Journal Article10.1063/1.4962128
Properties of high-density, well-ordered, and high-energy metallic glass phase designed by pressurized quenching
18
TL;DR: Wakeda et al. as discussed by the authors applied gigapascal-level compressive hydrostatic pressure to the melt-quenching process of metallic glass to obtain a unique high-pressure glass state with high density that is well-ordered yet has high energy.
read more
Abstract: We applied gigapascal-level compressive hydrostatic pressure to the melt-quenching process of metallic glass to obtain a unique high-pressure glass state with high density that is well-ordered yet has high energy. This state contradicts the common understanding that high-density, well-ordered metallic glass states have low energy. Through molecular dynamics simulations, we found that the high-pressure glass state of the metallic glass Zr50Cu40Al10 has a rich anti-free volume and that its relaxation is dominated by the annihilation of full icosahedra and the rich anti-free volume. The aging rate of the high-pressure metallic glass state (energy reduction rate) is almost the same as that of typical high-energy metallic glass, suggesting that it has a lifetime similar to that of a typical high-energy metallic glass that has been experimentally realized and reported previously [Wakeda et al., Sci. Rep. 5, 10545 (2015)]. Thus, the high-pressure phase can be realized even under the experimental cooling rate, su...
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Structural modification through pressurized sub-T-g annealing of metallic glasses
A. Foroughi,H. Ashuri,R. Tavakoli,Mihai Stoica,Mihai Stoica,Daniel Şopu,Daniel Şopu,Jürgen Eckert,Jürgen Eckert +8 more
TL;DR: In this article, the authors performed long-term pressurized sub-Tg annealing for up to 1 μs using molecular dynamics simulations to systematically study the structure evolution of Cu50Zr50 MG.
20
Cryogenic thermal cycling rejuvenation in metallic glasses: Structural and mechanical assessment
TL;DR: In this article , an atomic-scale study was carried out to explore thermal cycling in CuZr MGs at different species contents, revealing that thermal cycling reduced the fraction of 3-atom connections, while increased 2-atom and 4-atom connection.
12
Plastic Deformation of Pressured Metallic Glass
TL;DR: The results exhibit that the dynamical heterogeneity of metallic liquid is more pronounced at high pressure, while the MGs were less fragile after the release of external pressure, reflected by the non-Gaussian parameter (NGP).
10
High Mixing Entropy Enhanced Energy States in Metallic Glasses
Juntao Huo,Kangyuan Li,B. Zang,M. Gao,Li-Min Wang,Baoan Sun,Maozhi Li,Lijian Song,Jun-Qiang Wang,Wei-Hua Wang +9 more
TL;DR: In this paper , the authors systematically investigated the energy state, mixing entropy and physical properties of Zr-Ti-Cu-Ni-Be multicomponent high entropy MGs by experiments and simulations.
10
References
Canonical dynamics: Equilibrium phase-space distributions
TL;DR: The dynamical steady-state probability density is found in an extended phase space with variables x, p/sub x/, V, epsilon-dot, and zeta, where the x are reduced distances and the two variables epsilus-dot andZeta act as thermodynamic friction coefficients.
Polymorphic transitions in single crystals: A new molecular dynamics method
Michele Parrinello,A. Rahman +1 more
TL;DR: In this paper, a new Lagrangian formulation is introduced to make molecular dynamics (MD) calculations on systems under the most general externally applied, conditions of stress, which is well suited to the study of structural transformations in solids under external stress and at finite temperature.
17.8K
A molecular dynamics method for simulations in the canonical ensemble
TL;DR: In this paper, a molecular dynamics simulation method which can generate configurations belonging to the canonical (T, V, N) ensemble or the constant temperature constant pressure ensemble was proposed, which is tested for an atomic fluid (Ar) and works well.
9.9K
Molecular Transport in Liquids and Glasses
Morrel H. Cohen,David Turnbull +1 more
TL;DR: In this paper, the authors derived a relation between the diffusion constant D in a liquid of hard spheres and the free volume vf, which is based on the concept that statistical redistribution of free volume occasionally opens up voids large enough for diffusive displacement.
3.9K
Atomic level structure in multicomponent bulk metallic glass.
TL;DR: The atomic-level structure of a representative ternary Cu-Zr-Al bulk metallic glass (BMG) has been resolved and Cu- (and Al-) centered icosahedral clusters are identified as the basic local structural motifs.
878