Article
Materials Science, Multidisciplinary
Jyoti S. Jha, Suraj P. Toppo, Rajkumar Singh, Asim Tewari, Sushil K. Mishra
Summary: The dual-phase titanium alloy Ti-6Al-4V can be thermomechanically treated to produce various microstructures affecting its mechanical properties. The equiaxed microstructure exhibits the highest elongation, while the alpha'-lath morphology shows the lowest elongation. The deformation mechanisms of slip, twin, and fracture depend on the microstructure morphology in Ti-6Al-4V.
MATERIALS CHARACTERIZATION
(2021)
Article
Engineering, Manufacturing
James Wainwright, Stewart Williams, Jialuo Ding
Summary: This study demonstrates the refinement of Ti-6Al-4V alloy's prior-β grains through process control alone, without the need for post-processing or alloy modification. By increasing the deposition rate and reducing the specific energy density, the grain structure can be transformed from columnar to equiaxed morphology.
ADDITIVE MANUFACTURING
(2023)
Article
Engineering, Manufacturing
Xiang Wang, Lin-Jie Zhang, Jie Ning, Sen Li, Liang-Liang Zhang, Jian Long, Wei Ma
Summary: This study investigated the effects of Fe content on the grain morphology, microstructure, and mechanical properties of Ti-6Al-4V produced by laser wire deposition. The addition of Fe transformed columnar beta grains in the deposit into equiaxed grains, leading to the formation of a uniform ultrafine microstructure and significantly improved mechanical properties. Iron played multiple roles including solid solution strengthening, fine grain strengthening, and dispersion strengthening in the deposit, resulting in increased hardness and compressive strength.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Xinyu Yang, Richard A. Barrett, Noel M. Harrison, Sean B. Leen
Summary: A physically-based, mixed-phase structure-property model is developed for analyzing the microstructure-sensitivity of tensile stress-strain response in additively manufactured Ti-6Al-4V, considering the effects of solutes, grain size, phase volume fraction, and dislocation density. The model incorporates solid-state phase transformation and dislocation density evolution to simulate the effects of martensite dissolution and a -b transformation at high temperature, allowing for rapid process-structure-property prediction and optimization.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Hamid Arabi, Mostafa Ketabchi, S. H. N. Alhosseini
Summary: The aim of this study was to investigate the mechanical and microstructural variations of Ti-6Al-4V alloy through different ECAP cycles. The results revealed changes in grain size and phase content after ECAP pressing, and a significant increase in mechanical strength initially followed by a decrease in the increment.
Article
Engineering, Aerospace
Lin Qi, Yazhou Guo, Kanghua Jin, Huaipu Kang, Yulong LI
Summary: This paper characterizes the biaxial tensile behavior of isotropic Ti-6Al-4 V using a novel cruciform specimen. The Digital Image Correlation technique is applied to determine strain distribution, and an Inverse Analysis approach is used to determine the true stresses during biaxial tensile tests. The results show that the Cazacu criterion accurately describes the initial yield locus, while the Mises criterion predicts the strengthening behavior of Ti-6Al-4 V in the first quadrant of the principal stress space more accurately.
CHINESE JOURNAL OF AERONAUTICS
(2023)
Article
Materials Science, Multidisciplinary
Mengmeng Zhang, Jianke Qiu, Chao Fang, Mingjie Zhang, Yingjie Ma, Zhiqing Yang, Jiafeng Lei, Rui Yang
Summary: This article investigates the variation of dislocation structures in Ti-6Al-4V ELI alloy subjected to different stress levels. The results show that stress influences the density of dislocations and the activation of slip systems, which in turn contribute to creep and the formation of low angle grain boundaries.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
V. N. Vilane, R. D. Knutsen, J. E. Westraadt
Summary: Temporary hydrogen alloying treatment can modify the coarse-grained microstructure of a titanium alloy, resulting in improved strength and ductility. The ductility of the alloy is affected by the dehydrogenation temperature, with excessive temperature leading to embrittlement. Controlling the dehydrogenation treatment can optimize the performance of the alloy.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
K. Somlo, K. Poulios, C. Funch, C. F. Niordson
Summary: The study investigates the anisotropic behavior of LPBF Ti-6Al-4V under uniaxial tension through crystal plasticity simulations, which result in a set of crystal plasticity parameters capable of reproducing the experimental behavior. The research demonstrates that the synthetic multi-scale representative volume element and minimized crystal plasticity constitutive parameters can accurately capture the material's Young's modulus, yield strength, and hardening behavior.
