Article
Chemistry, Physical
Munmun Basak, Md Lutfor Rahman, Md Farid Ahmed, Bristy Biswas, Nahid Sharmin
Summary: Cobalt ferrite nanoparticles were synthesized using co-precipitation technique with different precipitating agents, affecting the structure and size distribution. Various analysis methods showed highly correlated results, with SSP method being the most compatible.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
A. Mazumdar, A. Thamizhavel, V Nanal, R. G. Pillay, A. Upadhyay, V. Vatsa, A. Reza, A. Shrivastava, Bhagyashree Chalke, S. Mallikarjunachary
Summary: This study investigates the transformation between the metallic (beta) and semiconducting (alpha) allotropes of tin, as well as the inconsistency in phase transition temperature. A protocol to reduce the formation of alpha-Sn has been proposed based on measurements, which could be useful in experiments utilizing superconducting tin-based detectors.
SCRIPTA MATERIALIA
(2021)
Article
Physics, Applied
Marcus Newton, Ulrich Wagner, Christoph Rau
Summary: Correlated electronic materials, such as vanadium dioxide, exhibit strong coupling between lattice, spin, and orbital degrees of freedom, leading to emergent behavior that is useful for next-generation technologies. In this study, coherent X-ray diffraction measurements were performed on a single nanocrystal of vanadium dioxide to investigate the origin of observed distortions in the diffraction pattern, comparing the experimental findings with ab-initio simulations.
APPLIED PHYSICS EXPRESS
(2022)
Review
Nanoscience & Nanotechnology
Stephanie Spence, Wah-Keat Lee, Feng Lin, Xianghui Xiao
Summary: TXM, a powerful tool in battery research, offers morphological and chemical structural information inside of battery component materials at tens of nanometer scale. This article presents a short review of TXM, including its instrumentation, battery research applications, and practical sample preparation and data analysis. The article also briefly discusses the challenges and opportunities in TXM applications.
Article
Energy & Fuels
Mehmet Erman Mert
Summary: The study investigated the efficiency of hydrogen production by doping nickel foam precursors with nickel, cobalt particles, and decorating with silver nano-domes. The catalyst NF/NiCo-2/Ag showed the best performance in terms of lower hydrogen overpotential, higher HPE, stability, and response during the electrolysis process in 1 M KOH.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Masaki Tahara, Kazuya Hasunuma, Hideki Hosoda
Summary: This study investigated the decomposition process of the isothermal alpha '' phase in beta-Ti alloys, and found that the resulting alpha + beta dual phase inherited the microstructural characteristics of the alpha ''(iso) phase. The research results indicate the existence of a strict variant selection rule between the decomposed alpha and beta phases, with a specific variant combination observed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Mingyang Cao, Mingqiang Li, Siyuan He, Jinying Yu
Summary: A new type of water-based rechargeable zinc-ion battery is proposed, which exhibits high reversible specific capacity and cycling stability. Experimental studies confirm that the reversible deintercalation-intercalation of zinc ions in the cathode is the reaction mechanism of the battery.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Nanoscience & Nanotechnology
Ruixin Sheng, Zhinan An, Andew C. -P. Chuang, Xie Xie, Peter K. Liaw, Yang Tonga
Summary: The viscoelasticity-induced structural change in Zr55Cu30Ni5Al10 metallic glass and amorphous selenium was investigated using synchrotron X-ray diffraction. Two types of structural anisotropy, characterized by residual elastic strain or heterogeneous intensity of diffraction rings, were observed by analyzing the two-dimensional diffraction pattern. The origin of the structural anisotropy is attributed to topological rearrangement in the metallic glass and conformation rearrangement in the amorphous selenium. These findings provide a structural identity to the phenomenological structureless deformation defect widely observed in different amorphous materials.
SCRIPTA MATERIALIA
(2023)
Article
Multidisciplinary Sciences
Jennifer Donohue, Steven E. Zeltmann, Karen C. Bustillo, Benjamin Savitzky, Mary Ann Jones, Gregory F. Meyers, Colin Ophus, Andrew M. Minor
Summary: Understanding and visualizing the heterogeneous structure of immiscible semicrystalline polymer systems is crucial for optimizing their morphology and microstructure. In this study, a cryogenic 4D-STEM technique was used to map the distribution of both crystalline and amorphous phases in an iPP/EO multilayer film. The resulting map revealed a sharp interface between the amorphous iPP and EO, indicating their incompatibility and immiscibility.
