Article
Materials Science, Multidisciplinary
P. Minarik, M. Zemkova, J. Vesely, F. Lukac, J. Bohlen, M. Knapek, R. Kral
Summary: The study shows that magnesium-rare earth metal alloys, such as Mg-4Y-3Nd, can benefit from the utilization of sufficiently high sintering temperature and pressure during spark plasma sintering, leading to improved diffusion between powder particles and successful powder consolidation by destabilizing and shattering oxide shells through severe diffusion of rare earth metals.
Article
Nanoscience & Nanotechnology
Michal Knapek, Peter Minarik, Adam Gres, Maria Zemkova, Frantisek Lukac, Jan Bohlen, Frantisek Chmelik, Robert Kral
Summary: This study utilized the spark plasma sintering (SPS) technique to prepare a Mg-4wt.%Y-3wt.%Nd material (WN43) with outstanding mechanical properties and excellent plastic elongation. By suppressing the detrimental effect of oxide shells on the powder particles, the strong interconnection of the particles was achieved. The material retained the fine powder microstructure and exhibited ductility and strength comparable to conventionally-prepared Mg-RE alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Minoru Maeda, Akiyoshi Matsumoto, Gen Nishijima, Yoon-Uk Heo, Seungyong Hahn, Sangjin Lee, Seyong Choi, Jung Ho Kim
Summary: In this study, the researchers proposed a method of regulating porous properties using magnesium powder blending. Through a detailed investigation, they found a significant correlation between various particle parameters, impurities, superconducting transition temperature, and current carrying capacity, with the porous properties. The blending of raw powders with spherical shape allowed for tuning of morphological structures and crystallinities inside the cores of the MgB2 superconducting wires, resulting in superior superconducting properties. This finding provides valuable insights for the widespread use and application of superconducting materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Elumalai Pc, Ganesh Radhakrishnan, Shankar Emarose
Summary: In this study, monolithic pure magnesium and magnesium composites with different proportions of TiO2 nanoparticles were synthesized using powder metallurgy technique and processed by two-stage hybrid microwave sintering and hot extrusion. The results showed that the mass density and microhardness of the composite materials increased steadily with the addition of TiO2 nanoparticles, with the Mg5TiO2 composite exhibiting the highest compressive strength.
MATERIALS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Xuebin Chen, Lei Zhao, Dongling Li, Liwu Jiang, Haizhou Wang
Summary: After adding different mass percentages of tungsten powder to H13 mold steel and microwave sintering, the Vickers hardness values of the samples were found to be positively correlated with tungsten content, and the grain size decreased with increasing tungsten content.
Article
Metallurgy & Metallurgical Engineering
Michal Knapek, Maria Zemkova, Adam Gres, Eva Jablonska, Frantisek Lukac, Robert Kral, Jan Bohlen, Peter Minarik
Summary: Alloying magnesium with rare-earth elements has been shown to improve material performance, and the novel WN43 alloy prepared by SPS demonstrates superior mechanical and corrosion properties, making it a promising candidate for biomedical applications with customizable characteristics.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Multidisciplinary
J. M. Mendoza-Duarte, I. Estrada-Guel, C. G. Garay-Reyes, R. Perez-Bustamante, M. Romero-Romero, C. Carreno-Gallardo, R. Martinez-Sanchez
Summary: The present work examines the effects of sintering conditions on the mechanical and microstructural properties of milled aluminum powders using rapid induction heating. The results show that induction heating preserves the refined microstructure achieved through high-energy mechanical milling, resulting in higher yield strength, hardness, and densification rates compared to conventional methods. These findings suggest that induction sintering could be a viable approach for producing high-quality sintered nanocrystalline materials with improved mechanical properties in just three minutes and under a pressure of 450 MPa.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Ceramics
Xiaorong Zhang, Guangyuan Yang, Ruitong Chi, Yingjie Shi, Xu Zhao, Hai Jiang, Fei Guo, Guimei Wang, Jinxi Guo, Zhixiao Zhang
