Hierarchical nature of hydrogen-based direct reduction of iron oxides
نویسندگان
چکیده
Fossil-free ironmaking is indispensable for reducing massive anthropogenic CO2 emissions in the steel industry. Hydrogen-based direct reduction (HyDR) among most attractive solutions 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, hierarchy defects ranging across orders magnitude length, including vacancies, dislocations, internal interfaces, free surfaces form cracks pores. These can all act as reaction, nucleation, diffusion sites, shaping overall kinetics. A clear understanding roles interactions these dynamically-evolving nano-/microstructure features missing. Gaining better insights into effects could enable improved access microstructure-based design more efficient HyDR methods, potentially impact on urgently needed decarbonization
منابع مشابه
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ژورنال
عنوان ژورنال: Scripta Materialia
سال: 2022
ISSN: ['1359-6462', '1872-8456']
DOI: https://doi.org/10.1016/j.scriptamat.2022.114571