Article
Electrochemistry
Zhang Chao, Kong Dejun
Summary: Ni60 coatings with different CeO2 mass fractions were prepared and their immersion corrosion behaviors and electrochemical performances in NaCl solution were investigated. The results showed that Ni60 coatings with 6% CeO2 mass fraction exhibited the best corrosion resistance and electrochemical corrosion resistance.
Article
Optics
Liu Zhicheng, Kong Dejun
Summary: CoCrFeNiMo-B4C coatings were prepared on the surface of Ti6Al4V alloy by laser cladding to improve its corrosive-wear and electrochemical properties. The coatings mainly consists of Co2B, FeB, Fe2B, Fe2C, and B4C phases, with B4C playing a role in grain refinement and crack reduction. With the increase of B4C mass fraction, the friction coefficients and wear rates decrease, while the corrosion current density increases, indicating a decrease in corrosion resistance.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Manufacturing
Chen Haixiang, Kun Wang
Summary: This study investigates the performance of NiCrAlMo and NiCrAlMo + 2 wt% nano-CeO2 composite coatings laser-cladded on Q235 steel substrates. The results show that the addition of nano-CeO2 improves the corrosion resistance of the coatings, making them suitable for chloride-rich environments.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
(2022)
Article
Materials Science, Ceramics
Shi Jiangzheng, Kong Dejun
Summary: The La2O3-reinforced WC10Co4Cr-Al2O3 coatings showed higher electrochemical corrosion resistance than the Al2O3-reinforced WC10Co4Cr coatings, with WC10Co4Cr-6%Al2O3-9%La2O3 coating exhibiting the highest performance among all experimental coatings.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Hu Yan, Kong Dejun
Summary: In this study, Fe90-6%Al2O3 coatings with different compositions were prepared on Q235 steel using laser cladding. The microstructure, chemical elements, surface roughness, and phases of the coatings were analyzed. The immersion corrosion and electrochemical performances of the coatings in 3.5% NaCl solution were investigated, and the corrosion mechanism was discussed in detail. The results showed that the addition of Cr and Ta elements improved the corrosion resistance of the coatings, with the (Fe90-6%Al2O3)-10%Ta coating showing the best electrochemical corrosion resistance.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Rui Shi, Chao Zhang, Dejun Kong
Summary: Ni60-4%Ti3AlC2, -8%Ti3AlC2, and -12%Ti3AlC2 composite coatings were prepared on S355 steel by laser cladding, and their corrosion behavior and electrochemical performance were analyzed. The Ni60-Ti3AlC2 composite coatings are composed of various phases, and the grain size becomes finer with increasing Ti3AlC2 mass fraction. The Ni60-12%Ti3AlC2 composite coating has the best salt spray corrosion resistance due to the formation of α-Al2O3 and TiO2 oxide films.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Engineering, Mechanical
Liu Zhicheng, Kong Dejun
Summary: TiC reinforced CoCrFeNiMo high-entropy alloy coatings were fabricated on Ti6Al4V alloy using laser cladding. The addition of TiC improved the hardness and forming quality of the coatings, while decreasing the wear rates. The CoCrFeNiMo-20%TiC coating showed the highest corrosive-wear resistance and corrosion resistance.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Materials Science, Coatings & Films
H. Wu, S. Zhang, C. L. Wu, C. H. Zhang, X. Y. Sun, X. L. Bai
Summary: In this study, 316 stainless steel was coated with CoCrFeNiNbx high entropy alloy coatings (HEACs) with different Nb contents (x=0, 0.1, 0.2, and 0.3) using laser cladding. It was found that the addition of Nb significantly reduced the grain size, increased the microhardness, and improved the wear resistance and corrosion properties of the coatings.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Weicheng Kong, Detao Liu, Chengwen Sun, Dejun Kong