Summary: The effects of different treatment modes of precipitates in the coprecipitation method on YAG nanopowders and ceramics were investigated. The results showed that the treatment mode of water washing-ethanol immersion resulted in YAG nanopowders with optimal dispersity and ceramics with high relative density, Vickers hardness, and optical transmittance. This treatment mode was found to be superior to the other two modes.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Darush Zia Shamami, Sayed Mahmood Rabiee, Mohsen Shakeri
Summary: In this study, magnesium/hydroxyapatite (Mg/HA) functionally graded materials (FGMs) with different contents of HA were successfully fabricated using powder metallurgy and rapid microwave sintering technique. The results showed that this technique is highly effective in producing materials with high relative densities and achieving uniform microstructure and inter-layer bonding. The layered samples exhibited significantly improved mechanical properties and corrosion resistance compared to pure Mg.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
N. Xiao, Y. Z. Zeng, X. L. Lu, Y. H. Sun, B. Z. Sun
Summary: The gamma' basal platelets and W (Mg3Dy2Zn3) nanoparticles play crucial roles in precipitation strengthening of the aged Mg-2Dy-0.5Zn ternary alloy, leading to peak hardness. Furthermore, most W particles nucleate on the gamma' basal platelet and grow between adjacent platelets, significantly constraining their coarsening and final size, postponing performance degradation of the alloys.
Article
Chemistry, Physical
Lun Yang, Tao Wang, Chao Liu, Yunzhu Ma, Lei Wu, Huanyuan Yan, Xinyue Zhao, Wensheng Liu
Summary: Magnesium and its alloys are attractive materials in automotive and aerospace fields due to their low density and high strength. Powder metallurgy technology can reduce deformation and processing of magnesium alloys during preparation process. A high-performance AZ31 magnesium alloy was prepared via vacuum hot-press sintering, and the effects of sintering temperature on the alloy's structure and mechanical properties were investigated. The results showed that at an optimal sintering temperature, the alloy exhibited high strength and favorable elongation due to pressure applied during the sintering process.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Bowen Xiong, Kang Liu, Zhenjun Wang, Fang Peng
Summary: Ti-22Al-25Nb alloys were successfully fabricated by spark plasma sintering, and the phase transformation mechanisms and tensile properties were investigated. The increase in sintering temperature led to a significant increase in the volume fraction of O-phase precipitates, while the fractions of alpha(2) and B2 phases decreased. The bimodal size lamellar O-phase precipitates contributed to the excellent comprehensive mechanical property of the alloy.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Engineering, Chemical
Yake Xiao, Xianghe Peng, Tao Fu
Summary: This paper presents a novel high-entropy alloy with a heterogeneous microstructure containing multi-scale precipitates. The alloy exhibits excellent mechanical properties, surpassing those of most similar alloys prepared by powder metallurgy. It shows great promise for engineering applications.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Somnath Sinhamahapatra, Chandrima Ghosh, Himansu Sekhar Tripathi, Sunanda Mukhopadhyay
Summary: The magnesium aluminate spinel was prepared from constituent oxides through a solid-state sintering process at temperatures ranging from 1550 to 1700 degrees C in a normal air atmosphere. The addition of TiO2 and Yb2O3 improved the densification and mechanical properties of the magnesia-rich spinel, with Yb2O3 showing better performance in room temperature flexural strength.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Sweta Rani Biswal, Seshadev Sahoo
Summary: A solid-state processing method was utilized to fabricate an advanced aluminum-based hybrid composite with two-dimensional WS2 reinforcement. The structural and mechanical properties of the newly developed Al-based hybrid composites were evaluated, showing an increase in density and hardness with an increase in WS2 wt% in the matrix phase. Discussing the effect of WS2 reinforcement helped optimize the composition of the developed hybrid composite.
