Article
Materials Science, Coatings & Films
Xiaopeng Lu, Jirui Ma, Marta Mohedano, Borja Pillado, Raul Arrabal, Kun Qian, Yan Li, Tao Zhang, Fuhui Wang
Summary: The study showed that sealing plasma electrolytic oxidation (PEO) coatings on AZ91 Mg alloy in calcium nitrate solutions at different pH values can enhance the corrosion resistance of the coatings. Adding SDS facilitates the formation of precipitates, resulting in hydrophobic coatings with poorer paint adhesion but better corrosion resistance.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Metallurgy & Metallurgical Engineering
Ting Wu, Carsten Blawert, Xiaopeng Lu, Maria Serdechnova, Mikhail L. Zheludkevich
Summary: The presence of Li and Li-rich phases were found to be crucial for the treatment result on MgLi alloy's coating growth, rather than the original lattice structure. The modified discharge behavior of MgLi alloy led to a different microstructure of the coating, making it more susceptible to dissolution.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Chemistry, Physical
Kun Yu, Ping Li, Qi Han, Qiang Wang, Sergey A. A. Karpushenkov, Xiaopeng Lu, Oleg V. Ignatenko
Summary: The effect of silver particles on the antibacterial property, degradation process, and cytocompatibility of plasma electrolytic oxidation coatings on magnesium surface was investigated. The results showed that the incorporated silver particles provided effective antibacterial property and had good cytocompatibility with MC3T3-E1 cells.
SURFACES AND INTERFACES
(2022)
Article
Metallurgy & Metallurgical Engineering
Yan Li, Xiaopeng Lu, Maria Serdechnova, Carsten Blawert, Mikhail L. Zheludkevich, Kun Qian, Tao Zhang, Fuhui Wang
Summary: This study achieved in-situ incorporation of layered double hydroxides (LDH) nanocontainers into plasma electrolytic oxidation (PEO) coatings on AZ91 Mg alloy. Fumarate was selected as the Mg corrosion inhibitor for exchange and intercalation into the nanocontainers, which were then incorporated into the coating. It was found that the presence of LDH nanocontainers increased the thickness and compactness of the coatings. The corrosion resistance of the coatings was greatly enhanced and stabilized by the loaded inhibitor and nanocontainers through ion-exchange when corrosion occurred.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Physical
Katarzyna Lesniak-Ziolkowska, Kasjana Brodacz, Dorota Babilas, Mateusz Dulski, Agata Blacha-Grzechnik, Xiaopeng Lu, Alicja Kazek-Kesik, Wojciech Simka
Summary: This study investigated the surface modification of titanium using a plasma electrolytic oxidation (PEO) process with different Mg-containing additives. The results showed that porous oxide layers were formed on the titanium surface, increasing the roughness. The presence of bioactive Ca, P, and bacteriostatic Mg in the oxide layer was confirmed. The PEO coatings exhibited bacteriostatic and fungistatic properties, making them potential implant materials for bone tissue.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Coatings & Films
Yue Guo, Aleksey Rogov, Alexander Hird, Beatriz Mingo, Allan Matthews, Aleksey Yerokhin
Summary: This study investigated the formation of Mg2SiO4 coatings on cp-Mg using Plasma Electrolytic Oxidation (PEO) with sawtooth anodic current pulses. The results showed that the application of sawtooth pulses allowed for control over coating morphology and microdischarge characteristics. Additionally, it was found that the use of anodic sawtooth pulses with a negative ramp facilitated defect healing during coating formation, resulting in more uniform coatings with lower porosity and slower degradation rate of the magnesium substrate.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Xue Zhang, Shao-Dong Cui, Lin Zhou, Jing-Bao Lian, Jiao He, Xiao-Wu Li
Summary: The study focused on the performance of Ca-P coatings prepared in solutions with different pH values on pure magnesium substrate, showing that the 5.7Ca-P coating has excellent corrosion resistance and biocompatibility, providing stable protection in the initial degradation stage.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Metallurgy & Metallurgical Engineering
