Article
Materials Science, Ceramics
Si-Yi Chen, Tian-Yu Liu, Feng Gu, Shu Wang, Ji-Bing Sun, Chun-Xiang Cui
Summary: The study investigates the structure and magnetic properties of Sm10Co60Fe15(Al, B)(15) amorphous-nanocrystalline ribbons and finds that different Al and B contents alter the liquid state, phase composition, and final microstructure of the ribbons. It is discovered that B-rich ribbons exhibit higher hard magnetic properties than Al-rich ones.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Wenfeng Zhang, Yang Meng, Jianfeng Wang, Shaokang Guan, Tao Zhang
Summary: This paper investigates a new heat treatment method to inhibit the brittleness caused by annealing in Fe-based amorphous alloys. By using a self-designed continuous rapid annealing equipment, the amorphous precursors were rapidly annealed at 773K for 0.3 s, resulting in the formation of a-Fe phase with a size of 2 to 5 nm. The ribbon sample exhibits high saturation magnetization and low coercivity, as well as good bending ductility.
Article
Chemistry, Physical
C. Y. Zhang, G. Yuan, Y. X. Zhang, C. Y. Liu, Y. Wang, F. Fang, G. D. Wang, Y. Y. Pang
Summary: This study utilized the twin-roll strip-casting technique to produce high-energy state Zr55Cu30Al10Ni5 (at%) amorphous alloy sheets, and investigated the impact of alloy melt temperatures on microstructure. The fabricated amorphous alloy sheets exhibited significant plasticity at room temperature through the formation and cross growth of multiple shear bands. The appropriate crystalline particles in the alloys could impede the linear propagation of shear bands and contribute to work-hardening, but also accelerated fracturing with increased deformation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Waris Nawaz Khan, Rahul Chhibber
Summary: This experimental work investigates the effect of filler metal on the dissimilar weld between super duplex stainless 2507 and high strength low alloy API X70 steel. It was found that 309L filler produces skeletal ferrite morphology in the weld, while 2594 filler solidifies with precipitation of multiple reformed austenites in the ferrite matrix. Additionally, 309L filler weld exhibits superior mechanical properties, while 2594 filler provides better pitting corrosion resistance due to high chromium concentration in the weld zone.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Quanbo Kuang, Richu Wang, Chaoqun Peng, Zhiyong Cai
Summary: The microstructural evolution and mechanical properties of Al-Mg-Li-Sc-Zr alloys fabricated by ingot metallurgy and gas atomization with hot isostatic pressing were investigated. The HIPed alloy exhibited a fine and uniformly structured microstructure with high strength attributed to grain boundaries, precipitation, and solid-solution strengthening mechanisms. The number fraction of the Al3(Sc, Zr) phase in the HIPed alloy was higher compared to the as-cast alloy, leading to an excellent ultimate tensile strength of 352 MPa.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Gexin Li, Pengchao Zhang, Jian Chang, Haipeng Wang
Summary: The effect of particle diameter on the solidified microstructure and mechanical properties of Zr50Cu40Al10 and Zr49Cu46Al5 alloys was studied. The results showed that as the particle diameter decreases, the solidified microstructure of the alloys gradually evolves from crystalline to completely amorphous, and the grain size becomes finer. The micro mechanical properties of amorphous composite microstructures are superior to the single component composition of crystalline or amorphous phase, and the reinforcement effect of the amorphous phase is related to the content of the second crystalline phase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
S. Zhang, F. L. Wang, J. W. Lv, Z. L. Shi, H. R. Zhang, X. Y. Zhang, M. Z. Ma
Summary: Experimental investigation showed that rapid cooling of Zr50Cu34Al8Ag8 amorphous alloy after continuous heating to 450 degrees Celsius resulted in the best mechanical properties due to the formation of 4.65% ordered crystal structures in the amorphous matrix. However, when the heating temperature increased to 480 degrees Celsius, a large quantity of hexagonal Al2Zr and Ag2Al phases precipitated in the amorphous matrix, leading to deterioration of the alloy properties.
Article
Engineering, Geological
Yitian Xu, Yan Zhang, Junjie Huang, Guoqing Chen
Summary: This study investigated the effects and processes of water-glass-cured sandy soil by conducting direct shear tests and uniaxial compressive strength tests. The relationships between modulus, Baume degree, curing time, and strength of cured sandy soil were summarized from a macroscopic mechanical point of view. The consolidation evolution of cured sandy soil, including pore structure and gel state, was revealed from a microscopic point of view using nuclear magnetic resonance (NMR) imagery and scanning electron microscopy (SEM). The results showed that the migration of water glass and the deepening of curing are key processes controlling the consolidation effect. The state of the silica gel plays a decisive role in the strength of the cured sandy soil.
