Microstructure evolution in CuZrAl alloys during ball-milling

Tomolya, Kinga; Janovszky, D.; Benke, Márton; Sycheva, Anna; Svéda, Mária; Ferenczi, Tibor; Pekker, Péter; Cora, Ildikó; Roósz, András

doi:10.1016/j.jnoncrysol.2013.10.010

Cited by 7 publications

(2 citation statements)

References 18 publications

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“…Meanwhile, the nanocrystalline phases may be identified as CuZr 2 and B2–CuZr based on the corresponding SAED patterns (Figures d and S1). − In general, the B2–CuZr phase is a high-temperature stable phase, which is broken down into two CuZr 2 and Cu 10 Zr 7 phases due to the eutectoid transformation under equilibrium solidification conditions …”

Section: Resultsmentioning

confidence: 99%

Copper Nanocomposites In Situ Formed from Metallic Glasses for an Efficient Catalytic Performance

Zhao

Zeng

et al. 2022

ACS Appl. Mater. Interfaces

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Metallic glasses (MGs) with the unique long-range disordered and short-range ordered atomic structure have attracted extensive attention in the field of environmental catalysis due to their advanced catalytic capability. Herein, CuZr-based MGs are first proven to exhibit superior catalytic performance toward the degradation of organic pollutants compared to the annealed ribbons with different crystal structures; many Cu nanocomposites are gradually in situ precipitated on the surface of the ribbons. The enhanced catalytic behavior is mainly attributed to the random atomic packing structure accelerating electron transport and providing sufficient active sites. On the other hand, the active species, for example, •OH, •O 2 − , and Cu(III), are generated through an activation reaction between Cu/Cu 2 O nanocomposites and H 2 O 2 molecules for the catalytic degradation process. Additionally, further investigation indicated that CuZr-based MGs also present superior stability and durability along with an approximate 96% degradation efficiency within 10 min at the 10th run. This research can successfully explain why MGs have a little higher catalytic reactivity than their crystalline counterparts, and more importantly, it will provide a new strategy for the preparation of catalytic materials for wastewater treatment.

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Section: Resultsmentioning

confidence: 99%

Copper Nanocomposites In Situ Formed from Metallic Glasses for an Efficient Catalytic Performance

Zhao

Zeng

et al. 2022

ACS Appl. Mater. Interfaces

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“…At the end of the process, the initial phases disappear due to the transmitted energy of the milling. Coalescence and fragmentation of the particles keep balance owing to the repeated mechanical mixing, cold welding, and fracturing [21,22].…”

Section: Introductionmentioning

confidence: 99%

Studying amorphization progress in Cu—Zr—Al-based powders during ball milling

Tomolya¹,

Janovszky²,

Sycheva³

et al. 2016

Resolution and Discovery

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Six compositions in (Cu 49 Zr 45 Al 6 ) 100 − x − y Ni x Ti y (x = 0, 5, 10; y = 0, 5, 10) system were selected in order to investigate the amorphization progress caused by milling. The initial structure of the powders before milling, type, and composition of the phases and their influence on the amorphization process were examined. CuZr phase was found to be determinative phase of amorphization process; however, its size does not influence it significantly in this system. CuZr fully dissolved the alloying elements, so that Ni and Ti phases do not appear as independent phases. In most cases, after 15 h of milling, the powders had amorphous structure with a few nanosized crystalline particles. It was shown that addition of both 10% Ti and 10% Ni to the alloy was an optimum condition to get stable, amorphous structure already after 12 h of ball milling.

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