Article
Metallurgy & Metallurgical Engineering
Yanghuan Zhang, Xin Wei, Wei Zhang, Zeming Yuan, Jinliang Gao, Huiping Ren
Summary: In this study, mechanical grinding was used to fabricate Mg-based alloys with the addition of TiO2 and La2O3 catalysts, which were found to enhance grinding efficiency, activation performance, reaction kinetics, and reduce hydrogen desorption activation energy. The particle sizes of the alloys with catalysts were significantly reduced compared to the alloy without catalysts, and the hydrogen release time and hydrogenation enthalpy change were also affected by the presence of TiO2 and La2O3.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Nanoscience & Nanotechnology
Deping Zhang, Jinhui Zhang, Tao Xu, Yaqin Zhang, Chaojie Che, Dongdong Zhang, Jian Meng
Summary: This paper presents a new mechanism for increasing the creep resistance of magnesium alloys, namely reducing the minimum creep rate by introducing nano-spaced stacking faults. The finding provides a reference for developing magnesium alloys with superior creep resistance.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Junxian Zhang, Veronique Charbonnier, Nicolas Madern, Judith Monnier, Michel Latroche
Summary: A(2)B(7) compounds are widely studied as active materials for the negative electrode in Ni-MH batteries, with potential for improved properties through adjustments in the composition of rare earth or Mg (A) and transition metal (B). By investigating various pseudo-binary systems, it was found that the composition significantly affects the physicochemical properties of La2Ni7-based compounds, with quaternary compounds showing drastically improved hydrogen sorption properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Metallurgy & Metallurgical Engineering
Yuxuan Liu, Yangxin Li, Qingchun Zhu, Huan Zhang, Xixi Qi, Duofei Zheng, Yunliang Li, Dezhi Zhang, Xiaoqin Zeng
Summary: The local deformation behavior and dynamic recrystallization of shock compressed Mg-1Zn alloy were investigated using EBSD and TEM. The suppression of dislocation slipping and twinning during high strain-rate deformation activated a more flexible kinking deformation, facilitating slipping and twinning within the kinks. The kink bands evolved into deformation bands with recrystallized nano-grains due to slow heat dissipation and local temperature elevation. This finding provides a new perspective on kinking-facilitated nanocrystallization in Mg alloys and other anisotropic metallic materials.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Physical
Miao Guo, Huiping Yuan, Yuru Liu, Lijun Jiang
Summary: The partial substitution of Sm for Y in La-Y-Ni-based alloys improves their anti-corrosion and anti-pulverization performances, thereby increasing cycle life. Compared to (RE0.85Mg0.15)(2)(NiAl)(7) alloys, RE-Y-Ni-based alloys exhibit better crystal structure stability, but worse gas-solid and electrochemical cyclic stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Yichao Xie, Guanjiu Wu, Yuan Li, Yongxi Zhang, Qing Wang, Lu Zhang, Shumin Han
Summary: This study used a low-cost YFe0.85 master alloy to improve the cycling stability of La-Mg-Ni-based hydrogen storage alloys. The prepared alloys showed good cycling stability, higher capacity, and satisfactory kinetics.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Nanoscience & Nanotechnology
Bing Han, Shaobo Yu, Hui Wang, Yanshan Lu, Huai-Jun Lin
Summary: In this study, Mg85Ni14Ce1 amorphous alloy films with different thicknesses were prepared, and the nanosize effect on hydrogen desorption and cycling properties was investigated. It was found that as the size decreases, the hydrogen storage kinetics of the alloy greatly increase, and the nanosized amorphous alloys can reversibly absorb and desorb hydrogen at a low temperature. Moreover, the alloy structure can be fully recovered after hydrogen absorption and desorption cycles. Therefore, nanosized amorphous alloys are promising candidates for reversible hydrogen storage applications.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
Pan Deng, Wenfeng Mo, Zuoqiong Ouyang, Junwei Chen, Binghui Luo, Zhenhai Bai
Summary: In this study, the effects of adding Zr to Al-3.8Cu-1.2Mg alloys on microstructural evolution, intergranular corrosion, electrochemical corrosion, and chemically-milled surface roughness were investigated. The experimental results showed that the addition of 0.2 wt% Zr could refine the grain size, improve solidification segregation, increase the spacing of grain boundary precipitation phases, enhance corrosion resistance, and optimize the chemically-milled surface roughness. This finding provides a valuable strategy for achieving high corrosion resistance and superior chemically-milled surface roughness properties in aircraft skin materials for the aerospace field.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yuqing Qiao, Congcong Du, Jingjing Tang, Peng Jia, Xiaoyu Zhang, Jing Wang, Shuaijun Ding, Yixuan Wen, Changzeng Fan, Liqiang Zhang, Jianyu Huang, Tongde Shen
Summary: This study utilized advanced electron microscopy to reveal micron/nano-scale hierarchical structures in vanadium-based alloys, highlighting the essential role of nanoprecipitates in hydrogen storage. The findings challenge conventional understanding of microstructures in MVAs and may guide the development of nanostructured hydrogen storage materials for practical applications.