Article
Chemistry, Physical
D. V. Lazurenko, I. Yu. Petrov, V. I. Mali, M. A. Esikov, R. I. Kuzmin, V. V. Lozanov, F. Pyczak, A. Stark, G. D. Dovzhenko, I. A. Bataev, D. S. Terentiev, A. A. Ruktuev
Summary: This study aims to improve the brittleness issue of Ti-Al3Ti metal-intermetallic laminate composites by changing the crystal structure of Al3Ti to the more ductile L12 structure through alloying with silver. The optimal fabrication regimes of Ti-Ti(Al1-xAgx)3 composites were determined based on in-situ synchrotron X-ray diffraction analysis, leading to enhanced properties of the composite material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Daria Lazurenko, Victor V. Lozanov, Andreas Stark, Florian Pyczak, Alexey A. Ruktuev, Kemal Emurlaev, Lin Song, Ivan A. Bataev, Ivan Ivanov, Tatiana S. Ogneva, Anatoly A. Bataev
Summary: Ti-Al3Ti composites have attracted attention for their outstanding mechanical properties, but limited by the low ductility and fracture toughness of Al3Ti phase. This study discusses stabilizing the L1(2) structure of titanium trialuminide as a promising way to improve composite properties, with Zn and Ag found to be the most efficient stabilizers.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Multidisciplinary Sciences
Yuting Luo, Shahed Rezaei, David A. Santos, Yuwei Zhang, Joseph Handy, Luis Carrillo, Brian J. Schultz, Leonardo Gobbato, Max Pupucevski, Kamila Wiaderek, Harry Charalambous, Andrey Yakovenko, Matt Pharr, Bai-Xiang Xu, Sarbajit Banerjee
Summary: This study examines the differences in electrochemical performance of V2O5 insertion electrodes with different crystal structures. The results show that the tunnel-structured V2O5 electrode has a simpler insertion mechanism and better battery performance compared to the layered V2O5 electrode, which undergoes a series of phase transformations and distortions, resulting in larger voltage hysteresis and capacity loss.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Physical
J. Fiocchi, A. Mostaed, M. Coduri, A. Tuissi, R. Casati
Summary: This study investigates the improvement of mechanical behavior of high entropy alloys (HEAs) through dedicated thermal treatments, which produce nanostructured microstructures with enhanced characteristics. Advanced characterization techniques reveal the decomposition of the supersaturated solid solution in an equiatomic CoCuFeMnNi alloy, leading to the formation of Cu-rich clusters and discs. The modulation of composition significantly enhances the mechanical strength, and the ageing treatment improves the mechanical behavior of the alloy at cryogenic temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Pharmacology & Pharmacy
Jacob Rune Jorgensen, Wolfgang Mohr, Matthias Rischer, Andreas Sauer, Shilpa Mistry, Anette Mullertz, Thomas Rades
Summary: In this study, the stability and intrinsic dissolution of vacuum compression molded (VCM) amorphous solid dispersions (ASDs) of efavirenz (EFV) were investigated. The solubility limits of EFV in seven polymers were determined using the melting point depression (MPD) method. The study found that combining preformulation miscibility determination and dissolution studies is important for rational decision-making regarding the stability and viability of ASD formulations.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
Review
Metallurgy & Metallurgical Engineering
Youhong Peng, Kesong Miao, Wei Sun, Chenglu Liu, Hao Wu, Lin Geng, Guohua Fan
Summary: Characterizing the microstructure and deformation mechanism of metallic materials is crucial for understanding the microstructure-property relationship. Advanced synchrotron radiation facilities have enabled non-destructive visualization of full-field structural information in three dimensions, contributing to significant progress in recent decades. Future innovations in next-generation synchrotron radiation and emerging technologies hold great potential for further advancements in material characterization.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2022)
Review
Materials Science, Multidisciplinary
Dina Dudina, Konstantinos Georgarakis, Eugene A. Olevsky
Summary: This review discusses the application of field-assisted sintering in the powder metallurgy processing of aluminium and magnesium matrix composites, and presents the characteristics of materials obtained by spark plasma sintering, microwave sintering, and induction sintering.
