Surface & Coatings Technology最新文献_第10页

Engineering TNZT-coated titanium scaffolds via additive manufacturing and magnetron sputtering for bone tissue replacement 通过增材制造和磁控溅射技术制造tnzt涂层钛支架，用于骨组织替代

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

Surface & Coatings Technology

Pub Date : 2025-12-29 DOI: 10.1016/j.surfcoat.2025.133128

Tània Vilella , Ernesto J. Delgado-Pujol , Celia García-Hernández , Gemma Fargas , Conrado R.M. Afonso , Daniel Rodríguez , Cristina García-Cabezón , Ana Alcudia , Juan C. Sánchez-López , Yadir Torres

The biomechanical behavior and corrosion phenomena of porous metallic implants can compromise their clinical success. This work proposes modifying the surface of c.p. titanium scaffolds manufactured by 3D-printing (Direct Ink Writing), depositing a thin film of a β-Ti alloy (Ti-35Nb-7Zr-5Ta) using the High-Power Impulse Magnetron Sputtering (HiPIMS) technique. The versatility of this technique has enabled the fabrication of conformal coatings with uniform thickness, excellent adhesion, a nanorough surface, and a homogeneous columnar distribution. Regarding the biofunctional behavior of the coatings, contact angle measurements and a comprehensive electrochemical study (including impedance spectroscopy, open-circuit potential, and anodic polarization) were performed in artificial saliva. The results are discussed in terms of 1) the potential of the HiPIMS technique; and 2) the role of the coating (effect on stress shielding, improved corrosion resistance, and fatigue life potential). Electrochemical measurements demonstrate the effectiveness of the coating in improving corrosion resistance. In particular, the corrosion current density decreased from 1.62 ± 0.06 μA/cm² for uncoated scaffolds to 0.31 ± 0.01 μA/cm² after coating. At the same time, the polarization resistance increased nearly fivefold (from 0.84 × 10⁵ to 3.72 × 10⁵ Ω·cm²), confirming the protective effect of the TNZT film. The scaffold porosity favors bone ingrowth, while the reduced Young's modulus of the HiPIMS-deposited TNZT coating minimizes bone resorption. Moreover, its higher nanohardness suggests a potential increase in fatigue resistance. Finally, the synergistic combination of DIW-engineered porosity and a compact HiPIMS-deposited TNZT film will successfully alleviate stress shielding while enhancing corrosion resistance and biofunctional compatibility.

多孔金属种植体的生物力学行为和腐蚀现象会影响其临床成功。本研究提出修改3d打印（直接墨水书写）制造的cp钛支架表面，使用大功率脉冲磁控溅射（HiPIMS）技术沉积一层β-钛合金（Ti-35Nb-7Zr-5Ta）薄膜。该技术的多功能性使得涂层具有均匀的厚度、优异的附着力、纳米级的表面和均匀的柱状分布。关于涂层的生物功能行为，在人工唾液中进行了接触角测量和全面的电化学研究（包括阻抗谱、开路电位和阳极极化）。结果从以下几个方面进行了讨论：1)HiPIMS技术的潜力；2)涂层的作用（对应力屏蔽、提高耐蚀性、提高疲劳寿命潜力的作用）。电化学测试证明了涂层在提高耐蚀性方面的有效性。腐蚀电流密度由涂层前的1.62±0.06 μA/cm2降至涂层后的0.31±0.01 μA/cm2。同时，极化电阻增加了近5倍（从0.84 × 105增加到3.72 × 105 Ω·cm2），证实了TNZT薄膜的保护作用。支架孔隙度有利于骨向内生长，而hipims沉积的TNZT涂层的杨氏模量降低了骨吸收。此外，其较高的纳米硬度表明其抗疲劳性能有潜在的提高。最后，diw设计的多孔性和紧凑的hipims沉积TNZT膜的协同组合将成功地减轻应力屏蔽，同时增强耐腐蚀性和生物功能相容性。

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引用次数: 0

Controllable preparation of nanoporous films on silicon via anodic oxidation of iron films 铁膜阳极氧化在硅上可控制备纳米多孔膜

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

Surface & Coatings Technology

Pub Date : 2025-12-29 DOI: 10.1016/j.surfcoat.2025.133135

Zijian Yang , Zhuohao Liu , Zhonglang Liu , Hengkang Jing , Ranfeng Wang , Gang Li , Yan Li , Kaiying Wang

