Article
Materials Science, Multidisciplinary
Seung Jun Oh, Jinyeong Yu, Seho Cheon, Seong Ho Lee, So-Yeon Lee, Taekyung Lee
Summary: This study investigates the effect of electropulsing treatment (EPT) on microstructural evolutions in a-Mg alloy. The results show that EPT process induces faster static recrystallization and faster dissolution of precipitates compared to conventional furnace heat treatment (FHT) at lower processing temperatures. EPT along the extrusion direction exhibits more pronounced effects than EPT along the transverse direction.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Sang Won Lee, Gukin Han, Tea-Sung Jun, Sung Hyuk Park
Summary: This study demonstrates that the initial texture of Mg alloy significantly affects the microstructure developed during cold rolling and the recrystallization behavior during subsequent annealing. The distribution of internal strain energy determines the formation structure of recrystallized grains, with ND samples mainly forming a bimodal grain structure along shear bands, while TD samples form a uniform equiaxed recrystallized grain structure.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Qing Miao, Lantao Zhu, Wenke Wang, Zhihao Wang, Bin Shao, Wenzhen Chen, Yang Yu, Wencong Zhang
Summary: By multi-pass lowered-temperature rolling, AZ31 magnesium alloy sheets with optimized microstructure morphology were successfully fabricated, showing refined grain size and improved microstructure homogeneity. The stress state and temperature during the rolling process had influences on the texture evolution, leading to enhanced yield strength and fracture elongation of the resulting sheets.
Article
Nanoscience & Nanotechnology
Zhirou Zhang, Qinghuan Huo, Zhenyu Xiao, Yuxiu Zhang, Aki Hashimoto, Xuyue Yang
Summary: The study proposed a practical method for optimizing the mechanical properties of Mg-4Y-2Nd-0.2Zn-0.5Zr alloy by combining interrupted compression with intermediate annealing, resulting in the formation of deformation bands triggered by the intermediate annealing and a higher volume fraction of ultra-fine grains in the final IC sample compared to the CC sample.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
S. M. Fatemi, A. A. Kazemi Asl, H. Paul
Summary: The study investigated the effects of pretwins on the flow behavior, microstructure, and texture evolution of a rolled AZ31 magnesium alloy during hot deformation. It was found that pretwins influenced texture reorientation and dynamic recrystallization, leading to changes in flow behavior and microstructure along different directions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Hui Yu, Dongliang Wang, Ya Liu, Yu Liu, Lixin Huang, Binan Jiang, Sunghyuk Park, Wei Yu, Fuxing Yin
Summary: A single-pass gradient caliber rolling was performed on a conical-shaped AZ31 Mg alloy to obtain a transitional microstructure with strain ranging from 0 to 30%. The results showed that the recrystallization extent increased with strain. Different recrystallization mechanisms, including particle stimulated nucleation, extension twinning, and dynamic recrystallization, were observed at various strain levels. The texture of the deformed samples gradually transitioned from the initial basal texture to a non-fiber component and eventually formed a fiber orientation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Jingkai Feng, Dingfei Zhang, Hongjun Hu, Yang Zhao, Xia Chen, Bin Jiang, Fusheng Pan
Summary: During semi-solid extrusion, AZ31 magnesium alloy exhibits a higher nucleation rate for new fine grains and limited twinning activation, resulting in a homogeneous microstructure and improved mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
T. Nakata, C. Xu, L. Geng, S. Kamado
Summary: We report the formation of an unusual texture on the sheet-surface of a rolled Mg-3Al-0.4Mn alloy, where a typical basal texture is formed at the center of the sheet and an unusual texture with vertical tiling is observed at the sheet-surface. The surface promotes prismatic slips and dynamic recrystallization, leading to a high fraction of fine basal-textured grains and a small fraction of off-basal-textured grains. In contrast, the center preserves a relatively high fraction of deformed grains, promoting the growth of basal-textured grains and the formation of the typical basal texture.
