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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ma, Yan
Delft University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2024Green Ironmaking at Higher H2 Pressure: Reduction Kinetics and Microstructure Formation During Hydrogen-Based Direct Reduction of Hematite Pelletscitations
- 2024Circular Steel for Fast Decarbonization: Thermodynamics, Kinetics, and Microstructure Behind Upcycling Scrap into High-Performance Sheet Steelcitations
- 2023Phase Transition of Magnetite Ore Fines During Oxidation Probed by In Situ High-Temperature X-Ray Diffractioncitations
- 2023Reducing Iron Oxide with Ammonia: A Sustainable Path to Green Steelcitations
- 2023Segregation-enhanced grain boundary embrittlement of recrystallised tungsten evidenced by site-specific microcantilever fracturecitations
- 2022Hydrogen-based direct reduction of iron oxide at 700°C: Heterogeneity at pellet and microstructure scalescitations
- 2022Phase transformations and microstructure evolution during combustion of iron powdercitations
- 2022Thermodynamics-guided alloy and process design for additive manufacturingcitations
- 2022Hierarchical nature of hydrogen-based direct reduction of iron oxidescitations
- 2021Mechanism-controlled thermomechanical treatment of high manganese steelscitations
- 2020Phase boundary segregation-induced strengthening and discontinuous yielding in ultrafine-grained duplex medium-Mn steelscitations
- 2019Macroscopic to nanoscopic in situ investigation on yielding mechanisms in ultrafine grained medium Mn steels: Role of the austenite-ferrite interfacecitations
- 2019Influence of Microstructural Morphology on Hydrogen Embrittlement in a Medium-Mn Steel Fe-12Mn-3Al-0.05Ccitations
- 2018Strain Aging Behavior of an Austenitic High-Mn Steelcitations
Places of action
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article
Hierarchical nature of hydrogen-based direct reduction of iron oxides
Abstract
Fossil-free ironmaking is indispensable for reducing massive anthropogenic CO2 emissions in the steel industry. Hydrogen-based direct reduction (HyDR) is among the most attractive solutions for green ironmaking, with high technology readiness. The underlying mechanisms governing this process are characterized by a complex interaction of several chemical (phase transformations), physical (transport), and mechanical (stresses) phenomena. Their interplay leads to rich microstructures, characterized by a hierarchy of defects ranging across several orders of magnitude in length, including vacancies, dislocations, internal interfaces, and free surfaces in the form of cracks and pores. These defects can all act as reaction, nucleation, and diffusion sites, shaping the overall reduction kinetics. A clear understanding of the roles and interactions of these dynamically-evolving nano-/microstructure features is missing. Gaining better insights into these effects could enable improved access to the microstructure-based design of more efficient HyDR methods, with potentially high impact on the urgently needed decarbonization in the steel industry.