Article
Chemistry, Physical
Hao Pang, Quanan Li, Xiaoya Chen, Peijun Chen, Xiangyu Li, Jinfeng Tan
Summary: The deformation behavior of Mg-Gd-Y(-Sm)-Zr alloys during high-temperature uniaxial compression was investigated. The dynamic recrystallization critical strain was calculated and verified. The hot deformation activation energy and constitutive equation were calculated, and the effect of Sm on microstructure evolution was analyzed. The results showed that the addition of Sm increased flow stress and delayed dynamic recrystallization.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Tianxu Zheng, Yaobo Hu, Bin Jiang, Liang Fu, Fusheng Pan, Aitao Tang
Summary: This study investigates the impact of Gd elements on the enhancement of ductility in the Mg-Gd-Zr alloy. It was found that Gd elements can reduce the critical resolved shear stress (CRSS) ratio between non-basal slip and basal slip, facilitating the initiation of more non-basal slip systems to accommodate strain. Furthermore, the segregation of Gd elements at grain boundaries was observed to enhance the grain boundary strength of the alloy, which is a significant factor in the enhancement of ductility.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Jiri Cermak, Lubomir Kral, Pavla Roupcova
Summary: The study investigates the effect of the chemical composition of Mg-xCu based alloys modified by KCl on their hydrogen storage performance. It was found that an unknown Cu-rich phase exhibited a catalytic effect on desorption, and the activation energy of hydrogen desorption decreased with increasing Cu content x.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Yanghuan Zhang, Wei Zhang, Xin Wei, Zeming Yuan, Jingliang Gao, Shihai Guo, Huiping Ren
Summary: The addition of TiO2 in magnesium based materials improves the efficiency of mechanical milling and enhances the hydrogen storage performance, especially in the as-milled (x = 5) alloy. The alloy exhibits an amorphous and nanocrystalline structure, and the TiO2 content has a slight effect on the thermodynamic properties of the alloys. The optimal hydrogen storage property is shown in the as-milled (x = 5) alloy due to its minimum dehydrogenation apparent activation energy.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
M. R. Gazizov, A. N. Belyakov, R. Holmestad, M. Yu. Gazizova, V. S. Krasnikov, P. A. Bezborodova, R. O. Kaibyshev
Summary: The deformation behavior of {111}Al omega plates in an Al-Cu-Mg-Ag alloy was analyzed using atomic-resolution scanning transmission electron microscopy (STEM). The transition from particle shearing to Orowan dislocation loop formation was observed at critical plate thicknesses of 3 and 3.5 cθo (2.54-2.97 nm) when considering the omega phase as consisting of the orthorhombic theta lattice (θo). For thinner plates, a full dislocation allowed particle segments to shift relative to each other in planes orthogonal to the particle habit plane. Thicker plates exhibited dislocation loops consisting of two segments with jogs, causing particle segmentation and deviation from the Al/omega orientation relationship.
Article
Materials Science, Multidisciplinary
Bernhard Trink, Irmgard Weissensteiner, Peter J. Uggowitzer, Katharina Strobel, Anna Hofer-Roblyek, Stefan Pogatscher
Summary: This study introduces new alloys that combine the age-hardening capability of Al-Mg-Si alloys with the microstructure-controlling effect on processing of primary Fe-rich intermetallic phases used in foil stock. Processing and microstructure-property relations in new crossover aluminum alloys derived from 6xxx and 8xxx foil stock alloys are shown. The study demonstrates the attractive combinations of strength and ductility achieved in these new alloys.
