Article
Chemistry, Physical
Zhiyuan Feng, Charles C. Xu, Dadi Zhang, Rudolph Buchheit
Summary: The study showed that the corrosion resistance of AZ31 Mg alloy was significantly improved after coating treatment with 5 mM or 10 mM sodium selenite, with the protection mechanism attributed to the transformation of selenite to insoluble selenium, the formation of insoluble MgSeO3 hydrate, and the polymerization of amorphous selenium.
Article
Chemistry, Physical
Yuxiang Liu, Xiaoting Liu
Summary: This study investigated the early-stage corrosion behavior of AZ91 alloy before and after microarc oxidation treatment in a 3.5% NaCl solution. The results showed that the coating provided excellent corrosion resistance, while the alloy exhibited easily initiatable but difficult-to-propagate pitting corrosion. In contrast, the localized corrosion of the coated alloy proceeded continuously, leading to the formation of easily damaged corrosion products.
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
Materials Science, Multidisciplinary
Baojie Wang, Jiyu Hou, Jiyu Luan, Daokui Xu, Haijing Sun, Jie Sun
Summary: By conducting experiments, it was found that the corrosion behaviors of Mg-8%Li alloy varied significantly in NaCl solutions with different concentrations. The hydrogen evolution rate in the 0.9 wt.% NaCl solution was higher compared to the 3.5 wt.% NaCl solution, and the localized corrosion was weaker and mainly occurred in the alpha-Mg phase.
Article
Materials Science, Multidisciplinary
Zheng Shao, Masashi Nishimoto, Izumi Muto, Yu Sugawara
Summary: In situ observations were conducted on the filiform corrosion process of die-cast AZ91D magnesium alloy in 0.1 and 0.01 M NaCl solutions (pH 8.0) using a microscale polarization technique. The morphology changes were monitored in real-time through an optical microscope, revealing that filiform corrosion mainly occurred in lamellar alpha + beta structures adjacent to beta phases, with the beta phases remaining intact after corrosion.
Article
Metallurgy & Metallurgical Engineering
Wei Qiu, Ya-wen Li, Gang Huang, Jian Chen, Yan-jie Ren, Wei-ying Huang, Wei Chen, Tang-qing Wu, Mao-hai Yao, Ai-hu Xiong
Summary: The microstructures and corrosion behavior of AZ91-xVN alloys were studied, and it was found that VN can refine and modify the microstructures of the alloys. The corrosion resistance of the alloys first improved and then deteriorated with the addition of VN, mainly due to the influence of grain boundaries and galvanic corrosion.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Materials Science, Multidisciplinary
Tianliang Zhao, Zhexu Wang, Yujun Feng, Qian Li
Summary: In this study, a compound inhibitor consisting of sodium phosphate and sodium dodecyl sulphate was developed to mitigate the corrosion of magnesium alloys. The results showed that this compound inhibitor could provide long-term protection and achieved high inhibitive efficiency under specific conditions.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Kwangmin Choi, Jaehyuck Shin, Heon Kang
Summary: This study investigated the corrosion behaviors of commercial die-cast Mg alloys with different thicknesses in neutral and alkali solutions. The results showed that decreasing the thickness of a specimen improved its hardness. Specimens with larger eutectic phases were more susceptible to corrosion under neutral conditions but were protected by passivation films in alkaline solution. Fine eutectic phases improved corrosion resistance by forming a net structure that inhibited corrosion propagation. It is suggested that the size and distribution of eutectic phases should be controlled according to the environment.
Article
Chemistry, Physical
Jichil Majhi, Sourav Ganguly, A. Basu, A. K. Mondal
Summary: The study shows that the corrosion resistance of AZ91 alloy can be significantly improved by adding Ca and Bi, with AZ91 + 1.0Ca alloy exhibiting the best corrosion resistance. The combined addition of Ca and Bi is more effective in enhancing the corrosion resistance of the alloy compared to individual additions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Xin Lv, Kun-Kun Deng, Cui-Ju Wang, Kai-Bo Nie, Quan-Xin Shi, Wei Liang
Summary: The addition of trace submicron SiC particles can promote the formation of lamellar (α+β) structure and improve the corrosion resistance of the alloy. However, the precipitation of granular β-Mg17Al12 phase with increased SiCp content leads to a gradual decrease in corrosion resistance.
MATERIALS CHEMISTRY AND PHYSICS
(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
Haonan Li, Min Fan, Kui Wang, Gaopeng Xu, Haiyan Jiang, Qudong Wang, Yingxin Wang
Summary: This study investigates the effect of TiCN nanoparticle addition and cooling rates on the corrosion behavior of AZ91 alloys in 0.1 M NaCl solution. The results show that the addition of TiCN nanoparticles at a cooling rate of 5 K/s improves the corrosion resistance of the alloy, while a cooling rate of 60 K/s has a detrimental effect on the corrosion performance. The distribution of nanoparticles plays a crucial role in inhibiting corrosion, with intergranular distribution showing better corrosion resistance.
