Article
Materials Science, Multidisciplinary
Kailin Huang, Liming Xiao, Qingkai Yang, Lu Yang, Zhuobin Li, Zhao Lu, Qingrong Yao, Jianqiu Deng, Lichun Cheng, Caimin Huang, Qianxin Long, Jiang Wang, Huaiying Zhou
Summary: The isothermal section of the La-Co-Ni ternary system at 723 K was constructed in this study and no ternary compounds were found at this temperature. The experimental results are important for the design of magnetic refrigeration materials.
Article
Materials Science, Ceramics
Zhengyue Liu, Lifeng Sun, Hui Zhao, Taiyu Xiang, Jiyu Qiu, Maofa Jiang
Summary: In this study, the phase equilibria of the CaO-SiO2-Nb2O5-Fe2O3-TiO2 system at 1200 degrees C were investigated for the first time. The solid phase coexistence region and liquidus surfaces were determined using high temperature equilibrium experiments and mathematical methods. The results provide theoretical guidance for the enrichment and extraction processes of niobium and titanium resources in the Bayan Obo tailing.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Dawei Wei, Xiaofeng Bai, Cuiping Guo, Changrong Li, Zhenmin Du
Summary: Isothermal sections at 1373 and 1473 K in the Co-Nb-Ti system were constructed using SEM/EDS, EPMA, and XRD techniques, revealing three three-phase regions and the formation of continuous solid solutions. The solubilities of Ti and Nb in the system vary at different temperatures, and no ternary compounds were observed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Dupei Ma, Zhi Li, Yan Liu, Manxiu Zhao, Jingxian Hu
Summary: This study experimentally determined the isothermal section at 1150°C and liquidus surface projection of the Ni-Ti-Ru ternary system using the equilibrated alloy method and diffusion couple method. Seven three-phase regions and a new ternary compound &t1 were discovered on the 1150°C isothermal section and liquidus surface projection. These results contribute to the thermodynamic modeling of the system and provide guidance for designing Ni-based superalloys and Ni-Ti shape memory alloys.
Article
Thermodynamics
P. P. Liu, F. L. Dai, L. Luo, D. K. Chen, Q. R. Yao, J. Wang, G. H. Rao, H. Y. Zhou
Summary: In this study, the phase equilibria and phase transitions of the Sm-Co-Fe ternary system were investigated using experimental measurements and thermodynamic calculations. The results showed that no ternary intermetallic compounds were formed, and the system exhibited continuous solid solution phases formed from two different binary intermetallic compounds. Additionally, it was found that the intermetallic compound SmCo5 with a certain solubility of Fe was stable at 1073 K.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2022)
Article
Thermodynamics
S. Y. Yanga, J. Wang, X. Liua, X. P. Zhenga, H. J. Yea, Q. R. Yaoa, Y. S. Dua, G. H. Rao, H. Y. Zhoua
Summary: The phase equilibria of the Y-Co-Fe ternary system were experimentally studied using SEM-EDS and XRD. The formation of Y2(Co, Fe)17, Y(Co, Fe)3, and Y(Co, Fe)2 solid solution phases was observed. The solubility of Fe in YCo5 and Y2Co7, and the solubility of Co in Y6Fe23 were determined. The calculated results of the thermodynamic calculation using CALPHAD method showed good agreement with the experimental results. A set of self-consistent thermodynamic parameters for the Y-Co-Fe ternary system was obtained.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
I. Fartushna, A. Samelyuk, K. Meleshevich, I. Tikhonova, V. Novichenko, M. Bulanova
Summary: This paper presents a comprehensive study on the phase equilibria in the Al-Fe-V system using various techniques, and constructs phase diagrams and isothermal lines to describe the equilibrium phases and reactions. The results show the existence of multiple phase equilibria and transformations at different temperatures.
