Surface & Coatings Technology最新文献_第3页

Green hydrogen production by an improved photoelectrochemical process with Ga-doped ZnO photoanodes on stainless steel substrates 不锈钢衬底上掺杂ga的ZnO光电阳极的改进光电化学工艺的绿色制氢

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-09 DOI: 10.1016/j.surfcoat.2026.133180

Sumeyya Ayca , Ibrahim Dincer

This study analyzes hydrogen production using photoelectrochemical (PEC) water splitting methods for Ga-doped ZnO electrodes coated on stainless steel. Physical electrochemistry, electrochemical impedance, hydrogen production, X-ray diffraction (XRD), and scanning electron microscopy (SEM) analyses are performed on uncoated, undoped ZnO-coated, and Ga-doped ZnO-coated electrodes. The parameters of the best-coated electrode obtained by chronoamperometry (CA) analysis are as follows: the electrode is immersed in a dip-coating bath for 4 s, is coated five times, and has a doping ratio of 1%. The Tafel slope obtained from the Tafel graph of the 1% Ga-doped ZnO electrode is 0.15 V/dec, and the change in current density is 1.05 × 10⁻⁷ A/cm². According to the electrochemical impedance spectroscopy (EIS) data, the solution resistance (Rs), polarization resistance (Rp), and constant phase element (CPE) of the 1% Ga-doped ZnO electrode are 0.4862 Ω·cm², 0.0785 Ω·cm², and 2.031 × 10⁻³ Ω⁻¹·s·cm⁻², respectively. The slope value obtained from the Mott–Schottky graph is also 3.45 × 10⁻⁴. The hydrogen production rate obtained from CA analysis over a half-hour period is 6 ml/cm². The energy efficiency is 2.3%, the exergy efficiency is 2.36%, and the applied bias photon-to-current efficiency (ABPE) is 0.75%. This study demonstrates higher hydrogen evolution reaction (HER) activity and overall efficiency than comparable studies in the literature. This study is the first in the literature to illustrate the dip-coating of Ga-doped ZnO electrodes onto stainless steel, the optimization of coating number and duration parameters, and the reporting of direct hydrogen production quantities. Thus, the study fills a gap in the literature in terms of both methodological innovation and performance, offering an applicable and scalable approach for sustainable hydrogen production.

本研究分析了在不锈钢表面涂覆ga掺杂ZnO电极的光电化学水裂解制氢方法。物理电化学、电化学阻抗、产氢、x射线衍射（XRD）和扫描电子显微镜（SEM）对未涂层、未掺杂zno涂层和ga掺杂zno涂层电极进行了分析。通过计时安培法（CA）分析得到的最佳包覆电极参数为：电极在浸渍镀液中浸泡4 s，包覆5次，掺杂率为1%。1% ga掺杂ZnO电极的Tafel斜率为0.15 V/dec，电流密度变化量为1.05 × 10−7 A/cm2。根据电化学阻抗谱（EIS）数据，1% ga掺杂ZnO电极的溶液电阻（Rs）、极化电阻（Rp）和恒相元（CPE）分别为0.4862 Ω·cm2、0.0785 Ω·cm2和2.031 × 10−3 Ω−1·s·cm−2。由Mott-Schottky图得到的斜率值也为3.45 × 10−4。半小时内CA分析得到的产氢率为6ml /cm2。能量效率为2.3%，火用效率为2.36%，外加偏置光子电流效率（ABPE）为0.75%。与文献中类似的研究相比，本研究显示出更高的析氢反应（HER）活性和总体效率。本研究在文献中首次阐述了将ga掺杂ZnO电极浸涂在不锈钢上，优化了涂层数量和持续时间参数，并报告了直接产氢量。因此，该研究在方法创新和性能方面填补了文献中的空白，为可持续制氢提供了一种适用且可扩展的方法。

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引用次数: 0

Wear and corrosion behavior of AISI 420 stainless steel coated with PVD AlCrN PVD AlCrN涂层AISI 420不锈钢的磨损和腐蚀行为

