Article
Materials Science, Multidisciplinary
Felipe Amelio de Lucena, Guilherme Yuuki Koga, Rudimar Riva, Conrado Ramos Moreira Afonso
Summary: A new Fe66Co7Nb4B23 (at.%) alloy was produced and used to create laser cladding coatings. Optimization of parameters resulted in the successful production of high microhardness and dense coatings, demonstrating the potential for producing protective wear-resistant coatings on conventional steel components.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Ceramics
Yi Xiao, Huaqiang Xiao, Jinyu Feng, Bo Lin, Ying Wang
Summary: Core-shell ZrC/Ti2AlC reinforced intermetallic composite coatings were successfully prepared by laser cladding in-situ reaction method. The coatings showed good metallurgical bonding and high hardness, which are promising for application in nuclear power equipment.
CERAMICS INTERNATIONAL
(2022)
Article
Optics
Xingchen Lin, Pengfei Wang, Hongbo Zhu, Ziqi Song, Yawei Zhang, Yongqiang Ning
Summary: This paper introduces a novel defect-free processing method for laser cladding of stainless-steel ball valves, utilizing a 3-spot high-power diode laser source. The successful completion of cladding processing without any defects such as cracks and pores demonstrates the effectiveness of this method, providing a new approach for the laser cladding of stainless-steel ball valves.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Physical
Lulu Ren, He Li, Zongliang Xie, Ding Ai, Yao Zhou, Yang Liu, Siyu Zhang, Lijun Yang, Xuetong Zhao, Zongren Peng, Ruijin Liao, Qing Wang
Summary: This study describes high-energy-density polymer dielectrics filled with core-shell structured nanoparticles composed of ZrO2 core and Al2O3 shell, which exhibit high temperature operation capability and high breakdown strength. The Al2O3 shell in the composites creates deep traps, resulting in an order of magnitude lower current density and improved discharge energy density.
ADVANCED ENERGY MATERIALS
(2021)
Article
Engineering, Chemical
Ivan A. Ditenberg, Denis A. Osipov, Ivan V. Smirnov, Konstantin V. Grinyaev, Maksim A. Esikov
Summary: The study investigated the influence of the duration of preliminary high-energy ball milling on the structural-phase state and microhardness of consolidated Ni3Al samples obtained through spark plasma sintering. It was found that short-duration ball milling resulted in an inhomogeneous structural-phase state, while an increase in the milling duration led to a homogeneous phase composition, refined grain structure, and increased microhardness. The study also identified grain boundary strengthening as an effective mechanism for enhancing the material's strength.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Chemistry, Physical
Chen Cui, Meiping Wu, Xiaojin Miao, Zishuo Zhao, Yuling Gong
Summary: FeCoNiCrMo high-entropy coatings and CeO2/FeCoNiCrMo composite coatings were successfully prepared on TC4 alloy surface using laser cladding technology. The addition of CeO2 improved the corrosion resistance of the coatings by forming a stronger passive film that inhibited pitting corrosion. HEA coatings exhibited higher microhardness and improved corrosion resistance compared to TC4 alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Olga Samoilova, Nataliya Shaburova, Kirill Pashkeev, Marina Samodurova, Evgeny Trofimov
Summary: This paper investigates the microstructure, composition, and properties of an Al0.25CoCrFeNiV high entropy alloy coating deposited on austenitic-grade stainless steel by laser cladding. The study reveals changes in the microstructure and hardness of the coating after laser cladding, with a decrease in the size of vanadium precipitates and a variation in hardness across the coating thickness. However, the coating adheres tightly to the substrate without any cracks or defects, indicating the potential of laser cladding for creating high entropy alloy coatings.
Article
Materials Science, Multidisciplinary
Mingliang Wang, Yiping Lu, Guojia Zhang, Hongzhi Cui, Dingfeng Xu, Na Wei, Tingju Li
Summary: A novel Ti(C,N)-reinforced BCC-based Cr20Cu20Fe20Ni20Al20 high-entropy alloy composite coating was prepared using synchronized powder feeding plasma transferred arc cladding. The coating exhibited a core-shell structure with high strength and toughness, resulting in improved wear resistance mainly through mild abrasive wear. The microhardness and wear resistance of the composite coating were significantly higher than those of the substrate and pure HEA coating.