MATERIALS CHARACTERIZATION
(2023)
Article
Thermodynamics
M. R. Tolosa, G. Aurelio, D. Arias, R. Gonzalez, N. Nieva
Summary: The Fe-rich corner of the Fe-Nb-Zr phase diagram was investigated at 1000 degrees C using SXPD technique and EPMA. The structures of MgCu2 (C15) and MgZn2 (C14), corresponding to Fe2Zr and Fe2Nb Laves phases, were observed. However, the MgNi2 (C36) structure, corresponding to Fe-2(Zr1-xNbx) Laves phase, was not found at this temperature. The present work proposes the existence of two three-phase fields and five two-phase fields.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2022)
Article
Metallurgy & Metallurgical Engineering
Qi Wei, Zhao Lu, Qing-rong Yao, Jian-qiu Deng, Jiang Wang, Huai-ying Zhou, Guang-hui Rao
Summary: The vertical sections of the La-Fe-B system were investigated using electron probe microanalysis and differential thermal analysis. Phase diagrams were drawn for three vertical sections, and the compound La2Fe14B was identified as a stable phase at high temperatures. At low temperatures, it decomposed into alpha-La, alpha-Fe, and LaFe4B4.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Materials Science, Ceramics
O. A. Kornienko, O. I. Bykov, A. V. Sameljuk, Yu. M. Bataiev
Summary: The phase equilibria and structural transformations in the ZrO2-La2O3-Eu2O3 system were studied at temperatures of 1500 and 1250 degrees C using X-ray phase and microstructural analyzes. It was found that solid solutions based on different modifications of ZrO2, La2O3, and Eu2O3 were formed, along with ordered phases with pyrochlor type structure. The solubility of La2O3 in T-ZrO2 was determined to be small, and a continuous series of solid solutions based on the Py type structure Ln(2)Zr(2)O(7) was observed at higher temperatures.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Ivana Kirkovska, Viera Homolova, Ondrej Zobac, Adela Zemanova
Summary: The present study experimentally investigated phase equilibria relations in the B-Fe-W ternary system. The results were used to model the system using the CALPHAD method, and the volume phase fractions of selected B-Fe-W alloys were determined through image analysis.
JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION
(2021)
Article
Thermodynamics
Mehdi Noori, Bengt Hallstedt
Summary: In this work, the Al-Co-Fe ternary system was thermodynamically modeled using the Calphad method, and the optimized model showed good agreement with experimental measurements.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2021)
Article
Chemistry, Physical
Xingjun Liu, Yunrui Cui, Liangfeng Huang, Mujin Yang, Feng Yang, Jinbin Zhang, Yihui Guo, Yong Lu, Cuiping Wang
Summary: Two isothermal sections of the Fe-Si-Ta ternary system were determined at 1100°C and 900°C using EPMA and XRD techniques. A new ternary compound named X was found in addition to the known G, E, and V phases. The Fe-Si-Ta system was assessed using the CALPHAD method, and reliable thermodynamic parameters were obtained. The experimental and thermodynamic data provided essential information for the establishment of the G-phase strengthen alloy database.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jiaxing Sun, Cuiping Guo, Changrong Li, Zhenmin Du
Summary: The liquidus surface projection and isothermal sections at 1100 and 1000 degrees C of the Co-Nb-Zr system were constructed. Six primary solidification areas were obtained in the liquidus surface projection, and four primary solidification areas were deduced from the binary phase diagram. Three three-phase regions at 1100 degrees C and five three-phase regions at 1000 degrees C were determined in the isothermal sections. A thermodynamic description of the Co-Nb-Zr system was established using the CALPHAD method, and reasonable models were proposed for the intermetallic phases.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Beilei Liao, Xuemei Ouyang, Huaxuan Li, Fucheng Yin, Zhi Li, Bingbing Yin, Jingxian Hu, Weibing Zhang
Summary: The phase equilibria of the Co-Al-Mo ternary system were investigated through experimental analysis and thermodynamic modeling. The isothermal sections of the system at 1150 and 900 degrees C were constructed using various analytical techniques and a new ternary compound r phase was identified. The thermodynamic modeling of the system was developed using the CALPHAD technique, and a set of self-consistent thermodynamic parameters was obtained with good agreement between experimental and calculated results.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Automation & Control Systems
Andrey Travyanov, Pavel Petrovskiy, Ivan Logachev, Andrey Lagutin, Vladimir Cheverikin, Maxim Khomutov, Dmitrii Zhigalov, Anton Klyuyev
Summary: In this study, a hybrid approach combining laser powder bed fusion and encapsulated hot isostatic pressing was successfully applied for the elaboration of titanium alloy matrix reinforced by silicon carbide fibers, demonstrating the feasibility of the proposed method. The composite part showed no defects, good contact between matrix and fibers, and significantly higher yield strength compared to parts made from bulk titanium alloy.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Metallurgy & Metallurgical Engineering
A. Ya. Travyanov, P. V. Petrovsky, V. V. Cheverikin, A. O. Lagutin, M. G. Khomutov, V. V. Luk'yanov
Summary: Joints of VT6 and VT20L titanium alloys were prepared by diffusion welding and hot isostatic pressing methods. Ti6Al4V alloy components were prepared using rolling and selective laser melting methods. Defects were found in the microstructure of specimens prepared by diffusion welding, while no defects were found in specimens prepared by hot isostatic pressing. The welded specimens exhibited high strength properties comparable to the VT20L base alloy material level.