Summary: A CuCMnNiTi coating was prepared on Ti6Al4V alloy using laser cladding technique. The coating's corrosion resistance was improved by tempering at 450 and 500℃.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Wenchang Wang, Jiacheng Huang, Shuiping Qin, Yan Hu, Dejun Kong
Summary: Fe90-6%Al2O3 coatings with different Ti mass fractions were prepared on S355 steel by laser cladding. The addition of Ti resulted in a more compact microstructure of (Fe90-6%Al2O3)-Ti coating, composed of Fe-Cr with the cubic crystal plane. The corrosion resistance of the coatings increased with the Ti mass fraction, attributed to the formation of Fe-Cr phase. The Fe90-6%Al2O3-15%Ti coating exhibited the highest corrosion resistance, with the passive films of Cr and Ti playing a role in corrosion resistance.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Zhang Chao, Kong Dejun
Summary: Ni60-5%Ti3SiC2, -10%Ti3SiC2 and -15%Ti3SiC2 coatings were prepared on S355 steel by laser cladding. The microstructure, phases, and hardness of the coatings were analyzed. The Ni60-5%Ti3SiC2 coating showed the best tribological performance with increased friction stability and reduced COF and wear rate compared to the substrate. The wear mechanisms of the coatings were identified as abrasive wear, adhesive wear, and abrasive wear for Ni60-5%Ti3SiC2, Ni60-10%Ti3SiC2, and -15%Ti3SiC2 coatings, respectively.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Hui Dong, Peng-Fei Guo, Yan Han, Ru-Xue Bai, Zi-Chen Yang, San-Qi Zhang
Summary: Heat treatment was conducted on high speed laser-cladded Ni/316L coating to enhance corrosion resistance. Coatings were heat treated at temperatures of 650 ℃, 700 ℃, 750 ℃, and 800 ℃. The results revealed that coating porosity was independent of annealing temperature and the coating's chemical composition remained intact after heat treatment. Grain size decreased initially and then increased with increasing heat treatment temperature. The content of equiaxed grains and Fe19Ni precipitation phase increased with temperature. Precipitation led to higher corrosion resistance in heat-treated coatings compared to as-cladded coatings. The corrosion resistance of heat-treated coatings increased initially and then decreased due to the combined effect of precipitation and grain morphology. Therefore, corrosion resistance can be improved by annealing, but suitable parameters need to be determined.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Weicheng Kong, Kangmei Li, Jun Hu
Summary: In this study, a FeCoCrMoSi amorphous coating was fabricated on Ti6Al4V alloy using subsonic flame spraying technique. The corrosion resistance of the coating was systematically investigated, and it was found that the dense amorphous structure of the FeCoCrMoSi coating significantly improved the corrosion resistance of the Ti6Al4V alloy.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Shao Lifan, Ge Yuan, Kong Dejun
Summary: Cu-10Al coatings with different mass fractions of MoS2 were fabricated on Q235 steel using laser cladding. The results show that increasing the MoS2 content can decrease the coefficient of friction and wear rate of the coatings, and reduce wear failure.
SURFACES AND INTERFACES
(2022)
Article
Metallurgy & Metallurgical Engineering
Hu Yan, Kong Dejun
Summary: This study investigates the effects of Cr and Ta additions on the friction performance and corrosion-wear mechanism of Fe90-Al2O3 coatings in 3.5% NaCl solution. The addition of Cr and Ta improves the corrosion-wear resistance of the Fe90-Al2O3 coating, with the Fe90-Al2O3-10%Cr coating exhibiting the best resistance among the three types of coatings. The additions of Cr and Ta play a role in solid solution strengthening.
