The effect of oxygen on phase formation in an industrial Zr based bulk metallic glass

Zhou, Weihu; Meng, Y.H.; Duan, F.H.; Huang, Wei; Yao, Jiahao; Pan, Jie; Wang, Yinxiao; Yi, Li

doi:10.1016/j.intermet.2020.107055

Cited by 20 publications

(6 citation statements)

References 29 publications

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“…Only for higher REE-to-oxygen variants does the B2 CuZr phase become dominant. Zhou et al showed that the size and lattice parameter of the τ3 phase increase with increasing oxygen levels [47]. According to that study, this phase consumes oxygen from the solution, allowing the rest of the liquid to vitrify.…”

Section: B Structure and Microstructure Investigationsmentioning

confidence: 98%

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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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Section: B Structure and Microstructure Investigationsmentioning

confidence: 98%

“…It means that the τ3 phase probably has a much higher melting point compared to the matrix. There are some works that have studied the τ3 phase [12,[47][48][49], however, future research towards constructing its unit cell and recognizing its basic physical properties should be performed.…”

Section: B Structure and Microstructure Investigationsmentioning

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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“…One of the elements present as an impurity in most BMGs is oxygen. Oxygen encourages the crystallization of BMGs by acting as a preferential site for nucleation of metastable quasicrystals, and reduces the GFA [37,152,153]. Industrial-grade BMGs, such as AMZ4, have a high oxygen content.…”

Section: Change In the Chemical Compositionmentioning

confidence: 99%

Additive Manufacturing of Bulk Metallic Glasses—Process, Challenges and Properties: A Review

Sohrabi

Jhabvala

Logé

2021

Metals

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Bulk Metallic Glasses (BMG) are metallic alloys that have the ability to solidify in an amorphous state. BMGs show enhanced properties, for instance, high hardness, strength, and excellent corrosion and wear resistance. BMGs produced by conventional methods are limited in size due to the high cooling rates required to avoid crystallization and the associated detrimental mechanical properties. Additive manufacturing (AM) techniques are a potential solution to this problem as the interaction between the heat source, e.g., laser, and the feedstock, e.g., powder, is short and confined to a small volume. However, producing amorphous parts with AM techniques with mechanical properties comparable to as-cast samples remains a challenge for most BMGs, and a complete understanding of the crystallization mechanisms is missing. This review paper tries to cover recent progress in this field and develop a thorough understanding of the correlation between different aspects of the topic. The following subjects are addressed: (i) AM techniques used for the fabrication of BMGs, (ii) particular BMGs used in AM, (iii) specific challenges in AM of BMGs such as the control of defects and crystallization, (iv) process optimization of mechanical properties, and (v) future trends.

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“…Zr-based amorphous alloys have strong glass-forming ability, which has attracted extensive attention from researchers in recent years [18][19][20]. It was established that Zrbase amorphous alloys could be fabricated at low cooling rates due to their improved amorphous-forming ability [21][22][23]. Moreover, Zr-based bulk amorphous alloys have a series of excellent properties, for example, high hardness, good wear resistance and corrosion resistance, low thermal expansion coefficient, etc.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Response of Zr51.9Cu23.3Ni10.5Al14.3 Metallic Glass Ribbon under Varying Strain Rates

Li,

Wu,

et al. 2024

Metals

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In this work, we investigated the mechanical behavior of a low-cost Zr51.9Cu23.3Ni10.5Al14.3 (at. %) metallic glass ribbon prepared with industrial-grade material through the melt-spinning method. The ribbons have good appearances and almost no defects. The mechanical behavior associated with the corresponding microstructure of the ribbon was tested at different strain rates. Striation and veining patterns were observed in the crack propagation zone and the fast fracture zone. The results show that the tensile strength of the ribbons exceeds 1 GPa. Therefore, they are considered to have good potential for industrial applications. This study could contribute to the preparation of low-cost bulk metallic glass.

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The effect of oxygen on phase formation in an industrial Zr based bulk metallic glass

Cited by 20 publications

References 29 publications

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

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

Additive Manufacturing of Bulk Metallic Glasses—Process, Challenges and Properties: A Review

Mechanical Response of Zr51.9Cu23.3Ni10.5Al14.3 Metallic Glass Ribbon under Varying Strain Rates

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