Article
Chemistry, Physical
I. Fartushna, I. Bajenova, J. Shakirova, A. Khvan, V. Cheverikin, E. Zanaeva, A. Kondratiev
Summary: The phase equilibria in the Sm-Co, Sm-Fe, and Co-Fe-Sm systems were investigated, and the corresponding phase diagrams were constructed. The Sm-rich region in the Sm-Fe system was discovered, and the stability domains of intermetallic phases were defined. Three continuous solid solutions were found in the Co-Fe-Sm system. The phase diagram of the Sm-Co system was revised, revealing wide homogeneity regions for the SmCo5 and Sm2Co7 phases and alternative four-phase equilibria. The magnetic properties of samples containing the Sm-2(Co,Fe)(12) phase were measured and compared to literature values.
Article
Chemistry, Physical
A. K. Mohamed, V. V. Palacheva, V. V. Cheverikin, T. N. Vershinina, A. M. Balagurov, G. M. Muralikrishna, N. Esakkiraja, S. V. Divinski, G. Wilde, I. S. Golovin
Summary: This study has detected and discussed the significant differences between the properties of Fe-Ga alloys in their metastable and equilibrium states, as well as the discrepancies between existing Fe-Ga phase diagrams and the transition rates from the metastable to equilibrium state. The accurate knowledge of the equilibrium phase diagram, metastable phases, and the transition rates between different phase states towards equilibrium are necessary for both fundamental understanding and technological importance of these alloys, and further clarification is required. By utilizing a coherent set of complementary methods, including diffraction methods, scanning electron microscopy, and electron backscatter diffraction, the influence of alloy composition, annealing temperature, and annealing time on the metastable-to-equilibrium phase transitions in binary Fe-Ga has been studied. Several important changes to the low-temperature part of the binary Fe-Ga diagram near the Fe-rich corner and a new method based on interdiffusion couples for varying the structure and phase states of Fe-Ga alloys have been proposed.
Article
Materials Science, Multidisciplinary
I Fartushna, I Bajenova, A. Khvan, S. Shilundeni, V Cheverikin, M. Bulanova, A. Kondratiev
Summary: This paper for the first time defines the wide miscibility gap in the liquid phase in the Al-Fe-Sn system and investigates the evolution of the microstructure during solidification. The existence of Fe3Sn phase in the Sn-Fe system and the equilibrium participation of FeAl2 phase in the liquid phase in the ternary system were confirmed. The constructed projections and reaction scheme provide a comprehensive understanding of the Al-Fe-Sn system.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Vadim Sheremetyev, Mikhail Derkach, Anna Churakova, Aleksander Komissarov, Dmitry Gunderov, Georgy Raab, Vladimir Cheverikin, Sergey Prokoshkin, Vladimir Brailovski
Summary: Biomedical Ti-18Zr-15Nb shape memory alloy was processed through low-temperature equal channel angular pressing and post-deformation annealing. ECAP led to the formation of an inhomogeneous highly dislocated substructure, resulting in increased strength but decreased ductility and superelasticity. However, a suitable annealing treatment improved the alloy's properties, showing high strength, satisfactory ductility, and superior superelastic behavior.
