Glass forming ability of the Zr 50 Cu 40 Al 10 alloy with two oxygen levels

Pajor, Krzysztof; Kozieł, Tomasz; Cios, Grzegorz; Błyskun, P.; Bała, P.; Zielińska‐Lipiec, A.

doi:10.1016/j.jnoncrysol.2018.05.034

Cited by 30 publications

(18 citation statements)

References 18 publications

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“…It is well known in the literature that oxygen has an essential effect on the glass forming ability [29,30]. Furthermore, the interface between an amorphous particle and its oxide layer can act as a heterogeneous nucleation site for crystallization during thermal annealing of the amorphous particle [31].…”

Section: Resultsmentioning

confidence: 99%

Influence of the Oxide and Ethanol Surface Layer on Phase Transformation of Al-Based Nanocomposite Powders under High-Energy Milling

Janovszky

2019

Materials

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Pure Al particles reinforced with amorphous-nanocrystalline Cu36Zr48Ag8Al8 particles composite powders were prepared by high-energy milling without and with ethanol. The mechanical milling procedures were compared so that in the case of dry milling the particle size increased owing to cold welding, but the crystallite size decreased below 113 nm. The amorphous phase disappeared and was not developed until 30 h of milling time. Using ethanol as a process control agent, the particle size did not increase, while the amorphous fraction increased to 15 wt.%. Ethanol decomposed to carbon dioxide, water, and ethane. Its addition was necessary to increase the amount of the amorphous structure.

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Section: Resultsmentioning

confidence: 99%

Influence of the Oxide and Ethanol Surface Layer on Phase Transformation of Al-Based Nanocomposite Powders under High-Energy Milling

Janovszky

2019

Materials

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“…Kündig et al [18] studied this correlation and obtained the maximum amorphous thickness in the Zr52.5Cu17.9Ni14.6Al10Ti5 alloy for stoichiometric and double stoichiometric Sc additions. There are many reports suggesting improved GFA of Zr-based BMGs doped with REEs, however, typically the obtained results were not directly correlated with oxygen content [18,19,[28][29][30][31][32][33][34][20][21][22][23][24][25][26][27]. Fig.…”

Section: Introductionmentioning

confidence: 99%

“…The use of purely monoclinic REOs is problematic as they are formed by elements with low boiling points (Sm and Eu) or by radioactive elements (Pm), therefore they were not studied here. In our previous works [19,36], efforts were made to characterize and enhance the GFA in the Zr50Cu40Al10 alloy through Y additions. It was found that the critical diameter Dc (diameter with a maximum amorphous thickness) strongly depends on the oxygen content, and the proper Y doping of a low purity (high oxygen) alloy allows to obtain a similar Dc value (improved from 3 mm to 7 mm) as in the high purity (low oxygen) alloy (8 mm).…”

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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“…does not affect the glass-forming ability (GFA) of Zr-based amorphous alloys. Pajor et al reported that GFA of Zr-based amorphous alloys is highly affected by oxygen content [12]. Zr oxides trigger heterogeneous nucleation-induced crystal phase formation, and substantially lower the critical dimension of the resultant alloys.…”

Section: Introductionmentioning

confidence: 99%

Design and characterization of novel zirconium-based amorphous alloys containing scandium for biomedical application

Cui

Zhang

Song

2021

Preprint

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In this work, (Zr55Cu30Al10Ni5)100−xScx (x = 0, 0.5, 1.0, and 1.5) amorphous alloys were fabricated through steel die casting. The effects of scandium on the properties of zirconium-based amorphous alloys have been studied. The results show that the glass-forming ability of amorphous alloys increases at first and then decreases with the increase of Sc content. The highest glass-forming ability is obtained when the atomic fraction of Sc is 0.5%, which enables the production of 2-mm-thick amorphous alloy ingots. Meanwhile, the thermal stability and mechanical properties of the alloy are optimised with the atomic fraction of Sc of 1.0%. In addition, by adding an appropriate amount of Sc, the corrosion resistance of Zr–Cu–Al–Ni alloys is enhanced, particularly in the acid solution. The lowest average corrosion rate for samples in acid solution is obtained with the alloy containing atomic fraction of Sc of 1.0%. Therefore, results of this study indicate that the Zr-based amorphous alloy containing scandium has the potential for manufacturing fracture internal fixation or surgical devices.

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Glass forming ability of the Zr 50 Cu 40 Al 10 alloy with two oxygen levels

Cited by 30 publications

References 18 publications

Influence of the Oxide and Ethanol Surface Layer on Phase Transformation of Al-Based Nanocomposite Powders under High-Energy Milling

Influence of the Oxide and Ethanol Surface Layer on Phase Transformation of Al-Based Nanocomposite Powders under High-Energy Milling

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

Design and characterization of novel zirconium-based amorphous alloys containing scandium for biomedical application

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