ANTI-CORROSION METHODS AND MATERIALS
(2022)
Article
Materials Science, Ceramics
Shi Jiangzheng, Kong Dejun
Summary: The La2O3-reinforced WC10Co4Cr-Al2O3 coatings showed higher electrochemical corrosion resistance than the Al2O3-reinforced WC10Co4Cr coatings, with WC10Co4Cr-6%Al2O3-9%La2O3 coating exhibiting the highest performance among all experimental coatings.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Metallurgy & Metallurgical Engineering
Shao Lifan, Kong Dejun
Summary: The addition of titanium increases the hardness of Cu10Al-Ti-MoS2 coatings, but the coefficient of friction and wear rate show an opposite trend. The wear mechanisms of Cu10Al-3Ti-8MoS2, -6Ti-8MoS2, and -9Ti-8MoS2 coatings mainly involve adhesive wear and abrasive wear.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2022)
Review
Materials Science, Multidisciplinary
Jia-li Zhou, Yan-hai Cheng, Yong-xiong Chen, Xiu-bing Liang
Summary: This paper introduces the research progress and preparation process of refractory high-entropy alloys (RHEAs), summarizes the research status in compositional design, doping, and phase structure regulation, and proposes suggestions for future development.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yanhai Cheng, Chengming Cao, Xinyi Yang, Jiali Zhou, Jinyong Yang, Xiubing Liang, Xingsheng Li
Summary: This paper presents an experimental study on the residual stresses in the depth direction of the cladding layer during the remanufacturing of key components for shield tunneling machines using laser melting deposition (LMD). The results show that the depth of the zero stress layer increases with the thickness of the cladding layer. Additionally, different residual stress states exist in the cladding layer and the heat-affected zone (HAZ).
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Metallurgy & Metallurgical Engineering
Zhang Chao, Wei Nan, Kong Dejun
Summary: In-situ grown micro-arc oxidation (MAO) coating on Ti6Al4V alloy improves the friction-wear performance. The obtained coating exhibits an irregular-pore structure and mainly consists of TiO2 phase. Under a normal load of 2 N, the MAO coating shows the best friction reduction and wear resistance.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2023)
Article
Materials Science, Multidisciplinary
Furong Cao, Jufang Chen, Dejun Kong
Summary: Ti-NiCrAl coating was fabricated on Ti6Al4V alloy substrate by laser cladding, with Ti originating from substrate's diluted element. The coating consists of NiTi and NiTi2 phases, as well as trace CrO and Al2O3 phases, where the oxide phases act as an effective barrier for high-temperature protection. The coefficient of friction and wear rate decrease with increasing temperature, attributed to the phase transformation of NiTi and NiTi2. The wear mechanism involves a combination of abrasive wear and adhesive wear, with the phase transformation of NiTi and NiTi2 playing roles in reducing friction and improving wear resistance.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Engineering, Manufacturing
Yongfu Xu, Dejun Kong
Summary: In this study, Ni-WC coatings with different Ti2SnC mass fractions were prepared on S136 steel substrate by laser cladding, and the effects of Ti2SnC mass fraction on the microstructure and tribological properties of the coatings were investigated. The results show that the addition of an appropriate Ti2SnC mass fraction can reduce the coefficient of friction and wear rate of the coatings, providing important references for the friction and wear of Ti2SnC MAX phase in the field of coatings.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
(2022)
Article
Materials Science, Ceramics
Zhicheng Liu, Jiangzheng Shi, Chuang He, Fan Wang, Dejun Kong
Summary: WC-10Co4Cr coating was prepared on Cr12MoV steel by laser cladding to enhance its wear resistance. The morphology, chemical composition, and phases of the coating were analyzed using SEM, energy disperse spectroscopy, and X-ray diffraction, respectively. The tribological performance was evaluated using a ball-on-plate friction machine, and the wear mechanism was discussed. The results showed that the WC-10Co4Cr coating composed of WC and Co6W6C phases had the highest hardness and best friction reduction and wear resistance at a laser power of 1500 W. The wear mechanism of the coating was fatigue wear and abrasive wear, attributed to the increase of hard WC mass fraction.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Review
Materials Science, Multidisciplinary
Jia-li Zhou, Jin-yong Yang, Xiao-feng Zhang, Fu-wen Ma, Kai Ma, Yan-hai Cheng
