Article
Chemistry, Multidisciplinary
Hong-Chen Yu, Yu-Zhuo Men, Shu-Guo Yang, Hui Liu, Lei Yu, Xue-Dong Xu, Yi-Fei Li, Chang-Sheng Zou, Hao-Nan Wang, Wei-Rong Zhong
Summary: The study investigated the combined influence of Mg/Si and Ca contents on the crystallization of primary Mg2Si in Al-Mg2Si alloy. By restricting the embryo formation and growth of primary Mg2Si, the researchers successfully prepared dice-like primary Mg2Si in an over-modified alloy, revealing a novel method to control the morphology and particle size of primary Mg2Si and further understand the crystallization process.
Article
Nanoscience & Nanotechnology
Lin Zhu, Feng Qiu, Qian Zou, Xue Han, Shi-Li Shu, Hong-Yu Yang, Qi-Chuan Jiang
Summary: A new design method for manipulating the microstructure of Al-Si-Mg alloy using in situ nanosized crystals has been proposed. By analyzing the crystallographic matching relationship and misfit between different phases, the alloy achieved finer grains, refined eutectic Si and Mg2Si, leading to improved mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Saif Haider Kayani, Heon-Young Ha, Young-Hee Cho, Hyeon-Woo Son, Jung-Moo Lee
Summary: The study investigates the influence of the electrochemical nature of intermetallic particles (IMPs) and dislocation density on the localized pitting corrosion behavior of Al-Si-Mg-Cu-Mn alloy. The presence of Cu-rich Q-phase and Mn-rich α-AlFeMnSi particles causes anodic dissolution of nearby Al, resulting in localized pitting. Kelvin-probe atomic force microscopy reveals that the high potential of Q-phase and α-AlFeMnSi particles makes them cathodic, leading to micro-galvanic coupling with the surrounding Al. The increased dislocation densities in Al regions adjacent to IMPs exacerbate localized pitting, leading to stress localization and decreased overall corrosion resistance of the alloy.
Article
Materials Science, Ceramics
Yangping Chen, Wei Li, Wei Wang, Yun Zhao, Minfang Chen
Summary: A one-step hydrothermal treatment was used to deposit a nano silver-loaded magnesium-aluminum hydrotalcite coating on the surface of a Mg-Zn-Ca alloy, improving corrosion resistance and antibacterial properties. Optimizing preparation conditions resulted in smaller silver particles, reduced corrosion rate, and excellent antibacterial and biocompatibility performance.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Jian Qin, Hiromi Nagaumi, Chengbin Yu, Fangzhen Liu, Yifeng Li, Linsheng Wang
Summary: The temperature and time dependence of the radii of Mg2Si precipitates in 6082 Al alloy were investigated. The type of precipitating phase was determined using DSC and XRD. A thermodynamic model was designed to predict the evolution of particle size during the cooling process, which showed good agreement with experimental data. These findings provide guidance for optimizing the heat treatment process of alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Ziqian Liu, Ji Zhou, Lei Yang, Yonglai Lai, Yong Liu, Hualan Jin
Summary: The impact of heat treatment on the microstructure and properties of Mg-4Al-0.25Si-0.3Ca alloy was examined. The study found that after solution treatment at 420 degrees C for 10 h and 500 degrees C for 3 h, followed by aging at 220 degrees C for 7.5 h, the morphology of Mg2Si and CaMgSi phases changed from continuous to discontinuous. Additionally, Mg17Al12 phases precipitated continuously within grains and discontinuously at grain boundaries during aging. The tensile strength of the alloy increased from 174.3 +/- 4.0 MPa to 194.0 +/- 5.0 MPa, and the corrosion current density decreased by 54%. The corrosion resistance also improved, but the elongation decreased from 10.38 +/- 0.37% to 9.1 +/- 0.46%.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Metallurgy & Metallurgical Engineering
Feng Li, Xiang Sun, Liang Song, M. Bobby Kannan, Fen Zhang, Lan-yue Cui, Yu-hong Zou, Shuo-qi Li, Cheng-bao Liu, Rong-chang Zeng
Summary: The influence of intermetallic Al-Mn particles on the corrosion behavior of in-situ formed Mg-Al layered double hydroxide (Mg-Al-CO32--LDH) steam coating on AZ31 Mg alloy was investigated. The results showed that the LDH-coated alloy pretreated with CA possessed the most compact surface and the maximum coating thickness, resulting in a significant decrease in corrosion current density.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Nanoscience & Nanotechnology
Ning Fang, Chunming Zou, Zunjie Wei, Hongwei Wang, Tao Chang, Jiahan Chen
Summary: Al-7Si-3Cu-0.5Ge-0.4Mg alloy solidified under high pressure exhibited higher strength and better ductility, which could be attributed to the beneficial strengthening effects provided by Mg2Si(Ge) particles and the inhibition of crack propagation by nano-sized Al particles in eutectic Si.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Xiaoxing Li, Runqi Zhou
Summary: The microstructure, mechanical properties, corrosion, wear behavior, and cytocompatibility of in situ Zn-Mg-Mg2Si alloys with different Mg2Si contents were evaluated. Increasing Mg-10Si content improved the mechanical strength, hardness, and wear resistance, but decreased the corrosion rate and cytocompatibility. The Zn-Mg-0.6Mg2Si alloy exhibited the best matching with moderate UTS, YS, hardness, wear loss, degradation rate, and cell viability, making it a preferable candidate for biodegradable bone-implant materials.
