Fabrication of Metastable Crystalline Nanocomposites by Flash Annealing of Cu47.5Zr47.5Al5 Metallic Glass Using Joule Heating

Flash Joule-heating was applied to the Cu47.5Zr47.5Al5 metallic glass for designing fully crystalline metastable nanocomposites consisting of the metastable B2 CuZr and low-temperature equilibrium Cu10Zr7 phases. The onset of crystallization was in situ controlled by monitoring resistivity changes i...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2020-01, Vol.10 (1), p.84
Main Authors: Okulov, Ilya, Soldatov, Ivan, Kaban, Ivan, Sarac, Baran, Spieckermann, Florian, Eckert, Jürgen
Format: Article
Language:English
Subjects:
Amorphous materials
Annealing
Composite materials
Cooling
Crystal structure
Crystallinity
Crystallization
Ductility
Equilibrium
Fabrication
Flash annealing
Heating
Heating rate
Low temperature
mechanical behaviour
Mechanical properties
metallic glass
Metallic glasses
metastable material
Microstructure
nanocomposite
Nanocomposites
Nanomaterials
Nanotechnology
Ohmic dissipation
Physical properties
Precipitates
Radiation
Resistance heating
Scanning electron microscopy
Software
Titanium alloys
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Summary:Flash Joule-heating was applied to the Cu47.5Zr47.5Al5 metallic glass for designing fully crystalline metastable nanocomposites consisting of the metastable B2 CuZr and low-temperature equilibrium Cu10Zr7 phases. The onset of crystallization was in situ controlled by monitoring resistivity changes in the samples. The effect of heating rate and annealing time on the volume fraction of the crystalline phases and mechanical properties of the nanocomposites was studied in detail. Particularly, an increase of the heating rate and a decrease of the annealing time lead to a lower number of equilibrium Cu10Zr7 precipitates and an increase of tensile ductility. Tailoring of these non-equilibrium microstructures and mechanical properties may not be possible unless one starts with a fully glassy material that opens new perspectives for designing metastable nanomaterials with unique physical properties.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano10010084