Article
Chemistry, Physical
Long Luo, Yiming Li, Zeming Yuan, Suxia Liu, Ajit Singh, Fei Yang, Baoquan Li, Lirong Li, Yongzhi Li
Summary: In this study, medium entropy solid solution alloys were designed and investigated. The alloys with nanocrystals exhibited excellent hydrogen absorption kinetics, showing shorter uptake time and higher capacity than reported alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Nahong Song, Yusheng Wang, Zeming Yuan, Fei Wang
Summary: In this study, density functional theory simulations were used to investigate the properties of the AlN@BSe vertical heterostructure. The results show that the AlN@BSe is mechanically stable and has improved in-plane stiffness compared to pure BSe and AlN monolayers. It exhibits strong infrared light absorption and can undergo band gap transitions under certain conditions. The diverse electronic properties make it highly promising for novel nano-electronic applications.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Zhonggang Han, Zeming Yuan, Tingting Zhai, Dianchen Feng, Hao Sun, Yanghuan Zhang
Summary: In this paper, an experimental alloy with the standard composition of Ti1.1-xZr0.1YxFe0.6-Ni0.3Mn0.2 (x = 0-0.08) was synthesized and studied. The addition of rare earth element Y significantly improved the activation properties and hydrogen absorption/desorption kinetics of the alloy. The microstructure, phase composition, and hydrogen storage properties were characterized using various techniques.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Zeming Yuan, Yongqi Sui, Qian Yuan, Zhen Qi, Tingting Zhai, Xiaoming Li, Tao Li
Summary: TiFe alloy can store hydrogen at room temperature and low pressure, but it requires activation at high pressure and temperature. Ball milling treatment improves the hydrogen storage performance of TiFe alloy and reduces the activation time. The activation time of Ti21.7Y0.3Fe16Mn3Cr alloy with a milling time of 0.75 hours is only 4 minutes.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Xiaoming Li, Zeming Yuan, Yi Li, Guofu Sun, Chunyu Wang, Hang Yang
Summary: Nano-SiOX doped carbon composites were successfully synthesized and their properties were improved by heat treatment. The doped carbon can reduce the resistance and buffer the volume effect of lithium embedding, thereby improving the cycle life of the battery. Higher heat treatment temperature enhances the specific capacity of the material and improves the first charge-discharge capacity retention rate.
Article
Electrochemistry
Zhong-gang Han, Ting-ting Zhai, Ze-ming Yuan, Fu-chen Liu, Dian-chen Feng, Hao Sun, Yang-huan Zhang
Summary: The effects of ball milling time on the phase structure, microscopic morphology, and electrochemical properties of a Ti1.04Zr0.1La0.06Fe0.6Ni0.3Mn0.2 hydrogen storage alloy were investigated. Short-time high-energy ball milling was found to improve the electrochemical properties of the alloy by changing its phase structure and reducing the particle size.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2022)
Article
Chemistry, Physical
Chen Li, Xin Gao, Bingjie Liu, Xin Wei, Wei Zhang, Yong Lan, Haiyan Wang, Zeming Yuan
Summary: In this study, the addition of Zr element to TiFe-based hydrogen storage alloys significantly shortened the activation time and reduced the plateau pressure, improving the activation properties of TiFe-based alloys.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Zeming Yuan, Chen Li, Tao Li, Tingting Zhai, Yongqi Sui, Xiaoming Li, Dianchen Feng, Yanghuan Zhang
Summary: Sm5Mg41 + x wt% nano-graphite (NG) composites were synthesized via ball-milling, and the influences of NG content on microstructure and hydrogen storage properties were systematically investigated. The composites consisted of Mg, Sm5Mg41, SmMg3, and NG. Nano scale Sm3H7 and MgH2 phases were observed after hydrogen absorbing, and newly formed Mg phase and remaining Sm3H7 phase appeared after hydrogen desorbing. NG was embedded in the surface of the composites as nanosheets. The presence of microscopic defects and nanocrystalline boundaries improved the hydrogen storage kinetics of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Chen Li, Yong Lan, Xin Wei, Wei Zhang, Bingjie Liu, Xin Gao, Zeming Yuan
Summary: This paper studies the effect of trace amount of Y element on the hydrogen storage properties and microstructure of Ti1.1Fe0.8Mn0.2 alloy. The addition of Y significantly improves the activation property of the alloy and enhances the hydrogen absorption capacity. The Ti1.08Y0.02Fe0.8Mn0.2 alloy shows excellent performances at room temperature, approaching the theoretical hydrogen storage capacity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Xin Wei, Chen Li, Yan Qi, Zeming Yuan, Qilu Ge, Yanghuan Zhang, Jun Li
Summary: In this study, Fe@C catalyst prepared by chemical blow molding carbonization was combined with mechanical milling to improve the hydrogen storage properties of Mg91Al5Y4 ternary alloy. The Fe@C catalyst has effectively catalytic impact on hydrogen storage kinetics, reducing the activation energy and initial dehydrogenation temperature. However, the influence of Fe@C content on thermodynamics is not very obvious.
