Article
Materials Science, Multidisciplinary
Yibo Du, Yanjun Zhou, Kexing Song, Tao Huang, David Hui, Haitao Liu, Chu Cheng, Jingzhao Yang, Liye Niu, Huiwen Guo
Summary: The Zr-containing precipitates in the Cu alloy first form coherent Zr-rich atomic clusters on the {111} crystal plane of copper during aging, which then transform into Cu5Zr phase as aging time increases. The contribution of Zr-rich atomic clusters and Cu5Zr precipitates to the yield strength of the alloy is calculated by coherency strengthening and Orowan strengthening, respectively. The total yield strength is very close to the experimentally measured strength.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Anna Bodyakova, Roman Mishnev, Andrey Belyakov, Rustam Kaibyshev
Summary: This study investigates the phase content and strengthening mechanism of two copper alloys, 0.1Cr-0.1Zr and 0.9Cr-0.1Zr, and finds that the size of second phase particles and the strengthening mechanism are closely related to the chromium content.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Engineering, Environmental
Yao Chen, Jinxin Zou, Jian Sun, Qiong Qin, Peijun Ji, Wei Feng
Summary: In this study, GO-inorganic hybrid nanoflowers were successfully prepared using non-enzymic Cu(II) and Zr(IV), achieving high catalytic conversion of 5-hydroxymethylfurfural. The synergistic catalysis of NECu(II) and Zr(IV) leads to the activation of encapsulated GO, generating hydroxyl radicals and oxygen. The persistent and efficient activation of encapsulated GO significantly enhances the conversion of 5-hydroxymethylfurfural.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Anton Kokalj, Chenyang Xie, Ingrid Milosev, Daniel Crespo
Summary: The study critically evaluates the correlations between corrosion inhibition efficiencies and DFT calculated molecular parameters for nine imidazole-based compounds on eight Cu/Zr materials in 3 wt% NaCl solution, considering 31 molecular parameters. It suggests that materials can be classified into two categories based on the effectiveness of molecular electronic parameters in QSAR models, and introduces a symmetrized inhibition efficiency metric to address the asymmetry in evaluating corrosion inhibitors and activators.
Article
Chemistry, Physical
Pavlo Kyriienko, Olga Larina, Dmytro Yu Balakin, Mykhailo Vorokhta, Ivan Khalakhan, Sergii A. Sergiienko, Sergiy O. Soloviev, Svitlana M. Orlyk
Summary: This paper presents the investigation of different component oxide systems in aqueous ethanol conversion into 1,3-butadiene, with a focus on the effect of lanthanum in the catalyst composition. The results show that high selectivity of 1,3-butadiene is achieved during the conversion of rectified and aqueous ethanol over the studied catalysts. The activity of the catalysts depends on the order of introducing the components, which determines the acid-base characteristics of the surface. The addition of lanthanum into Cu/Zr-Si catalysts increases their activity by forming lanthanum containing base sites that are tolerant to water. The differences in the interaction of reaction intermediates with surface Zr and La-containing sites are revealed, and the effect of water on the adsorption of carbon coke, ethoxy species, and acetaldehyde over the catalyst surface is demonstrated.
MOLECULAR CATALYSIS
(2022)
Article
Materials Science, Multidisciplinary
Takahiro Kunimine, Kenta Miyamoto, Kao Nakashima, Chihiro Watanabe, Ryoichi Monzen, Naokuni Muramatsu, Shinya Ueno
Summary: By comparing the test results of IA wire and S wire, it was found that IA wire exhibited lower ductility. The main reason for this difference is the higher proportion of void-containing eutectic particles in IA wire, which is mainly due to the larger recrystallized grain size generated by intermediate annealing, resulting in high stress concentration during subsequent wire drawing.
MATERIALS TRANSACTIONS
(2021)
Article
Materials Science, Multidisciplinary
Olga Mamzurina, Sayed M. Amer, Irina S. Loginova, Maria Glavatskikh, Andrey G. Mochugovskiy, Ruslan Yu Barkov, Andrey Pozdniakov
Summary: The effect of zirconium on the microstructure, phase composition, and mechanical properties of AlCuYb and AlCuGd alloys was investigated. AlCuYbZr/AlCuGdZr alloys exhibited higher hardness values and superior mechanical properties compared to AlCuYb/AlCuGd alloys. Specifically, the AlCuYbZr alloy showed higher yield and tensile strength and good mechanical properties at an annealing temperature of 100 degrees C.