Article
Materials Science, Multidisciplinary
Mengzhao Li, Chao Li, Bingyuan Li, Yicheng Zhou, Long Huang, Ang Cai, Chang Cui, Senao Gao, Guodong Zhang, Bing Yang
Summary: Three kinds of Fe30Co20Cr20Ni20Mo3.5 high entropy alloy coatings were successfully prepared on the surface of a Q235 steel plate using plasma cladding and laser cladding. These coatings exhibited different microstructures, crystal structures, and properties. Among them, the deep laser cladding coating showed the highest microhardness and wear resistance, while the high-speed laser cladding coating exhibited the best corrosion resistance.
Article
Engineering, Chemical
Ivan A. Ditenberg, Denis A. Osipov, Michail A. Korchagin, Ivan Smirnov, Konstantin Grinyaev, Alexander I. Gavrilov
Summary: In this study, the changes in morphology, structural-phase state and microhardness of 3Ni-Al powder mixture after different duration of high-energy ball-milling were investigated. Three main stages of structural-phase state evolution were identified, with differences in morphology, component distribution, phase compositions, and microhardness changes observed with varying treatment durations. It was found that the synthesis of intermetallic Ni3Al and NiAl phases begins at lower temperatures than indicated in the phase diagram under high-energy ball-milling conditions. Additionally, an increase in milling duration led to a transformation of phase composition, ultimately affecting the strengthening level of the powder mixture.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Chemistry, Physical
Zhehe Yao, Jian Chen, Hongyu Qian, Yanbin Nie, Qunli Zhang, Jianhua Yao
Summary: This study investigated the application of multidimensional high-frequency vibration in laser cladding. Through experiments and numerical simulations, the effects of vibration on microstructure and mechanical properties were analyzed. The results show that multidimensional vibration can significantly improve the performance of the material.
Article
Materials Science, Multidisciplinary
Linsen Shu, Xinyu Cang, Jun Zhou, Zhao Heng, Han Wu, Wei He
Summary: The technique of laser cladding (LC) has gained attention for producing and repairing IN718 components, but their surface integrity and mechanical properties need improvement. A range of experiments were conducted to understand the material removal mechanism of LC fabricated IN718 components in dry milling. Comparative trials with wrought IN718 samples were performed to study the differences. The cutting forces of LC fabricated IN718 samples were larger than that of wrought IN718 samples, and surface plastic deformation and grain refinement were greater. Grain refinement increased microhardness in both types of IN718 components.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Coatings & Films
Shilin Zhang, Yaoning Sun, Wangjun Cheng, Yufeng Chen, Jin Gu, Gang Chen
Summary: This paper explores a new method of ceramic reinforced CoCrFeNiMo0.2 high entropy alloy composite gradient coating to strengthen face-centered cubic structured alloys. The study reveals that as the silicon carbide addition increases, the microstructure of the coatings changes, resulting in the generation of body-centered cubic phase. The second, third, and fourth layers exhibit significantly higher hardness, attributed to the presence of body-centered cubic structure, carbide, and grain boundary strengthening effects. The wear mechanism changes from adhesive wear to abrasive wear as the number of layers increases, leading to reduced wear rates.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Lawrence Yee Foong Ng, Hidayah Ariffin, Tengku Arisyah Tengku Yasim-Anuar, Mohammed Abdillah Ahmad Farid, Mohd Ali Hassan
Summary: This study aimed to improve the productivity of nanobiochar (NBC) through high-energy ball milling, finding that using grinding media with different sizes of steel balls was more effective. Results showed that 30 minutes of ball milling could produce NBC particles around 95 nm, while 60 minutes were sufficient to produce 75 nm NBC particles with high thermal stability.
Article
Chemistry, Physical
Dong Liang, Ling Yan, Kunkun Huang, Yan Li, Fangfang Ai, Hongmei Zhang, Zhengyi Jiang
Summary: The study found that the wet milling rotating speed affects the number of graphene layers, with an increase in rotational speed leading to a gradual increase in the quantity of few-layer graphene nanometer sheets. Within a specific range, the conversion efficiency of graphene also increases as the rotational speed rises.
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)