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Ultrastable metallic glasses formed on cold substrates
- Source :
- Nature Communications, Nature Communications, Nature Publishing Group, 2018, 9, pp.1389-1-1389-9. ⟨10.1038/s41467-018-03656-4⟩, 'Nature Communications ', vol: 9, pages: 1389-1-1389-9 (2018), Nature Communications, Vol 9, Iss 1, Pp 1-7 (2018)
- Publication Year :
- 2018
- Publisher :
- Nature Publishing Group UK, 2018.
-
Abstract
- Vitrification from physical vapor deposition is known to be an efficient way for tuning the kinetic and thermodynamic stability of glasses and significantly improve their properties. There is a general consensus that preparing stable glasses requires the use of high substrate temperatures close to the glass transition one, Tg. Here, we challenge this empirical rule by showing the formation of Zr-based ultrastable metallic glasses (MGs) at room temperature, i.e., with a substrate temperature of only 0.43Tg. By carefully controlling the deposition rate, we can improve the stability of the obtained glasses to higher values. In contrast to conventional quenched glasses, the ultrastable MGs exhibit a large increase of Tg of ∼60 K, stronger resistance against crystallization, and more homogeneous structure with less order at longer distances. Our study circumvents the limitation of substrate temperature for developing ultrastable glasses, and provides deeper insight into glasses stability and their surface dynamics.<br />Producing ultrastable metallic glasses has always been associated with substrates heated close to the glass transition temperature. Here, the authors show that reducing the deposition rate of the metallic glass on a cold substrate produces ultrastable metallic glasses with remarkably improved stability.
- Subjects :
- Materials science
FORMING ABILITY
Science
SURFACE DYNAMICS
General Physics and Astronomy
02 engineering and technology
Substrate (electronics)
Kinetic energy
01 natural sciences
General Biochemistry, Genetics and Molecular Biology
Article
law.invention
[SPI]Engineering Sciences [physics]
law
0103 physical sciences
Vitrification
Crystallization
010306 general physics
lcsh:Science
TEMPERATURE
SUPPRESSION
[PHYS]Physics [physics]
Multidisciplinary
Amorphous metal
VAPOR-DEPOSITION
POLYMER
General Chemistry
021001 nanoscience & nanotechnology
Chemical physics
MOBILITY
LIQUIDS
Physical vapor deposition
BETA-RELAXATION
Chemical stability
lcsh:Q
0210 nano-technology
Glass transition
TRANSITION
Subjects
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- Nature Communications
- Accession number :
- edsair.doi.dedup.....120afb02ed86c9f01cd66f81bec505b9