Article
Chemistry, Physical
Hainan Wang, Yanhai Cheng, Ruwei Geng, Bo Wang, Yongxiong Chen, Xiubing Liang
Summary: High-speed laser cladding (HLC) technology reduces heat input to the substrate surface by changing the convergence point of the laser beam and powder stream. HLC coatings have faster cooling rates compared to conventional laser cladding (CLC), resulting in coatings with low dilution and high amorphous content. A study comparing Fe-based amorphous coatings deposited on AISI 1020 seamless steel tubes using CLC and HLC processes found that the HLC coating had a more uniform distribution of amorphous phases, smaller and denser microstructure, and better corrosion resistance than the CLC coating. The mechanical properties and corrosion resistance of the coatings improved with increasing amorphous phase content.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Chunyan Li, Jianshu Zhai, Lin Tian, Yu Lu, Xiaocheng Li, Shengzhong Kou
Summary: The Fe-Cr-Mo-B-C coating was prepared on 45 steel using laser cladding. The effects of different process parameters on the properties of the coatings were analyzed. The increase of laser power or overlap rate resulted in more serious crystallization, porosity, and even cracks, reducing the overall properties of the coatings. The microhardness of the coatings was determined by the amorphous phase and hard phases B6Fe23 and Cr2B. The optimal conditions for laser cladding were identified as a power of 1400 W with an overlap rate of 30%.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Hao-zheng Wang, Yan-hai Cheng, Jin-yong Yang, Xiu-bing Liang
Summary: An Fe-based amorphous coating was applied on the surface of H13 steel by preheating the base materials followed by laser cladding. The study showed that preheating temperature significantly affects the quality and properties of the cladding layer, with the best comprehensive performance achieved at 250 degrees C.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Coatings & Films
Dandan Liang, Yinghao Zhou, Xiaodi Liu, Qiong Zhou, Biao Huang, Ergeng Zhang, Qiang Chen, Jun Shen
Summary: This study investigates the influence of spraying potential on the phase composition, microstructure, hardness, wettability, and corrosion performance of amorphous coatings (ACs) deposited by arc-spraying technique. The results show that ACs with denser microstructure, higher microhardness, lower surface free energy exhibit better corrosion resistance. The corrosion resistance of the coatings is closely related to the surface hydrophobicity, which is mainly governed by the microstructure of the coatings.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Metallurgy & Metallurgical Engineering
Shuilong Huang, Qingjun Chen, Li Ji, Kan Wang, Guosheng Huang
Summary: Laser 3D printing was used to prepare two different types of amorphous coatings, and their morphology, amorphous content, and microstructure were investigated. The results showed that the coating deposited under air-cooled conditions had cracks on the surface, while the coatings with higher amorphous content exhibited higher hardness and corrosion resistance. Additionally, annealing treatment of the coatings reduced crack formation.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Materials Science, Coatings & Films
Wuyan Yuan, Ruifeng Li, Yanyan Zhu, Yue Zhao, Xiaoqiang Zhang, Bin Liu, Baosen Zhang
Summary: Nickel-plated carbon nanotubes (CNTs) as additives can enhance the friction and corrosion properties of composite materials. The preparation of nickel-coated CNTs/FeCoNbBSi amorphous composite coatings on a steel shaft surface improved microstructure refinement, reduced friction coefficient, improved wear morphology, and increased corrosion resistance.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Coatings & Films
Xiaoli Feng, Haifeng Wang, Xuechao Liu, Canming Wang, Hongzhi Cui, Qiang Song, Kun Huang, Neng Li, Xue Jiang
Summary: The addition of Al promotes the formation of the BCC phase, improving corrosion resistance of the coating, but excess Al can decrease the corrosion resistance. Increasing Al content can enhance coating hardness and aggravate lattice distortion.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Qiaofeng Bai, Changyao Ouyang, Chunjiang Zhao, Binhui Han, Yingliang Liu
Summary: The study used laser cladding technology to prepare an Fe-based alloy coating on a 27SiMn hydraulic support, and a turning treatment was applied to obtain samples from the upper and middle regions of the cladding layer. Through SEM, XRD, friction and wear tests, and microhardness analysis, the influence of microstructure, phase composition, hardness, and wear resistance in different areas of the cladding layer was investigated. The results showed differences in bcc phase content, metal compound content, hardness, and wear mechanisms between the upper and middle regions of the cladding layer.
Article
Materials Science, Multidisciplinary
Changyao Ouyang, Qiaofeng Bai, Xianguo Yan, Zhi Chen, Binhui Han, Yan Liu
Summary: This paper investigated the corrosion performance of a laser cladding Fe-based alloy coating on the surface of 27SiMn steel, revealing that the Fe-based alloy coating has better corrosion resistance than the substrate.
Article
Materials Science, Coatings & Films
Hao-zheng Wang, Yan-hai Cheng, Jing-yong Yang, Qing-qing Wang
Summary: Laser remelting improved the properties of the Fe-based amorphous coating on H13 steel surface, reducing defects and increasing corrosion resistance. However, transcrystalline cracks may occur in the crystalline region after remelting.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Hao-zheng Wang, Yan-hai Cheng, Wei Song, Jin-yong Yang, Xiu-bing Liang
Summary: The research results indicate that the increase of laser scanning speed influences the microstructure and phase distribution of the cladding layer, particularly affecting the proportion of amorphous and crystalline phases. Additionally, with the increase of scanning speed, the hardness and corrosion resistance of the cladding layer are significantly enhanced.
Article
Materials Science, Coatings & Films
Yue Li, Xuewen Li, Bing Tu, Yulong Li
Summary: In this study, a composite electroplating method was used to improve traditional feeding processes in laser cladding. The coating obtained through laser cladding was characterized for morphology, hardness, wear resistance, and corrosion resistance. The results showed that the amorphous-nanocrystalline coating had exceptional surface properties, with significantly higher hardness and improved resistance to wear and corrosion compared to the 45 steel matrix.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yulong Li, Yue Li, Wenqin Wang, Min Lei, Xuewen Li
Summary: Fe-based amorphous powders were added as a precoating to a nickel coating on 45 steel during the electroplating process, followed by laser remelting to form a Fe-Ni amorphous/nanocrystalline composite coating. The coating exhibited high hardness, excellent wear resistance, and corrosion resistance, with significant improvements in hardness and elastic modulus compared to the substrate.
MATERIALS CHARACTERIZATION
(2021)
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
Materials Science, Multidisciplinary
Xichang Shang, Chunzhi Zhang, Teng Xv, Canming Wang, Kuanliang Lu
Summary: Fe-based amorphous coatings synthesized with Fe44Cr30Mo20B3C3 powders on Q235 substrate at different laser powers exhibit enhanced hardness and wear resistance. The synergistic effect between the amorphous phase and Cr23C6 contributes to the improvement of mechanical properties. The presence of Cr and the amorphous phase also enhances the passivation phenomenon and improves the corrosion resistance of the coatings.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
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)