Pressure-induced polyamorphic transitions in ytterbium-based bulk metallic glasses

Yy, Wang; Zhao, Wei; Li, G; Yc, Li; Liu, RP;李延春

doi:10.1016/j.matlet.2013.07.091

Cited by 11 publications

(3 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Analogous * Authors to whom any correspondence should be addressed. transformation was also reported in Pr-based [7], Nd-based [8], Gd-based [9], La-based [10], Yb-based [11], and other Cebased MGs [12]. The x-ray absorption spectroscopy and ab initio molecular dynamics (AIMD) simulations revealed that the polyamorphism in rare Earth element-based MGs (REMGs) was due to the delocalization of 4f electrons induced by pressure [6,13].…”

Section: Introductionmentioning

confidence: 75%

Structural evolution of heavy rare Earth-based metal glass under high pressure

Wang¹,

Zhang²,

Li³

et al. 2020

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

The structural evolution of Er55Al25Co20 metallic glasses (MGs) at high pressure was studied through x-ray diffraction with synchrotron radiation. The compression ratio, differential structure factor, pair distribution function g(r), and relative resistance as functions of pressure were analyzed and discussed. A reversible polyamorphic transition with a clear hysteresis was detected in the Er55Al25Co20 MGs. The irreversible annihilation of free volume and voids led to a densification of the specimens. Electronic resistance measurements demonstrated that the transition was strongly correlated with the electronic structural evolution. The results provide a new insight into understanding the mechanisms of polyamorphism in MGs.

show abstract

Section: Introductionmentioning

confidence: 75%

Structural evolution of heavy rare Earth-based metal glass under high pressure

Wang¹,

Zhang²,

Li³

et al. 2020

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

“…[4,5] The itinerant character of 4f electrons under high pressure causes amorphousto-amorphous phase transition in Yb-based BMGs. [6] These glasses are synthesized by first melting the base elements and then by quenching the melts. It is therefore desirable to know the structural, thermodynamic, and transport properties of liquid Yb, which govern the mechanical and structural properties of the Yb-based BMGs.…”

Section: Introductionmentioning

confidence: 99%

Structural and mass transport properties of liquid ytterbium in the temperature range 1123 K–1473 K

2023

View full text Add to dashboard Cite

We have studied structural and atomic transport properties for liquid f-shell ytterbium in a temperature range 1123–1473 K. Pair interactions among atoms are derived using a local pseudopotential. The potential parameters are fitted to the phonon dispersion curve at room temperature. The local pseudopotential used in the present study is computationally more efficient with only three parameters, and it is found to be transferable to the liquid phase without changing the parameters. Since computed various properties agree with reported theoretical and experimental findings; the adopted fitting scheme is justified. As a significant outcome of the study, we find that (i) the melting in Yb is governed by the Lindemann’s law, (ii) the mass transport mechanism obeys the Arrhenius law, (iii) the role of three particle correlation function for deriving the velocity autocorrelation function is little, (iv) the mean-square atomic displacement is more sensitive to the choice of interaction potential than the other bulk properties, and (v) the liquid Yb does not show liquid-liquid phase transition within the studied temperature range. Further, due to a good description of the structural and mass transport properties, we propose that Yb remains divalent at reduced density.

show abstract

“…The trivalent lanthanides (La through Lu except Eu and Yb) have been shown to follow a crystal structure sequence with decreasing the atomic number or increasing pressure: hcp → samarium type (Sm-type) → double hexagonal close packed (dhcp) → fcc → distorted fcc (dfcc) [9]. Except for pure rare-earth elements, lanthanide-solvent bulk metallic glasses undergo the low-density state to high-density state trasitions under high pressures [10][11][12][13][14]. This feature invites the questions: if the phase transition of the rare-earth-HEAs obey the route of rear-earth metatls under high pressures?…”

Section: Introductionmentioning

confidence: 99%