Journal of Manufacturing Processes
·
2024
·
IF 6.1
An Liu,Song Gao,Hailin Lu
To enhance the tribological properties and corrosion resistance of titanium alloys, this study proposes a novel tribological interface structure combining micro-arc oxidation ceramic coatings with MoSe 2 . Comprehensive analysis using X-ray diffractometry, profilometry, energy-dispersive spectroscopy, and scanning electron microscopy was conducted to evaluate the tribological characteristics of this structure under dry friction and liquid lubrication conditions. Electrochemical experiments assessed the corrosion resistance of the structure. The results indicated that under 3 N-2.5 cm/s, oil lubrication, the structure exhibited the best friction-reducing and lubricating performance, with the friction coefficient reduced by 75 %. The synergistic interaction between the low shear force MoSe 2 particles and the TiO 2 -rich ceramic coating formed a lubricating layer on the surface, thereby achieving reduced friction and enhanced wear resistance. Additionally, this structure demonstrated excellent corrosion resistance. This study provides valuable insights for integrating micro-arc oxidation with new materials in engineering applications.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Yang Liu,Run Liu,Wenxian Nie,Leiting Yu,Shaoyuan Lyu,Qi Han,Yun Zhao,Minfang Chen
In this study, a composite coating of polycaprolactone layer and polydopamine-cyclodextrin (β-CD)/naringenin (NG) was prepared on the surface of a micro-arc oxidized (MAO) pretreated magnesium alloy by a two-step method. The findings demonstrate that the composite coating exhibits favorable corrosion resistance, biocompatibility, photo-thermal antimicrobial, and bone-enhancing characteristics. Compared with the MAO coating, the corrosion rate of the composite coating was significantly reduced from about 0.087 mm/y to 0.066 mm/y. The antimicrobial efficiency of the coating against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) under 808 nm laser irradiation was found to reach 93 % and 99 %, respectively. Furthermore, in vitro cytotoxicity assays, dead and live cell staining, and immunoblotting analysis showed that the coating exhibited favorable biocompatibility and osteogenic activity. This novel coating may have good application prospects in the treatment of osteoporosis-related fractures.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2023
·
IF 6.2
Chen Zhao,Xingwei Wang,Chuanpeng Li,Yu Liu,Shuang Sun,Shuangshuang Yang,Yuchen Sun,Zhenjun Peng,Qiangliang Yu,Meirong Cai,Bo Yu,Feng Zhou,Weimin Liu
Sodium dodecyl sulfate (SDS) and 8-Hydroxyquinoline (8-HQ) intercalated layered double hydroxides (LDH) sheets were in-situ formed in MAO layer to prepare a composite coating (CI@LDH-MAO) on AZ31 magnesium alloy . This composite coating demonstrates commendable anti-corrosion performance, primarily attributed to the formation of LDH sheets and insoluble Mg(HQ) 2 compounds. The electrochemical impedance modulus of the composite coating surpasses that of the MAO coating by three orders of magnitude after immersion of 360 h. Concurrently, the CI@LDH-MAO composite coating exhibits exemplary tribological properties, characterized by a friction coefficient of approximately 0.19 and a wear rate of (11.5 ± 1.5)× 10 −6 mm 3 /(N·m). This outstanding tribological performance can be ascribed to enhanced interaction of lubricants with the friction interface by 8-HQ and SDS anions.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Lei Wu,Kun Zhang,Qiuyan Ye,Yingjie Lv,Jiaqiao Li,Xiaoyan Guo,Yongnan Chen,Yiming Chen
Titanium alloys exhibit excellent mechanical properties, good corrosion resistance and biocompatibility, making they widely used in medical field. Nevertheless, their practical application is frequently constrained by bacterial infection and corrosion issues in physiological environments. To overcome these challenges, this study proposes a novel multifunctional strategy involving the incorporation of Ag + -loaded ZSM-5 zeolites into a micro-arc oxidated (MAO) coating on the surface of titanium alloy to fabricate Ag/ZSM-5@MAO-Ti composite coating. The microstructure, mechanical properties, and functional characteristics of the coating were systematically characterized. Analysis confirmed that Ag/ZSM-5 were evenly dispersed within the MAO coating while preserving the crystal structure intact. By leveraging the mechanical interlocking effect, the particles were securely retained within the micropores of the MAO layer after in-situ hydrothermal secondary growth. The composite coating exhibited exceptional adhesion to the titanium alloy substrate, with an average bond strength of 64 N. Owing to the inherent hydrophilicity of zeolites, the composite coating demonstrated significantly enhanced hydrophilicity with a contact angle of 12.9±0.7°. Antimicrobial tests results revealed that the coating achieved an inhibition rate of more than 99.99% against Escherichia coli (E. coli), and the sustained release of Ag⁺ ensures long-term antimicrobial efficacy. Furthermore, the composite coating displayed superior corrosion resistance in phosphate buffer solution (PBS). In summary, the Ag/ZSM-5 modified MAO coating substantially enhances the antimicrobial properties and corrosion resistance of titanium alloy, offering a promising strategy for the development of advanced medical devices.