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-09 DOI: 10.1016/j.surfcoat.2026.133182

Eugenia L. Dalibón , Andrea Abreu-García , A. Justina Maskavizan , Javier Izquierdo , Ricardo M. Souto , Sonia P. Brühl

PVD AlCrN coatings are extensively used to improve the steel performance in severe wear and corrosion conditions. In this study, AISI 420 martensitic stainless steel was coated with a commercial AlCrN coating (Alcrona®, Oerlikon Balzers). Prior to deposition, the steel was plasma nitrided for 5 h in a semi-industrial facility. Surface characterization was conducted by X-ray diffraction (XRD), nanoindentation, microhardness, optical microscopy, and scanning electron microscopy coupled with focus ion beam milling (SEM-FIB). The long-term corrosion behavior was analyzed using Salt Spray test, open circuit potential and electrochemical impedance spectroscopy (EIS) measurements. Single and duplex coating systems were studied and compared with the uncoated systems, plasma nitrided steel and quenched & tempered steel. The coating thickness was approximately 4 μm, while the thickness of the nitrided compound layer was between 12 and 13 μm, with a nitriding penetration depth of 28 μm. The nitriding pretreatment enhanced adhesion of the coating in the duplex system. AlCrN significantly improved wear resistance of the substrates in Pin on disk tests under Hertzian pressures higher than 1 GPa. The coating was hard enough to withstand the sand for both coated systems in abrasive wear tests. It was not worn through in both type of wear tests, so nitriding treatment had no influence in wear resistance. In the salt spray chamber, the nitrided sample experienced homogeneous distribution of pits rather than localized pitting corrosion, whereas the samples with the AlCrN coating showed good protection. The AlCrN-coated samples exhibited barrier properties immediately after immersion; however, electrolyte penetration through pores and defects in the chloride-containing medium compromised their long-term corrosion resistance, especially for previously nitrided substrates.

PVD AlCrN涂层广泛用于改善钢在严重磨损和腐蚀条件下的性能。在这项研究中，AISI 420马氏体不锈钢涂上了一层商用AlCrN涂层（Alcrona®，欧瑞康巴尔查斯）。在沉积之前，钢在半工业设备中等离子体氮化5小时。采用x射线衍射（XRD）、纳米压痕、显微硬度、光学显微镜、扫描电镜和聚焦离子束铣削（SEM-FIB）对表面进行表征。通过盐雾试验、开路电位和电化学阻抗谱（EIS）测量分析了长期腐蚀行为。研究了单涂层和双涂层体系，并与未涂层体系、等离子体氮化钢和调质钢进行了比较。涂层厚度约为4 μm，渗氮层厚度在12 ~ 13 μm之间，渗氮深度为28 μm。渗氮预处理提高了涂层在双相体系中的附着力。在高于1 GPa的赫兹压力下，AlCrN显著提高了Pin on disk试验中衬底的耐磨性。在磨料磨损测试中，涂层的硬度足以承受两种涂层系统的沙子。在两种类型的磨损试验中都没有发生磨损，因此氮化处理对耐磨性没有影响。在盐雾室中，氮化后的样品出现了均匀分布的点蚀而不是局部的点蚀，而镀有AlCrN涂层的样品则表现出良好的保护作用。alcrn包覆的样品在浸泡后立即表现出屏障性能；然而，电解质通过含氯化物介质中的孔隙和缺陷的渗透会损害其长期耐腐蚀性，特别是对先前氮化的衬底。

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引用次数: 0

Microstructure evolution and tribological properties of plasma sprayed FeCoNiCrMo-TiX composite coatings 等离子喷涂FeCoNiCrMo-TiX复合涂层的组织演变及摩擦学性能

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-08 DOI: 10.1016/j.surfcoat.2026.133173

Yi Wang, Yonggang Guo, Qing Zhang, Xinchao Wang, Zhongpu Wang, Zichao Guo, Dongjin Cui