Nanoporous oxide films are promising for catalysis, sensing, and energy-related applications owing to their high surface area. Here, we report a controllable method to fabricate nanoporous iron oxide films on SiO₂/Si substrates via anodic oxidation of sputtered iron coatings. The effects of key anodization parameters, including applied voltage, oxidation time, and electrolyte water content, on pore morphology and film thickness were systematically investigated. Increasing the anodization voltage from 30 V to 90 V resulted in an increase in average pore diameter from approximately 20 nm to 60 nm. Prolonging the oxidation time from 5 min to 30 min led to progressive structural evolution of the porous layer, with an oxide thickness of approximately 918 nm achieved after 10 min. In addition, increasing the water concentration in the electrolyte from 0.1 mol L⁻¹ to 0.3 mol L⁻¹ significantly enhanced oxide growth, yielding porous layers with thicknesses ranging from ~230 nm to ~640 nm. The presence of an SiO₂ insulating layer enabled single-sided anodization of the iron thin film while preventing electrochemical involvement of the silicon substrate. Finite-element simulations were employed to support analysis of the anodic oxidation behavior in the thin-film configuration. This work establishes a straightforward and scalable route for integrating nanoporous oxide films with silicon substrates, offering a versatile platform for applications in energy conversion, electrochemical sensing, and silicon-based nanodevices.

纳米孔氧化膜由于其高表面积，在催化、传感和能源相关应用方面具有广阔的前景。在这里，我们报告了一种可控的方法，通过阳极氧化溅射铁涂层在sio2 /Si衬底上制备纳米多孔氧化铁薄膜。系统研究了氧化电压、氧化时间、电解液含水量等关键阳极氧化参数对膜孔形态和膜厚的影响。将阳极氧化电压从30 V增加到90 V，导致平均孔径从约20 nm增加到60 nm。将氧化时间从5分钟延长到30分钟，导致多孔层的结构逐渐演变，10分钟后氧化厚度约为918 nm。此外，将电解质中的水浓度从0.1 mol L−1增加到0.3 mol L−1，可以显著促进氧化物的生长，生成厚度从~230 nm到~640 nm的多孔层。sio2绝缘层的存在使铁薄膜的单面阳极氧化成为可能，同时防止了硅衬底的电化学参与。采用有限元模拟方法对薄膜结构中的阳极氧化行为进行了分析。这项工作为纳米多孔氧化物薄膜与硅衬底的集成建立了一条简单、可扩展的途径，为能量转换、电化学传感和硅基纳米器件的应用提供了一个通用的平台。

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引用次数: 0

Improving the manufacturability and assessing the performance of rare earth zirconates for thermal barrier coatings 提高稀土锆酸盐热障涂层的可制造性及性能评价

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

Surface & Coatings Technology

Pub Date : 2025-12-29 DOI: 10.1016/j.surfcoat.2025.133137

Luis Isern , Koldo Almandoz Forcen , Christine Chalk , Gyaneshwara Brewster , Alan Johnstone , John Nicholls

Key aero-engine components are subject to gas stream temperatures above the melting point of their metal alloy, a demanding environment that requires the deployment of thermal barrier coatings (TBCs) for their operation. Electron-beam physical vapour deposition (EB-PVD) can produce TBCs with unique columnar microstructures, conferring them the strain compliance required to survive in the cyclic, high-strain, high-thermal load environment experienced by the rotating parts of the high-temperature turbine. Rare earth zirconates (REZs) are proposed as substitute materials of partially-yttria-stabilised zirconia (PYSZ) to operate at higher temperatures due to their ability to withstand CMAS (calcium‑magnesium-alumino-silicate) attack. On the other hand, the lower toughness of REZs makes them more susceptible to erosion damage during service, and some manufacturability issues have been noticed in previous studies. The current paper evaluates the manufacturability, CMAS resistance and erosion resistance of PYSZ and three REZ systems: gadolinium (GZ), neodymium (NZ) and lanthanum (LZ) zirconate. For the first time, successful NZ TBCs have been produced by EB-PVD, presenting a similar morphology, ease of manufacture and CMAS resistance to GZ, but inferior erosion resistance. LZ has compositional banding, lacks columnarity in La-rich regions, and has the lowest CMAS and erosion resistance of the REZs investigated. Co-evaporation of lanthana and PYSZ ingots increased compositional homogeneity of LZ, but the increased La content of the unoptimised process makes the coatings hygroscopic. The erosion resistance of the REZs is 6–10 times lower than PYSZ, but the study of their failure mechanisms indicates a potential improvement strategy by altering the coating morphology.

