Article
Chemistry, Physical
You Wu, Ru Yan, Yangyang Duan, Juan Qiu, Ting Chen, Houyi Ma
Summary: By utilizing an eco-friendly tannic acid conversion film technology, TA and TA/Zn films were successfully fabricated in this study, demonstrating excellent corrosion protection and enhanced adhesion between the substrate and coating.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Su Pan, Xiaohua Tu, Jianxing Yu, Yang Zhang, Chengping Miao, Yaling Xu, Rui Fu, Jiayou Li
Summary: This study investigated the optimization of NaOH-Na2SiO3-Na2B4O7 electrolyte for the plasma electrolytic oxidation of AZ31B magnesium alloy. The results showed that NaOH had a significant effect on film thickness, while Na2SiO3 had the greatest impact on corrosion resistance. The optimized electrical parameters resulted in a uniform and compact anodized coating, with improved corrosion properties compared to the substrate.
Article
Materials Science, Multidisciplinary
Xinghui Sun, Shawei Tang, Ying Zhou, Ying Mao, Jin Hu, Wen Wang, Jiaping Han
Summary: A myristate coating containing Ca and Ce (Ca/Ce coating) was prepared on the surface of an anodized magnesium alloy by electrodeposition. The coatings exhibited superhydrophobicity and excellent corrosion resistance in 3.5 wt% NaCl solution. The concentration ratio of Ca2+ and Ce3+ in the electrolyte solution was found to affect the morphology, hydrophobicity, and corrosion properties of the Ca/Ce coatings. The introduction of Ce ions in the electrolyte solution enhanced the thickness and hydrophobicity of the coatings compared to the single Ca coating. An appropriate ratio of Ca2+ and Ce3+ was necessary for the Ca/Ce coating to provide durable and stable protection for magnesium alloy with rare cracks and high superhydrophobicity.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Yonghua Chen, Wenhui Yao, Liang Wu, Jing Chen, Fusheng Pan
Summary: The poor corrosion resistance of magnesium (Mg) alloys can be significantly improved by synthesizing a layered double hydroxides (LDHs) film on their surfaces. The microstructure of Mg alloys, specifically the addition of Mn, has a significant impact on the growth and corrosion protection effectiveness of LDHs film. An Mg-2Zn-xMn alloy with different Mn contents was studied, revealing the best corrosion protection performance with 1 wt.% Mn content in the LDHs film.
Article
Engineering, Chemical
Chunyan Tang, Xingwang Zhao, Jinglei Lei, Lingjie Li
Summary: The study prepared a film in lanthanum-nitrate and stearic-acid solutions that can provide durable protection for magnesium alloys, showing superior superhydrophobicity and corrosion resistance. Various durability tests confirmed the effective protection of the film for magnesium alloys.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Metallurgy & Metallurgical Engineering
Zhao-Qi Zhang, Li Wang, Mei-Qi Zeng, Rong-Chang Zeng, Cun-Guo Lin, Zhen-Lin Wang, Dong-Chu Chen, Qiang Zhang
Summary: An integrated superhydrophobic polypropylene (PP) coating was fabricated on micro-arc oxidized Mg substrate, exhibiting outstanding hydrophobicity and corrosion resistance with a micron-scaled granular structure and high water contact angle. The coating significantly enhances the protective effects by improving bonding strength, corrosion resistance, and durability.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Chemistry, Physical
Fuzhen Li, Ruixue Sun, Kezheng Chen
Summary: In this study, an anodized coating was prepared at low voltage on AZ31B Mg alloy, followed by one-step hydrothermal treatment to produce stearic acid modified CeO2 coating with superhydrophobicity. The anodized coating combined well with the substrate, and the outer stearic acid modified CeO2 coating covered the inner anodized coating compactly. The composite coating showed excellent superhydrophobicity and self-cleaning performance, while greatly improving the corrosion resistance of the substrate. The Ce ions released from the coating upon scratching might prevent further corrosion, exhibiting self-healing behavior.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Kwangmin Choi, Seungwon Kang, Heon Kang
Summary: The study utilizes the PEO technique to improve the strength and corrosion resistance of magnesium alloys, while also enhancing the fatigue life. It is worth noting that the crack initiation point is at the interface rather than near the interface pores.