As the core component of the flour mill, the grinding roller has a significant impact on the flour quality and processing efficiency. Currently, the wear resistance of grinding rollers is primarily enhanced through alloy composition optimization and heat treatment strengthening, however, the improvement achieved by these methods remains limited. In this study, based on the solid solution strengthening and grain refinement effects of Mo and Ti in the alloy layer of the grinding roller surface, FeCoNiCrMo-TiC, FeCoNiCrMo-TiB₂, and FeCoNiCrMo-TiN coatings were prepared using plasma spraying. The microstructure, mechanical and tribological properties of the coatings were comprehensively characterized using XRD, XPS, SEM, EDS, microhardness testing, universal testing machine, and wear resistance testing. The results indicate that all coatings consisted of ceramic particles and FCC and BCC matrix solid solution phases. Compared with the FeCoNiCrMo coating, the FeCoNiCrMo-TiC coating exhibited a porosity reduction of 84%, while its hardness and bonding strength increased by 38% and 51%, respectively. These improvements are primarily attributed to the grain refinement and interfacial strengthening induced by TiC. Furthermore, compared with the substrate material, the friction coefficients of FeCoNiCrMo-TiC, FeCoNiCrMo-TiB₂, and FeCoNiCrMo-TiN coatings decreased by 18%, 9%, and 3%, respectively, and the corresponding wear rates were reduced by 33%, 23%, and 17%. Comprehensive analysis indicate that the FeCoNiCrMo-TiC composite coating possesses excellent tribological properties, mainly due to the synergistic effect of multiple hardening and strengthening mechanisms resulting from the addition of TiC ceramic particles, with wear mechanisms of abrasive wear and oxidative wear.

磨辊作为磨粉机的核心部件，对面粉的品质和加工效率有着重要的影响。目前，磨削辊的耐磨性主要通过优化合金成分和热处理强化来提高，但这些方法的提高效果有限。本研究基于磨辊表面合金层中Mo和Ti的固溶强化和晶粒细化效果，采用等离子喷涂法制备了FeCoNiCrMo-TiC、FeCoNiCrMo-TiB₂和FeCoNiCrMo-TiN涂层。采用XRD、XPS、SEM、EDS、显微硬度测试、万能试验机和耐磨性测试等手段对涂层的微观结构、力学性能和摩擦学性能进行了全面表征。结果表明，所有涂层均由陶瓷颗粒、FCC和BCC基体固溶体相组成。与FeCoNiCrMo涂层相比，FeCoNiCrMo- tic涂层的孔隙率降低了84%，硬度和结合强度分别提高了38%和51%。这些改善主要归因于TiC引起的晶粒细化和界面强化。此外，与衬底材料相比，FeCoNiCrMo-TiC、feconicrmo - tib2和FeCoNiCrMo-TiN涂层的摩擦系数分别降低了18%、9%和3%，相应的磨损率分别降低了33%、23%和17%。综合分析表明，FeCoNiCrMo-TiC复合涂层具有优异的摩擦学性能，主要是由于TiC陶瓷颗粒的加入导致了多种硬化强化机制的协同作用，其磨损机制为磨粒磨损和氧化磨损。

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引用次数: 0

Investigation on plasma nitriding and nitrocarburizing of a continuous cooling bainitic steel 连续冷却贝氏体钢等离子体渗氮和氮碳共渗的研究

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-07 DOI: 10.1016/j.surfcoat.2026.133171

João Vitor Piovesan Dalla NORA , Douglas Rodrigues de RODRIGUES , Morvan da Silva FRANCO , Vinicius Waechter DIAS , Fernando Michelon MARQUES , Rafael Menezes NUNES , Alexandre da Silva ROCHA

