Evidence of liquid–liquid transition in glass-forming La50Al35Ni15 melt above liquidus temperature

Xu, Wei; Sandor, Magdalena; Yu, Yao; Ke, Haibo; Zhang, H.P.; Li, Mao Zhi; Wang, Wei Hua; Liu, Lin; Wu, Yue

doi:10.1038/ncomms8696

Cited by 117 publications

(63 citation statements)

References 70 publications

(100 reference statements)

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“…With many efforts, the liquid-to-liquid crossover has been observed in several liquids, such as H 2 O, C, P and Si [1][2][3]9,16,39,42,44,48,49]. Recently, it was also revealed in pure liquid Ce [20], supercooled liquid Zr 41.2 Ti 13.8 Cu 12.5 Ni 10 Be 22.5 [23] and liquid La 50 Al 35 Ni 15 [47], remaining as an intriguing but still elusive phenomenon in metallic liquids. For several monoatomic metallic liquids (i.e., Al, Zn, Sn and In), Lou et al [21] found that the interatomic distances between the center atom and those on the first shell contract with increasing temperature, which promotes deeper understanding on the atomic structure evolution in metallic liquids [22,[24][25][26][27]29,[31][32][33][34][36][37][38]51].…”

Section: Introductionmentioning

confidence: 99%

Temperature-dependent structure evolution in liquid gallium

Xiong

Wang

et al. 2017

Acta Materialia

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Temperature-dependent atomistic structure evolution of liquid gallium (Ga) has been investigated by using in situ high energy X-ray diffraction experiment and ab initio molecular dynamics simulation. Both experimental and theoretical results reveal the existence of a liquid structural change around 1000 K in liquid Ga. Below and above this temperature the liquid exhibits differences in activation energy for self-diffusion, temperature-dependent heat capacity, coordination numbers, density, viscosity, electric resistivity and thermoelectric power, which are reflected from structural changes of the bond-orientational order parameter Q 6 , fraction of covalent dimers, averaged string length and local atomic packing. This finding will trigger more studies on the liquid-to-liquid crossover in metallic melts.

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Section: Introductionmentioning

confidence: 99%

Temperature-dependent structure evolution in liquid gallium

Xiong

Wang

et al. 2017

Acta Materialia

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“…20,39,40 It turns out that the cluster+glue-atom model is a unique approach that links the relevant local atomic structures and macroscopic properties of HE-MGs. In accord to this model, different SRO clusters are connected with the neighboring clusters with the aid of glue atoms (which, possibly contribute to the freevolume formation or creation of liquid-like regions), thus forming mid-range order configurations.…”

Section: Configurations Of Heasmentioning

confidence: 99%

Atomic and electronic basis for the serrations of refractory high-entropy alloys

et al. 2017

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Refractory high-entropy alloys present attractive mechanical properties, i.e., high yield strength and fracture toughness, making them potential candidates for structural applications. Understandings of atomic and electronic interactions are important to reveal the origins for the formation of high-entropy alloys and their structure−dominated mechanical properties, thus enabling the development of a predictive approach for rapidly designing advanced materials. Here, we report the atomic and electronic basis for the valence−electron-concentration-categorized principles and the observed serration behavior in high-entropy alloys and highentropy metallic glass, including MoNbTaW, MoNbVW, MoTaVW, HfNbTiZr, and Vitreloy-1 MG (Zr 41 Ti 14 Cu 12.5 Ni 10 Be 22.5 ). We find that the yield strengths of high-entropy alloys and high-entropy metallic glass are a power-law function of the electron-work function, which is dominated by local atomic arrangements. Further, a reliance on the bonding-charge density provides a groundbreaking insight into the nature of loosely bonded spots in materials. The presence of strongly bonded clusters and weakly bonded glue atoms imply a serrated deformation of high-entropy alloys, resulting in intermittent avalanches of defects movement.

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“…Unfortunately, the atomic arrangement details of the HOS could not be determined by any of our accessible techniques at present. Temperature-induced liquid-to-liquid polyamorphic transitions have been experimentally observed in some MG-forming liquids, suggested by heat capacity changes and the subtle kinks of the peak positions of the principal diffraction peak (PDP) in S(q) or nuclear magnetic resonance spectra as a function of temperature [37][38][39][40][41] . These transitions are usually reversible.…”

Section: Discussionmentioning

confidence: 99%

Two-way tuning of structural order in metallic glasses

et al. 2020

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Metallic glasses are expected to have quite tunable structures in their configuration space, without the strict constraints of a well-defined crystalline symmetry and large energy barriers separating different states in crystals. However, effectively modulating the structure of metallic glasses is rather difficult. Here, using complementary in situ synchrotron x-ray techniques, we reveal thermal-driven structural ordering in a Ce 65 Al 10 Co 25 metallic glass, and a reverse disordering process via a pressure-induced rejuvenation between two states with distinct structural order characteristics. Studies on other metallic glass samples with different compositions also show similar phenomena. Our findings demonstrate the feasibility of twoway structural tuning states in terms of their dramatic ordering and disordering far beyond the nearest-neighbor shells with the combination of temperature and pressure, extending accessible states of metallic glasses to unexplored configuration spaces.

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Evidence of liquid–liquid transition in glass-forming La50Al35Ni15 melt above liquidus temperature

Cited by 117 publications

References 70 publications

Temperature-dependent structure evolution in liquid gallium

Temperature-dependent structure evolution in liquid gallium

Atomic and electronic basis for the serrations of refractory high-entropy alloys

Two-way tuning of structural order in metallic glasses

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