Article
Metallurgy & Metallurgical Engineering
B. Pillado, B. Mingo, R. del Olmo, E. Matykina, A. M. Kooijman, Y. Gonzalez-Garcia, R. Arrabal, M. Mohedano
Summary: Zinc aluminium (Zn-Al) and lithium aluminium (Li-Al) - layered double hydroxides (LDH) coatings with incorporated inhibitors (Li -, Mo- and W-based) were successfully synthesized on AZ31 Mg alloy. Zn -Al LDH W and Li -Al LDH Li showed the highest corrosion resistance and were selected for further evaluation.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Coatings & Films
Runjia Liu, Yan Liu, Qiwen Yong, Zhi-Hui Xie, Liang Wu, Chuan-Jian Zhong
Summary: The long-term corrosion resistance of conventional micro-arc oxidation (MAO) coatings on magnesium alloy is limited by the inherent micro-scale pores. Zeolitic imidazolate framework-8 (ZIF-8) and zinc gluconate (ZnG) loaded ZIF-8 (ZnG@ZIF-8) were synthesized and incorporated into the MAO coating to enhance the corrosion resistance. The (ZIF-8 + ZnG@ZIF-8)/MAO composite coating showed significant improvement in corrosion protection compared to the blank MAO coating.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Optics
Wei Wang, Xiangjin Li, Weijun Liu, Fei Xing, Jing Wang, Kai Zhang
Summary: In this paper, the effect and mechanism of nanosecond pulse laser cleaning on the anodic oxide film on the surface of 7075 aluminum alloy were studied. The effects of different laser energy densities on the surface morphology, composition, roughness, microhardness, and contact angle of the 7075 aluminum alloy were investigated. The results showed that laser cleaning can effectively remove the anodic oxide film on the surface of the 7075 aluminum alloy and the new surface formed after laser cleaning is undamaged. Compared with mechanical removal methods, laser cleaning can improve the microhardness and hydrophobicity of the surface, providing feasibility for regular use after laser cleaning.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Physical
Yue Liu, Huan Yao, Zhi-Hui Xie, Gang Yu, Chuan-Jian Zhong
Summary: In this study, a new metal-organic framework (MOF) modified TiO2 nanotubes (NTs) composite was prepared by a solvothermal method, which showed improved photoelectrochemical performance under visible light irradiation and could be used as a stable photoanode for photogenerated cathodic protection. Compared with single-component TiO2 photoanode, the MOF/TiO2 composite exhibited higher photogenerated current density, lower charge transfer resistance, and negatively shifted bias threshold, providing stable photogenerated cathodic protection for the electrode.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Yue Liu, Feng Peng, Guang-Ling Yang, Zhi-Hui Xie, Wenxin Dai, Yuejun Ouyang, Liang Wu, Chuan-Jian Zhong
Summary: This study demonstrates the utilization of photoelectrochemical cathodic protection (PECCP) with a metallic nickel interlayer for the indirect corrosion protection of metals with low self-corrosion potential. By coupling a covalent organic framework decorated TiO2 photoanode with nickel coating on magnesium alloy, the PECCP efficiency is enhanced. The composite structure and the enhanced performance are characterized and a corrosion protection mechanism is proposed.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Jiyuan Zhu, Chenxi Jia, Yuanzhen Duan
Summary: A Mg(OH)(2)/SiO2 composite film with long-term corrosion resistance was prepared on AZ91D magnesium alloy using an alkali-thermal process. The prepared film showed excellent corrosion resistance, with only slight pitting marks on the surface after being immersed in 5 wt% NaCl solution for 168 hours. The preparation process is straightforward and environmentally friendly, resulting in cost savings and increased efficiency.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Ying Wang, Xingyi Zhou, Minhao Yin, Jibin Pu, Ningyi Yuan, Jianning Ding
Summary: A superhydrophobic composite coating based on LDHs was constructed on Mg alloy through laser treatment, in situ growth of LDHs, and modification with OTS, showing excellent corrosion resistance and long-term stability. This was attributed to the superhydrophobicity, compactness, ion-exchange capacity of LDH layer, and dense Si-O-Si network within the OTS layer.
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)