Article
Spectroscopy
A. A. Maksimova, E. V. Petrova, A. V. Chukin, B. A. Nogueira, R. Fausto, A. Szabo, Z. Dankhazi, I. Felner, M. Gritsevich, T. Kohout, E. Kuzmann, Z. Homonnay, M. I. Oshtrakh
Summary: The Bjurbole L/LL4 ordinary chondrite was studied using various analytical techniques, revealing that its composition is similar to the LL group of ordinary chondrites, with higher contents of forsterite and enstatite. Additionally, the magnetic properties of chromite, as well as the hyperfine parameters of iron in different components, were determined.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Multidisciplinary
Elzbieta Jartych, Paulina Jaskolowska, Dariusz Oleszak, Marek Pekala
Summary: This study synthesized Fe2CrSi Heusler alloy using mechanical alloying and investigated its structure and magnetic properties. The formation of a disordered BCC solid solution was observed after a certain milling time, and the desired alloy was obtained after thermal treatment. XRD analysis revealed the coexistence of two varieties of the Heusler phase. The Mossbauer spectroscopy detected a hyperfine magnetic field distribution, indicating atomic disorder in the crystalline structure. Macroscopic magnetic measurements showed that the alloy exhibited soft magnetic properties.
Article
Chemistry, Inorganic & Nuclear
Elena V. Fomenko, Galina V. Akimochkina, Yuriy V. Knyazev, Sergey V. Semenov, Vladimir V. Yumashev, Leonid A. Solovyov, Alexander G. Anshits
Summary: The recycling of hazardous industrial waste into high-tech materials with desired properties is of considerable interest. In this study, dispersed microspheres from class C fly ash were directly sintered without any additive to form high-strength glass-ceramics with magnetic properties. The optimum processing conditions were achieved at a temperature of 1200°C, at which samples with a compressive strength of 100.6 MPa were obtained. The presented results demonstrate promising industrial applications of hazardous PM10 to minimize solid waste pollution.
Article
Materials Science, Ceramics
Xi Wang, Shicheng Zhou, Kaiyang Liu, Shan Deng, Yaqi Xiao, Xiuli Chen, Huanfu Zhou
Summary: Extensive research has been conducted on microwave dielectric materials for their application in 5G and 6G communication technologies. This study broadened the sintering temperature range of MT-C ceramics using a composite of CeO2 and Mg2TiO4 ceramics, and stabilized their microwave dielectric performance. The prepared MT-C ceramics exhibited low loss and uniform density, making them suitable for industrial applications in the field of communication.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Hareem Zubairi, Fayaz Hussain, Sajida Sheikh, Asif Ahmed Shaikh, Dawei Wang, Ian M. Reaney
Summary: (1-2x) K0.5Na0.5NbO3-xBaTiO3-xBiFeO3 lead-free ceramics were fabricated using Conventional Sintering (ConS) and Cold Assisted Sintering (CAS) techniques. CAS samples showed higher relative density compared to ConS samples, despite lower sintering temperatures. The permittivity maxima for undoped KNN occurred at lower temperatures and broadened with increasing x. CAS samples exhibited higher piezoelectric coefficients and magnetization compared to ConS samples. These preliminary results demonstrate the potential of CAS to densify KNN-based ceramics at lower temperatures while retaining promising properties of permittivity, piezoelectric coefficient, and magnetization.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Chemistry, Physical
Linda Abbassi, David Mesguich, Loic Coulomb, Geoffroy Chevallier, Romain Aries, Claude Estournes, Emmanuel Flahaut, Romain Viennois, Mickael Beaudhuin
Summary: In this paper, a simple route to synthesize nano-beta-FeSi2 material is reported. The impact of spark plasma sintering parameters on the material properties is studied. Experimental results show that high-density nano-beta-FeSi2 pellets can be obtained using this method in a short time.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
D. Garzon, J. E. Diosa, C. Ostos, F. H. Sanchez, G. A. Munoz Medina, F. Sieves, O. Arnache
