presentation Title |
Reduction Time-Temperature-Transformation Analysis of Hydrogel-based Additively Manufactured Copper, Nickel, and Copper-Nickel Oxide(s) Under Forming Gas |
| Author(s) |
Maria Jose Azcona Baez, Seneca J Velling, Wenxin Zhang, Thomas Tran, Sammy Shaker, Julia R Greer |
| On-Site Speaker (Planned) |
Maria Jose Azcona Baez |
| Abstract Scope |
The novel hydrogel infusion additive manufacturing (HIAM) process is paving a new path for the microscale printing of metallic and ceramic structures, with applications in architected electrodes and micro-to-millimetric high-temperature springs. In this study, we mapped the Time-Temperature-Transformation space (150-900°C, 1-360 min) of thermochemical reduction of Cu, Ni, and Cu-Ni oxides made using HIAM. X-ray powder diffraction (XRD) was used to quantitatively determine phase fractions of each specimen, while energy-dispersive X-ray spectroscopy (EDS) confirmed chemical homogeneity. ImageJ analysis of scanning electron micrographs (SEMs) enabled calculation of porosity and average grain size. Complete reduction was confirmed at 350°C and 400°C for CuO and NiO samples. At low temperatures (<400°C) and time (<60 minutes), small metal crystallites were found within the oxide samples, demonstrating nucleation. Further work will explore this phenomenon, examining the diffusion of hydrogen gas in the sample and its effect on metal nucleation and grain growth within the oxides. |