Article
Materials Science, Multidisciplinary
Sudip Kumar Sarkar, Aniruddha Biswas
Summary: This study quantifies the nano-scale micro-hardness and microstructural evolution of a high-Cr binary ferritic Fe-20 at.% Cr alloy during thermal aging using a combination of atom probe tomography, transmission electron microscopy, and small angle neutron scattering. It successfully estimates the mechanical response of the alloy through reliable quantification and suitable hardening models.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Sigurd Wenner, Constantinos Hatzoglou, Eva Anne Mortsell, Petter Asholt
Summary: High-Si aluminum foundry alloys gain strength through the formation of nanoprecipitates upon heat treatment. Room-temperature storage affects the kinetics of early aging, with Cu additions accelerating the formation of hardening precipitates. However, 1 month of room-temperature storage negates the positive effect of Cu. The solubility limits of Si and Mg during solution heat treatment temperature mainly limit the maximum achievable strength. This study contributes to understanding the solute balance, early aging kinetics, and differences between wrought and foundry alloys through transmission electron microscopy and atom probe tomography analysis.
Article
Nanoscience & Nanotechnology
T. K. Akopyan, N. A. Belov, N. Letyagin, F. O. Milovich, A. A. Lukyanchuk, A. S. Fortuna
Summary: The addition of indium trace has a significant impact on the structure and precipitation hardening response of Al-Si-Cu based casting alloy. Finer theta' phase precipitates with higher number density and spherical nanoparticles are formed in the alloy with trace addition. Uniaxial compression tests of peak aged samples show that the alloy with trace solute exhibits significantly higher yield strength compared to the base alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Yajie Zhao, Arunodaya Bhattacharya, Cristelle Pareige, Caleb Massey, Pengcheng Zhu, Jonathan D. Poplawsky, Jean Henry, Steven J. Zinkle
Summary: The kinetics of CrRP formation due to particle irradiation were investigated, and it was found that the formation of CrRP can be suppressed under certain irradiation conditions. The distribution of CrRP after irradiation was analyzed using atom probe tomography (APT), and a radiation modified precipitation mechanism was proposed to explain the evolution of CrRP.
Article
Nanoscience & Nanotechnology
Sang-Hwa Lee, Jae-Gil Jung, Sung-Il Baik, David N. Seidman, Min-Seok Kim, Young-Kook Lee, Kwangjun Euh
Summary: The research revealed that the formation and evolution of GPI and GPII zones during natural aging had a significant impact on the mechanical properties of the Al-7.6Zn-2.7Mg-2.0Cu-0.1Zr-0.07Ti alloy. The Zn/Mg atomic ratio, mean radius, number density, and volume fraction of the GP zones also played crucial roles in influencing the mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
S. Medrano, H. Zhao, B. Gault, F. De Geuser, C. W. Sinclair
Summary: The softening and strengthening effects in pre-deformed and aged Al-Mg-Cu alloys were evaluated using microscopy, mechanical testing and modeling. A refined model for work hardening response was found to accurately determine the precipitation hardening contribution. The mechanical response of these alloys was not significantly affected by Cu content, pre-deformation level or aging temperature, indicating robustness in terms of composition variations.
Article
Materials Science, Multidisciplinary
Jae-Gil Jung, Amir R. Farkoosh, David N. Seidman
Summary: The precipitation behavior of two L1(2)-strengthened alloys with Mg and Y additions was studied. It was found that Si-added alloy forms beta-Mg2Si precipitates at around 200 degrees C, which act as nucleation sites for the L1(2)-nanoprecipitates and cause partial depletion of Si solute atoms, resulting in a microhardness peak at 475 degrees C. The Si-free alloy has superior creep properties due to a larger lattice parameter mismatch of the L1(2)-nanoprecipitates with the Al matrix provided by higher Sc/Er/Y concentrations. Both alloys exhibit slower L1(2) nanoprecipitation-kinetics and extremely high coarsening resistance.