Summary: (Fe30Cu70)(96)B-4 (FCB) alloys were prepared by mechanical milling and characterized for structural, morphological, and magnetic properties with increasing milling time. The nanoparticles formed after 12 hours of milling exhibit superparamagnetic-like behavior at temperatures below 60 K despite being ferromagnetic at room temperature. The saturation magnetization and coercive field values change with milling time.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Multidisciplinary
A. Ibrahim, Y. Arita, A. S. Ali, I. Khan, B. Zhang, M. Razum, L. Pavic, A. Santic, Z. Homonnay, E. Kuzmann, M. Y. Hassaan, J. Wang, S. Kubuki
Summary: Iron-vanadium-phosphate glass and glass ceramics show promise as a cathode material for lithium-ion batteries due to their low cost and non-toxic characteristics. The addition of Fe2O3 improves the local structure and cyclability of the xFe2O3.(60-x)V2O5.40P2O5 glass and glass ceramics, making them a potential active material for high-performance cathodes in LIBs.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Biochemistry & Molecular Biology
Alvaro Javier Gomez Rodriguez, Dagoberto Oyola Lozano, Humberto Bustos Rodriguez, Yebrail Rojas Martinez, German Antonio Perez Alcazar, Ligia Edith Zamora Alfonso, Juan Sebastian Trujillo Hernandez
Summary: The objective of this study is to evaluate the applicability of exchange coupling between nanoparticles of Nd2Fe14B and Fe90Al10 as permanent magnets produced by surfactant-assisted mechanical alloying. The results show a significant decrease in coercive force with temperature and percentage of soft phase during the sintering process.
Article
Nanoscience & Nanotechnology
Damien Bregiroux, Julie Cedelle
Summary: The study found that by controlling the sintering temperature during SPS, ZnS ceramics with small grain size and almost full density could be obtained, but higher temperatures could lead to grain growth, affecting mechanical properties. Keeping the grain size below 100 nm appears to be the key to developing high-performance ZnS functional ceramics.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Ceramics
Zhao Li, Guixiang Liu, Yong Ren, Fang Xu, Bo Dai, Yong Zhao, Xingwu Yuan, Jiongming Li, Dengjian Ye
Summary: The effects of different parameters of spark plasma sintering (SPS) on LiNiZn ferrite ceramics were investigated. Compared with traditional sintering, SPS resulted in finer, more uniform grains, denser structure, higher saturation magnetization, and lower ferromagnetic resonance linewidth. The cation distribution was analyzed and a method of judging specific saturation magnetization was proposed. SPS can effectively improve the magnetic properties of ferrite ceramics and provide an alternative pathway for high-performance soft magnetic ferrite.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Gulzar Ahmad Lone, Mohd Ikram
Summary: The magnetic measurements of CoFe2-xNixO4 were investigated and it was found that the coercive field decreases with increasing doping content, indicating lower magneto-crystalline anisotropy of Ni2+ compared to Fe3+. The merging of FC-ZFC curves and the observation of sextets in Mossbauer spectroscopy suggest that the samples are ferrimagnetic. The bandgap energy calculated from Tauc plots shows the semiconducting behavior of the samples.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Hicham Mahfoz Kotb, Hassan A. Khater, Osama Saber, Mohamad M. Ahmad
Summary: NSCTO ceramics were prepared by reactive sintering solid-state reaction, and the influence of sintering temperature on structural and dielectric properties was thoroughly studied. The ceramic sample sintered at 1025 degrees C showed the best compromise between colossal relative permittivity and low dielectric loss values.
Article
Materials Science, Ceramics
Varsha C. Pujari, Pramod D. Mhase, Rohini M. Mahindrakar, Sher Singh Meena, Sanjay R. Kamble, Sunil M. Patange, Santosh S. Jadhav
Summary: Different Nd doping concentrations of Ba-Ca hexaferrites were synthesized using sol-gel auto-ignition method. The results showed that Nd doping modulated the magnetic behavior of the hexaferrites, resulting in moderate saturation magnetization and high coercivity values.