Summary: This paper reviews the tribological properties of high-entropy alloys (HEAs), including their definition, preparation methods, testing techniques, and characterization methods. It analyzes the influence of HEAs components on tribological properties and the anti-wear effect of process optimization. The paper also discusses various wear mechanisms and the effects of different metal and non-metal elements in HEAs on tribological properties. Additionally, it reviews the strengthening effects of surface remelting, heat treatment, and surface ceramization on the wear resistance of HEAs. Finally, the paper points out the challenges in developing wear resistance for HEAs and provides suggestions for future research directions.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Detao Liu, Chuang He, Fan Wang, Dejun Kong
Summary: WC-10Co4Cr-5% B4C, -10% B4C, and -15% B4C coatings were fabricated on Cr12MoV steel by laser cladding technique to enhance wear resistance. The influence of B4C mass fraction on the phases, morphologies, and chemical composition of the coatings was investigated using X-ray diffraction, scanning electron microscopy, and energy-dispersive spectroscopy. The tribological performance was evaluated with a ball-on-disk tester. The results show that the wear resistance of the coatings increases with increasing B4C mass fraction, with WC-10Co4Cr-5% B4C coating exhibiting the best performance due to grain refinement and solid solution strengthening. However, excessive B4C content leads to WC decomposition and coarse microstructure, resulting in reduced tribological performance. The wear mechanism is mainly abrasive wear for WC-10Co4Cr-5% B4C and -10% B4C coatings, while both abrasive and adhesive wear occur in WC-10Co4Cr-15% B4C coating.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Zhicheng Liu, Chuang He, Dejun Kong
Summary: A laser remelting process was used to treat a plasma sprayed CoCrFeNiMo high-entropy alloy coating on Ti6Al4V alloy, and the corrosion resistance of the obtained coatings was evaluated through salt spray testing and electrochemical analysis. The results revealed that the corrosion mechanisms of the plasma sprayed and laser remelted coatings were pitting corrosion + crevice corrosion and pitting corrosion + uniform corrosion, respectively. The laser remelted coating exhibited higher charge transfer resistance compared to the plasma sprayed coating. Furthermore, the corrosion resistance of the plasma sprayed coating was enhanced by laser remelting, attributed to the formation of passive films.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Engineering, Biomedical
Jianwei Zhou
Summary: In this study, a porous Cur/Gelatin scaffold was created to inhibit vascular invasion and prevent endochondral ossification of BMSC-regenerated cartilage. The Cur/Gelatin scaffold significantly inhibited vascular invasion and maintained the cartilage features of BMSC-generated cartilage.
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
(2023)
Article
Materials Science, Multidisciplinary
Hu Yan, Kong Dejun
Summary: In this study, Fe90-6%Al2O3 coatings with different compositions were prepared on Q235 steel using laser cladding. The microstructure, chemical elements, surface roughness, and phases of the coatings were analyzed. The immersion corrosion and electrochemical performances of the coatings in 3.5% NaCl solution were investigated, and the corrosion mechanism was discussed in detail. The results showed that the addition of Cr and Ta elements improved the corrosion resistance of the coatings, with the (Fe90-6%Al2O3)-10%Ta coating showing the best electrochemical corrosion resistance.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Engineering, Mechanical
Weicheng Kong, Chengwen Sun, Dejun Kong
Summary: TiO2-Cu composite coatings with high TiO2 content were fabricated on Ti6Al4V alloy by laser cladding to improve its tribological properties in the bioengineering field. The effects of TiO2 mass fraction on the microstructure and chemical compositions of obtained composite coatings were investigated. The coefficients of friction and wear rates of TiO2-Cu coatings were investigated, and the wear mechanism was studied. The results show that TiO2 plays a significant role in reducing friction and improving wear resistance. The wear mechanism is dominated by abrasive wear with slight adhesive wear.
Article
Metallurgy & Metallurgical Engineering
Sun Chengwen, Li Wei, Kong Dejun
Summary: NiCr coatings were prepared on H13 steel by laser cladding with different laser power. The microstructure and phases of the coatings were analyzed, and the effect of laser power on friction-wear performance at high-temperature was investigated. The results showed that suitable laser power can improve the surface quality and wear resistance of NiCr coatings.
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH
(2023)
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)