Plasma nitriding of continuous cooling bainitic steel DIN 18 MnCrSiMo6–4 has been previously studied to enhance its surface properties without compromising core hardness. However, the potential of plasma nitrocarburizing for this specific advanced steel remains largely unexplored, despite its promise of superior tribological performance. In this context, this article aims to evaluate the response to plasma nitrocarburizing of DIN 18 MnCrSiMo6–4 continuously cooled bainitic steel compared to plasma nitriding. Plasma thermochemical treatments were carried out in N₂ - H₂ - CH₄ atmosphere, varying CH₄ content from 0 vol%, for plasma nitriding, to 3 and 5 vol% for plasma ferritic nitrocarburizing. The N₂ content was fixed at 75 vol% and H₂ was used in balance for all treatments. Microstructure, roughness, hardness, phase and micro-abrasive wear resistance of the samples were investigated after plasma treatments. The experimental findings indicate a decrease in the thickness of the white layer, and an enhancement in surface hardness and roughness as the CH₄ content increases. Furthermore, there is an increased formation of Fe₂₃N phase, which correlates with an elevated concentration of CH₄ in the system. Plasma nitrocarburizing with 3 vol% CH₄ exhibited reduced worn volume and minor crater depths than white layer thickness for the longest micro-abrasive tests. Plasma nitrocarburizing significantly improved wear resistance while preserving core hardness of DIN 18MnCrSiMo6–4 bainitic steel surface properties.

连续冷却贝氏体钢DIN 18mncrsimo6 - 4的等离子体渗氮已经被研究，以提高其表面性能而不影响核心硬度。然而，等离子体氮碳共渗对这种特殊高级钢的潜力仍未得到充分开发，尽管它具有优越的摩擦学性能。在此背景下，本文旨在评估din18 MnCrSiMo6-4连续冷却贝氏体钢与等离子渗氮相比对等离子氮化的响应。等离子体热化学处理在N2 - H2 - CH4气氛中进行，CH4含量从0 vol%（等离子体渗氮）到3 vol%和5 vol%（等离子体铁素体氮碳共渗）。N2含量固定为75 vol%，各处理均平衡使用H2。对等离子体处理后试样的显微组织、粗糙度、硬度、物相及微磨粒耐磨性进行了研究。实验结果表明，随着CH4含量的增加，白层厚度减小，表面硬度和粗糙度增大。此外，Fe23N相的形成增加，这与体系中CH4浓度的升高有关。3 vol% CH4等离子体氮碳共渗在最长微磨粒试验中表现出比白层厚度更小的磨损体积和较小的坑深。等离子体氮碳共渗处理显著提高了DIN 18MnCrSiMo6-4贝氏体钢的耐磨性，同时保持了钢芯硬度的表面性能。

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引用次数: 0

Osteoconductive composite coating of gelatin/β-TCP on Mg-Zn-Ca alloy using AC-EPD for bone regeneration 明胶/β-TCP在Mg-Zn-Ca合金上的骨导电复合涂层

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-07 DOI: 10.1016/j.surfcoat.2026.133166

Manisha Behera , Agnès Denys , Fabrice Allain , Cosmin Gruescu , Annabel Braem , Rajashekhara Shabadi

Surface modification of magnesium (Mg) alloys offers a promising strategy to overcome their intrinsically rapid degradation and mechanical instability in physiological environments. This will address the key challenges in orthopedic and tissue engineering implants. In this study, we coated as-cast Mg-0.3Zn-0.2Ca (CZ03) alloy with an osteoconductive composite of gelatin and β-tricalcium phosphate (β-TCP) using alternating current electrophoretic deposition (AC-EPD) to address these challenges. Optimized AC-EPD parameters yielded uniform, crack-free coatings with an average thickness of ∼8 μm. FTIR analysis indicated structural interactions within the gelatin matrix during AC-EPD, consistent with enhanced coating stability without external crosslinkers. in simulated body fluid (SBF) revealed that the composite coating significantly reduced the corrosion rate by 80 % and produced a positive shift in corrosion potential, compared to the uncoated alloy. In vitro studies with MC3T3-E1 cells demonstrated significantly improved cell viability and proliferation over 6 days, while RAW-Blue™ macrophage assays revealed reduced secreted embryonic alkaline phosphatase (SEAP) activity, suggesting favourable immunomodulation. Overall, AC-EPD–derived gelatin/β-TCP coatings enhanced corrosion resistance, cytocompatibility, and immunomodulatory performance of Mg alloys, supporting their potential as biodegradable orthopedic implants.