CERAMICS INTERNATIONAL
(2023)
Review
Chemistry, Multidisciplinary
Tomasz K. Pietrzak, Marek Wasiucionek, Jerzy E. Garbarczyk
Summary: This review article presents recent studies on nanostructured glass-ceramic materials with improved electrical conductivity or extended temperature stability range of highly conducting high-temperature crystalline phases. The conductivity enhancement is closely correlated with the dual microstructure of the glass-ceramics, and the study of their properties has been aided by various experimental techniques.
Article
Chemistry, Physical
Anton S. Voronin, Yurii V. Fadeev, Mstislav O. Makeev, Pavel A. Mikhalev, Alexey S. Osipkov, Alexander S. Provatorov, Dmitriy S. Ryzhenko, Gleb Y. Yurkov, Mikhail M. Simunin, Darina V. Karpova, Anna V. Lukyanenko, Dieter Kokh, Dashi D. Bainov, Igor A. Tambasov, Sergey V. Nedelin, Nikita A. Zolotovsky, Stanislav V. Khartov
Summary: Embedded copper mesh coatings with low sheet resistance and high transparency were successfully formed, showing excellent optoelectric characteristics and electromagnetic shielding efficiency. The coatings exhibited high bending stability and strong adhesion, making them suitable for shielding transparent objects.
Article
Chemistry, Multidisciplinary
Galina Trebeleva, Konstantin Glazov, Andrey Kizilov, Anastasya Kizilova, Vladlen Yurkov, Gleb Yurkov
Summary: The article presents the experience of the Markul Expedition of the Institute of Archeology of the Russian Academy of Science, which utilized digital technologies for the study, preservation, and popularization of cultural heritage. The expedition used geographic information systems (GIS) and photogrammetry to obtain a complete picture of the historical and cultural landscape of Northwestern Colchis in antiquity. The final visualizations required corrections and hand drawing due to vegetation and shooting conditions, resulting in some differences from the original samples.
APPLIED SCIENCES-BASEL
(2022)
Article
Polymer Science
Gleb Yu Yurkov, Alexander Kozinkin, Oleg Shvachko, Stanislav P. Kubrin, Evgeny A. Ovchenkov, Maxim S. Korobov, Vladislav E. Kirillov, Alexey S. Osipkov, Mstislav O. Makeev, Dmitry S. Ryzhenko, Vitaly Solodilov, Elena A. Burakova, Vyacheslav M. Bouznik
Summary: This paper investigates the structure and magnetic characteristics of Co@Fe2O3-FeF2 nanoparticles localized on the surface of polytetrafluoroethylene microgranules. The nanoparticles consist of a metallic cobalt core surrounded by a surface shell of Fe2O3 and FeF2. The material exhibits a blocking temperature of 200K and residual magnetization from 4.2K to 300K.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Review
Polymer Science
Alexander Fionov, Ivan Kraev, Gleb Yurkov, Vitaly Solodilov, Alexander Zhukov, Anastasia Surgay, Iren Kuznetsova, Vladimir Kolesov
Summary: This article reviews the development, creation, and investigation of modern polymeric nanocomposite materials used for shielding electromagnetic radiation. It discusses the interaction mechanisms of electromagnetic radiation with conductive layers and the effects of layer thickness, conductivity, and permittivity on absorption and reflection of electromagnetic waves. The article also emphasizes the importance of developing innovative polymer composite materials for shielding electronic devices and ensuring their safe and uninterrupted operation.
Article
Materials Science, Ceramics
G. Yu Yurkov, D. A. Pankratov, Yu. A. Koksharov, Ye. A. Ovtchenkov, A. V. Semenov, R. A. Korokhin, G. I. Shcherbakova, L. V. Gorobinskiy, E. A. Burakova, A. V. Korolkov, D. S. Ryzhenko, V. I. Solodilov
Summary: In this study, composite materials consisting of a ceramic matrix and metal iron nanoparticles were prepared by sintering iron (II) oxalate and polycarbosilane. The chemical composition of the material can be controlled by the sintering process. It was found that the size of iron-containing particles changes after calcination, especially under air atmosphere where the particles decrease in size.