INTERNATIONAL MATERIALS REVIEWS
(2023)
Article
Engineering, Mechanical
A. D. Berezner, V. A. Fedorov, M. Yu. Zadorozhnyy, I. S. Golovin, D. V. Louzguine-Luzgin
Summary: Deformation of a Cu-Pd-P amorphous alloy was studied under various frequencies of mechanical load, showing that the deformation can be interpolated using a hyperbolic function and is influenced by the combination of heating and cyclic mechanical loading.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Chemistry, Physical
Yu P. Ivanov, V. O. Semin, Z. Lu, J. Jiang, A. L. Greer, D. Louzguine-Luzgin
Summary: The heating of a metallic glass with nominal composition Mg(75)Ni(20)Mm(5) revealed primary crystallization to Mg2Ni. The study of this crystallization process showed complexity in crystal shape, linear growth, and internal disorder within the crystal.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
A. K. A. Lu, D. V. Louzguine-Luzgin
Summary: The addition of a small amount of Zr to Cu significantly improves the glass forming ability of the alloy by increasing the incubation time and slowing down crystal growth. Molecular dynamics simulations and analysis provide insights into the crystal nucleation and growth processes, obtaining important values such as the critical cooling rate and growth rate of FCC Cu crystals in Cu-rich alloys, and observing the impact of Zr concentration gradient on crystal growth.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Multidisciplinary Sciences
Peihao Sun, Giulio Monaco, Peter Zalden, Klaus Sokolowski-Tinten, Jerzy Antonowicz, Ryszard Sobierajski, Yukio Kajihara, Alfred Q. R. Baron, Paul Fuoss, Andrew Chihpin Chuang, Jun-Sang Park, Jonathan Almer, J. B. Hastings
Summary: Liquid polymorphism is an interesting phenomenon observed in some single-component systems. By studying supercooled liquid Te, this research observes clear maxima in its thermodynamic response functions around a specific temperature, suggesting the possible existence of liquid polymorphism. The underlying structural evolution reveals the development of intermediate-range order, particularly around the temperature of the thermodynamic maxima, which is attributed to bond-orientational ordering. The similarities with water indicate that water-like anomalies may be a common phenomenon in liquid systems with competing bond-and density-ordering.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Materials Science, Multidisciplinary
V. O. Semin, J. Jiang, R. Y. Umetsu, D. V. Louzguine-Luzgin
Summary: This study investigates three types of Fe-Ni-based materials prepared by radio frequency magnetron sputtering and analyzes their phase composition and nanostructure. The thermally crystallized Fe-Ni-Pt-Zr samples exhibit the best combination of magnetic properties among the deposited films.
Article
Multidisciplinary Sciences
Anna Lapinska, Natalia Grochowska, Jerzy Antonowicz, Przemyslaw Michalski, Kamil Dydek, Anna Duzynska, Agata Daniszewska, Milena Ojrzynska, Klaudia Zeranska, Mariusz Zdrojek
Summary: This study explores the pressing problem of insufficient homogeneity in nanocomposites' production and its impact on material properties. The effects of different mixing techniques on filler distribution and resulting structural and thermal properties were evaluated. The results show that the concentration of graphene significantly influences polymer chain mobility, grain sizes, defect density, and cross-linking level.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Multidisciplinary
Yu-Zhang Jiao, Dmitry V. Louzguine-Luzgin, Ke-Fu Yao, Zheng-Jun Zhang, Na Chen
Summary: In this study, a magnetic semiconductor with a high Curie temperature is presented for the development of spintronic devices in next-generation computing systems. The semiconductor exhibits low resistivity and high saturation magnetization at room temperature, and forms a heterojunction with p-type silicon, showing rectifying characteristics. These findings provide design principles for high Curie temperature magnetic semiconductors with determined conduction types, which are crucial for realizing nonvolatile spin-based transistors in information technology beyond Si-based systems.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2023)
Article
Chemistry, Physical
D. V. Louzguine-Luzgin, Yu. P. Ivanov, A. L. Greer
Summary: The crystallization behavior of a Cu58Y37Sc5 metallic glassy alloy was investigated using various methods. Differential scanning and isothermal calorimetries were performed to study the phase transformations. X-ray diffractometry studies showed the simultaneous formation of Cu2Y, CuY, and CuSc crystalline phases, indicating eutectic crystallization, while the isothermal crystallization kinetics corresponded to primary crystallization. Transmission electron microscopy observations revealed a complex crystallization process involving heterogeneous nucleation on pre-existing particles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Vyacheslav I. Kvashnin, Dina Dudina, Boris B. Bokhonov, Sergey A. Petrov, Arina V. Ukhina, Konstantinos Georgarakis, Francisco Gil Coury, Guilherme Yuuki Koga
Summary: In this study, a glassy Fe66Cr10Nb5B19 alloy and its crystalline counterpart were spark plasma sintered with aluminum at 570 degrees C to investigate the interfacial reactions in the systems. It was found that in the mixture containing the crystalline alloy, alpha-(Fe,Cr) and Fe2B reacted with aluminum forming the Fe-Al inter-metallic reaction products. The absence of alpha-(Fe,Cr) and Fe2B in the composite sintered from the glassy alloy was confirmed by Mo center dot ssbauer spectroscopy. Overall, the crystalline alloy showed higher reactivity towards aluminum than the glassy alloy, which can be attributed to the presence of alpha-(Fe,Cr), a Fe-rich phase.
