Article
Materials Science, Multidisciplinary
Xiangsheng Xia, Dayu Shu, Echuan Yang, Chuankai Hu
Summary: The microstructures and mechanical properties of Mg-8.5Gd-4.5Y-0.3Zr alloys with and without Zn addition were investigated in this study, and the strengthening mechanisms of these two alloys were also discussed. The results show that the as-extruded alloy with Zn addition has finer grains due to the inhibited dislocation motion. Dynamic precipitation occurs during the extrusion process and unevenly distributes in both alloys, promoting grain refinement. The alloy with Zn addition exhibits significantly higher yield strength and elongation compared to the alloy without Zn addition, mainly attributed to the strengthening effects of the LPSO and g0 phases.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Yangchao Deng, Wei Sun, Yang Yang, Hongyi Zhan, Kun Yan, Guang Zeng
Summary: The impacts of Mg2Sn precipitation on the age-hardening and deformation behavior of a Mg-4Sn-3Al-1Zn alloy have been studied. The alloy shows moderate hardening during ageing treatment at 175℃, with a significant increase in yield tensile strength but reduced elongation. Nanosized Mg2Sn precipitates are uniformly distributed within grains, improving tensile strength properties. Coarsened Mg2Sn precipitates and precipitate-free zones (PFZs) can be observed along grain boundaries. Tensile deformation primarily occurs in slip band array regions in grain interiors for the solution-treated alloy, and in PFZs for the as-aged alloy. The decrease in tensile ductility is caused by early intergranular microcracks initiated by coarse grain boundary Mg2Sn precipitates and PFZs. The results provide insights for developing affordable Mg alloys with a balanced combination of strength and ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Che-Fu Lee, Tao-Tsung Shun
Summary: This study investigated age-hardening and microstructure evolution of Al0.5CoCrFe1.5NiTi0.5 high-entropy alloy heat-treated from 500 degrees C to 1200 degrees C. Optimal age hardening was observed at 700 degrees C, attributed to the precipitation of the sigma phase, resulting in increased hardness to HV556.
Article
Nanoscience & Nanotechnology
Luv Gurnani, Amartya Mukhopadhyay
Summary: The development of hardened/toughened oxide-oxide ceramic alloys through a solid-state precipitation-based approach is important due to the processing challenges and microstructural inhomogeneity associated with ceramic composites. This research focuses on understanding the effects of varying dimension/stoichiometry of coherent second-phase precipitates on the mechanical properties of such alloys. The study demonstrates that consistent precipitate particles can be maintained even after aging, resulting in improved hardness and resistance to crack propagation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Zhao Yang, Taiki Nakata, Chao Xu, Gang Wang, Lin Geng, Shigeharu Kamado
Summary: A high-performance Mg-8Gd-4Y-0.5Mn-0.2Sc alloy was fabricated using homogenization, hot extrusion, and ageing. The microstructure evolution during homogenization was studied, and an optimum time of 18 h was determined to minimize the volume fraction of second phase particles and maintain a fine grain structure. The alloy exhibited excellent age-hardening ability and strength after peak-aged treatment, with a tensile yield stress of 441 MPa and an ultimate tensile strength of 506 MPa. The high yield strength was attributed to the co-existing bimodal microstructure, fine dynamically recrystallized grains, dense precipitated particles, and nano-scale precipitates. Precipitation strengthening was revealed as the dominant strengthening mechanism.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Min Cui, Sung Hwan Lim, Hyoung-Wook Kim, Je-Hyun Lee
Summary: This study investigated the effect of Cu additions on the age-hardening behavior of AA6016 Al-Mg-Si alloys with and without prestraining. The results showed that higher Cu addition increased peak hardness but shortened the time to reach peak aging. Prestraining improved the peak hardness in alloys with higher Cu addition. Higher Cu addition slowed the hardness reduction in the overaged state and consistently exhibited finer precipitates in alloys without prestraining, but accelerated the hardness decrease and led to a coarser microstructure in alloys with prestraining.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Yunpeng Zhu, Jiayu Qin, Jinhui Wang, Peipeng Jin, Peijie Li
Summary: The strain hardening behavior of AZ91 alloys fabricated by spark plasma sintering (SPS) under different sintering temperatures was investigated through compression tests at room temperature. The sintered AZ91 alloys with random texture showed high yield strength and significant strain hardening ability. The hardening abilities, including strain hardening rate, strain hardening exponent, and hardening capacity, increased with increasing sintering temperature. The strain hardening in the sintered AZ91 alloys was mainly controlled by dislocation slip and accompanied by extension twinning. The increase in hardening abilities was primarily attributed to the enhanced dislocation-induced strain hardening due to the accelerated rate of dislocation propagation caused by coarse grains. Additionally, the strain hardening induced by twinning was suppressed by fine grains and intragranular lamellar Mg17Al12 precipitates.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