MECHANICS OF MATERIALS
(2021)
Article
Chemistry, Physical
Yong Xie, Mengcheng Gong, Ruize Zhang, Ming Gao, Xiaoyan Zeng, Fude Wang
Summary: This study investigated the effects of near beta transus solution and aging treatment on the microstructure and tensile properties of wire arc additive manufactured Ti-6Al-4V. The results showed an increase in yield strength up to 904 MPa and a high elongation above 15.4% by inducing a fine lamellar structure and discontinuous alpha grain boundaries. The study establishes a Hall-Petch relationship between yield strength and alpha lamellae width, showing an improvement in tensile properties without complicated plastic deformation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Seong Ho Lee, Jinyeong Yu, Seho Cheon, Jung Gi Kim, Taekyung Lee
Summary: This research compares the microstructure and microhardness of Ti-6Al-4V alloy fabricated by selective laser melting using electropulsing treatment and conventional furnace heat treatment. The results show that electropulsing treatment can eliminate columnar microstructures, refine beta-grains, and effectively improve the microstructural inhomogeneity.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Engineering, Manufacturing
Zhichao Wang, Xintian Wang, Xu Chen, Chunlei Qiu
Summary: Adding 3 wt% Nb particles improves the processability of Al7075 alloy and promotes grain refinement. After L-PBF processing, the Al7075-Nb sample exhibits ultrafine equiaxed grains and avoids hot tearing. During deformation, Al3Nb particles are looped around by dislocations, while MgZn2 particles are cut through by dislocations.
ADDITIVE MANUFACTURING
(2022)
Article
Nanoscience & Nanotechnology
Conghui Zhang, Kun Hu, Min Zheng, Wenguang Zhu, Guodong Song
Summary: High-energy shot peening was used to create a nanocrystalline surface layer in Ti-6Al-4V alloy with bimodal and lamellar structure. The results showed that the bimodal structure had higher compressive residual stress and fatigue limit compared to the lamellar structure, leading to improved fatigue strength. The synergy effect of surface gradient nanostructure and compressive residual stress played a key role in enhancing the fatigue limit of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Prekshya Nath, Lakhindra Marandi, Indrani Sen
Summary: Ti-6Al-4V alloy can be improved in performance by thermomechanical processing to tailor its microstructure. This study investigates two different processing routes and finds that a novel approach can generate an equiaxed structure with higher hardness and mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Materials Science, Multidisciplinary
Hung Dang Nguyen, A. Pramanik, A. K. Basak, Y. Dong, C. Prakash, S. Debnath, S. Shankar, I. S. Jawahir, Saurav Dixit, Dharam Buddhi
Summary: This investigation compares electron beam melting (EBM), selective laser melting (SLM), and directed energy deposition (DED) as additive manufacturing (AM) techniques for producing titanium alloy parts. The study examines the differences in microstructure, tensile properties, porosity, surface roughness, and residual stress among these methods. It concludes that the choice of AM process affects the material's characteristics, and additional treatments such as annealing and stress relief can improve the performance of AM-fabricated parts.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
L. Q. Fu, Z. W. Yang, Y. Wang, Z. Q. Ma, Z. J. Wang, D. P. Wang
Summary: This study identified the oxidation difference induced by microstructural bands in additive manufactured titanium alloy. The stronger oxidation resistance of heat-affected bands is attributed to the more compact beta laths.
