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Nanoglass–Nanocrystal Composite—a Novel Material Class for Enhanced Strength–Plasticity Synergy
Author(s) -
Katnagallu Shyam,
Wu Ge,
Singh Shiv Prakash,
Nandam Sree Harsha,
Xia Wenzhen,
Stephenson Leigh T.,
Gleiter Herbert,
Schwaiger Ruth,
Hahn Horst,
Herbig Michael,
Raabe Dierk,
Gault Baptiste,
Balachandran Shanoob
Publication year - 2020
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.202004400
Subject(s) - materials science , nanocrystalline material , nanocrystal , amorphous solid , plasticity , microstructure , composite number , atomic units , nanotechnology , metastability , composite material , chemical engineering , crystallography , chemistry , physics , organic chemistry , quantum mechanics , engineering
The properties of a material can be engineered by manipulating its atomic and chemical architecture. Nanoglasses which have been recently invented and comprise nanosized glassy particles separated by amorphous interfaces, have shown promising properties. A potential way to exploit the structural benefits of nanoglasses and of nanocrystalline materials is to optimize the composition to obtain crystals forming within the glassy particles. Here, a metastable Fe‐10 at% Sc nanoglass is synthesized. A complex hierarchical microstructure is evidenced experimentally at the atomic scale. This bulk material comprises grains of a Fe 90 Sc 10 amorphous matrix separated by an amorphous interfacial network enriched and likely stabilized by hydrogen, and property‐enhancing pure‐Fe nanocrystals self‐assembled within the matrix. This composite structure leads a yield strength above 2.5 GPa with an exceptional quasi‐homogeneous plastic flow of more than 60% in compression. This work opens new pathways to design materials with even superior properties.