Article
Materials Science, Multidisciplinary
Hannes Zschiesche, Claude Alfonso, Ahmed Charai, Dominique Mangelinck
Summary: Diffusion barriers, such as Ti interlayers, play a crucial role in controlling the kinetics of phase formation processes, as observed in the CoSi growth process. The diffusion of Co through the Ti interlayer controls the growth of CoSi, while Si diffusion through the Ti interlayer to the Co layer is also evidenced at higher annealing temperatures. Additionally, Ti diffusion to the CoSi/Si interface may affect diffusion processes and phase formation reactions.
Article
Nanoscience & Nanotechnology
R. J. Vikram, Kushagra Gupta, Satyam Suwas
Summary: This study focuses on the development of cobalt-base high entropy alloy for high temperature applications based on valence electron concentration (VEC). The newly developed HEA exhibited a two-phase microstructure with remarkable mechanical properties, showing potential for high temperature applications.
SCRIPTA MATERIALIA
(2021)
Article
Chemistry, Analytical
Aleksandra Popowich, Thomas Lam, Edward P. Vicenzi
Summary: A new standards-based SEM-EDS method was used to analyze the thin-film coating of an 18th-century French textile decorated with metal threads. The study found that the thread coating was an alloy of approximately 80% Au and 20% Ag on a nominally pure Ag substrate, matching the minimum gold standard allowed for goods around the time of manufacture. The computed gilding thicknesses vary from single digit nm to 300 nm due to surface inhomogeneities formed during production.
ANALYTICAL CHEMISTRY
(2021)
Article
Metallurgy & Metallurgical Engineering
Hai-chang Zhong, Chen-long Lin, Zi-yu Du, Chun-yan Cao, Chu Liang, Qing-rong Zheng, Le-yang Dai
Summary: LaF3 was doped to the Mg(Al) solid solution alloy to enhance hydrogen absorption and desorption. The results showed that the hydrogen storage kinetic properties were significantly improved in the Mg0.93Al0.07-5wt.%LaF3 nanocomposite, attributed to the reduction of activation energies.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Metallurgy & Metallurgical Engineering
Yun-ping Ji, Ming-xing Zhang, Yuan Hou, Tong-xin Zhao, Yi-ming Li, Hui-ping Ren
Summary: The high efficiency of Ce addition in grain refinement of delta-ferrite in a cast Fe-4 wt.%Si alloy has been verified through directional solidification experiments. It was found that Ce addition led to a transition of the solid-liquid interface from planar to cellular, with enhanced Si solute segregation in the liquid at the interface. Thermodynamic calculations suggested that Ce segregation at the interface did not significantly affect the equilibrium partition coefficient of Si.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Gui-Jia Gao, Mei-Qi Zeng, En-Liang Zhang, Rong-Chang Zeng, Lan-Yue Cui, Dao-kui Xu, Feng-Qin Wang, M. Bobby Kannan
Summary: The microstructure and chemical compositions of solid solution-treated Mg-3Nd-1Li-0.2Zn alloy were investigated, and corrosion behavior was studied under different conditions. Results showed changes in grain size and volume fraction of the second phase under different treatments, with the formation of Nd-containing oxide film and dense corrosion product layer on the alloy surface.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Yongjun Liu, Hongmei Liu
Summary: This study investigates the properties and microstructure evolution of the solid-solution process of Mg-5 wt.%Sn. The reasonable solution technology for Mg-5 wt.%Sn is found to be 12-16 hours at 480 degrees Celsius based on resistivity and microhardness analysis. The aging process reveals the presence of precipitated phases in both the grain and grain boundaries, with continuous inhomogeneous precipitation along the grain boundaries and continuous homogeneous precipitation within the grain. Analysis using TEM, HRTEM, EDAX, and XRD techniques provides further insights into the precipitates and their composition.
Article
Thermodynamics
Liyang Fang, Jun Wang, Chenran Xu, Xiancong He, Guanglong Xu, Xiaoma Tao, Yifang Ouyang, Yong Du
Summary: This study investigated the diffusion behavior and mechanical properties of the Zr-Nb-Hf system using diffusion couple technology and nanoindentation techniques. The diffusion coefficients and mechanical properties were calculated, and the wear resistance and resistance to plastic deformation of the alloys were inferred. These findings provide valuable insights into the diffusion kinetics and mechanical properties of the Zr-Nb-Hf system and offer references for the development of Zr-NbHf-based alloys with exceptional properties.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2023)
Article
Engineering, Mechanical
Yu Qin, P. Alex Greaney, T. Matthew Evans, Jamie J. Kruzic
Summary: The study investigated the influence of strain rate and plastic strain accumulation on serrated plastic flow in nickel-chromium solid solution alloy Nimonic 75. Different types of serrations were observed at different strain rates, with a critical dislocation velocity range identified across various conditions. A novel model involving solute rearrangement across dislocation cores was used to understand the quantification of critical dislocation velocity.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Geochemistry & Geophysics
Mark Pownceby, David A. McCallum, Warren J. Bruckard
Summary: A characterization study was conducted to identify the impurities, liberation degree of chromite, and possible beneficiation options of chromite ore from South Africa. The study used various techniques including bulk assays, X-ray diffraction, optical and scanning electron microscopy, and quantitative evaluation of mineral by scanning electron microscopy (QEMSCAN) and electron probe microanalysis (EPMA). The results showed that the ore contained 40.5% Cr2O3 with major impurities being Al2O3, MgO, and SiO2. The dominant mineral phase was chrome-rich spinel, and contaminant phases included siliceous minerals, plagioclase, Cr-rich diopside, and phlogopite mica. Upgrading test work demonstrated that stage crushing followed by wet gravity concentration produced a high-quality chromite product.