CERAMICS INTERNATIONAL
(2022)
Article
Biochemistry & Molecular Biology
Arina G. Kicheeva, Ekaterina S. Sushko, Lyubov S. Bondarenko, Kamila A. Kydralieva, Denis A. Pankratov, Nataliya S. Tropskaya, Artur A. Dzeranov, Gulzhian I. Dzhardimalieva, Mauro Zarrelli, Nadezhda S. Kudryasheva
Summary: The current study investigates the role of reactive oxygen species (ROS) in the bioeffects of different types of magnetite nanoparticles (MNPs) - bare (Fe3O4), humic acids (Fe3O4-Ha), and 3-aminopropyltriethoxysilane (Fe3O4-APTES) modified MNPs. The study found that Fe3O4-HA MNPs had the lowest amount of Fe2+ ions, while Fe3O4-APTES MNPs had the highest amount of Fe2+ ions. Bioluminescent cellular and enzymatic assays were used to monitor the toxicity and antioxidant activity of the MNPs. The results showed that the modified MNPs had toxic effects at higher concentrations (>10(-2) g/L) and stimulated ROS production by bacteria in a wide concentration range (10(-15)-1 g/L).
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Alexander V. Gorokhovsky, Gleb Yu. Yurkov, Igor N. Burmistrov, Angel F. Villalpando-Reyna, Denis V. Kuznetsov, Alexander A. Gusev, Bekzod B. Khaidarov, Yuri V. Konyukhov, Olga V. Zakharova, Nikolay V. Kiselev
Summary: Pyroxene glass-ceramic enamels based on blast furnace slag and additives were developed for high temperature protective coatings on carbon steel. The coatings exhibited excellent adhesion, low thermal conductivity, high thermal resistance, wear and chemical resistance, and thermal shock resistance. These cost-effective coatings can be used in corrosive atmospheres and abrasive environments at temperatures up to 1100℃.
Article
Chemistry, Inorganic & Nuclear
Artur Dzeranov, Lyubov Bondarenko, Denis Pankratov, Gulzhian Dzhardimalieva, Sharipa Jorobekova, Daniel Saman, Kamila Kydralieva
Summary: The use of iron oxide nanoparticles, particularly for commercial purposes, requires strict preservation of their phase composition. The choice of nanoparticle modifier and modification conditions is crucial due to their sensitivity to oxygen under real conditions. This study investigated the phase composition changes of magnetite nanoparticles after modification and oxidation, and found that the nonstoichiometric nature of the nanoparticles increased. Furthermore, both XRD and Mössbauer spectroscopy provided valuable information about the ionic composition and distribution of iron ions in the nanoparticles.
Article
Chemistry, Inorganic & Nuclear
Artur Dzeranov, Lyubov Bondarenko, Denis Pankratov, Mikhail Prokof'ev, Gulzhian Dzhardimalieva, Sharipa Jorobekova, Nataliya Tropskaya, Ludmila Telegina, Kamila Kydralieva
Summary: This study analyzes a group of iron oxide nanoparticles as potential candidates for ferroptosis therapy, focusing on their phase state, magnetic characteristics, and the release of Fe2+/Fe3+ as ROS mediators. The results suggest that Fe3O4 and γ-Fe2O3 show promise as magnetically controlled carriers due to their saturation magnetization and surface area. The evaluation of Fe2+/Fe3+ ion release as catalysts for the Fenton reaction reveals that all nanoparticles, except α-FeOOH-Fe2+, are preferable for controlling Fenton catalysis. The high concentration of iron ions released by α-FeOOH-Fe2+ makes it suitable as an aid therapy agent.
Article
Polymer Science
Vitaliy Solodilov, Valentin Kochervinskii, Alexey Osipkov, Mstislav Makeev, Aleksandr Maltsev, Gleb Yurkov, Boris Lokshin, Sergey Bedin, Maria Shapetina, Ilya Tretyakov, Tuyara Petrova
Summary: This study focuses on the structure and thermomechanical properties of PVDF-based ferroelectric polymer film. Transparent electrically conductive ITO coatings are applied to both sides of the film, giving it additional functional properties such as piezoelectric and pyroelectric effects. The deposition temperature and time of the ITO layers have little effect on the thermal and mechanical properties of the PVDF film, but slightly lower its piezoelectric properties.