镁合金的表面改性为克服其在生理环境中固有的快速降解和机械不稳定性提供了一种很有前途的策略。这将解决骨科和组织工程植入物的关键挑战。在本研究中，我们使用交流电电泳沉积（AC-EPD）技术将明胶和β-磷酸三钙（β-TCP）的骨导电复合材料涂覆在铸态Mg-0.3Zn-0.2Ca （CZ03）合金上，以解决这些问题。优化后的AC-EPD涂层均匀、无裂纹，平均厚度为~ 8 μm。FTIR分析表明，在AC-EPD过程中，明胶基质内部存在结构相互作用，这与没有外部交联剂的情况下涂层稳定性增强相一致。在模拟体液（SBF）中，与未涂覆合金相比，复合涂层显著降低了80%的腐蚀速率，并产生了正的腐蚀电位变化。MC3T3-E1细胞的体外研究表明，在6天内，MC3T3-E1细胞的活力和增殖能力显著提高，而RAW-Blue™巨噬细胞实验显示，分泌的胚胎碱性磷酸酶（SEAP）活性降低，表明有利的免疫调节。总的来说，ac - epd衍生明胶/β-TCP涂层增强了镁合金的耐腐蚀性、细胞相容性和免疫调节性能，支持了镁合金作为可生物降解骨科植入物的潜力。

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引用次数: 0

Ultrasonic-assisted laser cladding of CoCrFeMnNiSi1.6-WC3 composite coatings: Frequency effect 超声辅助激光熔覆CoCrFeMnNiSi1.6-WC3复合涂层：频率效应

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-07 DOI: 10.1016/j.surfcoat.2026.133153

Tianxiang Lin , Meiyan Feng , Guofu Lian , Zhigang Zeng , Changrong Chen

To investigate the impact of ultrasonic energy on microstructural evolution, mechanical performance, and corrosion behavior in high-entropy alloy composites synthesized via laser cladding, CoCrFeMnNiSi1.6-WC3 coatings were deposited on AISI 1045 steel through an ultrasound-enhanced laser processing method. Results demonstrate that the phase composition of the coatings remains unchanged under varying ultrasonic frequencies, consistently comprising FCC, BCC, silicide, and carbide phases. As the ultrasonic frequency increases, the coating microstructure is significantly refined. At 15 kHz, dendritic structures exhibit the finest morphology and most uniform distribution. Under ultrasonic excitation, WC refractory particles were efficiently fragmented and homogeneously dispersed throughout the matrix, thereby playing a pivotal role in enhancing the coating's overall performance. The microhardness of the coatings initially increases with ultrasonic frequency, reaching a maximum of 876.2 HV0.5 at 15 kHz—302 % higher than that of the substrate and 12 % higher than that of the non-ultrasonically treated W0U0 coating. Similarly, wear resistance first improves and then declines with frequency. At 15 kHz, the friction coefficient and wear rate reach their lowest values—0.543 and 0.02247mm³, respectively—representing reductions of 7.97 % and 14.7 % compared to the W0U0 coating. Increasing ultrasonic frequency markedly mitigates both adhesive and abrasive wear, while simultaneously stabilizing the friction coefficient fluctuations. Corrosion resistance also shows a non-monotonic trend with frequency. At an ultrasonic frequency of 15 kHz, the coating demonstrates the peak corrosion potential (−0.402 V) alongside the minimal corrosion current density (5.516 × 10⁻⁸ A/cm²), signifying the development of a highly stable, dense passive film that affords superior corrosion resistance. These findings offer both experimental evidence and theoretical insight into the optimization of high-entropy alloy composite coatings via ultrasound-assisted laser cladding.

