Article
Materials Science, Multidisciplinary
Abdalrhaman Koko, Thorsten H. Becker, Elsiddig Elmukashfi, Nicola M. Pugno, Angus J. Wilkinson, James Marrow
Summary: Understanding the local fracture resistance of microstructural features is crucial for the microstructure-informed design of materials. This study presents a novel approach to evaluate stress intensity factors directly from experimental measurements, using high-resolution electron backscatter diffraction. An exemplar study is conducted on a quasi-static crack propagating on low index {hkl} planes in a (001) single crystal silicon wafer.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Nanoscience & Nanotechnology
Xianfeng Ma, Hailin Zhai, Ligang Song, Wenjie Zhang, Yanying Hu, Qiang Zhang
Summary: This study investigated the relationship between grain microstructure, plastic deformation, and mechanical properties of Al0.3CoCrFeNi high-entropy alloys. It was found that the sample with smaller grains exhibited more significant grain boundary deformation and a more uniform distribution of dislocation density. Crystal plasticity finite element modeling and analysis revealed the stress and strain heterogeneities during tensile deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Metallurgy & Metallurgical Engineering
Naoya Ihara, Takashi Iwamoto, Kimihiro Nishimura
Summary: The crack propagation behavior of nitrocarburized JIS SCM420 steel was studied in a rotational bending fatigue test, with a focus on crack stagnation behavior. It was found that the crack clearly stagnated at the fatigue limit of 400 MPa and the stagnated position corresponded to the critical depth between the hardened and unhardened regions formed by nitrocarburizing. The crack stagnation can be explained by the plastic-induced closure mechanism.
ISIJ INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Chaoping Jiang, Hongchuan Ma, Yongnan Chen, Nan Wang, Qinyang Zhao, Gang Wu, Lixia Zhu, Jinheng Luo, Yongqing Zhao
Summary: This study investigates the crack propagation behavior and mechanism of dual-phase steel under low temperature conditions. The results show that the strength of dual-phase steel increases while the fracture toughness decreases at low temperatures. The reduction in plastic zone size at the crack-tip causes extreme sensitivity to ambient temperature. Additionally, the fracture of dual-phase steel presents transgranular fracture along specific crystal planes due to the accumulation of dislocation density.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Materials Science, Multidisciplinary
Neelam Meena, D. S. Gowtam, Vivek Srivastava, S. Satheesh Kumar, A. G. Rao, N. Prabhu
Summary: The elastic-plastic fracture toughness of a carbon-containing high entropy alloy was evaluated using the CTOD method. The alloy, processed on a large semi-industrial scale, has a microstructure consisting of an FCC matrix and HCP laminates. Additionally, Cr-rich carbide particles were found distributed in the matrix. The alloy containing carbon exhibited a 47% higher elastic-plastic fracture toughness (301 MPa√m) compared to the carbon-free Fe50Mn30Co10Cr10 alloy. The associated deformation mechanisms explaining this improvement have been discussed.
Article
Engineering, Mechanical
Hailin Zhai, Wenjie Zhang, Jishen Jiang, Xianfeng Ma, Huanyue Lin, Changquan Xiao, Shuai Wang, Wenjia Qiu, Jingyu Zhong
Summary: The effects of microstructure on fatigue short crack propagation behavior of Al0.3CoCrFeNi high entropy alloys (HEAs) were investigated using in-situ fatigue testing under scanning electron microscope (SEM). The experimental results showed that specimens with fine grain (FG) had better fatigue crack propagation resistance and longer fatigue life compared to specimens with coarse grain (CG). The fatigue short crack propagation followed a transgranular mode associated with octahedral slip. The fatigue small crack growth was mainly microstructurally sensitive, exhibiting noticeable fluctuations related to the blocking effects of grain boundaries and twin boundaries. Furthermore, a modified fatigue crack growth model was proposed, which could effectively evaluate the crack growth rates of HEAs with different grain microstructures under different fatigue stresses.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Susheel Dharmadhikari, Eric Keller, Asok Ray, Amrita Basak
Summary: This paper presents a dual-imaging methodology to investigate fatigue crack initiation & propagation along the lateral and transverse directions in Al7075 flat specimens. The confocal microscope detects short crack initiation at a lengthscale of 3 μm, while the digital microscope measures cracks at a scale of 0.5 mm. The apparatus provides a unique advantage of characterizing multi-scale fatigue crack evolution without significant restrictions on specimen size and loading or frequency.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Materials Science, Multidisciplinary
Zhu Wang, Jie Jin, Guo-Hui Zhang, Xue-Hua Fan, Lei Zhang
Summary: The study found that the content of Fe and Mo species in the passive film of high-entropy alloy decreases with increasing temperature, leading to the degradation of the passive film. High-entropy alloy exhibits different corrosion behaviors at different temperatures, with selective dissolution of crystal phases occurring below 50 degrees Celsius and pitting corrosion occurring above 60 degrees Celsius.