SCRIPTA MATERIALIA
(2023)
Article
Metallurgy & Metallurgical Engineering
Victoria M. Miller, Jian-Feng Nie, Tresa M. Pollock
Summary: In this study, the effects of temperature and alloy content on the crystallographic texture and grain size distribution in Mg-Zn alloys were investigated after warm rolling and recrystallization. It was found that the recrystallization texture strength decreased with increasing heat treatment temperature. In addition, both the evolution of texture and the Avrami exponent were not sensitive to the Zn alloying content.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
Hossein Aghamohammadi, Seyed Jamal Hosseinipour, Sayed Mahmood Rabiee, Roohollah Jamaati
Summary: The study found that hot-rolled AZ31 alloy exhibited ultra-fine grains after 60% deformation, as well as activation of various dynamic recrystallization mechanisms. As the thickness decreased, the grain size decreased, the intensity of basal texture increased, and accordingly, the hardness increased.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Physical
T. Nakata, C. Xu, L. Geng, S. Kamado
Summary: This paper reports the application of cold-sample rolling (CSR) processing in a Mg-6Al-1Zn alloy sheet, which resulted in a high fraction of double twins and a substantial texture-weakening effect. Compared to high-temperature rolling (HTR) processing, CSR processing induced a relatively higher texture-weakening effect. The results indicate that twinning-mediated static recrystallization is essential for texture weakening in Al-concentrated Mg-alloy sheets.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Industrial
Dijia Zhao, Jian Qin, Shulin Lue, Jianyu Li, Wei Guo, Shusen Wu, Yaohua Zhang
Summary: Ultrafine-grained AZ31 alloy was successfully fabricated using a novel continuous squeeze casting-extrusion process. The extrusion ratio had a significant effect on the grain size and mechanical properties.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Physical
Lichao Li, Byeong-Chan Suh, Joung-Sik Suh, Chunjoong Kim, Yohan Go, Young Min Kim
Summary: In this study, the static recrystallization behavior and basal texture change of the cold-rolled AZXW1100 alloy during annealing were investigated. Highly deformed shear bands were observed in the cold-rolled alloy sheet, which caused rapid recrystallization at the beginning of annealing. The recrystallized grains nucleated in the shear bands guided the overall recrystallization behavior and led to the formation of a diamond-like or TD-split texture.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Liangliang Xue, Lifei Wang, Pengbin Lu, Hua Zhang, Guangsheng Huang, Bin Xing, Hongxia Wang
Summary: In-plane shear deformation is introduced into the pre-twinned AZ31 Mg alloy sheet to modify the basal texture and improve the formability. The twinning orientation is secondary regulated and rotated away from the transverse direction, resulting in a significant weakening of the basal texture. After annealing, the recrystallized grains inherit the grain orientation of rotating twins, leading to improved fracture elongation and Erichsen value.
Article
Metallurgy & Metallurgical Engineering
T. Nakata, C. Xu, L. Geng, S. Kamado
Summary: This study investigates the origin of the unique parallel alignment of (0001) poles to the transverse direction in rolled alloy sheets. It is found that intermediate reheating during rolling facilitates static recrystallization and leads to the formation of the parallel alignment of (0001) poles to the transverse direction. In contrast, continuous rolling without intermediate reheating suppresses the formation of the unique alignment. The presence of severely deformed regions near double twins hinders the nucleation and growth of statically recrystallized grains, resulting in in-plane anisotropy in ductility.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Review
Engineering, Biomedical
Babak Mehrjou, Yuzheng Wu, Pei Liu, Guomin Wang, Paul K. Chu
Summary: The emergence of antibiotic-resistant pathogens poses serious health issues. There is a global effort to find new methods to treat infections and develop better antibacterial materials and therapies. Non-biological methods and biomimetic patterns show potential for antimicrobial effects. This review summarizes recent advances in the application of chemical and biological approaches to combat bacterial infection and antibiotic resistance.