为了研究超声能量对激光熔覆高熵合金复合材料显微组织演变、力学性能和腐蚀行为的影响，采用超声增强激光加工方法在AISI 1045钢表面沉积CoCrFeMnNiSi1.6-WC3涂层。结果表明，在不同的超声频率下，涂层的相组成保持不变，基本由FCC相、BCC相、硅化相和碳化物相组成。随着超声频率的增加，涂层组织明显细化。在15 kHz时，枝晶结构表现出最精细的形态和最均匀的分布。在超声激励下，WC耐火颗粒在基体中被有效破碎和均匀分散，对提高涂层的整体性能起着关键作用。随着超声频率的增加，涂层的显微硬度开始升高，在15 khz时达到最大值876.2 HV0.5，比基体高302%，比未超声处理的W0U0涂层高12%。同样，耐磨性随频率的增加先提高后下降。在15 kHz时，摩擦系数和磨损率分别为0.543和0.02247mm3，与W0U0涂层相比分别降低了7.97%和14.7%。增加超声频率可显著减轻粘着磨损和磨粒磨损，同时稳定摩擦系数波动。耐蚀性随频率变化也呈现非单调趋势。在15 kHz的超声波频率下，涂层显示出峰值腐蚀电位（- 0.402 V）和最小腐蚀电流密度（5.516 × 10 - 8 A/cm2），这表明开发出了一种高度稳定、致密的钝化膜，具有优异的耐腐蚀性。这些发现为超声辅助激光熔覆高熵合金复合涂层的优化提供了实验依据和理论见解。

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引用次数: 0

Corrosion and wear resistance properties of monel alloy-copper composites coating fabricated by arc-spraying process 电弧喷涂蒙乃尔合金-铜复合镀层的耐蚀耐磨性能

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-07 DOI: 10.1016/j.surfcoat.2026.133170

Xun Ni , Jinbiao Bai , Zhenzhuang Zhao , Ruixiong Zhai , Yuwei Liang , Jiakuan Chen , Taihong Huang , Qing Li , Dehao Kong , Peng Song

To enhance the corrosion and wear resistance of components such as heat-exchanger tubes in seawater desalination systems, this study prepared a copper-based Monel alloy composite coating on an 08Al steel substrate using arc-spraying technology. An innovative short-process route consisting of spraying-annealing-cold rolling was employed. The microstructure, microhardness, electrochemical corrosion behavior, and tribological properties of the as-sprayed, annealed, and cold-rolled coatings were systematically examined. The findings show that the rolled coating developed a compact and uniform microstructure, with porosity reduced to only 0.09%. Heat treatment promoted the formation of a γ-(Cu,Ni) solid solution within the coating and generated a Fe-rich interdiffusion zone (IDZ) at the interface. This resulted in metallurgical bonding between the coating and substrate, substantially improving both bonding strength and microhardness, which reached a maximum of 118 HV. Electrochemical measurements further revealed that the rolled Cu-Monel coating exhibited the best corrosion resistance in a 3.5 wt% NaCl solution, presenting the most positive corrosion potential (−0.6528 V), the lowest corrosion current density (2.4161 μA/cm²), and the highest charge-transfer resistance (16,227 Ω·cm²). In dry sliding wear tests, the composite coating showed a reduced wear rate and a more stable frictional response than the pure copper (Cu) coating. Overall, this work offers new insights and experimental support for the development of Cu-based composite coatings with superior combined corrosion and wear resistance.

为了提高海水淡化系统中换热器管等部件的耐蚀性和耐磨性，本研究采用电弧喷涂技术在08Al钢基体上制备了铜基蒙乃尔合金复合涂层。采用了一种创新的由喷涂-退火-冷轧组成的短工艺路线。系统地研究了喷涂、退火和冷轧涂层的显微组织、显微硬度、电化学腐蚀行为和摩擦学性能。结果表明：轧制后的涂层组织致密均匀，孔隙率降至0.09%；热处理促进了涂层内γ-(Cu,Ni)固溶体的形成，并在界面处形成富铁互扩散区（IDZ）。这导致涂层和基体之间的冶金结合，大大提高了结合强度和显微硬度，最高可达118 HV。电化学测试进一步表明，轧制后的Cu-Monel涂层在3.5 wt% NaCl溶液中具有最佳的耐蚀性，腐蚀电位最高（- 0.6528 V），腐蚀电流密度最低（2.4161 μA/cm2），电荷转移电阻最高（16,227 Ω·cm2）。在干滑动磨损试验中，复合涂层比纯铜涂层表现出更低的磨损率和更稳定的摩擦响应。总的来说，这项工作为开发具有优异耐腐蚀和耐磨性的cu基复合涂层提供了新的见解和实验支持。