Article
Chemistry, Multidisciplinary
Tuyara V. Petrova, Ilya V. Tretyakov, Aleksey V. Kireynov, Elena O. Platonova, Polina F. Ponomareva, Olga V. Alexeeva, Vitaliy I. Solodilov, Gleb Yu. Yurkov, Alexander Al. Berlin
Summary: The authors proposed a novel approach to evaluate the self-healing effect in carbon fiber reinforced plastics (CFRP) at the micro- and macro-levels using dynamic mechanical analysis (DMA) and double-cantilever beam delamination methods. A modified epoxy resin with self-healing properties was used as the matrix for CFRP. The flexural modulus (E') of microsamples with delaminations and the specific delamination energy (G(IR)) of macrosamples with initial cracks were chosen as criteria for evaluating the self-healing ability. The study showed that the E' and G(IR) parameters were sensitive to the applied initial cracks, and a high degree of healing could be achieved within 48 hours.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Konstantin Glazov, Galina Trebeleva, Ivan Abornev, Andrey Kizilov, Vladlen Yurkov, Gleb Yurkov
Summary: This article discusses the long-term goal of 3D reconstruction of the Great Pitiunt Fortress. Excavations revealed traces of a mosaic floor in one of the temples, which needed to be restored for a full reconstruction. Although only 33 square meters of the mosaic was found, representing 10.5% of the total interior area, it was possible to create a version of the reconstructed mosaic floor based on various factors such as the direction of dividing borders, symmetry requirements, motif adjustments, and analysis of contemporaneous sites. The article presents the methods used, an analysis and justification of the reconstructed design, and a final model.
APPLIED SCIENCES-BASEL
(2023)
Article
Biochemistry & Molecular Biology
Alexander Gorokhovsky, Natalia Morozova, Gleb Yurkov, Olga Grapenko, Alexander Kozinkin, Alexei Kozakov, Anatoliy Nikolskiy, Elena Tretyachenko, Andrey Semenov, Vitaliy Solodilov
Summary: It has been found that potassium polytitanate powder (PPT) synthesized at 500°C by treating powdered TiO2 with a mixture of KOH and KNO3 is a low-cost and efficient catalyst for the decomposition of H2O2 in aqueous solutions. The catalytic activity of PPT depends on the weight ratio of [TiO2]:[KOH]:[KNO3], and increases with the amount of KNO3. This increase in catalytic activity is attributed to the increased concentration of Ti4+-O(H)-Ti4+ groups on the surface of PPT.
Article
Polymer Science
Ilya V. Tretyakov, Tuyara V. Petrova, Aleksey V. Kireynov, Roman A. Korokhin, Elena O. Platonova, Olga V. Alexeeva, Yulia A. Gorbatkina, Vitaliy I. Solodilov, Gleb Yu. Yurkov, Alexander Al. Berlin
Summary: This work aims to investigate the impact resistance of epoxy oligomer matrices (EO) modified with polysulfone (PSU) or polyethersulfone (PES) and their glass fiber reinforced plastics (GFRP) under low-velocity impact conditions. The study found that the fracture energy of GFRP depends on the concentration and type of modifying polymer. The introduction of PSU into EO resulted in an increase in strength and fracture energy for modified matrices and GFRP, while the opposite effect was observed for PES modification. The study also established correlations between fracture energy and strength of EO + PES matrices and GFRP.
Article
Physics, Atomic, Molecular & Chemical
A. M. Zhukov, V. I. Solodilov, I. V. Tretyakov, E. A. Burakova, G. Yu. Yurkov
Summary: In this study, iron-containing composites with nanoparticles were synthesized using a thermal decomposition method in a polyethylene melt. The synthesized nanoparticles were characterized using various techniques and were found to have a complex composition. The results showed that polyethylene filled with particles synthesized from iron pentacarbonyl had a higher elastic modulus, and the particle-modified matrix exhibited better inhibition of microbial growth.
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B
(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)