Article
Materials Science, Multidisciplinary
Jan Kaufman, Jan Racek, Miroslav Cieslar, Peter Minarik, Matthew A. Steiner, Seetha R. Mannava, Vijay K. Vasudevan, Anurag Sharma, Marek Bohm, Jan Brajer, Jan Pilar, Ladislav Pina, Tomas Mocek
Summary: The study found that Laser Shock Peening (LSP) and Laser Peening without protective coating (LPwC) on sensitized AA5083 resulted in LPwC samples with improved corrosion resistance and lower corrosion current, while LSP samples showed only slight improvement in intergranular corrosion rate. This is attributed to the unique recast surface layer and embedded oxygen-rich aluminum nanoparticles sub-surface layer created during laser pulse interaction when no coating was applied.
Article
Energy & Fuels
Jelena M. Djokovic, Ruzica R. Nikolic, Jan Bujnak, Branislav Hadzima, Filip Pastorek, Renata Dwornicka, Robert Ulewicz
Summary: The paper investigates the calculation of window thermal loading and selection of optimal window construction in cities of different climate regions in Serbia and Slovakia. The results show that the climate region affects the optimal window construction.
Article
Multidisciplinary Sciences
Mariia Pasichnyk, Jana Gaalova, Peter Minarik, Miroslava Vaclavikova, Inna Melnyk
Summary: This study aims to develop new polymer nanocomposite filters for the effective elimination of organic dyes such as methyl orange and methylene blue, which are non-biodegradable and not efficiently removed by traditional treatment methods. The results show that a functionalised layer can be created by specific treatment methods, increasing the surface area and creating a mesoporous structure on the polyester surface. This allows for the efficient removal of dyes and stabilization of the reduced form of methylene blue.
SCIENTIFIC REPORTS
(2022)
Article
Nanoscience & Nanotechnology
Oleksandr Boiko, Daria Drozdenko, Peter Minarik
Summary: This paper investigates the dielectric properties of (FeCoZr)(x)(Pb(ZrTi)O-3)((100-x)) granular metal-dielectric nanocomposites below the percolation threshold. Different types of polarization processes, including interfacial and dipolar polarizations, are observed. The conduction mechanism in the tested material is hopping carrier exchange between metallic phase nanograins.
Article
Materials Science, Coatings & Films
Radek Musalek, Tomas Tesar, Jonas Dudik, Jan Medricky, Jaroslav Cech, Frantisek Lukac
Summary: The cohesion of hybrid coatings was studied by conducting mechanical tests on model coatings deposited from Al2O3 powder and TiO2 suspension. The study found that the strength of the coating is influenced by the characteristics of the splats as well as the loading mode and interaction volume.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2022)
Article
Chemistry, Physical
Maria Cillikova, Anna Micietova, Robert Cep, Martina Jackova, Peter Minarik, Miroslav Neslusan, Karel Kouril
Summary: This study investigates the surface state of high tempered bearing steel 100Cr6 after turning, and finds that tool flank wear (VB) has a significant influence on white layer thickness, microhardness, and surface roughness. The mechanical and thermal load on the machined surface are analyzed to understand their combined contribution.
Article
Chemistry, Physical
Dusan Arsic, Vukic Lazic, Ruzica R. Nikolic, Norbert Sczygiol, Bozidar Krstic, Djordje Ivkovic, Branislav Hadzima, Filip Pastorek, Robert Ulewicz
Summary: This study examines the weldability of various steels, with the theoretical part explaining general concepts and evaluation methods, and the experimental part analyzing hardness measurements and microstructures of samples subjected to hard-facing, to determine the optimal filler metal and welding procedure.