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引用次数: 0

Multifunctional coating of PEDOT ZNT on zirconium implants for improved corrosion resistance and osteogenic activity PEDOT ZNT在锆植入体上的多功能涂层提高了其耐腐蚀性和成骨活性

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-07 DOI: 10.1016/j.surfcoat.2026.133165

Sushmi Shree Ganesh Babu , Soumyakanti Adhikari , Selvamurugan Nagarajan , Rajendran Nallaiyan

Orthopaedic implants require surface modifications that enhance both corrosion resistance and bioactivity. In this study, we report a multifunctional coating of poly(3,4-ethylenedioxythiophene) (PEDOT) integrated with zirconia nanotubes (ZNTs) on zirconium substrates, achieved through electrochemical anodization and electropolymerization. Comprehensive surface characterization (HR-SEM, ATR-FTIR, XRD, XPS) confirmed the successful integration of PEDOT and ZNTs. Electrochemical analysis, including scanning electrochemical microscopy (SECM) and potentiodynamic polarization, demonstrated superior corrosion resistance of the PEDOT-ZNT coating compared to bare zirconium and ZNT. In vitro studies revealed an enhanced osteogenic potential, as indicated by increased cell viability, proliferation, and biomineralization in Hanks' solution, along with upregulated expression of osteogenic markers ALP and Type I collagen. Additionally, PEDOT-ZNT exhibited significant antibacterial activity against common pathogens. These results demonstrate that PEDOT-coated ZNTs confer multifunctional surface properties, combining corrosion protection, osteogenic promotion, and antibacterial activity, positioning them as a promising strategy for next-generation orthopaedic implants.

骨科植入物需要表面修饰，以增强抗腐蚀性和生物活性。在这项研究中，我们报道了一种聚（3,4-乙烯二氧噻吩）（PEDOT）与氧化锆纳米管（ZNTs）集成的多功能涂层，通过电化学阳极氧化和电聚合在锆衬底上。综合表面表征（HR-SEM, ATR-FTIR， XRD， XPS）证实了PEDOT与ZNTs的成功集成。电化学分析，包括扫描电化学显微镜（SECM）和动电位极化，表明PEDOT-ZNT涂层比裸锆和ZNT具有更好的耐腐蚀性。体外研究显示，汉克斯溶液中细胞活力、增殖和生物矿化增加，以及成骨标志物ALP和I型胶原蛋白的表达上调，表明成骨潜力增强。此外，PEDOT-ZNT对常见病原菌具有明显的抗菌活性。这些结果表明，pedot涂层的ZNTs具有多功能表面特性，结合了防腐，成骨促进和抗菌活性，将其定位为下一代骨科植入物的有前途的策略。

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引用次数: 0

Microstructural tailoring of Cr–Mn–Mo nitrides through Si and Y alloying 通过Si和Y合金化制备Cr-Mn-Mo氮化物的显微组织

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-06 DOI: 10.1016/j.surfcoat.2026.133155

Lukáš Vrána , Christian Gutschka , Matej Fekete , Zsolt Czigány , Helmut Riedl , Tatiana Pitoňáková , Katalin Balázsi , Pavel Souček