MATERIALS CHARACTERIZATION
(2022)
Article
Green & Sustainable Science & Technology
Yongyan Xu, Yuan Deng, Wei Liu, Xin Zhao, Jin Xu, Zeming Yuan
Summary: Hydrogen energy, with its zero pollution, has become one of the most ideal energy sources. However, the difficulty of storage and transportation hampers the development of hydrogen energy. This paper summarizes metal hydrogen storage materials, including metal alloys and metal-organic frameworks. Among them, TiFe-based hydrogen storage alloys show promise due to their reversible hydrogen absorption and desorption at room temperature and low pressure. The paper reviews methods to improve the hydrogen storage performance of TiFe-based alloys, such as high energy ball milling and the introduction of transition metals and rare earth elements with high valence and affinity for hydrogen.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Electrochemistry
Wei Zhang, Zeming Yuan, Dongliang Zhao, Jun Li, Zhonghui Hou, Yan Qi, Yanghuan Zhang
Summary: A surface-modified La9CeMg80Ni5-GR-Ni composite was prepared and the effects of milling time and Ni content on the structure and electrochemical properties were investigated. The results showed that with the increase of Ni content, the discharge capacity, HRD, and capacity retention rate of the 40 h-milled composites increased from 219.6 to 986.2 mAh/g, from 75.3% to 86.8%, and from 58.2% to 65.8% after 20 cycles, respectively. Similarly, the 80 h-milled composites exhibited increased discharge capacity, HRD, and capacity retention rate from 252.6 to 1034.7 mAh/g, from 80.5% to 87.9%, and from 47.3% to 56.2% after 20 cycles, respectively.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2023)
Article
Chemistry, Physical
Wei Zhang, Dongliang Zhao, Jun Li, Zeming Yuan, Shihai Guo, Yan Qi, Yanghuan Zhang
Summary: Ball milling Mg-based alloys with transition metal compounds enhances their hydrogen storage performances. In this experiment, La1.7Y0.3Mg16Ni + x wt.% TiF3 (x = 0-10) alloys were prepared using mechanical milling technology. XRD, SEM, HRTEM, and granulometry were used to analyze the composition and microstructure. The addition of TiF3 improves the crystallinity, reduces particle and crystallite sizes, and enhances hydriding and dehydriding kinetics. Adding 7 wt% TiF3 decreases the dehydrogenation activation energy and improves the hydrogen absorption rate at low temperatures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Yan Qi, Xin Zhang, Wei Zhang, Jun Li, Zeming Yuan, Shihai Guo, Yanghuang Zhang
Summary: In this study, a quaternary alloy La7Sm3Mg80Ni10 was prepared using casting and ball milling procedures, and the structural changes during hydrogen sorption and desorption were investigated. The results showed that ball milling reduced the grain and particle size and altered their surface properties. Compared to the as-cast alloy, the as-milled alloy absorbed 4 wt% H2 in shorter times at different temperatures. The as-milled and as-cast alloys exhibited similar dehydrogenation enthalpy change (ΔH) and apparent activation energies for dehydrogenation (Ede).
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Zhonggang Han, Tingting Zhai, Zeming Yuan, Fuchen Liu, Dianchen Feng, Hao Sun, Yanghuan Zhang
Summary: In this paper, Ti1.04Zr0.1La0.06Fe0.6Ni0.3Mn0.2 + x wt% Ni (x = 0, 2, 5, 7, 10) composites were prepared by ball milling and the effects of Ni powder addition on the structure, morphology and electrochemical properties of the alloy were investigated. The results showed that increasing the Ni powder addition improved the uniformity of Ni powder coating on the alloy surface, resulting in significantly improved discharge capacity, cycling stability, and high-rate discharge performance. The uniform coating of Ni powder with high electrical conductivity and excellent electrocatalytic activity on the alloy surface is the primary factor for the enhanced electrochemical properties of the Ni composite.
MATERIALS TODAY COMMUNICATIONS
(2023)