Atomic-Scale Heterogeneity of a Multicomponent Bulk Metallic Glass with Excellent Glass Forming Ability

Fujita, Takeshi; Konno, K.; Zhang, W.; Kumar, Vijay; Matsuura, Makoto; Inoue, Akihisa; Sakurai, Takeshi; Chen, M. W.

doi:10.1103/physrevlett.103.075502

Cited by 202 publications

(86 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Its low fraction may result from the large size gap between Zr and Cu atoms, which may retard the formation of such a regular cluster whose shell atoms are symmetrically packed around the center atom. Concerning Cu-centered VCs, it is remarkable that the fraction of <0,2,8,1> is twice larger than any other fraction, which is quite consistent with a recent report [48]. However, the weight of <0,0,12,0> is rather low, which matches well with the previous work [49].…”

Section: Cluster-level Structural Informationsupporting

confidence: 82%

Detecting Structural Features in Metallic Glass via Synchrotron Radiation Experiments Combined with Simulations

Guo

Luo

et al. 2015

Metals

View full text Add to dashboard Cite

Abstract:Revealing the essential structural features of metallic glasses (MGs) will enhance the understanding of glass-forming mechanisms. In this work, a feasible scheme is provided where we performed the state-of-the-art synchrotron-radiation based experiments combined with simulations to investigate the microstructures of ZrCu amorphous compositions. It is revealed that in order to stabilize the amorphous state and optimize the topological and chemical distribution, besides the icosahedral or icosahedral-like clusters, other types of clusters also participate in the formation of the microstructure in MGs. This cluster-level co-existing feature may be popular in this class of glassy materials.

show abstract

Section: Cluster-level Structural Informationsupporting

confidence: 82%

Detecting Structural Features in Metallic Glass via Synchrotron Radiation Experiments Combined with Simulations

Guo

Luo

et al. 2015

Metals

View full text Add to dashboard Cite

show abstract

“…In Ref. 80, for example, it has been noticed that selective minor additions can dramatically improve the GFA of binary metallic glasses. In particular, the effect of composition on the glass formation of the Cu-Ti-Zr alloys has been discussed in Refs.…”

Section: Finite-size Effectsmentioning

confidence: 99%

Structure of the glass-forming metallic liquids by ab-initio and classical molecular dynamics, a case study: Quenching the Cu60Ti20Zr20 alloy

Amokrane

Ayadim

Levrel

2015

Journal of Applied Physics

View full text Add to dashboard Cite

We consider the question of the amorphization of metallic alloys by melt quenching, as predicted by molecular dynamics simulations with semi-empirical potentials. The parametrization of the potentials is discussed on the example of the ternary Cu-Ti-Zr transition metals alloy, using as reference the ab-initio simulation. The pair structure in the amorphous state is computed from a potential of the Stillinger Weber form. The transferability of the parameters during the quench is investigated using two parametrizations: from solid state data, as usual, and from a new parametrization on the liquid structure. When the adjustment is made on the pair structure of the liquid, a satisfactory transferability is found between the pure components and their alloys. The liquid structure predicted in this way agrees well with experiment, in contrast with the one obtained using the adjustment on the solid. The final structure, after quenches down to the amorphous state, determined with the new set of parameters is shown to be very close to the ab-initio one, the latter being in excellent agreement with recent X-rays diffraction experiments. The corresponding critical temperature of the glass transition is estimated from the behavior of the heat capacity. Discussion of the consistency between the structures predicted using semi-empirical potentials and ab-initio simulation, and comparison of different experimental data underlines the question of the dependence of the final structure on the thermodynamic path followed to reach the amorphous state.

show abstract

“…2,3 This is despite the analysis of quenched glass structures that indicate atomic to nanometer scale structural heterogeneity must occur in the liquid state. [4][5][6][7] Silica is classified as a strong liquid with an Arrhenius viscosity-temperature relation and only subtle differences occur between the liquid and glass structures. 8,9 In contrast CaO-SiO 2 liquids can be considered fragile based on viscosity measurements 10,11 and consequently larger structural rearrangements are likely to be necessary to form a glass.…”

Section: Introductionmentioning

confidence: 99%

Temperature-dependent structural heterogeneity in calcium silicate liquids

et al. 2010

View full text Add to dashboard Cite

X-ray diffraction measurements performed on aerodynamically levitated CaSiO 3 droplets have been interpreted using a structurally heterogeneous liquid-state model. When cooled, the high-temperature liquid shows evidence of the polymerization of edge shared Ca octahedra. Diffraction isosbestic points are used to characterize the polymerization process in the pair-distribution function. This behavior is linear in the hightemperature melt but exhibits rapid growth just above the glass transition temperature around 1.2T g . The heterogeneous liquid interpretation is supported by molecular-dynamics simulations which show the CaSiO 3 glass has more edge-shared polyhedra and fewer corner shared polyhedra than the liquid model.

show abstract

Atomic-Scale Heterogeneity of a Multicomponent Bulk Metallic Glass with Excellent Glass Forming Ability

Cited by 202 publications

References 27 publications

Detecting Structural Features in Metallic Glass via Synchrotron Radiation Experiments Combined with Simulations

Detecting Structural Features in Metallic Glass via Synchrotron Radiation Experiments Combined with Simulations

Structure of the glass-forming metallic liquids by ab-initio and classical molecular dynamics, a case study: Quenching the Cu60Ti20Zr20 alloy

Temperature-dependent structural heterogeneity in calcium silicate liquids

Contact Info

Product

Resources

About