研究领域:
材料科学
·
生物医学工程
·
表面工程
·
纳米技术
·
腐蚀科学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
An Liu,Ning Chen,Ping Liu,Geng Zhang,Xiyao Liu,Chao Ma,Song Gao
For realizing friction reduction and wear resistance across a wide temperature range, this study proposes a novel interface structure combining micro-arc oxidation (MAO) coatings on titanium alloy with MoSe 2 nanoparticles. Focus on investigating the tribological behavior of this structure across a wide temperature range (RT–500 °C) and its response to temperature. Through detailed characterization, the friction-reducing and lubricating mechanisms during wear were elucidated. The results demonstrate that this structure consistently exhibits friction reduction and lubrication capabilities, with low-shear MoSe 2 particles and molybdenum oxides enhancing the micro-pocket structure. This research provides valuable insights for developing integrated self-lubricating interfaces and improving the high-temperature tribological performance of MAO coatings.
研究领域:
材料科学
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Qiwen Yong,Yan Liu,Yao Luo,Liang Wu,Zhi-Hui Xie
Micro-arc oxidation (MAO) enhances the corrosion resistance of magnesium alloys, but the resulting porous property of the MAO layer facilitates the ingress of corrosive media. This study presents a synergistic sealing treatment using cerium nitrate and stearic acid under ambient conditions to improve MAO-treated magnesium alloy's corrosion resistance, durability, and hydrophobicity. The impact of varying immersion times in cerium nitrate solution on sealing morphologies was also assessed. Results indicate that the specimen with a two-hour immersion shows the fewest micrometer-sized pores, smallest pore sizes, and minimal microcracks. Further sealing treatment with stearic acid, the charge transfer resistance of composite coating ( R ct ) was 186 times greater than the unsealed MAO coating, reaching 24.6 MΩ cm 2 . Additionally, the corrosion current density j corr after 15 days of immersion was three orders of magnitude lower than that of the unsealed coating, down to 1.88 nA cm −2 . These findings introduce a novel strategy for sealing micro-arc oxidized magnesium alloys, highlighting a promising approach to enhance their corrosion resistance, durability, and hydrophobicity, expanding their potential applications.