Article
Nanoscience & Nanotechnology
S. A. Mantri, S. Dasari, A. Sharma, Y. Zheng, H. L. Fraser, R. Banerjee
Summary: The formation and influence of isothermal phase precipitates in a metastable beta-titanium alloy, Ti-10V-2Fe-3Al, is investigated. It is found that the rejection of Al from the growing isothermal precipitates aids in their formation. The presence of alpha/omega and alpha/beta interfaces confirms that the alpha precipitates form at the beta/omega interface. Subsequent annealing at a higher temperature dissolves the precipitates and re-establishes the two-phase beta+alpha equilibrium.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
Young Mok Kim, Sangwon Lee, Ki Jeong Kim, Tae Jin Jang, Hyeon-Seok Do, Kyuseon Jang, Won Seok Choi, Min-Gu Jo, Byeong-Joo Lee, Pyuck-Pa Choi, Seok Su Sohn
Summary: In this study, Mo is used to generate strengthening phases and expand the region of a face-centered cubic (FCC) solid-solution phase at lower temperatures in the equiatomic VCoNi alloy. The substitution of Mo successfully adds a homogeneous L12 phase to provide strengthening effects and overcomes the limitations of the VCoNi alloy, but appropriate heat treatment is required to prevent brittleness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Tong Xi, Xinrui Zhang, Xueliang Yin, Chunguang Yang, Ke Yang
Summary: The behavior of Cu-rich precipitates in 316LN-Cu SS austenitic stainless steel aged at 600, 700, and 800 degrees Celsius was systematically studied. The Cu-rich precipitates were found to increase the hardness and strength of the steel, with optimal strength and elongation observed in specimens aged at 700 degrees Celsius for 6 hours. The study also revealed significant changes in the size and composition of the precipitates, as well as interface segregation effects that influenced interfacial free energies.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
S. Zeisl, A. Lassnig, A. Hohenwarter, F. Mendez-Martin
Summary: The influence of severe plastic deformation on the hardness and precipitation behavior of a Co-free maraging steel was investigated in this study. It was found that severe plastic deformation transformed the microstructure, delayed austenite reversion, and accelerated and influenced the precipitation reaction, thus affecting the characteristics of intermetallic phases.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Sang-Hwa Lee, Jae-Gil Jung, Sung-Il Baik, Sung Hyuk Park, Min-Seok Kim, Young-Kook Lee, Kwangjun Euh
Summary: The addition of Ti refines the grain size, reduces phase agglomeration, and improves the strength and ductility of the alloy, with the extrusion forming a bimodal structure of fine DRXed grains and coarse unDRXed grains.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Atekeh Abolhasani, Brian Langelier, Michael J. Worswick, Mary A. Wells, Shahrzad Esmaeili
Summary: The effects of natural aging on the strengthening behavior and microstructural characteristics of AA7xxx alloys are investigated. The study employs hardness measurement, tensile testing, differential scanning calorimetry, and atom probe tomography. It is found that AA7xxx alloys with similar copper content exhibit similar evolution of yield strength and natural aging rates. Microstructural analysis identifies three types of precipitates in the as-quenched and naturally-aged conditions of AA7075. Nucleation of Zn-Mg precipitates is the dominant precipitation phenomenon during natural aging. A reverse yield strength modeling methodology is used to analyze the natural aging kinetics of different AA7xxx alloys and validate the results with experimental data. The research demonstrates that compositional similarities lead to similar precipitation kinetics during natural aging, and the model predictions agree well with experimental results.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Qin Shen, Daozhu Huang, Wenqing Liu, Fangjie Li, Qiang Lu