Article
Materials Science, Multidisciplinary
Milan Strbak, Daniel Kajanek, Vidzaja Knap, Zuzana Florkova, Jana Pastorkova, Branislav Hadzima, Matej Goraus
Summary: This study investigates the use of plasma electrolytic oxidation (PEO) to enhance the corrosion resistance of magnesium alloy AZ91 in chloride-containing environments. The results show that the PEO coating significantly improves the corrosion resistance compared to the untreated alloy, as observed through electrochemical measurements and SEM analysis.
Article
Materials Science, Multidisciplinary
Petr Kratochvil, Robert Kral, Stanislav Danis, Josef Pesicka, Peter Minarik, Jozef Vesely
Summary: Two sets of alloys derived from FeAl iron aluminide were investigated, and their structure and properties were modified by the addition of chromium and vanadium. The B2 order of FeAl iron aluminide was retained in the modified alloys, and nanoprecipates of D0(3) structure were detected. The yield stress of the alloys increased with the increasing content of chromium and vanadium.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Stanislav Sasek, Peter Minarik, Jitka Straska, Klara Hosova, Jozef Vesely, Jiri Kubasek, Robert Kral, Tomas Krajnak, Dalibor Vojtech
Summary: Two novel ignition-resistant magnesium alloys, Mg-2Gd-2Y-1Ca and Mg-2Nd-1Y-1Ca, were prepared by ECAP and compared with four commercial alloys. The novel alloys exhibited a mean grain size of around 1μm and a dense distribution of small secondary phase particles. Mechanical testing showed that the novel alloys had significantly higher strength than the commercial alloys (except WE43), but lower ductility due to Ca segregation. The ignition temperature of the novel alloys was considerably improved (around 950°C) by the presence of Gd/Nd, Y and Ca. This study demonstrated the high strength and high ignition temperature of the novel alloys in the ultrafine-grain condition.
Article
Chemistry, Physical
Pavel Ctibor, Josef Sedlacek, Libor Straka, Frantisek Lukac, Karel Neufuss
Summary: Calcium titanate powder was compacted using spark plasma sintering, and the resulting products were studied for phase stability and dielectric characteristics. The change in sintering temperature had a significant effect on density, porosity, permittivity, loss tangent, and resistivity. The post-annealing process did not mask the effects of the sintering regime, and optical reflectance measurements were conducted to support the dielectric results. The research demonstrated the production of stable dielectric ceramics and identified suitable processing parameters for spark plasma sintering.
Article
Chemistry, Physical
Katerina Lencova, Marie Frank Netrvalova, Marek Vostrak, Frantisek Lukac, Radek Musalek, Zdenek Cesanek, Sarka Houdkova
Summary: A study compares NiCr-based coatings and uncoated steel substrates for extending the life of boilers. It is found that both Twin Wire Arc Spray (TWAS) and High velocity oxygen-fuel technology (HVOF) coating methods are effective in forming a corrosion protective layer on the surface. The TWAS technology is recommended for its cost-effectiveness and portability.
Article
Metallurgy & Metallurgical Engineering
Maria Zemkova, Peter Minarik, Jan Dittrich, Jan Bohlen, Robert Kral
Summary: This study investigated the effect of yttrium and neodymium alloying on microstructure formation during severe plastic deformation and its impact on the mechanical and corrosion properties of binary Mg-3Y and Mg-3Nd alloys. The presence of Nd primarily caused precipitation, while Y remained dissolved in the magnesium matrix. The ECAP-processed W3 sample exhibited a combination of ultrafine-grain structure, weak crystallographic texture, high strength, and high corrosion resistance.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Physical
Josef Pesicka, Petr Kratochvil, Robert Kral, Jozef Vesely, Eliska Jaca, Dalibor Preisler, Stanislav Danis, Peter Minarik, Libor Camek
Summary: The phase structure and composition of Fe3Al-based alloys alloyed with V, Cr, and Ni at different percentages were investigated. The results showed that the alloys had various phase separations and additions, depending on the alloying percentage. These findings were discussed in relation to Calphad modeling using the TCHEA5 database, and can contribute to further improvements.
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)