关键的航空发动机部件受到高于其金属合金熔点的气流温度的影响，这是一个要求苛刻的环境，需要部署热障涂层（tbc）来保证其运行。电子束物理气相沉积（EB-PVD）可以生产出具有独特柱状微结构的tbc，使其具有在高温涡轮旋转部件所经历的循环、高应变、高热负荷环境中生存所需的应变适应性。稀土锆酸盐（REZs）由于具有抗CMAS（钙镁铝硅酸盐）侵蚀的能力，被提出作为部分钇稳定氧化锆（PYSZ）在高温下工作的替代材料。另一方面，由于rez的韧性较低，在使用过程中更容易受到侵蚀破坏，并且在以往的研究中已经注意到一些可制造性问题。本文评价了PYSZ和三种REZ体系：钆（GZ）、钕（NZ）和锆酸镧（LZ）的可制造性、抗CMAS性和抗侵蚀性。利用EB-PVD技术首次成功制备了NZ tbc，具有与GZ相似的形貌、易于制造和抗CMAS性能，但抗侵蚀性能较差。LZ的成分呈带状，富la区缺乏柱状，CMAS和抗侵蚀能力在研究的rez中最低。lanthana和PYSZ锭的共蒸发提高了LZ的成分均匀性，但未优化工艺中La含量的增加使涂层具有吸湿性。REZs的耐蚀性比PYSZ低6-10倍，但对其失效机理的研究表明，可以通过改变涂层形貌来改善REZs的耐蚀性。

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引用次数: 0

From O adsorption to Fe oxide growth: Benchmarking reactive force fields and universal machine learning interatomic potentials against DFT for BCC Fe surface oxidation 从O吸附到Fe氧化物生长：BCC Fe表面氧化的反应力场基准和通用机器学习原子间电位对抗DFT

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

Surface & Coatings Technology

Pub Date : 2025-12-29 DOI: 10.1016/j.surfcoat.2025.133092

Zixiong Wei, Fei Shuang, Poulumi Dey

Iron oxidation is a complex process involving critical atomistic events, such as atomic adsorption, diffusion, and surface reconstruction, understanding of which is significant for both surface science and coating technology. Atomistic simulation serves as an useful tool to investigate the processes, where description of interatomic interactions is required. However, selecting appropriate force field or interatomic potential is not only difficult, but also essential for getting accurate result. In this work, we present a detailed benchmark of reactive force fields (ReaxFFs) and universal machine learning interatomic potentials (uMLIPs) against density functional theory (DFT) calculations of oxygen adsorption on various

α

-iron surfaces, which is the first yet crucial step towards oxidation. The comparisons show the coverage-dependent performance and improvable accuracy of both ReaxFFs and uMLIPs at reproducing DFT results, with ReaxFFs outperforming uMLIPs. Subsequently, iron oxidation is simulated using ReaxFF and uMLIP. The results reveal the strong capability of ReaxFF and poor stability of uMLIP for describing reactive process, i.e., the formation of iron oxide. This may be attributed to the suitable functional form of ReaxFF for the description of bond changes. The insights presented here not only provide an example of benchmarking force field or interatomic potential for system of interest, but also highlight the applicability of ReaxFF and scopes of improvement of uMLIP.

铁氧化是一个复杂的过程，涉及原子吸附、扩散和表面重建等关键原子事件，了解这一过程对表面科学和涂层技术都具有重要意义。原子模拟是研究过程的有用工具，其中需要描述原子间的相互作用。然而，选择合适的力场或原子间势不仅是困难的，而且是获得准确结果的必要条件。在这项工作中，我们提出了反应力场（ReaxFFs）和通用机器学习原子间势（uMLIPs）的详细基准，以对抗各种α-铁表面氧吸附的密度泛函理论（DFT）计算，这是迈向氧化的第一步，也是至关重要的一步。比较显示了reaxff和umlip在再现DFT结果时的覆盖依赖性能和改进的准确性，reaxff优于umlip。随后，使用ReaxFF和uMLIP模拟铁的氧化。结果表明，ReaxFF描述氧化铁生成反应的能力较强，而uMLIP描述氧化铁生成反应的稳定性较差。这可能是由于ReaxFF的功能形式适合描述键的变化。本文提出的见解不仅为感兴趣的系统提供了基准力场或原子间势的例子，而且还强调了ReaxFF的适用性和uMLIP的改进范围。

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引用次数: 0

Microstructure and properties of CoCrNi medium-entropy alloy coatings reinforced by aluminum oxide 氧化铝增强CoCrNi中熵合金涂层的组织与性能

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

Surface & Coatings Technology

Pub Date : 2025-12-29 DOI: 10.1016/j.surfcoat.2025.133139

Xiangdong Li , Haidong Sun , Minghao Shao , Xiaoan Zhao , Chao Wang , Chunhong Zhang , Shusheng Xu , Jinlong Jiang