ADVANCED HEALTHCARE MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Guomin Wang, Kaiwei Tang, Wenjuan Jiang, Qing Liao, Yong Li, Pei Liu, Yuzheng Wu, Mengting Liu, Huaiyu Wang, Bin Li, Jianzhong Du, Paul K. Chu
Summary: Adjustable electro-mechanical forces can effectively kill bacteria and adding electrical charges can enhance the antibacterial efficacy.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Xingwang Yan, Xiaolin Zhang, Bin Wang, Ziran Chen, Junze Zhao, Gaopeng Liu, Dan Li, Qingdong Ruan, Liangliang Liu, Yue Xu, Mengxia Ji, Paul K. Chu, Huaming Li, Jiexiang Xia
Summary: Efficient heterojunction photocatalysts with spatial separation of photogenerated carriers are crucial to photo-catalysis. The unique carbonized polymer dots/ZnIn2S4 (CPDs/ZIS) Z-scheme heterojunction is designed to realize efficient spatial directional separation of photogenerated carriers and deliver enhanced photocatalytic performance in pollutant degradation. The CPDs generate more superoxide radicals to facilitate mineralization of organic pollutants and retain more holes for oxidation, while the Z-scheme migration mechanism of photogenerated carriers in the CPDs/ZIS composite preserves the original valence band potential of ZIS.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Yinghe Ma, Peng Wu, Jinhui Mei, Zhen Yu, Jianguo Yang, Yanming He, Huaxin Li, Chuanyang Lv, Sendong Ren, Jianping Xu, Zhihui Cai, Paul K. Chu
Summary: Micro-arc oxidation (MAO) was used to treat Ti-6Al-4V electron-beam-welded joints, and the effects on microstructure, phase composition, and corrosion resistance of the joint and surface coating were studied. The MAO treatment resulted in a phase transformation in the joint and a denser and thicker coating. The XRD analysis confirmed the presence of rutile and anatase phases in the coating. The corrosion tests showed a significant decrease in corrosion current density and an improvement in corrosion resistance due to the MAO treatment. Long-term exposure to a high-stress corrosion environment also revealed the formation of a protective layer on the joint.
Article
Chemistry, Physical
Ning Pang, Xin Tong, Yunzhe Zheng, Yang Zhou, Qingdong Ruan, Dajun Wu, Rong Huang, Dayuan Xiong, Shaohui Xu, Lianwei Wang, Paul K. Chu
Summary: The construction of heterostructures using atomic layer deposition and high-energy metal plasma implantation has a significant impact on the catalytic activity of cobalt oxide in the oxygen evolution reaction (OER). Among different metals, the heterostructure constructed with cobalt oxide and zirconium metal exhibits better OER activity than silver, titanium, and chromium metals. Increasing the number of zirconium atoms and the thickness of the cobalt oxide layer initially enhances the OER activity and then gradually decreases it. The Zr500/12CoO metal-semiconductor heterojunction has a higher barrier height and more electron-hole pairs, leading to a more positively charged metal surface and promoting the adsorption of OH-. The construction of metal-semiconductor heterojunctions provides insights into the design and surface-interface modification of efficient, low-cost, and durable electrodes for water splitting applications.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Shuai Feng, Donglian Li, Hao Dong, Song Xie, Yaping Miao, Xuming Zhang, Biao Gao, Paul K. Chu, Xiang Peng
Summary: In this study, MoO2/Mo2N heterostructures were prepared by regulating the coordination of Mo atoms. The electrocatalyst exhibits high current density and excellent stability for hydrogen evolution reaction.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Engineering, Biomedical
Yanbin Zhao, Peng He, Junyan Yao, Mei Li, Bin Wang, Linyuan Han, Zhihai Huang, Chao Guo, Jing Bai, Feng Xue, Yu Cong, Weihua Cai, Paul K. Chu, Chenglin Chu
Summary: In this study, a self-healing polymeric coating was constructed on a magnesium alloy for orthopedic implants. The coating incorporated a stimuli-responsive drug delivery nanoparticle platform and showed fast and stable water-enabled self-healing capacity. It also exhibited good antibacterial properties and promoted cell compatibility, osteogenesis, and angiogenesis.
Article
Chemistry, Physical
Shuyu Fan, Yinong Chen, Shu Xiao, Kejun Shi, Xinyu Meng, Songsheng Lin, Fenghua Su, Yifan Su, Paul K. Chu
Summary: Graphene coatings are promising solid lubrication materials due to their mechanical properties. This study presents a new method for in situ deposition of high-quality graphene coatings on hard substrates using NiCo solid solution and competitive reaction strategies. The graphene coating deposited on substrates with deep NiCo solid solution demonstrates superior low-friction and durability.