MATERIALS RESEARCH LETTERS
(2022)
Article
Engineering, Industrial
Meng Zhang, Ying Wang, Zhenwen Yang, Zongqing Ma, Zhijiang Wang, Dongpo Wang
Summary: Ni3Al-based alloy was successfully prepared by adjusting the feeding speed of Ni and Al wires in T-WAAM, leading to changes in microstructure and mechanical properties with increasing build height. The alloy at the bottom showed optimal mechanical properties, with tensile strength of 817.3 MPa and elongation of 20.9%. The study also found that the mechanical properties of the deposited alloy were equivalent to commercially available Ni3Al-based alloys IC218 and IC221M.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Engineering, Manufacturing
Zitong Zeng, Zhijiang Wang, Shengsun Hu, Shaojie Wu
Summary: This study explores the dynamic behavior of the molten pool and identifies electric characteristic signals that reflect the weld penetration states and degree in 2G position for fixed-point wire-filled pulsed gas tungsten arc welding. The molten pool behavior, such as collapse and rise in molten pool height and changes in oscillation amplitude, can be extracted from arc voltage signals. Changes in average peak voltage and base voltage can reflect the occurrence and degree of weld penetration. Wire filling and base current have significant effects on the molten pool behavior and characteristic signals.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Engineering, Manufacturing
Wang Liu, Zhijiang Wang, Zhendong Chen, Huawei Liu, Shaojie Wu, Dongpo Wang, Shengsun Hu
Summary: A signal sensing method based on the change in arc voltage during the peak current period was proposed to characterize the backside weld pool geometry in root-pass welding. The method introduces the influence of heat input and combines it with arc voltage change to comprehensively describe the geometric shape of the backside weld pool.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Chemistry, Physical
Tianxu Li, Zhijiang Wang, Zhenwen Yang, Xinxin Shu, Jun Xu, Ying Wang, Shengsun Hu
Summary: Additive manufacturing technology can fabricate functionally graded materials with a layered gradient change in chemical composition and microstructure. The research showed that the composition gradient was smoothly distributed and the microstructure and mechanical properties exhibited a smooth change as well.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Xinyu Liang, Zhijiang Wang, Lei Cui, Zhixiong Lin, Zhendong Chen, Feng Zhang, Zhen Shao, Lijun Yang, Yongliang Chen, Yiming Huang, Dongpo Wang
Summary: This study conducted friction pull plug welding (FPPW) on a thick AA2219-T87 plate and characterized the shaping, microstructure, and mechanical properties of the FPPW joint. The experimental results showed that defects were the most influencing factor on the tensile properties of the joint, with insufficient dynamic recrystallization and plug necking causing lack of bonding at the top and bottom of the joint. Kissing bonds were identified as the main sources of cracks, which were significantly affected by dynamic recrystallization.
MATERIALS CHARACTERIZATION
(2022)
Article
Engineering, Manufacturing
Tianxu Li, Zhijiang Wang, Shengsun Hu, Zhenwen Yang, Ying Wang
Summary: This study utilized dual-wire arc additive manufacturing to fabricate a functionally graded material with a smooth composition transition. By analyzing the fracture morphology and crack location, it was determined that the weakest position of the material was near the composition of 20 wt% IN625. By optimizing the process parameters and the composition gradient path, the mechanical properties of the material were greatly improved.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Engineering, Multidisciplinary
Shaojie Wu, Jing Feng, Fangjie Cheng, Zhijiang Wang, Dongpo Wang
Summary: This paper proposes a new double-sided root welding process for SCRs, which can achieve a nearly smooth root geometry. Test results show that the average values of root reinforcement, root transition angle, and transition radius achieved with this process are dramatically lower than those achievable with the best technologies available. The fatigue strength of the double-sided welding joints is improved by at least 45.8% due to reduced root stress concentration. However, incomplete penetration defects may occur when the molten pool position is not appropriate. Solutions for this problem are discussed. The proposed process is believed to be a potential strategy for welding high fatigue life SCRs.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2023)
Article
Materials Science, Multidisciplinary
Tianxu Li, Zhijiang Wang, Zhenwen Yang, Ying Wang
Summary: Local Nb alloying was conducted to address the issue of weakening solution strengthening in a functionally graded material. The addition of Nb solved this problem by preventing the formation of large Laves phases, resulting in improved tensile strength and elongation. However, the presence of chain-like Laves phases still had a negative impact on the material's tensile properties.