ENGINEERING GEOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Murtatha M. Jamel, Hugo Lopez, Benjamin Schultz, Wilkistar Otieno
Summary: The research investigated the influence of different cooling rates on the strength of pure Mg, finding that increasing the solidification rate can enhance hardness and ultimate tensile strength. In addition, improving grain structure can help to improve the mechanical properties of the material.
Article
Chemistry, Physical
Dehui Lan, Rui Gao, Xudong Liu, Luyi Zhu, Yongting Zheng, Juncheng Liu
Summary: ZrO2 fiber toughened and non-fiber toughened Al2O3/ZrO2(Y2O3) directionally solidified eutectic ceramics (DSECs) were prepared and their microstructures and mechanical properties were investigated. Both types of DSECs had similar colony structures composed of α-Al2O3, c-ZrO2, and m-ZrO2. The phase spacing decreased with the growth rate and the fiber toughened DSECs showed higher fracture toughness compared to non-fiber toughened DSECs due to crack deflection, bifurcation, and fiber debonding mechanisms.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yongzhe Wang, Wei Li, Hong Yuan, Hongsheng Ding, Ruirun Chen, Jingjie Guo, Hengzhi Fu
Summary: In this study, Ti46Al8Nb0.9B alloys were continuously solidified by electromagnetic cold crucible, leading to a more refined and homogeneous microstructure with improved mechanical properties.
Article
Materials Science, Ceramics
Zhengqing Cai, Song Kang, Jingwang Lv, Shan Zhang, Zhilin Shi, Yujing Yang, Mingzhen Ma
Summary: In this study, different contents of remelting materials were added to the Zr34Ti32Cu9Fe4Be21 amorphous alloy, and the effects on the microstructure, mechanical properties, and thermal stability of the amorphous alloy gear castings were investigated. The results showed that the addition of remelting materials increased the fracture strength but decreased the plastic deformation ability. The glass transition temperature and crystallization temperature also increased with the increasing remelting material content.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Dilip Kumar Meena, Rapaka S. C. Bose, S. Vinoth, K. Annapurna, K. Ramesh
Summary: This study prepared n-type Bi2Te3 alloy using different quenching mediums and investigated the influence of melt solidification rate on its structure and thermoelectric transport properties. The moderate cooling rate of melt solidification showed the highest zT value.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Physical
Hamed Aghajani Derazkola, Eduardo Garcia, Arameh Eyvazian, Mohammad Aberoumand
Summary: The study welded dissimilar sheets using cooling-assisted friction stir welding, with water-cooled sample showing the best macrograph and highest tensile strength.
Article
Chemistry, Multidisciplinary
Dazhi Wu, Keyu Chen, Zilong Zhang, Lifu Chang
Summary: The study investigates the effect of additive type and mass fraction on the microstructure and mechanical properties of solidified sandy silt, determining the optimal contents of additives. The improvement of additive-modified OPC solidified sandy silt is attributed to the formation of crystalline compounds or composition improvement through field emission scanning electron and X-ray diffraction analysis.