Article
Chemistry, Physical
Mingjun Yang, Kai Li, Haonan Chen, Jicheng Wang, Zhuo Zhang, Ning Yan, Qiang Lu, Xinyue Lan, Tong Yang, Ying Zhang, Gunan Li, Shuyan Zhang, Yong Du
Summary: This study investigated the corrosion process of MgSi nano-precipitates in an Al-Mg-Si alloy using transmission electron microscopy. It was found that coarsened beta' precipitates in the over-aged state were corroded through dissolution of Mg and oxidation of Si, transforming into amorphous SiO2 precipitates. This newly discovered crystalline-to-amorphous phase transformation plays a role in intragranular corrosion behavior, explaining the reduced susceptibility of over-aged Al-Mg-Si alloys to pitting and intergranular corrosion.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Byungjoo Kim, Jihoon Hwang, Yongho Park, Youngcheol Lee
Summary: This study found that adding TiB2 particles can effectively modify the eutectic Al + Mg2Si phases in aluminum alloys, and proposed a new mechanism for TiB2 particles to promote Mg2Si phase modification.
Article
Materials Science, Multidisciplinary
Bo Wei, Shuai Pan, Guizhen Liao, Asad Ali, Shuangbao Wang
Summary: The effect of Sc addition on the hierarchical microstructures and properties of Al-Mg-Si alloys was investigated. It was found that Sc solutes exist in the Al matrix, forming a solid solution strengthening matrix. The strengthening and toughening of the alloy were associated with the formation of primary Al3Sc dispersoids. In addition, the addition of Sc led to the formation of precipitate free zones, improving the resistance to intergranular corrosion and elongation of the alloy. Sc solutes also promoted the precipitation of GP zones and solute clusters, further enhancing the precipitation hardening effect.
MATERIALS & DESIGN
(2022)
Article
Engineering, Civil
Parisa Pirhayati, Hamed Jamshidi Aval, Altino Loureiro
Summary: The research showed that the deposition rate of the silver-containing coating was lower, and the presence of silver could enhance the hardness and wear resistance of the coating, reduce the corrosion current density, and transition the wear mechanism with increasing silver content.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Chuan He, WenFeng Mo, YaYa Zheng, S. P. Feng, BingHui Luo
Summary: SECM combined with different solutions was used to investigate the localized corrosion mechanism of Al-Mg-Si alloy. The results show that large intermetallic particles are susceptible to corrosion attack, and exhibit high redox activity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Aluru Praveen Sekhar, Arijit Samaddar, Ashim Bikash Mandal, Debdulal Das
Summary: This report investigates the influence of ageing on the susceptibility to intergranular corrosion of an Al-Mg-Si alloy. It was found that the depth of corrosion increases with ageing time, and the dominant mode of corrosion gradually changes from minor pitting to uniform intergranular corrosion as ageing progresses.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Huseyin Zengin, Yunus Turen, Hayrettin Ahlatci, Yavuz Sun
Article
Materials Science, Composites
Yasin Akgul, Hayrettin Ahlatci, Muhammet E. Turan, Hamza Simsir, Mehmet A. Erden, Yavuz Sun, Ali Kilic
POLYMER COMPOSITES
(2020)
Article
Metallurgy & Metallurgical Engineering
Huseyin Koymatcik, Hayrettin Ahlatci, Yavuz Sun, Yunus Turen
METAL SCIENCE AND HEAT TREATMENT
(2020)
Article
Polymer Science
Bunyamin Cicek, Yavuz Sun, Yunus Turen, Hayrettin Ahlatci
Summary: The newPIM technology utilizes polymer binders to achieve high-pressure molding of powders, resulting in better molding effects. Experiments on metal and ceramic powders in this study indicated that spherical powders formed with specific polymer combinations yield better results.
JOURNAL OF POLYMER ENGINEERING
(2021)
Article
Materials Science, Coatings & Films
Yasin Ozgurluk, Kadir Mert Doleker, Hayrettin Ahlatci, Abdullah Cahit Karaoglanli
Summary: The study investigated the impact of high-temperature oxidation, hot corrosion, and CMAS attacks on YSZ and La2Zr2O7/YSZ TBC systems, revealing that double-layered TBCs provide better durability than traditional YSZ TBCs. Hot corrosion and CMAS attacks significantly damaged the column morphology of the EB-PVD method, reducing the performance of thermal barrier coatings.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Composites
Yavuz Sun, Engin Cevik, Yunus Turen, Hayrettin Ahlatci, Muhammet Emre Turan, Fatih Aydin, Huseyin Zengin
Summary: The study showed that adding boron carbide and graphene nanoplatelets can significantly increase the hardness, yield strength, and tensile strength of pure magnesium. Composite samples exhibited better wear resistance compared to unreinforced samples, but thermal conductivity decreased with the addition of B4C reinforcements. Additionally, the level of porosity was higher in the composite samples.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Metallurgy & Metallurgical Engineering
Galal Elmensouri, Ismail Hakki Kara, Hayrettin Ahlatci, Yunus Turen
Summary: The wear resistance of sheet magnesium alloy AZ31 with microarc oxidation coatings after shot peening is determined by studying the microstructure of the alloy and the effect of shot peening on the formation of cracks and pores, as well as the surface roughness. This study aims to predict the wear resistance of the alloy under dry friction conditions.