研究领域:
材料科学
·
表面工程
·
防腐蚀技术
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2020
·
IF 3.784
Qiufeng Mo,Gemei Qin,Kui Ling,Xiaoyu Lv,Nannan Wang,Weizhou Li
Structural defects such as micro-pores and cracks generated during the micro-arc oxidation process can greatly reduce the corrosion resistance of the coating. This work proposed a method to improve the anti-corrosion property of the micro-arc oxidation (MAO) coating by layer-by-layer (LBL) assembling a polyurea layer on the surface of it. Organic silane (KH) and isophorone diisocyanate (IPDI) were self-assembled alternately on the MAO coating surface and formed a polyurea layer. The assembled layers were investigated using XPS , FTIR, EDS-SEM, EIS and polarization curves measurements. Three organic layers obtained couldn't be seen from SEM morphology. Whereas the XPS results showed the existence of polyurea layers with the disappearance of Al 2p signals and appearance of N 1s signals. The MAO coating surface was hydrophilic, and the contact angles of samples with odd-numbered layer (KH550 surface) were up to 95°, while the samples with even-numbered layer (IPDI surface) were about 87°, meaning that the silane and IPDI were successfully assembled on the MAO surface, improving the hydrophobicity of coating. The KH550/IPDI coating exhibited remarkably corrosion protection , and the corrosion resistance of the coating was maintained above 10 9 Ω·cm 2 after exposure in NaCl solution for 288 h. In addition, the self-corrosion current density was under 1.46 × 10 −9 mA·cm −2 after 288 h immersion, indicating that the KH550/IPDI coating would keep the anti-corrosion ability for longer time.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yan Xia,Zejie Zhu,Linrong Chang,Jianqing Zhang,Fahe Cao,Junxi Zhang
The degradation behavior of AZ91D magnesium alloy with micro-arc oxidation (MAO) coating in NaCl solutions was studied by scanning electrochemical microscopy (SECM). The investigation was carried out at SECM with 10 micron tip using ferrocenemethanol (FcMeOH) as the redox mediator in feedback mode. The variation of localized reactivity of the MAO coating are reflected by tip currents in SECM mapping images, and the generation and evolution of active site/sites on MAO coating are correlated to the concentration of Cl - in the solution and microstructure of the coating. With Cl - concentration increasing, the rate of generation of active sites is accelerated and meanwhile the reactivity of the active sites is enhanced. For the relatively thick and porous coating, there are lots of independent active sites incubating, generating and evolving on coating with the extension of immersion time. While the coating is relatively thin and smooth, the coexistence of slender and lower current peaks and pieces of active regions appears. The reactivity of the artificial line scratch and surrounding areas varied with the increase of immersion time, indicating that the generation, accumulation and dissolution of corrosion product affect the corrosion behavior of AZ91 alloy.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2026
·
IF 1.3
Jia Wang,Lin Gao,Chuanyao Dong,Kan Zhang
To enhance the service performance of titanium alloys for demanding high-end equipment applications, an h-BN/SiC-Ti-MAO composite coating was fabricated on Ti6Al4V via one-step micro-arc oxidation (MAO). Optimizing the SiC additive concentration offers an effective way to improve the overall performance of the composite coating in mechanical, tribological, oxidation resistance and anti-corrosion properties. The research results show that the coating prepared with 4 g/L SiC yielded superior multifunctional properties. It possessed a dense microstructure with the lowest porosity (6.45%), high hardness (712 HV) and excellent adhesion. This coating maintained a low friction coefficient of approximately 0.20 from RT to 5 0 0 ∘ C and exhibited the best oxidation resistance at 6 0 0 ∘ C, with a parabolic rate constant ( K P ) of 3 . 3 3 × 1 0 − 4 . Electrochemical tests in 3.5 wt.% NaCl solution further confirmed its optimal anti-corrosion, showing the lowest corrosion current density ( 3 . 3 2 5 × 1 0 − 9 A/cm 2 ) . In contrast, insufficient SiC concentration results in limited performance improvement of the composite coating, whereas excessive concentration introduces microstructural defects, ultimately degrading the overall performance. This study demonstrates that optimized h-BN/SiC co-doping represents an effective strategy for developing high-performance MAO protective coatings on titanium alloys.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yunfei Tang,Mengmeng Xiao,Tongtong Duo,Xiaowan Zhang,Ziyue Chen,Wei Wei