Weiyi Zhang, Yunhui Du, Peng Zhang
Summary: In this study, an ordinal discharge (OD) mode of plasma electrolytic oxidation (PEO) coating was developed to weaken the eruption of breakdown melt and improve the performance of the coating. By adjusting the mass ratio and voltage, the inner dense layer of the coating was thickened while the outer loose layer was densified, leading to enhanced corrosion resistance and reduced wear rate.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Coatings & Films
Jinhe Dou, Jing Wang, Huancai Li, Yupeng Lu, Huijun Yu, Chuanzhong Chen
Summary: Plasma electrolytic oxidation (PEO) is an effective surface treatment technique for enhancing the corrosion resistance of Mg alloy, but the micro-pores and micro-cracks of the PEO coating can limit its protection capability. In this study, a dense Ca3Al2(OH)(12) layer was fabricated on the PEO coating surface using hydrothermal treatment (HT) to create a PEO/HT composite coating, which showed improved bioactivity and corrosion resistance compared to PEO coating and Mg alloy. The growth process of the Ca3Al2(OH)(12) layer on the PEO coating surface was discussed.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Chen Ma, Dong Wang, Jinyu Liu, Ning Peng, Wei Shang, Yuqing Wen
Summary: Plasma electrochemical oxidation (PEO) is used to create ceramic coatings on magnesium alloys. This study introduces a new method for in-situ sealing of PEO coatings using four-layer voltage and sol addition. The characterization of the coatings showed decreased porosity and increased thickness, leading to improved corrosion resistance. The self-sealing behavior of PEO was also explained in this article.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Materials Science, Coatings & Films
Luyao Xu, Dejian Zhang, Huijuan Su, Peng Yu, Yong Wan, Huilai Sun
Summary: This study investigated the effects of pullulan concentration in electrolyte solutions on the corrosion and tribocorrosion performance of AZ31B magnesium alloys after plasma electrolytic oxidization (PEO) treatment. The results showed that the addition of pullulan enhanced the compactness of the PEO coating, resulting in improved corrosion resistance and anti-tribocorrosion performance. The PEO coating produced in electrolyte solution containing 1.0 g/L pullulan exhibited the best overall performance.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Coatings & Films
Chao Yang, Hu Cai, Suihan Cui, Jian Huang, Jiayu Zhu, Zhongcan Wu, Zhengyong Ma, Ricky K. Y. Fu, Liyuan Sheng, Xiubo Tian, Paul K. Chu, Zhongzhen Wu
Summary: This study improves the corrosion resistance of AZ31B magnesium alloy by coating it with a plasma electrolytic oxidation (PEO) film and modifying it with insoluble zinc phosphate. The combination of PEO and zinc phosphate enhances the corrosion resistance and significantly increases the lifetime of the magnesium alloy.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Applied
Tianlu Li, Fengdong Sun, Yun Zhao, Minfang Chen
Summary: In this study, a two-step treatment involving SiO2 gel and hexadecyltrimethoxysilane was used to modify PEO coatings on AZ91 alloy. The treatment effectively sealed the microholes in the PEO coating, resulting in a dense coating with improved hydrophobicity. The corrosion resistance of the substrate alloy was significantly enhanced, making it a promising approach for post-treatment of PEO coatings.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Materials Science, Multidisciplinary
Pingping Jia, Yaokun Pan, Lang Yu, Jingtao Wang, Rui Feng, Yongxiao Wang, Xiaoying Fang, Chuanzhong Chen
Summary: This study focuses on the preparation of biodegradable calcium phosphate (CaP) ceramic coatings on self-designed Mg-2.0Zn-0.6Ca-xSi alloys through plasma electrolytic oxidation (PEO). The influence of calcium (Ca) and silicon (Si) on alloy microstructure, coating formation, and biomineralization mechanisms were investigated. The in vitro bioactivity and degradability of the CaP coatings were evaluated through immersion tests. The results suggest that the microstructure of the Mg-2.0Zn-0.6Ca-xSi alloys can affect the formation and growth of PEO coatings.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Sivan Sela, Konstantin Borodianskiy