Article
Engineering, Environmental
Zanling Huang, Abebe Reda Woldu, Xiang Peng, Paul K. Chu, Qing-Xiao Tong, Liangsheng Hu
Summary: It has been found that adding Fe ions into alkaline electrolytes can enhance the oxygen evolution reaction (OER) activity of Ni-based catalysts. Experimental analysis reveals that Fe(III) can promote OER kinetics through two approaches, leading to improved performance and stability in electrochemical water splitting.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Optics
Ning Sheng, Haihao Fu, Tongyu Meng, Jianxin Wang, Wei Liu, Jingwei Lv, Zao Yi, Lin Yang, Paul K. Chu, Chao Liu
Summary: This paper studies the influence of SiO2 and four new optical materials on the OAM mode characteristics in orbital angular momentum (OAM) photonic crystal fibers (PCFs) for more efficient communication. The properties of OAM modes transmitted in the five materials, such as effective index difference, dispersion, confinement loss, etc., are derived using the finite element method. Universal rules for optimizing PCF in the future to improve the efficiency of optical fiber communication are obtained through in-depth analysis.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2023)
Article
Optics
Guangrong Sun, Qiang Liu, Haiwei Mu, Yudan Sun, Shimiao Wang, Mingzhu Han, Jianxin Wang, Jingwei Lv, Paul K. Chu, Chao Liu
Summary: A novel terahertz anti-resonant fiber is designed with high-resistivity silicon in the fiber and nested double-layer U-shape tubes, which effectively reduce the transmission loss. The fiber's confinement loss and effective material loss are analyzed and optimized using the finite element method. The optimized fiber demonstrates a low total loss of 3.1 x 10-3 dB/m at 1 THz and a low-loss transmission bandwidth of 0.44 THz in the range of 0.5-1.5 THz. Bending analysis shows that the bending loss is less than 2.1 x 10-2 dB/m at 1 THz for bending radii bigger than 60 cm. This anti-resonant fiber exhibits excellent performance and holds high commercial potential in terahertz waveguides.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Applied
Zanling Huang, Shuqi Zhu, Yuan Duan, Chaoran Pi, Xuming Zhang, Abebe Reda Woldu, Jing-Xin Jian, Paul K. Chu, Qing-Xiao Tong, Liangsheng Hu, Xiangdong Yao
Summary: In this study, it was found that Ni sites act as a host to attract Fe(III) to form Fe(Ni)(III) binary centers, which promote the oxygen evolution reaction (OER) activity and stability by cyclical formation of intermediates. Additionally, other ions can also catalyze the OER process on different electrodes.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Physics, Applied
Wei Li, Debao Wang, Tongyu Meng, Wei Zhou, Jingwei Lv, Lin Yang, Wei Liu, Yan Lv, Yu Wang, Paul K. Chu, Chao Liu
Summary: A hybrid metal-dielectric nanoparticle composed of a gold dimer and silicon-silica is designed and analyzed using the finite element method (FEM) to explore the strong coupling between the combined plasmonic mode and anapole mode. Theoretical simulation shows that the nanoparticle achieves an enhanced electric field enhancement of 640 and exhibits unidirectional scattering with almost zero backscattering at multiple wavelengths in the far-field region. Additionally, the composite nanoparticle exhibits a high Purcell factor of 12,193 and sensitivity of 610nm/RIU, surpassing that of single-metal or dielectric nanoparticles.
MODERN PHYSICS LETTERS B
(2023)
Review
Chemistry, Multidisciplinary
Yunlei Zhou, Liting Yin, Shuangfei Xiang, Sheng Yu, Hannah M. Johnson, Shaolei Wang, Junyi Yin, Jie Zhao, Yang Luo, Paul K. Chu
Summary: This review provides a comprehensive overview of the synthesis and fabrication strategies employed in the development of MXene-based flexible materials for energy storage applications. The paper analyzes the current state of the field and explores the challenges and research opportunities in this dynamic area.
Article
Electrochemistry
Hanxue Zhao, Mai Li, Jintao Du, Yuhang Lei, Ayesha Irfan, Muhammad Imran, Chunrui Wang, Jun He, Zhongyi Sun, Paul K. Chu
Summary: Porous carbon derived from metal-organic frameworks (MOFs) is synthesized to form a three-dimensional structure of conductive porous carbon nanoflakes (CPCN) with unique structural characteristics and conductivity. Incorporation of nanoscale CdSe particles as energy-storage materials into CPCN results in a flexible electrode for sodium-ion supercapacitors. The CdSe/CPCN@CC electrode exhibits high specific capacitance and excellent cycling stability, making it suitable for flexible and wearable applications.
ELECTROCHIMICA ACTA
(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)