Article
Materials Science, Multidisciplinary
Tianxu Li, Zhijiang Wang, Zhenwen Yang, Ying Wang, Shengsun Hu
Summary: In the preparation process of functionally graded materials by dual-wire arc additive manufacturing, the difference in wire feed speed between the two wires can negatively affect shaping accuracy and microstructure uniformity. To address this issue, the wire feeding strategy was improved by using an up-and-down layout for droplet transfer, resulting in enhanced shaping accuracy and improved uniformity of microstructure and hardness.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Engineering, Manufacturing
Zhendong Chen, Zhijiang Wang, Fengrui Wang, Xinyu Liang, Wang Liu, Shaojie Wu, Dongpo Wang
Summary: Good root-pass welding is crucial for high-performance welded joints. Welding in the vertical position presents challenges of uneven shaping and discontinuous penetration. This study explores characteristic signals to predict the backside weld width (Wb) for cold metal transfer (CMT) root-pass welding. By analyzing topside weld pool images and electrical signals, the welding heat input (HI) and peak current time ratio (PTR) were identified as representative signals for heat and force in the CMT welding process. Combining these signals, a precise Wb prediction model was established, laying the foundation for weld penetration control.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Metallurgy & Metallurgical Engineering
Zhijiang Wang, Zitong Zeng, Shaojie Wu, Xinxin Shu, Chengfeng Wu, Dongpo Wang, Shengsun Hu
Summary: Wire-filled pulsed gas tungsten arc welding (GTAW-P) is commonly used for horizontal position welding of pipes, requiring uniform full penetration for high weld quality. A penetration control strategy of step welding is designed using characteristic signals, and the dynamic modeling of backside molten pool width is conducted with back propagation (BP) neural network. The influence of step distance on characteristic signals is explored, with well-shaped welds achieved at a step distance of 3 mm. The control system, utilizing the step welding strategy and real-time feedback from BP neural network prediction, effectively controls the backside weld width in the horizontal position, even under variable gap or heat dissipation conditions.
WELDING IN THE WORLD
(2023)
Article
Metallurgy & Metallurgical Engineering
S. Zou, Z. Wang, Y. Cao, S. Hu
Summary: In this study, a sensing method for gas tungsten arc welding was proposed to monitor the stability of metal transfer and weld surface height. A fuzzy controller and a proportional integral derivative controller were designed to control the stability. Preliminary control experiments proved the effectiveness and potential of the proposed sensing and control strategies.
Article
Materials Science, Multidisciplinary
Meng Zhang, Zhenwen Yang, Zongqing Ma, Zhijiang Wang, Ying Wang
Summary: In this study, Ni3Al alloys with Al equivalents ranging from 17 to 25 at.% were successfully fabricated by adjusting the relative feeding speed. It was found that the microstructure and mechanical properties of the alloys were significantly influenced by the Al content. With increasing Al content, the alloy's microstructure changed and the tensile strength and elongation gradually increased. Fracture analysis of the final alloy materials revealed the mechanism behind the high tensile strength and ductility.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Automation & Control Systems
Yue Cao, Zhijiang Wang, Shengsun Hu, Tao Wang
Summary: The control of backside weld width in GMAW-P is achieved by utilizing two electrical characteristic signals as feedback. The GMAW-P process is adjusted by changing the parameters of the base current period, while the backside weld width is measured during the peak current period. The two characteristic signals, namely the relative change in arc voltage and the average arc voltage during the peak current period, are used as sensing signals and exhibit negative linear relationships with backside weld width. The control system and adaptive predictive controller are designed and validated for real-time control.
IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY
(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)