Article
Engineering, Mechanical
Jian Pu, Yali Zhang, Xiaogang Zhang, Xinlu Yuan, Pingdi Ren, Zhongmin Jin
Summary: The fretting-corrosion performance of 6082 aluminum alloy in 3.5% NaCl solution was investigated by considering displacements and loads. A running condition fretting map (RCFM) was established. Different wear mechanisms were observed in PSR, MFR, and SR, with corrosion being accelerated in MFR and SR, but weakened in PSR.
Article
Materials Science, Multidisciplinary
Diqing Wan, Hao Tang, Yumeng Sun, Guilin Zeng, Shaoyun Dong, Guoliang Han, Yu Wang, Fan Yang, Yongyong Wang
Summary: This study uses the sol-gel method to prepare a TiO2 coating on the surface of AZ91 magnesium alloy, resulting in a film with excellent corrosion resistance. XRD and SEM are used to characterize the composition, surface structure, and microstructure of the TiO2 coatings. Hydrogen evolution experiments and electrochemical tests confirm that the TiO2 coating effectively improves the corrosion resistance of the AZ91 magnesium alloy.
Article
Materials Science, Multidisciplinary
Zhiquan Huang, Renyao Huang, Yanjie Pei, Xiangyu Gao, Lianyun Jiang, Jinchao Zou
Summary: This article systematically studies the corrosion and discharge behaviors of AZ91 magnesium alloy after hot rolling with different deformations (0%, 20%, 30%, and 40%). The results show that the corrosion resistance and discharge activity of AZ91 are closely related to the fragmentation of the second phase, the distribution of the second phase at the grain boundary, and the increase of the grain boundary after hot rolling.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Chemistry, Physical
Shijie Ren, Mao Sun, Xiaotian Guo, Xianhu Liu, Xueyuan Zhang, Lei Wang
Summary: This study demonstrates the importance of interface-confined surface modification in modulating charge transfer pathways for efficient solar energy conversion. By using a PEC reduction strategy, the interface-confined CoMoO4-x/BiVO4 system exhibits excellent photocorrosion resistance and long-term stability, showing potential for high-performance photoelectrode design in a neutral environment.
Article
Chemistry, Physical
Li-Feng Zhu, Aizhen Song, Bo-Ping Zhang, Xiao-Qi Gao, Zhi-Hang Shan, Gao-Lei Zhao, Junqi Yuan, Deng Deng, Hailong Shu, Jing-Feng Li
Summary: Environmentally friendly BiFeO3 capacitors with enhanced energy storage performance were designed and prepared in this study by improving ionic bonding and relaxor behavior. The multilayer capacitors achieved high BDS, low P-r, and large P-max simultaneously, leading to excellent energy storage density and efficiency.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Ying-Hao Zhao, Zhi-Hang Shan, Wei Zhou, Rui Zhang, Jun Pei, He-Zhang Li, Jing-Feng Li, Zhen-Hua Ge, Yuan-Bing Wang, Bo-Ping Zhang
Summary: The study demonstrates that Bi-Se co-doping can significantly enhance the thermoelectric properties of copper sulfides by introducing extra electrons and multiscale defects to reduce thermal conductivity, resulting in a higher ZT value compared to pure copper sulfides. This is of great importance for the development of high-performance thermoelectric materials.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Yu-Cheng Tang, Yang Yin, Ai-Zhen Song, Huan Liu, Rui Zhang, Shi-Jie Zhong, He-Zhang Li, Bo-Ping Zhang
Summary: A one-step preparation technology is developed to prevent the formation of Bi25FeO39 and Bi2Fe4O9 impurities and achieve excellent piezoelectric performance in BiFeO3-xBaTiO(3) ceramics.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Yu-Cheng Tang, Yang Yin, Ai-Zhen Song, He-Zhang Li, Bo -Ping Zhang
Summary: Remarkably stable electrical properties are achieved in 0.7Bi(1+x)FeO3-0.3BaTiO3 ceramics prepared by one-step process, exhibiting good stability and processability within a certain range of composition and sintering temperature. This method avoids the thermodynamically unstable region of BiFeO3 and prevents the formation of Bi25FeO39 and/or Bi2Fe4O9 impurities, greatly improving the robustness of composition and processing.
JOURNAL OF MATERIOMICS
(2023)
Article
Multidisciplinary Sciences
Rui-Ting Gao, Nhat Truong Nguyen, Tomohiko Nakajima, Jinlu He, Xianhu Liu, Xueyuan Zhang, Lei Wang, Limin Wu
Summary: Here we demonstrate a strategy to enhance the photoelectrochemical performance of the BiVO4 photoanode in neutral electrolyte by in situ forming a NiB layer through the addition of nickel and borate species. The NiB/BiVO4 photoanode shows a high photocurrent density of 6.0 mA cm-2 at 1.23 VRHE and a photostability over 600 hours. The addition of Ni2+ inhibits the dissolution of NiB and improves the charge transfer, while borate species act as a promoter for catalyst activity. The synergy effect of both species suppresses charge recombination and photocorrosion of BiVO4.
