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Nanoglass–Nanocrystal Composite - a Novel Material Class for Enhanced Strength–Plasticity Synergy

Katnagallu, S.; Wu, G.; Singh, S. P.; Nandam, S. H.; Xia, W.; Stephenson, L. T.; Gleiter, H.; Schwaiger, R.; Hahn, H.; Herbig, M.; Raabe, D.; Gault, B.; Balachandran, S.

Abstract:
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.

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Verlagsausgabe §
DOI: 10.5445/IR/1000124123
Veröffentlicht am 13.10.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 01.10.2020
Sprache Englisch
Identifikator ISSN: 1613-6810, 1613-6829
KITopen-ID: 1000124123
Erschienen in Small
Band 16
Heft 39
Seiten Art.-Nr. 2004400
Vorab online veröffentlicht am 03.09.2020
Externe Relationen Abstract/Volltext
Nachgewiesen in Web of Science
Scopus
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