Article
Engineering, Mechanical
Qinan Han, Wei Wang, Jianwen Fang, Haitao Cui, Hongjian Zhang, Xiaolin Yang, Qinqin Mu, Jian Xu, Huiji Shi
Summary: This work conducted in-situ scanning electron microscope (SEM) fretting fatigue experiments using dovetail shape specimens to study the failure of the turbine blade-disc dovetail joint in aero-engines. The study captured the fretting fatigue damage process and quantified the misorientation and geometrically necessary dislocation (GND) density induced by fretting fatigue.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Engineering, Mechanical
Aleksandra Krolicka, Grzegorz Lesiuk, Krzysztof Radwanski, Roman Kuziak, Aleksandra Janik, Rafal Mech, Tomasz Zygmunt
Summary: The research shows that the bainitic and pearlitic rails do not exhibit significant differences in fatigue performance. Both materials have similar fatigue crack growth rates and fracture mechanisms, with differences observed in the type of fracture in the final fracture region. Further studies should consider other functional properties such as abrasive wear resistance and rolling contact fatigue when comparing the two materials.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Mechanical
Hailin Zhai, Jishen Jiang, Wenjie Zhang, Qiang Zhang, Xianfeng Ma, Shuai Wang, Zhaolong Li, Wenjia Qiu, Changquan Xiao, Huanyue Lin
Summary: This study reveals the relationship between grain slip deformation and fatigue crack initiation of Al0.3CoCrFeNi high entropy alloy through in-situ fatigue tests under SEM. The results show that fine grains have a higher fatigue crack initiation life compared to coarse grains, which can be attributed to the inhibitory effects of twins and grain boundaries on crack initiation. Fatigue cracks initiate in areas with a high density of slip lines, and may deviate from a single slip line due to the activation of multiple slip systems inside the grains.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Nanoscience & Nanotechnology
Rama Srinivas Varanasi, Motomichi Koyama, Yuki Shibayama, Eiji Akiyama
Summary: The present work investigates the fracture mechanisms in a dual-phase steel and reveals the dominant brittle fracture contrary to conventional wisdom. The crack initiation occurs via martensite cracking along the prior austenite grain boundaries, while the crack propagation in ferrite primarily occurs via brittle cleavage cracking. The study also clarifies the micro mechanisms associated with the sharp and blunt martensite cracks and occasional ductile ferrite fracture.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Metallurgy & Metallurgical Engineering
Anders Holmberg, Urban Wiklund, Per Isaksson, Asa Kassman Rudolphi
Summary: This study investigates the crack propagation route in the case hardened region of different PM steels manufactured with different powder size distributions and sintered at different temperatures. EBSD is used to study the microstructure before and after case hardening, revealing the relationship between powder particle grains and prior austenite grains. The crack propagation behavior in case hardened sintered steel is found to follow the prior grain/prior austenite boundaries.
Article
Nanoscience & Nanotechnology
Siyu Lu, Shenglu Lu, Biao Chen, Ma Qian, Qiuming Wei, Katsuyoshi Kondoh, Jianghua Shen
Summary: In this study, in-situ high temperature electron back-scatter diffraction (HT-EBSD) was used to investigate the phase transformation in Grade 1 commercially pure titanium (CP Ti). The results showed that the transformation from alpha-Ti to beta-Ti followed the Burgers orientation relationship (BOR), while the transformation from beta-Ti to alpha-Ti during continuous cooling led to the formation of Type 2 alpha-variants that defied the BOR. This phenomenon, not reported before for CP Ti, was attributed to the fast cooling process and the lattice mismatch between the two phases.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Yong-Gang Tong, Nan Tian, Hong-Feng Huang, Zhi-Bin Zhang, Xiu-Bing Liang, Xi-Xi Ji, Jing-Zhong Fang, Yong-Le Hu
Summary: Dual-phase high-entropy alloys exhibit a combination of high strength and high ductility. The deformation mechanisms in these alloys involve phase transformation and interactions between grain boundaries and dislocations. Molecular dynamics simulations and experiments were used to investigate the deformation mechanism of Al0.5CoCrNiFe high-entropy alloy, revealing phase transformation and dislocation slip as the main deformation mechanisms. Significant dislocation pile-up was observed at the interface between face-centered cubic (fcc) and body-centered cubic (bcc) phases. The mechanical properties and deformation behavior of high-entropy alloys were found to be significantly influenced by temperature and strain rate.