The abnormal expression of monoamine oxidase B (MAO-B) and the soluble oligomer (Aβo) formed by β-amyloid deposition play key roles in the pathogenesis of Alzheimer’s disease. However, the simultaneous detection of MAO-B and Aβo remains a huge challenge. Herein, a bimetallic core–shell probe ZIF-8 embedding rhodamine 6G (Au/Rh6G/Pd@ZIF-8) with peroxidase-like activity is designed to detect MAO-B and Aβo simultaneously. MAO-B catalyzes the substrate phenethylamine (PEA) to produce H2O2, which oxidizes thiamine with the catalysis of Au/Rh6G/Pd@ZIF-8 to produce a fluorescent product that emits a strong fluorescence at 440 nm. When Aβo is present in the system, due to the specific coordination between Aβo and Zn2+, the intact ZIF-8 structure collapses, leading to Rh6G release and fluorescence recovery. The simultaneous determination of MAO-B and Aβo by Au/Rh6G/Pd@ZIF-8 is realized. The results showed that the designed biosensor had high specificity and sensitivity, a wide detection range, and a low detection limit for MAO-B and Aβo simultaneous detection. Fluorescence signals for MAO-B and Aβo detection did not interfere with each other because they are excited separately, which provides more valuable data for the diagnosis of Alzheimer’s disease.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOORGANIC CHEMISTRY
·
2018
·
IF 3.929
Qi He,Jing Liu,Jin-Shuai Lan,Jiaoli Ding,Yongbing Sun,Yuanying Fang,Neng Jiang,Zunhua Yang,Liyuan Sun,Yi Jin,Sai-Sai Xie
A series of new coumarin-dithiocarbamate hybrids were designed and synthesized as multitarget agents for the treatment of Alzheimer’s disease. Most of them showed potent and clearly selective inhibition towards AChE and MAO-B. Among these compounds, compound 8f demonstrated the most potent inhibition to AChE with IC 50 values of 0.0068 μM and 0.0089 μM for eeAChE and hAChE, respectively. Compound 8g was identified as the most potent inhibitor to hMAO-B, and it is also a good and balanced inhibitor to both hAChE and hMAO-B (0.114 µM for hAChE; 0.101 µM for hMAO-B). Kinetic and molecular modeling studies revealed that 8g was a dual binding site inhibitor for AChE and a competitive inhibitor for MAO-B. Further studies indicated that 8g could penetrate the BBB and exhibit no toxicity on SH-SY5Y neuroblastoma cells. More importantly, 8g did not display any acute toxicity in mice at doses up to 2500 mg/kg and could reverse the cognitive dysfunction of scopolamine-induced AD mice. Overall, these results highlighted 8g as a potential multitarget agent for AD treatment and offered a starting point for design of new multitarget AChE/MAO-B inhibitors based on dithiocarbamate scaffold.
研究领域:
药理学
·
神经科学
·
药物化学
✓ 已验证
DOI
PubMed
高影响因子
DENTAL MATERIALS JOURNAL
·
2025
·
IF 1.9
Fengmin CHEN,Yuqi ZHOU,Yao FENG,Hongguang ZHU
To investigate the osteogenic potential of a novel composite coating —micro-arc oxidation combined with polydopamine and nanoclay (MAO-PDA-NC)— on titanium substrates, coatings were fabricated via micro-arc oxidation (MAO) and impregnation techniques. Pure titanium (TI) was the control, while MAO-PDA-NC-coated titanium functioned as the experimental specimen. After surface characterization, a 5 mm critical-sized calvarial defect model was established bilaterally in rat skulls. Titanium implants were randomly allocated to the defect sites, either uncoated or coated with MAO-PDA-NC. The regenerative response was assessed through micro-computed tomography, histological analysis, immunohistochemistry, and immunofluorescence. Results demonstrated that MAO-PDA-NC-modified titanium significantly enhanced new bone formation, exhibiting anti-inflammatory and regenerative properties. These characteristics show broad application prospects in the field of implant surface modification.
研究领域:
生物材料学
·
骨组织工程
·
口腔种植学
·
表面科学
·
再生医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）