A. E. Davis, J. R. Kennedy, D. Lunt, J. Guo, D. Strong, J. D. Robson
Summary: Preageing technique can significantly increase the hardness of magnesium alloys, reduce total ageing times, and provide a certain degree of customization of mechanical properties through control of precipitate habit plane and morphology. However, the effectiveness of this technique depends on the alloy system, with the focus on the fundamental processes of precipitate nucleation and phase evolution.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Zhenyuan Wang, Haixuan Cao, He Zheng, Peili Zhao, Zhen Tang, Ruilong Huang, Shuangfeng Jia, Ying Zhang, Dongshan Zhao, Jianbo Wang
Summary: This study explores the effect of aging hardening on the mechanical properties and precipitation transformation of the as-cast Mg-0.9Co-4.5Y alloy. The results show that the ultimate compressive strength (UCS) and compressive yield strength (CYS) of the alloy at peak hardness are 604.8 MPa and 401.5 MPa respectively, while the compression rate (ε) after solution-treated is 21.9%. An in-depth investigation reveals that the improvement of malleability is associated with the reduction of the volume fraction of LPSO phase after solution treatment, and the substantial increase of CYS after peak-aging is related to the dispersion strengthen of MgYCo4 phase and precipitation of β' and β" phases.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
J. Christudasjustus, M. R. Felde, C. S. Witharamage, J. Esquivel, A. . A. . Darwish, C. Winkler, R. K. Gupta
Summary: The effect of age-hardening on microstructure, hardness, and corrosion of an Al-5at.%V alloy, produced using high-energy ball milling and subsequent cold compaction, has been investigated. Proper age-hardening treatment can improve the hardness and maintain good corrosion resistance of the alloy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Z. H. Li, T. T. Sasaki, A. Uedono, K. Hono
Summary: This study investigates the role of Zn in the rapid age-hardening process of magnesium alloys. The results show that the addition of Zn facilitates the formation of Ca-Zn co-clusters, which contributes to the rapid age-hardening.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Satoshi Semboshi, Ryuta Hariki, Toshiya Shuto, Hiroshi Hyodo, Yasuyuki Kaneno, Naoya Masahashi
Summary: The study focused on the microstructural response and variations in strength and electrical conductivity of a Cu-20 at. pct Ni-6.7 at. pct Al alloy during isothermal aging at temperatures from 723 K to 1023 K (450 degrees C to 750 degrees C). It was found that the age-induced strengthening mainly resulted from fine dispersion of gamma'-Ni3Al coherent particles in the grains, exhibiting a maximum at an aging temperature of 873 K (600 degrees C). The fine precipitation strengthening by gamma'-Ni3Al coherent particles resulted in excellent mechanical properties, comparable to other commercial age-hardened Cu alloys.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Xiang Jiang, Chun Xi, Xiaohu Liu, Limin Wang, Yuehua Kang, Qinghuan Huo
Summary: The study reveals that in magnesium alloys, higher Gd content can enhance the thermal stability of fine grains initially through continuous SRX mechanism, and later through consuming dislocations to promote grain nucleation, resulting in difficulty in grain boundary migration in high Gd-alloyed magnesium. However, peak-aging in high Gd-alloyed magnesium leads to accelerated grain growth rate, exceeding that of low Gd-alloyed magnesium.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Thermodynamics
Sanjib Gogoi, Sanjib Banerjee, Sumit Bhowmick
Summary: The precipitation kinetics of microalloyed 2219Al alloys were investigated. The results show that the addition of Cd reduces the activation energy, promotes the precipitation reaction, and leads to the formation of the theta phase within the solid solution, enhancing the mechanical properties of the alloy.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Materials Science, Multidisciplinary
W. F. Liu, X. W. Gao, L. Wang, J. H. Yao, Q. B. Fan, J. J. Yuan, S. Li
Summary: A clad plate of high strength Ti386 and high plasticity TC4 was manufactured by hot rolling and solution-aging treatment. The interfacial bonding strength and tensile properties of the clad plate were improved by increasing the rolling reduction and carrying out solution-aging treatment.
Article
Materials Science, Multidisciplinary
C. He, Y. Zhang, C. Q. Liu, Y. Yue, H. W. Chen, J. F. Nie
Article
Materials Science, Multidisciplinary
Zhuoran Zeng, Mengran Zhou, Peter Lynch, Frederic Mompiou, Qinfen Gu, Mohsen Esmaily, Yuanming Yan, Yao Qiu, Shiwei Xu, Hidetoshi Fujii, Chris Davies, Jian-Feng Nie, Nick Birbilis
Summary: The ductility of extruded polycrystalline pure magnesium with fine grain size is primarily supported by the sliding between grouped grains, grain rotation, and dislocation slip, which postpones the occurrence of localized stress concentration and significantly increases the ductility of pure Mg at room temperature.
Article
Nanoscience & Nanotechnology
Cong He, Zhigiao Li, Dehao Kong, Xiaojun Zhao, Houwen Chen, Jian-Feng Nie
Summary: With the increase in Gd concentration, the dominant twinning mode in Mg-Gd alloys changes, and this twinning mode may be activated in other Mg alloys with a high concentration of solute atoms larger than Mg.