Article
Nanoscience & Nanotechnology
Yanfang Wang, Xin Lin, Yufan Zhao, Qijuan Dong, Shuoqing Shi, Xuehao Gao, Haiou Yang, Weidong Huang
Summary: The effect of direct aging treatment on the microstructure and strengthening mechanisms of Zr-modified Al-Cu-Mg alloys fabricated by SLM was analyzed in this study. After direct aging treatment, the fine alpha-Al grains were maintained and the S'-Al2CuMg precipitates dissolved. The precipitation of secondary Al3Zr-L12 led to a larger increase in precipitation strengthening compared to grain boundary strengthening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Kao Nakashima, Takahiro Kuimine, Ryoichi Monzen, Naokuni Muamatsu, Shinya Ueno
Summary: The effects of microstructure on the strength and electrical conductivity of copper-zirconium alloy wires were investigated. It was found that the wires with a higher drawing ratio had higher 0.2% proof stress and tensile strength, but lower electrical conductivity. The presence of fibrous and granular eutectics in the microstructure significantly increased the electrical conductivity.
MATERIALS TRANSACTIONS
(2023)
Article
Engineering, Chemical
Li Ding, Yongde Yan, Valeri Smolenski, Alena Novoselova, Yun Xue, Fuqiu Ma, Milin Zhang
Summary: The electrochemical behavior of Zr(IV) ions in LiCl-KCl molten salt solutions was studied on inert and active electrodes, revealing the reduction process and formation of intermetallic compounds under different electrode conditions. The nucleation of Zr was determined by comparison of experimental results with theoretical models. Metals Zr and Cu5Zr alloy were successfully extracted from the molten salt via potentiostatic electrolysis.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Kenta Miyamoto, Takahiro Kunimine, Chihiro Watanabe, Ryoichi Monzen, Reza Gholizadeh, Nobuhiro Tsuji
Summary: In this study, the microstructural evolution, hardness, and electrical conductivities of a cast hypoeutectic Cu-2.7at%Zr alloy processed by high-pressure torsion (HPT) were investigated. It was found that the eutectic in the alloy was severely sheared and elongated along the rotational direction with increasing HPT-revolutions. The mechanical dissolution of Cu5Zr phase was confirmed, leading to the formation of a nanocrystalline Cu-Zr supersaturated solid-solution alloy.
MATERIALS TRANSACTIONS
(2023)
Article
Chemistry, Analytical
Yuji Ikeda, Joey Kim Soriano, Ikuo Wakaida
Summary: This study investigates the effects of microwaves on plasma emission intensity between Zr metal and Zr oxide using microwave-enhanced laser-induced breakdown spectroscopy (MWE-LIBS) for analyzing nuclear fuel debris mixtures. The results show that microwaves can enhance Zr excitation and ionization in both metals and oxides. The use of MWE-LIBS significantly increases Zr emission lines, leading to a higher signal-to-noise ratio (SNR) across all sample types. This study highlights the effectiveness of MWE-LIBS in analyzing Zr metals and oxides in nuclear fuel debris.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Chemistry, Physical
Nataliya V. Maksimchuk, Vasilii Yu. Evtushok, Olga V. Zalomaeva, Gennadii M. Maksimov, Irina D. Ivanchikova, Yuriy A. Chesalov, Ilia V. Eltsov, Pavel A. Abramov, Tatyana S. Glazneva, Vadim V. Yanshole, Oxana A. Kholdeeva, R. John Errington, Albert Sole-Daura, Josep M. Poblet, Jorge J. Carbo
Summary: Zr-monosubstituted Lindqvist-type polyoxometalates have been used as molecular models to investigate the mechanism of hydrogen peroxide activation over Zr(IV) sites. These compounds catalyze the epoxidation of unfunctionalized alkenes and show increased activity with acid additives. The interaction with H2O2 results in the formation of various peroxo derivatives, with different species showing different reactivity towards oxygen transfer reactions.
Article
Materials Science, Coatings & Films
C. da Silva Oliveira, D. Martinez-Martinez, L. Cunha, S. Lanceros-Mendez, P. Martins, E. Alves, N. P. Barradas, M. Apreutesei
Summary: In this study, Zr-O-N films containing Ti were prepared by adding Ti ribbons on the racetrack of a Zr target during reactive magnetron sputtering. The addition of Ti ribbons prevented the target from being poisoned, especially at lower target currents, leading to a more controlled sputtering process. The color and electrical properties of the films were found to be closely related to the oxygen-to-metal ratio, while the N concentration did not have a significant impact.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Yanfang Wang, Xin Lin, Yufan Zhao, Qian Wang, Zhe Feng, Haiou Yang, Weidong Huang
Summary: In this study, a selective laser melted Al-Cu-Mg-Zr alloy is reported to have good yield strength and elongation at 150 degrees C, attributed to the effects of S' and omega precipitates. The alloy exhibits comparable tensile properties to cast and extruded Al-Cu-Mg-Ag alloys and higher properties than wrought 2024-T6, 2219-T62/T851, and 2618-T61 alloys. This research provides a potential strategy for developing new Al alloys with excellent moderate-temperature properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)