Article
Nanoscience & Nanotechnology
D. V. Louzguine-Luzgin, E. N. Zanaeva, F. R. Pratama, T. Wada, S. Ito
Summary: The structural features of Pd42.5Cu30Ni7.5P20 and Pt42.5Cu27Ni9.5P21 metallic glasses were examined using high-resolution transmission electron microscopy. Pd42.5Cu30Ni7.5P20 exhibited true bulk glass-forming behavior without crystalline particles/nuclei, while Pt42.5Cu27Ni9.5P21 was a crystal growth-controlled bulk glass-former containing nanoparticles with a different chemical composition and an average size of about 1 nm. These structural differences influenced the mechanical properties at room temperature. Thermodynamic calculations supported the observed features.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Composites
Dina V. Dudina, Vyacheslav I. Kvashnin, Boris B. Bokhonov, Mikhail A. Legan, Aleksey N. Novoselov, Yuliya N. Bespalko, Alberto Moreira Jorge Jr, Guilherme Y. Koga, Arina V. Ukhina, Alexandr A. Shtertser, Alexander G. Anisimov, Konstantinos Georgarakis
Summary: The microstructural features and mechanical properties of composites formed by spark plasma sintering of Al + 20 vol.% Fe and Al + 20 vol.% Fe66Cr10Nb5B19 mixtures composed of micrometer-sized particles were investigated. The pressure applied during sintering affected the thickness of reaction products formed between the iron particles and aluminum. The nature of reinforcement particles played a significant role in determining the hardness and compressive strength of the composites.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Chemistry, Physical
S. Romankov, Y. C. Park, Y. Miyauchi, D. V. Louzguine-Luzgin, S. Komarov
Summary: W-based alloyed coatings with variable W content were fabricated on Ti and steel substrates using different combinations of W milling balls. The coatings displayed heterogeneous nanocomposite structures, and the composition and microstructures could be tailored through the selection of milling balls. The hardness and wear resistance of the coatings were influenced by the W content and microstructure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Dina V. Dudina, Vyacheslav I. Kvashnin, Alexander A. Matvienko, Anatoly A. Sidelnikov, Alexander I. Gavrilov, Arina V. Ukhina, Alberto Moreira Jorge, Konstantinos Georgarakis
Summary: Metallic-glass-reinforced metal matrix composites are a new type of composite materials, in which amorphous alloys act as reinforcement. This study investigated the morphology of the reaction products formed when Fe66Cr10Nb5B19 metallic glass particles interacted with aluminum. The composites were processed using spark plasma sintering, hot pressing, or a combination of both. The reaction products observed included dense layers covering the alloy cores, needles protruding from the shells, and needles and platelets distributed in the aluminum matrix. The role of the liquid phase in the structure formation and the occurrence of pores due to the Kirkendall effect were discussed.
CHEMISTRY-SWITZERLAND
(2023)
Article
Materials Science, Multidisciplinary
D. V. Louzguine-Luzgin, K. Shinozaki
Summary: In this study, glassy oxide/metallic composite materials were produced by sintering powdered oxide glass reinforced with metallic glassy ribbons in the supercooled liquid regions. The composite samples exhibited better mechanical properties compared to single phase oxide samples.
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)
