Article
Materials Science, Multidisciplinary
Qinyu He, Chengyi Zhu, Yulong Liu, Wen Yan, Xiangliang Wan, Guangqiang Li
Summary: The microstructure, texture, mechanical properties, and magnetic properties of low carbon and silicon non-oriented electrical steels annealed at different temperatures were investigated. The results showed the presence of various precipitates, including fine precipitates and composite precipitates, in the samples annealed at higher temperatures. The magnetic properties of the experimental samples were found to be superior to commercially available steels of the same grade.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Guofeng Zhang, Suotao Wang, Shuguang Liu, Yuxing Guo, Shunxing Liang, Shuzhi Zhang, Xinyu Zhang, Junsong Zhang, Riping Liu
Summary: The microstructure and tensile properties of a newly designed Fe-27Mn-10Al-1.4C-0.1V-0.1Nb lightweight steel were investigated. The steel exhibited non-recrystallized austenite grains, recrystallized grains, and nano-sized (V,Nb)C particles and kappa-carbides after annealing. It achieved high tensile strength and excellent ductility. The pinning effect of (V,Nb)C particles and the refinement of slip bands improved the material's work hardening rate. Microband refinement dominated the deformation microstructure at later stages.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Metallurgy & Metallurgical Engineering
Chen Wang, Li-nan Ma, Xiao-guang Ma, Tao Wang, Zheng-yi Jiang, Mahadi Hasan, Jing-wei Zhao
Summary: The effect of annealing temperature on the microstructure and tensile properties of copper/aluminum (Cu/Al) composite thin strips was investigated through various techniques. Recrystallization of the Cu/Al matrix, growth of the aluminum matrix grains, and formation of a diffusion layer were observed during the annealing process. The annealing treatment reduced the tensile strength but improved the overall plasticity of the material, with the diffusion layer playing a significant role in transmitting tensile stress.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Materials Science, Multidisciplinary
Chaoyue Chen, Yingchun Xie, Shuo Yin, Wenya Li, Xiaotao Luo, Xinliang Xie, Ruixin Zhao, Chunming Deng, Jiang Wang, Hanlin Liao, Min Liu, Zhongming Ren
Summary: This work successfully prepared pure Cu with excellent strength and ductility using cold spray additive manufacturing (CSAM) technology, and revealed the microstructure evolution, strengthening, and ductilization mechanisms. The results showed that CSAM Cu possesses a unique heterogeneous microstructure and can achieve synergistic strengthening and ductilization by controlling grain refinement and dislocation density. This work provides potential for the application of CSAM technology in manufacturing metallic parts.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Coatings & Films
Jagannadh V. S. N. Sripada, Dulal Chandra Saha, Gobinda C. Saha, Hamid Jahed
Summary: This study aimed to synthesize a novel Al6061-ND metal matrix composite (MMC) particle feedstock through high-energy mechanical alloying (HE-MA) method for potential lightweighting applications. The optimized design parameters were composite batch design, milling time, and ball diameter. The addition of 1 wt% nanodiamond (ND) in the MMC composite produced superior particle size distribution (PSD) within a specific milling time. The Al6061-1wt.%ND MMC showed promise as feedstock for cold spray additive manufacturing of lightweight components.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Manash Bhuyan, Anil Borah
Summary: The microstructural, mechanical, and wear properties of Al-4.28 Cu-1.60 Mg alloy micro-alloyed with titanium (Ti) at different concentrations (0.02, 0.04, and 0.08 wt.%) were investigated. SEM and EDS analyses revealed the presence of two major phases, CuAl2 and Fe-rich (Al-Cu-Mg-Si-Fe-Mn) phase, in the as-cast base alloys. Addition of Ti resulted in increased hardness and tensile strength after aging. The improvement in tensile strength and elongation was higher for rolled alloys compared to cast alloys under peak aged condition, especially for 0.08 wt.% Ti. Wear study showed that Ti addition decreased the wear rate.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Sergey Grigoriev, Eugeniy Gershman, Iosif Gershman, Alexander Mironov, Pavel Podrabinnik
Summary: The microstructure and formation mechanisms of a coating obtained by cold gas-dynamic spraying were investigated, with pre-processing of the substrate surface shown to improve adhesion strength.
