About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2026 - In-Situ Characterization Techniques
|
| Presentation Title |
Multiscale explorations of sustainable porous alloy making via oxides |
| Author(s) |
Shaolou Wei, Xizhen Dong, Dierk Raabe |
| On-Site Speaker (Planned) |
Shaolou Wei |
| Abstract Scope |
Alloys with sub-micron or nano-scale porosity stand out from their fully dense counterparts because of their promising specific mechanical strength and attractive catalytic properties. The synthesis of them, however, remains challenging and necessitates meticulously designed dealloying routes and the use of eco-unfriendly chemicals. Here we will show that bi-continuous porous alloys with tunable phase constitution can be achieved by leveraging the thermodynamics and kinetics of NH3/H2-based oxide reduction, leaving H2O as the only byproduct. By integrating in situ synchrotron X-ray diffractometry, X-ray nano tomography, and electron microscopy, we aim to address three fundamental questions: (i) What are the operating oxide reduction and solid-state alloying micro-mechanisms? (ii) What are the topological characteristics of the pores and their networks? (iii) What are the potential phase transformation pathways that can be tailored for microstructure design? We will also discuss a generalized microstructure-pore topology design map to navigate property-oriented synthesis of these porous alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Copper / Nickel / Cobalt, Phase Transformations |