Article
Chemistry, Physical
Hanqing Mei, Honggun Song, Kaixuan Feng, Yang Chen, Hong Yan, Chao Luo, Dingjun Liu, Hongyu Guan, Chassagne Luc, Zhi Hu
Summary: The corrosion protection of folic acid (FA) and lauric acid (LA) modified films on WE43 magnesium alloys prepared by anodic oxidation was evaluated using various techniques. It was found that both FA and LA penetrated into the cavities and cracks of the anodic films to repair defects. The FA-modified films showed an increase in polarization resistance by 1.56 x 105 Ω cm2, while the LA-modified films exhibited the highest value (6.36 x 106 Ω cm2). Both modified films demonstrated excellent corrosion resistance compared to the substrate, and the LA-modified films were found to be hydrophobic.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Su Juan, Guo Feng, Gao Xiaobo, Feng Haiquan
Summary: Al has the largest amount of solid solution in the alloy, while Zn and Gd have relatively small amounts of solid solution. Solid-soluble Al has a repulsive effect on Zn, leading to a decrease in Zn's solid-soluble ability. Al plays a role in solid solution strengthening and second phase strengthening, while Zn plays a role in grain refinement and solid solution strengthening.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Tim M. Schwarz, Hongyi Zhan, Baptist Gault, Christopher M. Gourlay, Ingrid McCarroll
Summary: The peak-aged magnesium-aluminum-rare earth (Mg-Al-RE) alloy AE44-2, produced through high-pressure die casting, exhibits a 10% increase in yield strength due to the formation of nanoscale AlMn precipitates. Atom probe tomography reveals the presence of Ce-rich clusters in the dendritic region rather than the inter-dendritic alpha-Mg in the as cast state, indicating their formation is mainly determined by solidification kinetics rather than concentration. These Ce-rich clusters act as heterogeneous nucleation sites for the formation of Al10Mn7RE2 nanoscale precipitates during the T5 heat treatment, suggesting a potential pathway for tailoring mechanical properties.
SCRIPTA MATERIALIA
(2023)
Article
Geochemistry & Geophysics
Raphael Pietzsch, Nicholas J. Tosca, Joao Paulo Gomes, Sascha Roest-Ellis, Ana Carolina Leonel Sartorato, Sandra Nelis Tonietto
Summary: The research conducted in lacustrine carbonate rocks from the Santos Basin in Brazil revealed high phosphorus content sourced from phosphatic bioclasts and authigenic phosphate. Phosphorus was found to be associated with specific calcite textures potentially reflecting primary sedimentary conditions. This study suggests that phosphate inhibition of calcium carbonate precipitation may have played a key role in maintaining high calcium carbonate saturation and influencing distinctive carbonate growth textures.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Weihua Zhou, Yonghua Meng, Fenghui Duan, Wei Huang, Jiahao Yao, Jie Pan, Yinxiao Wang, Yi Li
Summary: The study found that the formation of the tau(3) phase (Zr50Cu29Ni2Al19 intermetallics) is triggered when the oxygen level reaches 350 ppm, with oxygen mainly concentrated in this phase. Additionally, the lattice parameter of the tau(3) phase increases with the oxygen content.
Article
Engineering, Manufacturing
Holden Hyer, Le Zhou, George Benson, Brandon McWilliams, Kyu Cho, Yongho Sohn
ADDITIVE MANUFACTURING
(2020)
Article
Materials Science, Multidisciplinary
Abhishek Mehta, Yongho Sohn
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2020)
Article
Materials Science, Multidisciplinary
Le Zhou, Holden Hyer, Saket Thapliyal, Rajiv S. Mishra, Brandon Mcwilliams, Kyu Cho, Yongho Sohn
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2020)
Article
Chemistry, Physical
Ruslan Kuliiev, Nina Orlovskaya, Holden Hyer, Yongho Sohn, Mykola Lugovy, DongGi Ha, Miladin Radovic, Elinor G. Castle, Michael John Reece, Pradeep Vallachira Warriam Sasikumar, Laura Conti, Thomas Graule, Jakob Kuebler, Gurdial Blugan
Article
Materials Science, Multidisciplinary
Le Zhou, Thinh Huynh, Sharon Park, Holden Hyer, Abhishek Mehta, Shutao Song, Yuanli Bai, Brandon McWilliams, Kyu Cho, Yongho Sohn
JOURNAL OF MATERIALS SCIENCE
(2020)
Article
Materials Science, Multidisciplinary
Abhishek Mehta, Le Zhou, Dennis D. Keiser, Yongho Sohn
JOURNAL OF NUCLEAR MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Abhishek Mehta, Yongho Sohn
Summary: Experimental measurements of chemical and tracer diffusion coefficients in Al0.25CoCrFeNi high-entropy alloy suggest that diffusion may not necessarily be sluggish, indicating a more complex diffusion behavior in high-entropy alloys than previously thought.