APPLIED SCIENCES-BASEL
(2021)
Article
Metallurgy & Metallurgical Engineering
Bo Song, Meng Wang, Ruolan Shi, Zhiwen Du, Ning Guo, Fang Wang, Shengfeng Guo
Summary: In this study, a rolled AZ31 bar with c-axis//ND texture was treated by side-rolling and reciprocating torsion. The microstructure and tensile-compressive properties were investigated. The initial rolled bar exhibits yield asymmetry along the rolling direction. Reciprocating torsion can introduce twin boundaries and twin-texture, reducing the yield asymmetry. Pre-side-rolling generates dual texture components and increases the regions favorable for twinning during torsion. Combining side-rolling and reciprocating torsion results in a hybrid twin structure and remarkably low yield asymmetry.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Physical
Yonghui Zhang, Xin Yang, Sujuan Wang, Jiyu Liu, Xin Liu, Kangcheung Chan, Jiangwen Liu
Summary: The exploration of functional materials for water treatment is a global requirement for protecting life and the environment. However, the current materials used in oil/water separation and water harvesting face challenges such as complicated processing steps, poor microstructure controllability, and small-scale preparation. In this study, a novel WEDM strategy was introduced to fabricate a functional copper mesh with excellent superhydrophobicity, high durability, and efficient fog collection. The multifunctional superhydrophobic mesh shows promise in alleviating water pollution and shortage.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Materials Science, Multidisciplinary
Di Ouyang, Lei Zhao, Ning Li, Jie Pan, Lin Liu, K. C. Chan
Summary: This study systematically investigates the effect of structural heterogeneities on the mechanical behavior of metallic glasses and demonstrates that the arrangement of soft rejuvenated phases can alleviate strain localization and achieve a synergy between strength and ductility.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Hongju Zhang, Yuhang Du, Limin Lai, Ning Guo, Ning Li, Shengfeng Guo
Summary: This study systematically investigates the room-temperature mechanical properties and high-temperature oxidation resistance of AlxCrTaTi RMEAs. The results show that AlxCrTaTi RMEAs possess high yield strength and plasticity, and the Al0.25CrTaTi alloy exhibits good oxidation resistance at high temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Shijun Tan, Bo Song, Hongbing Chen, Xiaodong Tan, Risheng Qiu, Tingting Liu, Ning Guo, Shengfeng Guo
Summary: This study investigates the effects of free-end torsion on the microstructure and tensile property of low-carbon steel. Severe torsion deformation results in exceptionally high yield strength in low-carbon steels. This high hardening effect is mainly due to lattice distortion, high dislocation density, and grain shape change. Torsion deformation also introduces a gradient deformation structure, leading to increased strain hardening capacity and maintained plasticity/toughness. Increasing torsion angle enhances uniform elongation and peak strength. After twisting 2800 deg., the yield strength and peak strength can achieve 524 MPa and 675 MPa, respectively, with good tensile elongations (epsilon(f) = 9.6%, epsilon(u) = 7.4%) remaining.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Peng Zhu, Yao Yu, Cheng Zhang, Qingjun Zhou, Bailing An, Rong Guo, K. C. Chan, Lin Liu
Summary: A V0.5Nb0.5ZrTi refractory high-entropy alloy was successfully fabricated by selective laser melting (SLM) using elemental powders. A crack-free SLMed sample with a nearly single BCC structure was obtained with a VED of 333 J/mm3. Microcracks were generated in the SLMed samples when the VED was lower or higher than 333 J/mm3. Cracks were formed due to incomplete melting of Zr particles and thermal stress induced by the large temperature gradient during the SLM process. The SLMed crack-free sample exhibited superior mechanical properties compared to the as-cast counterpart.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Chemistry, Physical
Hongju Zhang, Deyu Ding, Meifang Tang, Bo Song, Yubin Niu, Hanwu Dong, Shengfeng Guo, Fusheng Pan
Summary: In this work, the microstructure, corrosion resistance, and discharge properties of the as-extruded Mg-7Li-1Y alloy were studied. The alloy exhibited a bimodal microstructure mainly composed of alpha-Mg and beta-Li phases. Despite poor corrosion resistance, it showed remarkable discharge performance with a discharge voltage of 1.35 V and a high anode utilization rate of 59% at a current density of 10 mA/cm2. The unique morphologies of discharge products and the presence of beta-Li phase contributed to the improved electrochemical activity and discharge performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Yongyang Zhu, Shaoyang Shen, Xu-Sheng Yang, Liming Zeng, Gary Tsui, Zheng-Long Xu, Qing Zhou, Renheng Tang, K. C. Chan