This study investigates Si and Y alloying effects on microstructure and mechanical properties of Cr–Mn–Mo-based high- and medium-entropy nitride thin films fabricated by reactive DC magnetron sputtering, employing ab initio calculations and experimental analysis. Ab initio results show the unalloyed Cr–Mn–Mo–N system forms a stable fcc structure with negative formation energy, minimally affected by N vacancies. Alloying with Si, Y, or both further reduces formation energy, enhancing thermodynamic stability, especially at high Y concentrations. However, alloying comes with increased unit cell distortion, destabilising the crystal structure. Experiments reveal that Si and Y promote N incorporation, but complete stoichiometric metal-to-nitrogen ratios are not achieved, yielding N-vacant films. Structural analyses confirm the formation of a single-phase fcc solid solution, with lattice expansion and crystallite size refinement induced by increasing alloying concentrations. Atomic size mismatch is identified as the principal factor governing phase formation. Alloying enhances hardness without compromising elasticity, peaking at 20.5 GPa in Si-alloyed film due to nanocrystallinity, N incorporation, and strong nitride covalent bonding.

采用从头计算和实验分析的方法，研究了Si和Y合金化对反应性直流磁控溅射制备cr - mn - mo基高、中熵氮化薄膜的微观结构和力学性能的影响。从头算结果表明，非合金化Cr-Mn-Mo-N体系形成了稳定的fcc结构，形成能为负，受N空位的影响最小。与Si、Y或两者的合金化进一步降低了地层能量，增强了热力学稳定性，特别是在高Y浓度下。然而，合金化会增加晶胞畸变，破坏晶体结构的稳定性。实验表明，Si和Y促进了N的掺入，但没有达到完全的金属与氮的化学计量比，从而产生N空膜。结构分析证实了单相fcc固溶体的形成，随着合金浓度的增加，晶格膨胀和晶粒尺寸细化。原子尺寸不匹配被认为是控制相形成的主要因素。合金化在不影响弹性的情况下提高了硬度，由于纳米结晶度、N掺入和强氮化物共价键，硅合金薄膜在20.5 GPa时达到峰值。

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引用次数: 0

Study on the synergy of nitrogen-containing borate ester organomolybdenum additives combined with ZDDP 含氮硼酸酯类有机钼添加剂与ZDDP的协同作用研究

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-05 DOI: 10.1016/j.surfcoat.2026.133152

Hongping Qiu , Wenbin Hu , Jingzhou Liu , Longhai Li , Sifan Jiang , Keyi Bao , Sheng Han , Jincan Yan

In this study, two sulfur- and phosphorus-free nitrogen-containing borate ester-based organomolybdenum compounds (OBN-Mo-OBN and OBN-Mo) were synthesized, and the relationship between their molecular structures and tribological properties was systematically investigated. When combined with ZDDP, both compounds exhibited significant anti-wear and friction-reducing performance. Under high-load and high-speed conditions (294 N, 1450 rpm), the addition of 0.5 wt% OBN-Mo-OBN and 0.5 wt% ZDDP reduced wear volume by 97 % compared to base oil. To elucidate the underlying mechanism, a comprehensive suite of characterization techniques was employed, including energy-dispersive X-ray spectroscopy (EDS), white light interferometry (WLI), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). Surface analysis confirmed that the pronounced synergistic effect arises from the formation of a protective tribochemical reaction film composed of MoO₃, MoS₂, FeS, Fe₂(SO₄)₃, B₂O₃, and boron–nitrogen (BN) complexes.

本研究合成了两种无硫无磷含氮硼酸酯基有机钼化合物OBN-Mo- obn和OBN-Mo，并系统研究了其分子结构与摩擦学性能的关系。当与ZDDP结合时，两种化合物都表现出显著的抗磨和减摩性能。在高负荷和高速工况下（294 N, 1450 rpm），与基础油相比，添加0.5 wt% OBN-Mo-OBN和0.5 wt% ZDDP可减少97%的磨损量。为了阐明其潜在机制，采用了一套全面的表征技术，包括能量色散x射线光谱（EDS），白光干涉测量（WLI），扫描电子显微镜（SEM）和x射线光电子能谱（XPS）。表面分析证实，明显的协同效应是由MoO₃、MoS₂、FeS、Fe₂（SO₄）₃、B₂O₃和硼氮（BN）配合物组成的保护性摩擦化学反应膜的形成引起的。

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引用次数: 0