MATERIALS RESEARCH LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Holden Hyer, Le Zhou, Abhishek Mehta, Sharon Park, Thinh Huynh, Shutao Song, Yuanli Bai, Kyu Cho, Brandon McWilliams, Yongho Sohn
Summary: The successful manufacturing of volumetrically dense engineering components free of solidification cracks by laser powder bed fusion (LPBF) has been demonstrated for Al-Si alloys such as AlSi10Mg and Al12Si. The study found cracking susceptibility in Al-Si alloys with 1.0 and 2.0 wt.% Si, attributed to relatively large magnitudes of vertical bar dT/df(S)(1/2)vertical bar. Si segregation at the intercellular boundaries and the formation of a cellular structure were observed, allowing for estimation of the cooling rate.
Article
Materials Science, Multidisciplinary
Christine Fisher, Bruce J. Warmack, Yongchao Yu, Lydia N. Skolrood, Kai Li, Pooran C. Joshi, Tomonori Saito, Tolga Aytug
Summary: This study presents the design and scalable fabrication of a low-cost and low-power polyaniline-based ammonia gas sensor, which demonstrates good sensitivity and repeatability under low humidity conditions, making it suitable for industrial applications where low-level hazardous gas detection is essential.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Le Zhou, Holden Hyer, Jinfa Chang, Abhishek Mehta, Thinh Huynh, Yang Yang, Yongho Sohn
Summary: Alloying with Zr can mitigate solidification cracks and enhance mechanical properties and corrosion resistance of AA5083 alloys produced by LPBF technology. Moderate Zr alloying is an effective approach for designing corrosion-resistant aluminum alloys suitable for LPBF additive manufacturing technology.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Abhishek Mehta, Le Zhou, Holden Hyer, Thinh Huynh, Binghao Lu, Kevin Graydon, Erica J. Drobner, Sun Hong Park, Yongho Sohn
Summary: Cu-10Sn alloy specimens were additively manufactured by varying the LBPF processing parameters, and their effects on density, melt pool structure, and microstructure were examined. The results showed that the alloy with high cooling rates had a fine dendritic microstructure and superior mechanical properties. TEM investigation also revealed the solidification path of the LPBF fabricated Cu-10Sn alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Physics, Fluids & Plasmas
M. N. Ericson, T. E. Gebhart, L. R. Baylor, S. S. Frank, A. Nycz, G. B. Long, R. J. Warmack
Summary: A high-voltage pulsed power supply (HVPPS) has been developed for driving an eddy current actuated propellant valve in the ITER disruption mitigation system. This system allows programmable output voltage and reconfigurable energy storage capacitor bank, providing a flexible and robust platform for testing and optimizing the valve drive and system. Automated control and data collection using LabVIEW offer convenience and efficiency.
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2022)
Article
Chemistry, Analytical
Aaron J. Wilson, Bruce R. J. Warmack, Ali Riza Ekti, Yilu Liu
Summary: The accurate measurement devices are essential for the protection, control, and monitoring of the power grid, especially as renewable energy sources increase. This study investigates two commercial-grade power system distribution sensors and their ability to replicate high-frequency phenomena. It is demonstrated that these sensors exhibit characteristics in the high harmonic range that deviate from the assumption of normally distributed measurement error.
Article
Engineering, Manufacturing
Ravi Sankar Haridas, Priyanka Agrawal, Saket Thapliyal, Priyanshi Agrawal, Abhijeet Dhal, Shivakant Shukla, Le Zhou, Yongho Sohn, Rajiv S. Mishra
Summary: This study investigates the tensile and high cycle fatigue behavior of a novel Al-Ni-Ti-Zr alloy with a heterogeneous microstructure. The alloy exhibits excellent strength-ductility synergy and fatigue performance, attributed to multiple crack retardation mechanisms and favorable crack propagation pathways. Additionally, a probabilistic model is used to estimate the fatigue life of the alloy based on the stochastic microstructure.
ADDITIVE MANUFACTURING
(2023)
Article
Metallurgy & Metallurgical Engineering
Holden Hyer, Le Zhou, Sharon Park, Guilherme Gottsfritz, George Benson, Bjorn Tolentino, Brandon McWilliams, Kyu Cho, Yongho Sohn
METALLOGRAPHY MICROSTRUCTURE AND ANALYSIS
(2020)
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)