Article
Chemistry, Physical
Shuai Cheng, Boping Zhang, Shengjie Ai, Hongbao Yu, Xin Wang, Jiahao Yang, Changrong Zhou, Jingtai Zhao, Guanghui Rao
Summary: The addition of Bi0.5Na0.5TiO3 in BiFeO3-BaTiO3 ceramics allows for the tuning of piezoelectric responses. By optimizing the composition, the ceramics show enhanced d33 and TC, making them potential candidates for lead-free piezoceramics at high temperatures.
JOURNAL OF MATERIOMICS
(2023)
Article
Chemistry, Multidisciplinary
Cang Yuan, Rui-Ting Gao, Lei Wang
Summary: A Fe@Ni-MOFs/BiVO4 photoanode with enhanced stability and photocurrent density is synthesized using a simple ultrasonic method. The Fe@Ni-MOFs transform into a homogeneous hydroxide layer during operation, exposing more active sites for OER reactions and improving the PEC performance.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Tong-Guang Dai, Yu-Cheng Tang, Le-Tian Xie, Hezhang Li, Xiao-Qi Gao, Aizhen Song, Jun Pei, Huan Liu, Bo-Ping Zhang
Summary: This paper reports the enhanced high-temperature piezoelectric properties of Bi(Zn0.5Ti0.5)O-3-modified BiFeO3-BaTiO3 ceramics prepared using a two-step sintering method. The addition of BZT inhibits grain growth, reduces leakage current, and induces a ferroelectric to relaxor transition. The optimized piezoelectric properties were achieved at x = 0.01 composition, with d(33) = 193 pC N-1, P-r = 20.6 μC cm(-2), T-C = 503 °C, and k(p) = 36%, due to the synergistic effect of an appropriate C-R/C-PC ratio, improved insulation, and good polarization performance. These findings demonstrate the potential application of lead-free piezoceramics at high temperatures.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Ting Tang, Dong Liu, Qi Wang, Lei Zhao, Bo-Ping Zhang, He Qi, Li-Feng Zhu
Summary: The practical applications of dielectric capacitors have been hindered by challenges of remanent polarization and breakdown strength. By using heterovalent ion substitution engineering along with MLCC technology, high energy storage capabilities, efficiency, and density can be achieved in dielectric capacitors.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Jiamin Li, Rui-Ting Gao, Xianhu Liu, Xueyuan Zhang, Limin Wu, Lei Wang
Summary: In this paper, a facile strategy is reported to achieve HER electrocatalytic activity in neutral media on NiFe LDH by control of the water dissociation active sites. The catalyst exhibits low overpotential and significant long-term durability, which is of great significance for hydrogen production in neutral conditions.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Hao Wang, Rui-Ting Gao, Nhat Truong Nguyen, Jinwei Bai, Shijie Ren, Xianhu Liu, Xueyuan Zhang, Lei Wang
Summary: This study reports a feasible method to stabilize photoelectrochemical (PEC) devices using CoFe-dispersed polyacrylamide (PAM) hydrogel as a transparent protector. The PAM hydrogel network improves the loading of co-catalysts and enhances the electron density of reaction active sites, resulting in improved PEC performance and stability. By tuning the polymerization network, quasi-solid-state electrolytes are successfully utilized in PEC, providing effective charge transport and good water storage.
Article
Chemistry, Physical
Mingze Gao, Nhat Truong Nguyen, Rui-Ting Gao, Xianhu Liu, Xueyuan Zhang, Lei Wang
Summary: This study demonstrates the decoration of platinum single atoms (SAs) on hybrid crystalline/amorphous CoFe LDH and evaluates the role of SAs in the separation and transport of photogenerated charge carriers in the photoelectrode. The embedding of platinum SAs in the CoFe LDH structure modulates its electronic structure. The catalyst with single atoms of platinum enables effective charge transfer and suppresses charge recombination in the BiVO4 photoelectrode. The Pt/AC-CoFe/BiVO4 with SAs exhibits excellent photoelectrochemical performance, achieving a current density of 5.14 mA cm-1 at 1.23 VRHE under one sun illumination and maintaining stability for 20 hours.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Multidisciplinary Sciences
Rui-Ting Gao, Lijia Liu, Yanbo Li, Yang Yang, Jinlu He, Xianhu Liu, Xueyuan Zhang, Lei Wang, Limin Wu
Summary: By dispersing Ru and P diatomic sites onto hematite, an efficient photoelectrode was constructed using the concept of correlated single-atom engineering, resulting in improved charge carrier transportation dynamics and increased efficiency for photoelectrochemical water splitting.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Materials Science, Multidisciplinary
Xiao-Xiao Zhou, Yu-Cheng Tang, He-Zhang Li, Yi-Jin Hao, Meng-Ping Xue, Jun Pei, Xiao-Yan Peng, Bo-Ping Zhang
Summary: Adding BiAlO3 to BF-BT ceramics improves their insulation and piezoelectric performance, making them more suitable for high temperature applications.