METAL SCIENCE AND HEAT TREATMENT
(2021)
Article
Materials Science, Multidisciplinary
Yasin Ozgurluk, Abdullah Cahit Karaoglanli, Hayrettin Ahlatci
Summary: Metal powders were cold gas dynamic sprayed on Inconel 718 nickel-based superalloy substrate materials to form thermal barrier coatings. Single and double layer ceramic layers were deposited using physical vapor deposition by electron beam. It was found that the double layer TBC system with GZO/YSZ is more resistant to CMAS damage compared to the single layer YSZ system.
Article
Materials Science, Multidisciplinary
Esra Zengin, Hayrettin Ahlatci, Huseyin Zengin
Summary: This study investigated the microstructure, tribological, and corrosion properties of carbon nanotubes (CNTs) reinforced stainless steel matrix composites. The addition of CNTs resulted in improved hardness and wear resistance, but also increased the susceptibility to pitting corrosion with higher CNT content.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Biophysics
Levent Elen, Yunus Turen, Hayrettin Ahlatci, Mehmet Unal, Deniz Ergin
Summary: This study investigated the casting, extrusion, biocorrosion, and corrosive wear properties of Mg-3 wt. % Ag alloys with 0.5 wt. % (Zn, Ca, and Nd) element additions. The results showed that the addition of Zn and Ca elements resulted in grain refinement and improved mechanical properties in the as-cast alloys. Similarly, the extrusion process also provided grain refinement and improved mechanical properties. In vitro corrosion tests revealed similar results in the as-cast alloys, while the extruded alloys showed more homogeneous corrosion properties. The corrosive wear tests demonstrated a decreasing trend in the wear rate of the extruded alloys, with the as-cast and extruded Mg-3 wt. %Ag-0.5 wt. % Ca alloys exhibiting the lowest wear rate.
Article
Chemistry, Physical
Abdulmuaen Sager, Ismail Esen, Hayrettin Ahlatci, Yunus Turen
Summary: This study investigates the microstructure, mechanical, and wear properties of extruded ZK60 matrix composites strengthened with silicon carbide (SiC) and aluminium nitride (AlN) nanoparticle reinforcements. The results show that increasing the percentage ratios of SiC and AlN in the matrix enhances the compressive strength and hardness of the composites, while reducing the friction coefficient and wear rate.
Article
Chemistry, Physical
Aboujaila A. M. Soltan, Ismail Esen, Seyit Ali Kara, Hayrettin Ahlatci
Summary: Corrosion and wear tests were conducted on NiTi alloy samples with shape memory effect. The corrosion test revealed a proportional reduction in thickness of the samples with the change in corrosion current values. Moreover, the weight loss of the samples in corrosive wear was found to be 20% less than that in dry wear.
Article
Chemistry, Physical
Hamza A. H. Abo Nama, Ismail Esen, Hayrettin Ahlatci, Volkan Karakurt
Summary: In this study, Al7075+0%Ti-, Al7075+2%Ti-, Al7075+4%Ti-, and Al7075+8%Ti-reinforced alloys were prepared and examined for their microstructure, mechanical behavior, and dry-wear behavior. The addition of Ti increased the peak hardness and wear resistance of the Al7075 alloy, attributed to the formation of oxide films, precipitation hardening, secondary hardening, grain refinement, and solid-solution-hardening mechanisms.
Article
Metallurgy & Metallurgical Engineering
A. Isikgul, H. Ahlatci, I. Esen, Y. Turen, O. Yagiz
Summary: This study investigates the mechanical properties of AC-ST H-type S275JR quality steel sections in HEA120 and HEB120 sizes. The cooling process is conducted using a specially manufactured system that sprays a coolant on the section surfaces. The results show that the cooling rate affects the microstructure and hardness of the steel, as well as the residual stresses.
ARCHIVES OF METALLURGY AND MATERIALS
(2023)
Article
Metallurgy & Metallurgical Engineering
Levent Elen, Yunus Turen, Hayrettin Ahlatci, Yavuz Sun, Mehmet Unal
Summary: This study investigated the microstructure, mechanical, corrosion, and corrosive wear properties of Mg-xAg alloys in both as-cast and extruded conditions. The results showed that increasing the amount of Ag added to the casting alloys resulted in clearer secondary phases and improved mechanical properties. Similarly, the extrusion process refined the grains and increased the mechanical properties. In vitro tests revealed poor corrosion properties for Mg-1Ag compared to other alloys, while corrosive wear tests showed a high wear rate and friction coefficient for Mg-5Ag alloys.
ARCHIVES OF METALLURGY AND MATERIALS
(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)