Article
Materials Science, Multidisciplinary
Vladislav S. Shikalov, Tomila M. Vidyuk, Artem A. Filippov, Ivanna D. Kuchumova
Summary: This paper presents the investigation results of copper-tungsten coatings with different compositions on aluminum alloy substrates. It was found that increasing tungsten content in the coatings improves their microhardness and Young's modulus, as well as bonding strength. Cu-W coatings show better wear resistance compared to pure copper coatings under dry sliding wear conditions.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Dong Wu, Yaxin Xu, Wenya Li, Ningsong Fan, Yang Yang, Shuo Yin
Summary: In this study, an equimolar FeCoNiCrMn high-entropy alloy (HEA) was fabricated using solid-state cold spray additive manufacturing (CSAM) technique and post-annealing. The microstructure evolution and mechanical properties were evaluated. Tensile test results showed that the deposited sample annealed at 1000 degrees C for 2 h exhibited improved tensile strength and ductility compared to the as-sprayed sample. The combination of CSAM and post-annealing strategy achieved a strength-ductility synergy in HEA deposits.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Ningsong Fan, Aran Rafferty, Rocco Lupoi, Wenya Li, Yingchun Xie, Shuo Yin
Summary: In this study, equiatomic CoCrFeNi high-entropy alloy was manufactured using solid-state cold spray additive manufacturing technology and then post-spray annealed at temperatures ranging from 500 to 1000 degrees C. Different types of deposits were obtained by adjusting the annealing temperature, and their microstructure and mechanical properties were examined. The as-sprayed deposit showed high compressive yield strength but fractured in the tensile test, indicating tension-compression asymmetry. Recrystallization annealing improved the deposit density and reduced interparticle interfaces, leading to enhanced compressive strength and ductility. Fully recrystallized deposit exhibited weakened tension-compression asymmetry and the best recovery of tensile ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Lucas B. Otani, Lars Schonemann, Bernhard Karpuschewski, Christian Baron, Hauke Springer, Claudemiro Bolfarini, Volker Uhlenwinkel
Summary: A high modulus steel was successfully produced using the powder-based cold spray additive manufacturing technique, which showed potential for lightweight design. The results demonstrated lower oxidation levels and higher deposition rates compared to laser additive manufacturing techniques, but imperfect particle bonding and relatively high oxygen content need further improvement.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
O. J. Akinribide, S. O. O. Olusunle, S. O. Akinwamide, B. J. Babalola, P. A. Olubambi
Summary: The impact of heat treatment process on microstructural, mechanical and tribological performance of unalloyed and alloyed ductile iron was investigated in this study. The results showed that heat treatment can improve the mechanical and frictional properties of the materials, while producing some ferrite and martensitic structures in the microstructure.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Review
Materials Science, Multidisciplinary
Pedro Poza, Miguel Angel Garrido-Maneiro
Summary: Cold spray (CS) is a solid-state processing technique for depositing coatings on bulk materials to improve functionality and extend service life. Coatings generated via CS exhibit similar properties to bulk materials.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Materials Science, Coatings & Films
Hongjian Wu, Chunjie Huang, Xinliang Xie, Shaowu Liu, Tao Wu, Thomas Niendorf, Yingchun Xie, Chunming Deng, Min Liu, Hanlin Liao, Sihao Deng
Summary: This article introduces four typical spray trajectories used in industrial robots during cold spray process and their effects on Cu deposits. The study found that spray trajectories have a significant impact on thermal history and residual stress distribution, but no significant differences were found in microstructures and mechanical properties. The Cu coating presented anisotropic characteristics that influenced performances in different directions, and post-heat treatment improved mechanical performances to some extent.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Adrian Chua, Chanman Park, Troy Y. Ansell, Andy Nieto
Summary: This study investigates the mechanical behavior of Cu-38Ni coatings cold sprayed onto Cu-10Ni substrates and the effects of annealing. It reveals that annealing enhances the ductility, strength, and adhesion strength of the coating, reduces pores and cracks, and increases plasticity due to recrystallization. Nanoindentation shows that the as-sprayed material is the hardest but the most brittle.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Y. Cao, X. Lin, Q. Z. Wang, S. Q. Shi, L. Ma, N. Kang, W. D. Huang
Summary: This study investigated the microstructure and tensile properties of selective laser melted AlSi10Mg at elevated temperature, revealing a significant decrease in tensile strength and increase in elongation when the holding temperature reaches 400 degrees Celsius.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Shun Lv, Jinshan Li, Shufeng Li, Nan Kang, Biao Chen
Summary: The reinforcing effect of short carbon fibers (CFs) in Ti-6Al-4V (TC4) matrix composites was investigated through mechanical testing and microstructure analysis. It was found that CFs/TC4 composites exhibit ductile fracture at elevated temperatures, and the reinforcing effect of CFs becomes more prominent with increasing temperature.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Zehao Qin, Nan Kang, Fengying Zhang, Zihong Wang, Qian Wang, Jing Chen, Xin Lin, Weidong Huang
Summary: This study investigates the high cycle fatigue properties of an Al-Mg-Sc-Zr alloy manufactured via SLM with optimized parameters, finding periodic, inhomogeneous microstructure causing reduced fatigue life. X-ray CT results show random distribution of mainly porosity defects initiating fatigue crack. Annealed samples exhibit good fatigue strength close to high-strength 7075Al. A fatigue crack propagation mode related to defect microstructure characteristics is established for predicting fatigue properties.
