Evolution of the atomic structure of a supercooled Zr55Cu35Al10 liquid

Zhao, Jingfeng; Tang, Zheng; Kelton, K. F.; Liu, C.T.; Liaw, Peter K.; Inoue, Akihisa; Shen, Xiaoping; Pan, Shiyan; Johnson, Mark L.; Chen, Guang; Fan, Chenglei

doi:10.1016/j.intermet.2016.11.010

Cited by 14 publications

(2 citation statements)

References 33 publications

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“…In addition, they conducted series AIMD simulations to further analyze and improve their model 132 . Figure 15 shows the relative fractions of cluster, i-zone and free volume atom pairs compared to their summation as a function of temperature and Figure 16 shows the effect of different elements.…”

Section: Tight-bond Cluster Modelmentioning

confidence: 99%

The Development of Structure Model in Metallic Glasses

et al. 2017

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Metallic glasses (amorphous alloys) have grown from a singular observation to an expansive class of alloys with a broad range of scientific interests. Their unique properties require a robust understanding on the structures at the atomic level while alloys in this class have a similar outlook on the microstructure. In this review, we went through the history of the majority studies on the structure models of metallic glasses, and summarized their historical contributions to the understanding of the structure metallic glasses and the relationship between their structures and properties.

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Section: Tight-bond Cluster Modelmentioning

confidence: 99%

The Development of Structure Model in Metallic Glasses

et al. 2017

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“…Sufficient cooling rates are always necessary to bypass the crystallization process and to vitrify the molten alloy. BMGs lack long-range order of structure and crystal defects as opposed to crystalline materials, which gives them high hardness and strength, large elastic limit, and even pronounced plasticity under specific conditions [2,3]. For the past decades, great efforts have been made to explain and to explore the mechanical, physical and chemical phenomena of BMGs.…”

Section: Introductionmentioning

confidence: 99%

The Scavenging Effect of Different Rare-Earth Elements in the Low-Purity Zr50Cu40Al10 Alloy

Pajor

Rutkowski

Gondek

et al. 2022

Metall Mater Trans A

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Glass forming alloys are very sensitive to oxygen contaminations. Here, the oxygen scavenging effect of five rare-earth elements (RREs) was studied when added to the Zr50Cu40Al10 alloy, synthesized from commercially available zirconium. The effects of precise REEs additions (Y, Sc, Lu, Gd, Nd) with respect to the measured oxygen content, based on the stoichiometric relationship in the M2O3 oxide are reported. Additionally, the influence of double and triple RRE-to-oxygen ratios on the critical diameter (Dc) and other glass forming ability (GFA) indicators were investigated. To evaluate the GFA and phase transformations during heating, differential thermal analysis was performed along with neutron diffraction. The combination of these two techniques allowed to identify crystallization products and distinguish the differences in phase transformations of low and high oxygen-content alloys. Microstructural analysis was carried out by means of electron microscopy (SEM, STEM), supported by X-ray diffraction. The best oxygen scavengers were found to be rare-earths that form cubic sesquioxides, i.e. Y, Sc and Lu, allowing to increase Dc in the high oxygen Zr50Cu40Al10 alloy from 2.5 mm up to 8 mm (double stoichiometric concentration of Y-to-oxygen). Our results indicate that low purity alloys can be easily vitrified, highlighting their potential for wide commercialization.

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