Summary: This study proposes a cost-effective method to regenerate LiBH4 by ball milling hydrous lithium metaborate with low-cost Mg-based alloys. The introduction of light rare-earth metals into Mg improves the regeneration kinetics of LiBH4 by facilitating the breakage of B-O and conversion of H+ into H-. A yield of 40% can be achieved for LiBO2 center dot 2H(2)O-CeMg12 system with a relatively short ball milling duration of 10 hours. The optimized regeneration of LiBH4 is believed to be efficient and economical, utilizing an intrinsic hydrogen source in LiBO2 center dot 2H(2)O and cheap reducing agents. This finding is expected to promote the widespread use of LiBH4 for hydrogen storage.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Ming Yuan, Chao He, Zhihua Dong, Bin Jiang, Bo Song, Ning Guo, Tingting Liu, Shengfeng Guo, Fusheng Pan
Summary: The effect of Sm addition on the microstructure and tensile properties of as-extruded Mg-xSm-0.4Zr (x = 1, 2, 3, 4 wt.%) alloys was investigated. The addition of Sm resulted in refined grain size, weakened texture, and enhanced strength and ductility of the as-extruded alloy. The Mg-3Sm-0.4Zr alloy displayed a good balance of strength and ductility, exhibiting various yield strengths, ultimate tensile strengths, and strains in different orientations.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Fengchun Chen, Meifang Tang, Junhu Zhou, Hongju Zhang, Chen Su, Shengfeng Guo
Summary: In this work, an (Fe0.8Ni0.2)71Mo5P12C10B2 amorphous alloy wire was successfully prepared, which showed excellent catalytic performance for oxygen evolution reaction (OER) in water splitting. After immersion in HNO3 solution, the wire surface was covered by metallic oxide. The electrochemical results revealed that the wire exhibited a low overpotential and a small Tafel slope, and maintained good stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
D. X. Han, G. Wang, Q. Wang, R. Feng, X. D. Ma, K. C. Chan, C. T. Liu
Summary: Shear-banding behavior in metallic glasses, which is associated with yield strength, is influenced by many factors at a micro-scale. In this study, a plastic-strength model was developed considering machine compliance, micro-pillar geometry imperfection, and substrate sink-in. The model was supported by the compressive properties of 18 metallic glasses and provides guidance for elastic limits and shear-banding dynamics at the micro-scale in characterizing deformation behavior of amorphous materials.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Metallurgy & Metallurgical Engineering
De-yu Ding, Yu-hang DU, Mei-fang Tang, Bo Song, Ning Guo, Hong-ju Zhang, Sheng-feng Guo
Summary: In this study, the microstructure, corrosion resistance, and discharge performance of Mg-6Zn-Mn-xNd (ZM61, x=0, 0.2, 0.6, 0.8, 1.0, wt.%) alloys in as-extruded and solution-aged states were characterized using various techniques. The addition of Nd was found to promote grain refinement in ZM61 alloys, and the ZM61-0.6Nd alloys in both states showed the best corrosion resistance and discharge performance. However, heat treatment had a detrimental effect on the overall performance of as-extruded alloys. Among all the tested alloys, the as-extruded ZM61-0.6Nd alloy exhibited the lowest corrosion current density, discharge potentials of -1.517 and -1.336 V vs SCE at current densities of 1 and 10 mA/cm2, respectively, and an anode efficiency of above 36% after 24 hours of discharge, indicating the best comprehensive performance. The good discharge performance can be attributed to the improved corrosion resistance and cracking effect of the discharge products.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Materials Science, Multidisciplinary
Meifang Tang, Limin Lai, Chen Su, Chunmei Li, Cheng Zhang, Shengfeng Guo
Summary: A ternary MoCoB metallic glass microwire catalyst with exceptional Fenton-like activity for degrading various dyes in a wide pH range has been reported. The catalyst shows excellent reusability and the bimetallic effect accelerates the electronic transfer kinetics, enabling the generation of multiple reactive oxygen species.
NPJ MATERIALS DEGRADATION
(2023)
Article
Engineering, Environmental
Lingya Yi, Siming Xiao, Yunpeng Wei, Dazhi Li, Rongfei Wang, Shengfeng Guo, Weihua Hu
Summary: We report a free-standing FeCoNiCrMo high-entropy alloy (HEA) plate that acts as an excellent oxygen evolution reaction (OER) catalyst, showing higher activity and durability compared to the benchmarking NiFe layered double hydroxide (LDH). The HEA catalyst requires overpotentials of 303 and 372 mV to reach current densities of 100 and 700 mA cm 2, respectively, and maintains its activity for at least 120 hours in alkaline media. The enhanced OER activity of the HEA catalyst is attributed to the absorption of Mo oxoanions and the persistence of trace Cr atoms in the surficial NiFeCo oxyhydroxide phase.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Yongyang Zhu, Xubo Li, Xu-Sheng Yang, Pengyun Chen, Gary Chi-Pong Tsui, Zheng-Long Xu, Renheng Tang, Fangming Xiao, Kangcheung Chan
Summary: Researchers have developed a low-cost BCC solid solution alloy with excellent activation performance and high effective hydrogen desorption capacity by using a new compositionally complex doping strategy. The synergistic effect of Nb, Fe, Co, Ni, and Mn elements has been confirmed to improve hydrogen storage performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