Summary: This study investigated the nanoscale precipitation and mechanical properties of two CuNiAl-containing steels with different Cu contents aged at 500 degrees C. The results showed that the coprecipitation of Cu-rich and NiAl phases during aging contributed to precipitation strengthening effects. The influence of Cu content on the evolution of precipitates was studied using atom probe tomography (APT). The results demonstrated that increasing Cu content enhanced the number density of precipitates and accelerated the precipitation process. The two steels exhibited different precipitation sequences based on their Cu contents. Steel 1 with low Cu content exhibited a precipitation sequence of supersaturated solid solution, NiAl, NiAl + Cu, while Steel 2 with high Cu content presented a sequence of supersaturated solid solution, Cu, Cu + NiAl. After further aging, the precipitates in both steels transformed into Cu/NiAl co-precipitates without isolated Cu-rich phases and isolated NiAl phases.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Shipeng Shu, Anthony De Luca, David C. Dunand, David N. Seidman
Summary: Micro-additions of 0.25 at.% Mn and/or 0.10 at.% Mo to dilute Al-0.08Zr-0.014Sc-0.008Er-0.09Si alloys affect precipitate evolution and resulting strengths, providing solid-solution strengthening and improving ambient-temperature strength and elevated-temperature creep resistance. Mn-modified precipitates exhibit higher number density, while Mo-modified precipitates display improved coarsening-resistance. Both Mn and Mo additions enhance creep resistance at 300 degrees C, with Mn-bearing alloys showing a more significant effect.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Genfeng Shang, Pengzhe Gao, Fuxin Luo, Jihui Yuan, Jinfa Liao, Hang Wang
INTERNATIONAL JOURNAL OF METALCASTING
(2018)
Article
Thermodynamics
Jinfa Liao, Yuehui Liao, Hang Wang, Ligang Zhang, Yue Ma
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2019)
Article
Materials Science, Multidisciplinary
Jinfa Liao, Yuehui Liao, Hang Wang, Ligang Zhang, Yue Ma
MATERIALS RESEARCH EXPRESS
(2019)
Article
Physics, Applied
Jinfa Liao, Jiapeng Huang, Fuxin Luo, Hang Wang
Article
Materials Science, Multidisciplinary
Yunqing Zhu, Jinfa Liao, Huiming Chen, Hang Wang, Bin Yang
MATERIALS RESEARCH EXPRESS
(2020)
Article
Materials Science, Multidisciplinary
Jinfa Liao, Baojun Zhao
Summary: The FeO-SiO2-MgO-Al2O3-Cr2O3 system is widely used in studying the reactions between copper smelting slag and magnesia-chrome refractory, as well as nickel laterite smelting slags. High-temperature experiments were conducted under metallic iron saturation, determining liquidus temperatures and complex solid solutions. A pseudo-ternary section FeO-SiO2-MgO with fixed Al2O3 and Cr2O3 was constructed, showing olivine and pyroxene as the major primary phases. The study provides accurate data for high-temperature processing and thermodynamic modeling optimization.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2021)
Article
Thermodynamics
Jinfa Liao, Baojun Zhao
Summary: Phase equilibria studies have been conducted for the first time in a specific system, revealing the stabilization and extension effects of Al2O3 on spinel and melilite phases. Difference in liquidus temperatures between experimental data and FactSage calculations were observed, providing valuable insights for industrial applications and database optimization.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2021)
Article
Thermodynamics
Jinfa Liao, Baojun Zhao
Summary: This study investigates the effects of Al2O3 and Cr2O3 on liquidus temperatures and solid solutions in nickel laterite smelting slags. Comparison between experimental data and thermodynamic modelling is conducted using pseudo-binary phase diagrams, with a discussion on the reasons for the discrepancies. This analysis aims to optimize relevant databases for future applications in smelting reduction of laterite.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Baojun Zhao, Jinfa Liao
Summary: This paper reviews the history of the development of bottom-blowing copper smelting technology in China, which was initiated and developed in the 1990s. The technology involves injecting oxygen-enriched high-pressure gas to stir the molten bath consisting of matte and slag, resulting in rapid reactions at relatively lower temperatures and good adaptability of the feed materials.