INTERNATIONAL JOURNAL OF FRACTURE
(2022)
Article
Metallurgy & Metallurgical Engineering
Haoxiang Wang, Xin Lin, Nan Kang, Zehao Qin, Shuoqing Shi, Jiacong Li, Weidong Huang
Summary: Hybrid manufacturing combines additive manufacturing techniques with traditional processing methods to create complex structures on regular components. This study used selective laser melting to produce a bimetal material on a deformed Al6061 alloy substrate, and investigated the interface characteristics and mechanical properties of the hybrid manufactured samples.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2022)
Article
Engineering, Manufacturing
Yinghui Zhou, Xin Lin, Nan Kang, Yao Tang, Weidong Huang, Zhennan Wang
Summary: The study obtained a heterogeneous band structure of a 2219 Al alloy using wire + arc additive manufacturing. The water-cooled deposit exhibited higher volume fraction of columnar grains and better mechanical properties, compared to the air-cooled deposit. The different deformation patterns and dislocation coordination of the columnar and equiaxed grains explained the differences in mechanical properties.
ADDITIVE MANUFACTURING
(2022)
Article
Engineering, Manufacturing
Zehao Qin, Nan Kang, Mohamed El Mansori, Zihong Wang, Haoxiang Wang, Xin Lin, Jing Chen, Weidong Huang
Summary: This study investigates the defects, microstructure, and fatigue properties of Sc and Zr-modified Al-Mg alloy fabricated by laser powder bed fusion (LPBF) in different building directions. The research finds that transversely deposited (TD) samples exhibit higher fatigue strength due to the defects and microstructure. The lack of fusion leads to higher stress concentration in the parallelly deposited (PD) samples, while the indistinctive crack deflection and possible cyclic softening of columnar grains result in decreased fatigue resistance.
ADDITIVE MANUFACTURING
(2022)
Article
Engineering, Industrial
Jinglin Lu, Xin Lin, Nan Kang, Yang Cao, Qingzheng Wang, Jiacong Li, Lingyu Zhang, Weidong Huang
Summary: The microstructure and mechanical properties of Al-Mn-Sc alloys fabricated by selective laser melting were studied. It was found that the precipitation sequence and Sc/Mn ratio were critical for controlling the grain and precipitate characteristics. The pre-precipitated Mn-bearing particles inhibited the formation of Al3Sc, resulting in a columnar grain structure, while the preferentially precipitated Al3Sc induced a bimodal grain structure and led to cracking in regions with mismatched deformation capacity.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Yanfang Wang, Xin Lin, Nan Kang, Zihong Wang, Yuxi Liu, Weidong Huang
Summary: A direct aging regime was proposed to maintain the grain-boundary strengthening and precipitation strengthening in modified conventional wrought aluminum alloys, resulting in a higher yield strength compared to the normal T6 heat treatment. The direct aging treatment preserved the ultrafine grains and precipitated spherical L1(2)-Al3Zr particles, while the solution treatment and aging led to grain coarsening and the presence of coarsening L1(2)-Al3Zr particles, nano-sized S' phases, and GPB zones. Both the direct aging and solution treatment and aging samples exhibited higher strength than other SLMed Al-Cu-Mg series alloys, comparable to the wrought AA2024-T6 alloy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Yanfang Wang, Xin Lin, Nan Kang, Zihong Wang, Qingzheng Wang, Yuxi Liu, Weidong Huang
Summary: In this study, Zr-modified 2024Al alloy deposits were prepared using L-PBF technology, with the addition of 1.3wt% Zr, which reduced the solidification cracking susceptibility and improved the grain structure of the alloy. After T6 heat treatment, the yield strength and ultimate tensile strength of the alloy were further increased, reaching comparable or even higher levels than conventional wrought alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Q. Z. Wang, X. Lin, N. Kang, X. L. Wen, Y. Cao, J. L. Lu, D. J. Peng, J. Bai, Y. X. Zhou, M. El Mansori, W. D. Huang