SCRIPTA MATERIALIA
(2021)
Article
Engineering, Environmental
Hongtao Yang, Xinhua Qu, Minqi Wang, Houwen Cheng, Bo Jia, Jianfeng Nie, Kerong Dai, Yufeng Zheng
Summary: The study demonstrates the potential of high-strength biodegradable Zn-Li alloy implants for high load-bearing applications in orthopedic surgeries. The implants facilitated complete fracture healing within 6 months, with the osteogenic activity of the Zn-Li alloy validated.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Multidisciplinary Sciences
Cong He, Zhiqiao Li, Houwen Chen, Nick Wilson, Jian-Feng Nie
Summary: The authors report an unusual solute segregation phenomenon in a group of Mg alloys driven by chemical bonding, where solute atoms larger than Mg segregate to compression sites of specific fully coherent twin boundary.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Sumit Kumar Maurya, Jian Feng Nie, Alankar Alankar
Summary: Atomistic simulations were used to investigate the microstructural transformation of Al-Ti multilayers, showing that the crystallographic orientation relationships, layer thickness, and heating rate play important roles in influencing the microstructural changes. The study found that the transformation in multilayers is influenced by the interface characteristics, layer thickness, and heating rate, with the crystallographic orientation relationships having a significant impact on the microstructural evolution.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Engineering, Biomedical
Guan-Nan Li, Su-Ming Zhu, Jian-Feng Nie, Yufeng Zheng, Zhili Sun
Summary: The study demonstrated the low susceptibility of the Zn-0.8 wt%Li alloy to stress corrosion cracking and stability of both pure Zn and the alloy during constant-load immersion test. This suggests the feasibility of both materials as biodegradable metals in medical device applications.
BIOACTIVE MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Zhifeng Huang, Jian-Feng Nie
Summary: This study investigates the interaction of hydrogen with different alloying elements in magnesium alloys at a specific twin boundary, revealing that hydrogen prefers to bond with certain solute elements. These interactions can either enhance or weaken the cohesion of the twin boundary, showcasing the importance of understanding how hydrogen embrittlement occurs in magnesium alloys.
Article
Materials Science, Multidisciplinary
Chaoqiang Liu, Houwen Chen, Min Song, Jian-Feng Nie
Summary: Aberration-corrected scanning transmission electron microscopy was used to study a novel metastable phase, beta '' phase, induced by electron beam irradiation in a Mg-9.8 wt.%Sn alloy. The phase has a spherical D0(19) structure and formation involves solely the ordering of Sn atoms in the solid solution magnesium matrix, with an energetically favored process according to first-principles calculations.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
L. Qi, X. D. Huang, A. P. Zhang, H. W. Chen, J. F. Nie
Summary: This study characterized two types of previously unreported dislocation walls in a high-entropy alloy, showing the importance of these structures in strain hardening and plastic accommodation. The walls are constituted by specific types of partial dislocations and play a significant role in dislocation-interface interactions.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Chun Chen, Hua Huang, Jialin Niu, Jian-Feng Nie, Guangyin Yuan
Summary: The study identified a strong tension-compression yield asymmetry in as-extruded pure zinc, with higher twinning activity under tension being the underlying reason. It suggests weakening texture and refining grains as effective strategies to reduce the tension-compression yield asymmetry.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Hong Liu, Fengxiang Lin, Pei Liu, Yuan Yue, Kwang Seon Shin, Liming Peng, Laurent Delannay, Jian-Feng Nie, Nele Moelans
Summary: This study focuses on twining in magnesium, particularly the variant selection of primary-secondary twin pairs and the underlying causes. Through crystallographic analysis and calculation methods, the stress field distribution characteristics in primary-secondary twin pairs are revealed, as well as the impact of different stress components on twin transmission.
Article
Nanoscience & Nanotechnology
Yunhe Zheng, Laure Bourgeois, Jian-Feng Nie
Summary: This study investigated the structure of precipitates in Mg-Zn-Al alloys, revealing new structural features and proposing that the rod-shaped precipitates can be described by tiling of different shapes.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
S. L. Yang, N. Wilson, J. F. Nie
Summary: Re-examination through DFT calculation shows that the widely-accepted orthorhombic structure of sz precipitate in Al-Cu-Mg-Ag alloys is actually tetragonal, which can facilitate the formation of the equilibrium theta phase.
SCRIPTA MATERIALIA
(2021)
Article
Metallurgy & Metallurgical Engineering
Suming Zhu, Trevor B. Abbott, Jian-Feng Nie, Hua Qian Ang, Dong Qiu, Kazuhiro Nogita, Mark A. Easton
Summary: The re-evaluation of magnesium die-casting alloy AE44 with minor Mn addition shows that T5-aged AE44 exhibits a better strength-ductility combination and improved creep resistance. The findings suggest that precipitation hardening of the alpha-Mg matrix plays a more important role than grain boundary reinforcement by intermetallic phases in enhancing the creep resistance of die-cast Mg alloys. These results could open up new application perspectives for AE44, particularly in the automotive industry.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
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)