Article
Materials Science, Multidisciplinary
Keivan A. Kasvayee, Ehsan Ghassemali, Kent Salomonsson, Surendra Sujakhu, Sylvie Castagne, Anders E. W. Jarfors
MATERIALS CHARACTERIZATION
(2018)
Article
Nanoscience & Nanotechnology
Anton Bjurenstedt, Ehsan Ghassemali, Salem Seifeddine, Arne K. Dahle
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Nanoscience & Nanotechnology
Ehsan Ghassemali, Juan Carlos Hernando, Doru M. Stefanescu, Attila Dioszegi, Anders E. W. Jarfors, Jiri Dluhos, Martin Petrenec
SCRIPTA MATERIALIA
(2019)
Article
Nanoscience & Nanotechnology
Juan Carlos Hernando, Jessica Elfsberg, Ehsan Ghassemali, Arne K. Dahle, Attila Dioszegi
SCRIPTA MATERIALIA
(2019)
Article
Metallurgy & Metallurgical Engineering
Juan Carlos Hernando, Ehsan Ghassemali, Arne K. Dahle, Attila Dioszegi, Jessica Elfsberg
INTERNATIONAL JOURNAL OF METALCASTING
(2020)
Article
Materials Science, Multidisciplinary
Suhas Sreekanth, Ehsan Ghassemali, Kjell Hurtig, Shrikant Joshi, Joel Andersson
Article
Materials Science, Multidisciplinary
Mohammadreza Zamani, Ilia Belov, Emma Sjolander, Anton Bjurenstedt, Ehsan Ghassemali, Salem Seifeddine
Article
Materials Science, Multidisciplinary
Yousef Mazaheri, Amir Hossein Jahanara, Mohsen Sheikhi, Ehsan Ghassemali
Article
Materials Science, Multidisciplinary
H. Khorshidi, A. Kermanpur, H. Rastegari, E. Ghassemali, M. C. Somani
Summary: The hot deformation characteristics of a FeCrMnN austenitic stainless steel with 0.28 wt.% nitrogen were investigated through hot compression tests, revealing dynamic recrystallization at high temperatures and regions of unstable flow at low temperatures and high strain rates.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Patrick L. J. Conway, T. P. C. Klaver, Jacob Steggo, Ehsan Ghassemali
Summary: By conducting high-throughput screening in the Co-Cr-Fe-Mn-Ni system, 'islands' of single phase FCC structure were identified, reducing the material cost compared to the equiatomic alloy. Experimental investigation of the alloy revealed lower strength but excellent thermal strength, with softening behavior attributed to solid solution hardening. Proposed modified models for stacking fault energy and solid solution hardening could be utilized in high-throughput screening algorithms for accelerated alloy design with specific mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Gianluca Di Egidio, Carla Martini, Johan Borjesson, Ehsan Ghassemali, Lorella Ceschini, Alessandro Morri
Summary: There is a lack of systematic studies on the correlation between alloy microstructure and mechanical failure for the AlSi10Mg alloy produced by laser-based powder bed fusion (L-PBF). This study investigates the fracture mechanisms of the alloy in different conditions and after various heat treatments. In-situ tensile tests combined with electron backscattering diffraction were conducted to analyze the crack nucleation and growth. The results showed that the T6 heat treatment formed a discrete globular Si morphology, which improved the mechanical performance due to the more homogeneous distribution of finer Si particles.
Article
Green & Sustainable Science & Technology
Toni Bogdanoff, Murat Tiryakioglu, Tomas Liljenfors, Anders E. W. Jarfors, Salem Seifeddine, Ehsan Ghassemali
Summary: The effect of rotary degassing on defect formation, mechanical properties, and energy consumption in the casting furnace of aluminium alloy EN AC 46000 was investigated. Negligible degradation in mechanical properties of the final cast component was observed after removing the rotary degassing step. Eliminating rotary degassing led to a significant reduction in temperature drop in the melt, resulting in up to 75% energy savings in the casting furnace. The reduced energy consumption translated to a decrease of up to 124,000 kWh and CO2 emission reduction of about 1500 kg in a 1500 kg annual production in an electrical casting furnace.
Article
Nanoscience & Nanotechnology
Toni Bogdanoff, Murat Tiryakioglu, Anders E. W. Jarfors, Salem Seifeddine, Ehsan Ghassemali
Summary: This study investigates the effects of surface quality and pore size, resulting from different levels of hydrogen content in liquid metal, on the fatigue behavior of an Al-7%Si-3%Cu-Mg casting alloy. The results reveal that surface roughness and hydrogen content independently influence fatigue strength. Surprisingly, the fatigue strength of machined and polished samples, which conform to standard testing practices, is significantly reduced compared to other conditions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Ali Ghatei-Kalashami, Ehsan Ghassemali, Christopher DiGiovanni, Frank Goodwin, Norman Y. Zhou
Summary: This study found that fully ferritic structures are susceptible to liquid-metal-embrittlement (LME) phenomenon, contrary to previous beliefs that the presence of austenite is a prerequisite. Elemental distribution analysis showed that liquid Zn was not present, indicating that solid-state grain boundary diffusion may be involved in LME-cracking. The occurrence of grain dropout and Zn-containing cracks in grain boundaries without branching to other cracks suggested that grain boundary sensitization plays a role in LME-cracking.
Article
Materials Science, Multidisciplinary
Toni Bogdanoff, Lucia Lattanzi, Mattia Merlin, Ehsan Ghassemali, Salem Seifeddine
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)