Summary: Zirconium alloys are bioinert materials widely used in biomedical applications, and increasing their bonding with human tissues is a major research focus. This study presents a promising approach of plasma electrolytic oxidation (PEO) surface treatment in molten salt. PEO creates a highly adhesive surface to the bioenvironment, and processing in molten salt electrolyte reduces impurities on the surface. The synthesized ZrO2 coatings showed improved biocompatibility, microhardness performance, and corrosion resistance.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Ruiling Jia, Ming Zhang, Lina Zhang, Wei Zhang, Feng Guo
JOURNAL OF ALLOYS AND COMPOUNDS
(2015)
Article
Materials Science, Multidisciplinary
Li-na Zhang, Ruiling Jia, Dan Li, Wei Zhang, Feng Guo
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2015)
Article
Metallurgy & Metallurgical Engineering
Jing Liu, Tao Zhang, Wei Zhang, Van-Ge Yang, Ya-Wei Shao, Guo-Zhe Meng, Fu-Hui Wang
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2015)
Article
Materials Science, Multidisciplinary
Wei Zhang, Kui Du, Xingqiu Chen, Liyuan Sheng, Hengqiang Ye
PHILOSOPHICAL MAGAZINE
(2016)
Article
Materials Science, Coatings & Films
Yan Chen, Yange Yang, Tao Zhang, Wei Zhang, FuhuiWang, Xiaopeng Lu, Carsten Blawert, Mikhail L. Zheludkevich
SURFACE & COATINGS TECHNOLOGY
(2016)
Article
Electrochemistry
Fangfang Wei, Wei Zhang, Tao Zhang, Fuhui Wang
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2017)
Article
Chemistry, Physical
Fangfang Wei, Wei Zhang, Tao Zhang, Fuhui Wang
JOURNAL OF ALLOYS AND COMPOUNDS
(2017)
Article
Metallurgy & Metallurgical Engineering
Sheng Liyuan, Zhang Wei, Lai Chen, Guo Jianting, Xi Tingfei, Ye Hengqiang
ACTA METALLURGICA SINICA
(2013)
Article
Polymer Science
Bo Tian, Haixiao Li, Wei Zhang, Sanxi Li
JOURNAL OF APPLIED POLYMER SCIENCE
(2013)
Article
Chemistry, Multidisciplinary
Yanfang Ding, Ruiling Jia, Wei Zhang, Huixia Zhang, Jian Hou
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
(2019)
Article
Metallurgy & Metallurgical Engineering
Wei Zhang, Zhi-Hong Dong, Hong-Wei Kang, Chen Yang, Yu-Jiang Xie, Mohamad Ebrahimnia, Xiao Peng
Summary: The heat treatment of a ferrite-austenite 12CrNi2 alloy steel additively manufactured by laser melting deposition (LMD) was conducted using direct quenching (DQ) and tempering inter-critical quenching (TIQ) at 800°C to enhance its strength-ductility balance. The treatment resulted in a martensite-ferrite dual-phase (DP) microstructure with improved coordination of deformability between martensite and ferrite. The multi-step TIQ treatment was found to be more effective in enhancing the alloy steel's strength-ductility balance compared to the DQ treatment, due to its optimization of microstructure and elimination of adverse grain orientation for plastic deformation.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2021)
Article
Chemistry, Physical
Liye Zhu, Wei Zhang, Haitao Liu, Lei Liu, Fuhui Wang, Ziping Qiao
Summary: Reducing the loose-layer-to-dense-layer ratio in PEO coatings is crucial for improving corrosion resistance and expanding applications. This study investigates the discharge evolution during the PEO process and discovers a novel chain-like discharge. The microstructure and composition of the coatings are analyzed, and the electrochemical behavior and adhesion strength are evaluated. A mechanism explaining the influence of the plasma spark discharge state on the coatings is proposed.
Article
Materials Science, Multidisciplinary
Yongchao Zhang, Wei Zhang, Beining Du, Wenqing Li, Liyuan Sheng, Hengqiang Ye, Kui Du
Article
Materials Science, Multidisciplinary
Zhou Weiguang, Jia Ruiling, Zhang Guilong, Guo Feng, Zhang Wei
RARE METAL MATERIALS AND ENGINEERING
(2017)
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)