Article
Thermodynamics
I. Fartushna, A. Samelyuk, A. Koval, K. Meleshevich, I. Tikhonova, M. Bulanova
Summary: The phase equilibria in the Ho-Co-Fe ternary and binary Ho-Co systems were investigated using various analysis methods. The phase diagram of the binary Ho-Co system was revised based on experimental results, while the ternary Ho-Co-Fe phase diagram was constructed. The system exhibits multiple solid solutions and invariant reactions.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2022)
Article
Chemistry, Physical
M. G. Mahmoud, Ahmed O. Mosleh, Andrey V. Pozdniakov, Waleed Khalifa, Mamdouh S. Mohamed
Summary: The present study investigates the effects of Samarium (Sm) addition on the performance of 6063 Aluminum alloy. The addition of Sm improves the solidification behavior, microstructure, and mechanical properties of the alloy. The addition of 0.1 wt% Sm significantly enhances the hardness and yield strength of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Ali Akbarpour, M. S. Parkhomenko, A. M. Khalil, V. V. Cheverikin, N. Yu. Tabachkova, E. N. Zanaeva, A. I. Bazlov
Summary: This work investigates the impact of thermomechanical treatment on the mechanical properties, structure, and crystallization of Zr65.5Ni16Cu8.5Al10 metallic glass alloy. The study reveals that thermomechanical treatment significantly alters the alloy's mechanical properties while preserving its amorphous structure through the development of chemically inhomogeneous regions within the amorphous matrix. Additionally, the alloy's initial crystallization is influenced by shear deformation, leading to a transition from one-stage to two-stage crystallization with increasing strain.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Chemistry, Physical
I. Bajenova, J. Shakirova, A. Khvan, V. Cheverikin
Summary: This study focuses on the evaluation of the phase diagram of the Fe-Ho system using SEM, EPMA, and DTA. Different alloys in the system were analyzed, revealing several congruent melting phases and eutectic reactions with their corresponding temperatures and compositions.
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Editorial Material
Chemistry, Physical
Dmitry Valeev, Alex Kondratiev
Article
Chemistry, Physical
I. Fartushna, A. Samelyuk, K. Meleshevich, T. Kabantsev, M. Bulanova
Summary: The phase diagrams of the Er-Co-Fe ternary system and boundary binary Er-Co and Er-Fe systems were studied using various techniques. Revised binary phase diagrams and updated invariant temperatures were determined. Liquidus and solidus projections, as well as the reaction scheme, were constructed for the ternary Er-Co-Fe system. Several solid solutions and compounds were identified, and primary crystallization regions were determined. The solubility of Co and Fe in various compounds and the formation of three-phase regions were also investigated.
JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION
(2023)
Article
Crystallography
Pavel Grudinsky, Dmitry Zinoveev, Alex Kondratiev, Leonid Delitsyn, Ruslan Kulumbegov, Anton Lysenkov, Pavel Kozlov, Valery Dyubanov
Summary: This study focuses on the reduction smelting of Waelz slag to produce iron-based alloy. Thermodynamic simulation and reduction smelting experiments were conducted to predict temperatures and compositions. The experiments confirmed the feasibility of Waelz slag reduction smelting from EAF dust processing.
Article
Materials Science, Multidisciplinary
Yury V. Gamin, Alexander V. Skugorev, Mukhamed M. Karashaev, Tatiana Y. Kin, Sergei P. Galkin, Abdullah Mahmoud Alhaj Ali, Vladimir V. Cheverikin
Summary: The article analyzes the microstructure evolution of Co-Cr-Mo alloy during isothermal forging. Isothermal forging can produce a high-quality microstructure for subsequent deformation processing. The required modes of ingot homogenization are determined through analysis and calculations. Isothermal forging in specific temperature and strain rate conditions allows obtaining a defect-free microstructure for further metal forming methods.
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)
