Journal Article

PUBDB-2024-08088

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Reactive vapor-phase dealloying-alloying turns oxides into sustainable bulk nano-structured porous alloys

Wei, S.Extern* ; Ma, Y.Extern* ; Raabe, D. (Corresponding author)Extern*

2024
Assoc. Washington, DC [u.a.]

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Please use a persistent id in citations: doi:10.1126/sciadv.ads2140  doi:10.3204/PUBDB-2024-08088

Abstract: For millennia, alloying has been the greatest gift from metallurgy to humankind: a process of mixing elements, propelling our society from the Bronze Age to the Space Age. Dealloying, by contrast, acts like a penalty: a corrosive counteracting process of selectively removing elements from alloys or compounds, degrading their structural integrity over time. We show that when these two opposite metallurgical processes meet in a reactive vapor environment, profound sustainable alloy design opportunities become accessible, enabling bulk nanostructured porous alloys directly from oxides, with zero carbon footprint. We introduce thermodynamically well-grounded treasure maps that turn the intuitive opposition between alloying and dealloying into harmony, facilitating a quantitative approach to navigate synthesis in such an immense design space. We demonstrate this alloy design paradigm by synthesizing nanostructured Fe-Ni-N porous martensitic alloys fully from oxides in a single solid-state process step and substantiating the critical kinetic processes responsible for the desired microstructure.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20230183 (I-20230183) (I-20230183)
3. FS-Proposal: I-20231121 (I-20231121) (I-20231121)
4. FS-Proposal: I-20231001 (I-20231001) (I-20231001)
5. ROC - Reducing Iron Oxides without Carbon by using Hydrogen-Plasma (101054368) (101054368)

Experiment(s):

1. PETRA Beamline P02.1 (PETRA III)
2. PETRA Beamline P21.2 (PETRA III)

Appears in the scientific report 2024

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