Summary: Understanding the effect of reinforcements on microstructure evolution and strengthening mechanism is crucial for developing good performance aluminum matrix composites (AMCs) prepared by laser additive manufacturing (LAM). In this study, the roles of submicron-TiB2 particles in the grain morphology evolution, mechanical properties, and corresponding strengthening mechanism of the 2024Al matrix processed by laser directed energy deposition (L-DED) and laser powder bed fusion (L-PBF) were compared. The results show that the L-DED processed TiB2p/2024Al composite has equiaxed grains, while the L-PBF processed composite only shows refinement in columnar grains. Both L-DED and L-PBF fabricated 3 wt% TiB2p/2024Al composites exhibit enhanced strength and plasticity due to grain refinement. Grain boundary strengthening, dislocation strengthening, and load transfer strengthening contribute to the increased yield strength in L-DEDed TiB2p/2024Al sample.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Bo Yao, Xufei Lu, Liang Ma, Nan Kang, Shang Sui, Hua Tan, Jing Chen
Summary: In laser blown powder directed energy deposition (DED), the self-regulation effect (SRE) is a unique phenomenon that compensates for the sloping deposition surface induced by process fluctuations or part warpage. Previous numerical studies on DED have overlooked the variable layer thickness and the credibility of simulations. In this study, an improved modeling process considering SRE is proposed, and experimental measurements are used to quantify the relationship between layer thickness and powder standoff distance (PSD) and inter-layer temperature (ILT). Two thermo-mechanical finite element (FE) models are established to examine the proposed modeling strategy, and the results demonstrate that the model with SRE significantly improves the mechanical and geometric predictions of DED parts.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Automation & Control Systems
Qingzheng Wang, Xin Lin, Mohamed El Mansori, Yang Cao, Nan Kang, Weidong Huang
Summary: This work investigated the heat-induced microstructure evolution and mechanical properties of the TiB2p/2024Al composite prepared by SLM. The as-deposited composite exhibited a gradient microstructure and mechanical properties, but this gradient could be eliminated and the mechanical properties could be improved through solid solution and aging heat treatment.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Wendi Shi, Yahui Yang, Nan Kang, Minjie Wang, Biao Chen, Yulong Li, Umeda Junko, Katsuyoshi Kondoh, Jianghua Shen
Summary: This study adopted the selective laser melting (SLM) additive manufacturing method to produce high oxygen-doped commercial purity titanium (Ti-O). The results showed that the TiO2 powders decomposed under the SLM process and the oxygen atoms were presented as solid solutes. The strength of SLM Ti-O drastically increased regardless of loading rate, while pure Ti and Ti-O alloy exhibited distinct strain rate sensitivity. The difference between these SLM samples was found to closely relate with their microstructures.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Xiaoli Wen, Bin Chen, Zhao Chen, Xin Lin, Haiou Yang, Nan Kang, Qingzheng Wang, Weili Wang, Weidong Huang
Summary: The microstructural evolution and mechanical properties of 3 wt% TiB2p reinforced 2024Al composite after T6 heat treatment were investigated. It was found that the T6 heat treatment led to the formation of ultrafine Al2CuMg precipitates and a small amount of AlCuMnFe (T) dispersoids. Quantitative analysis revealed that grain refinement and Orowan strengthening contributed to the high strength of the annealed TiB2p/2024Al composite.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Zehao Qin, Nan Kang, Huajing Zong, Chunhui Zhan, Yanbo Fang, Zihong Wang, Mohamed El Mansori, Jing Chen, Xin Lin, Weidong Huang
Summary: This study applies hot isostatic pressing (HIP) to enhance the fatigue properties of L-PBFed alloys by healing porosities and promoting oxidation, highlighting the critical role of oxides in fatigue performance.
MATERIALS RESEARCH LETTERS
(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)