Article
Materials Science, Multidisciplinary
Jinfa Liao, Baojun Zhao
Summary: The phase equilibrium information of slag is crucial for pyrometallurgical processes. The study investigated the phase equilibrium in a TiO2-containing ore in the HIsmelt process and discussed the relationship between liquidus temperatures of slag and CaO concentration as well as basicity.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Jinfa Liao, Gele Qing, Baojun Zhao
Summary: With complex raw materials for ironmaking, accurate phase equilibrium information on the slag is crucial for refining blast furnace operation and reducing energy cost and CO2 emissions. The effect of flux additions on slag phase equilibrium can be described by a pseudo-ternary system CaO-MgO-(Al2O3+SiO2) with a fixed Al2O3/SiO2 ratio of 0.4. Experimental techniques have been used to determine liquidus temperatures and solid solutions in the CaO-MgO-Al2O3-SiO2 system, and major primary phases have been identified. These findings contribute to the construction of pseudo-binary phase diagrams and the development of a thermodynamic database.
Article
Materials Science, Multidisciplinary
Feiyan Xu, Tao Weng, Keqin Tan, Jinfa Liao, Baojun Zhao, Sui Xie
Summary: The increasing arsenic content in copper concentrates globally necessitates the early removal of arsenic from copper, as it is deposited on cathode copper during the electrorefining process. Using FactSage 8.2, the effects of temperature, flux, and oxygen on arsenic distribution during copper converting and fire refining processes were studied. The results indicate that proper selection of converting and refining slags can effectively remove arsenic. Decreasing the Fe/SiO2 or Fe/CaO ratio in the converting slag promotes arsenic distribution to the slag. CaO is more effective than SiO2 in reducing the slag's liquidus temperature and arsenic content in blister copper during converting. In the fire refining process, Na2O or CaO as a flux is effective in removing arsenic.
Article
Materials Science, Multidisciplinary
Jinfa Liao, Keqin Tan, Baojun Zhao
Summary: Bottom-blowing copper smelting is a recently developed bath smelting technology in China, which has the advantages of adaptable raw materials, high oxygen utilization and thermal efficiency, and flexible production capacity. The presence of a plume eye, observed in the bottom-blowing copper-smelting furnace, is attributed to the high-pressure gas pushing away the slag on the bath surface. Through analysis of industrial samples and water model experiments, the role of the plume eye in enhancing bottom-blowing smelting was revealed, showing that direct dissolution of low-grade matte accelerates the reactions between concentrate and oxygen, thereby increasing furnace productivity. Water-model experiments also showed that the diameter of the plume eye can be increased by increasing gas flow and matte thickness, and reducing slag thickness. This work is highly significant for understanding the technology and optimizing industrial operations.
Article
Materials Science, Multidisciplinary
Lei Xu, Gele Qing, Xiangfeng Cheng, Meng Xu, Baojun Zhao, Jinfa Liao
Summary: The increased utilization of pellets in blast furnaces has implications for low-carbon ironmaking. However, low slag rates may hinder desulfurization and alkali removal in the blast furnace. This study investigates the effects of slag quantity, temperature, reaction time, and composition on these processes. Results show that higher slag quantities enhance desulfurization and alkali removal. Conversely, factors such as high temperature, long reaction time, high MgO concentration, high CaO/SiO2 ratio, and low Al2O3 concentration increase desulfurization but reduce alkali removal. The implications for operating high-proportion pellet blast furnaces are discussed.
Proceedings Paper
Materials Science, Multidisciplinary
Jinfa Liao, Chunfa Liao, Baojun Zhao
Summary: This study compares the differences between FSF and BBF technologies in copper smelting, including operating temperature, slag composition, and copper loss mechanisms. Thermodynamic and viscosity analyses provide detailed information for the selection and optimization of FSF and BBF technologies.
12TH INTERNATIONAL SYMPOSIUM ON HIGH-TEMPERATURE METALLURGICAL PROCESSING
(2022)
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)