To significantly enhance the mechanical and tribological performance of face-centered cubic (FCC) CoCrNi medium-entropy alloy (MEA) coatings, Al₂O₃ was incorporated via magnetron DC/RF co-sputtering. This addition effectively suppressed the typical columnar growth, resulting in a densified composite microstructure comprising nanocrystalline, amorphous phases, and nanotwins. The resulting heterogeneous structure exhibited a high elastic strain tolerance and strong resistance to plastic deformation. During dry sliding tests, it effectively blunts nascent microcracks and arrests their propagation. Concurrently, a dense tribo-layer rich in Al₂O₃ formed on the worn track, shielding the coating from direct contact and substantially mitigating adhesive wear. Consequently, the composite coatings exhibited a lower friction coefficient and a reduction in wear rate by approximately an order of magnitude. This work provides a feasible and effective strategy for designing wear-resistant FCC M/HEA coatings through microstructural engineering.

为了显著提高面心立方（FCC） CoCrNi中熵合金（MEA）涂层的力学性能和摩擦学性能，采用磁控DC/RF共溅射方法加入Al2O3。这种添加有效地抑制了典型的柱状生长，形成了致密的复合结构，包括纳米晶、非晶相和纳米孪晶。得到的非均质结构具有较高的弹性应变容限和较强的抗塑性变形能力。在干滑动试验中，它有效地钝化新生微裂纹并阻止其扩展。同时，在磨损的轨道上形成了致密的富含Al2O3的摩擦层，屏蔽了涂层的直接接触，大大减轻了粘着磨损。因此，复合涂层表现出较低的摩擦系数和磨损率降低了大约一个数量级。本研究为FCC M/HEA耐磨涂层的微结构设计提供了可行有效的方法。

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引用次数: 0

Simultaneous enhancement in hydroxyapatite coating adhesion and corrosion resistance of laser power bed fusion produced Ti-6Al-4V alloy as implant materials via femtosecond laser surface processing 采用飞秒激光表面处理工艺制备Ti-6Al-4V合金作为植入材料，同时增强了羟基磷灰石涂层的附着力和耐腐蚀性

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

Surface & Coatings Technology

Pub Date : 2025-12-29 DOI: 10.1016/j.surfcoat.2025.133134

Jinpeng Fang , Nianwei Dai , Xianggang Xing , Ruixiang Liu , Feng Pei , Wei Ji , Lu Zeng , Zhaoxin Lao , Chao Chen , Yachao Zhang , Sizhu Wu

Laser powder bed fusion (LPBF)-produced Ti-6Al-4V alloys as implant materials used in human bodies face challenges in achieving long-term biocompatibility and corrosion resistance. In this work, femtosecond laser surface processing (FLSP) was employed to create micro/nanostructures that promote the electrochemical deposition of hydroxyapatite (HA) coatings and simultaneously enhance corrosion resistance of LPBF-produced Ti-6Al-4V alloy in simulated body fluid (SBF). Microstructural results reveal that HA growth and interfacial bonding strength are improved after FLSP. Electrochemical results demonstrate that the passivation ability and corrosion resistance are considerably enhanced, which mainly attribute to the barrier effect of dense HA coating on alloy substrates.

激光粉末床熔融（LPBF）制备的Ti-6Al-4V合金作为人体植入材料，在实现长期生物相容性和耐腐蚀性方面面临挑战。在这项工作中，利用飞秒激光表面处理（FLSP）创建微/纳米结构，促进羟基磷灰石（HA）涂层的电化学沉积，同时提高lpbf生产的Ti-6Al-4V合金在模拟体液（SBF）中的耐腐蚀性。显微组织结果表明，FLSP后羟基磷灰石的生长和界面结合强度得到改善。电化学结果表明，合金的钝化能力和耐蚀性显著提高，这主要归因于合金基体上致密的HA涂层的阻隔作用。

引用次数: 0

The effect of Mo interlayer on CeO2/Y2O3 reinforced AlCrFeNiCu high-entropy alloy coatings on Zr-4 substrate Mo中间层对Zr-4基体上CeO2/Y2O3增强AlCrFeNiCu高熵合金涂层的影响

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

Surface & Coatings Technology

Pub Date : 2025-12-28 DOI: 10.1016/j.surfcoat.2025.133126

Xiaona Ren , Zhipei Chen , Peng Wang , Wenchang Wang , Yao Wang , Changchun Ge

Rare earth oxide (CeO₂/Y₂O₃) reinforced AlCrFeNiCu high-entropy alloy coatings with a Mo interlayer (designated as Mo/CeO₂-AlCrFeNiCu and Mo/Y₂O₃-AlCrFeNiCu) were successfully deposited onto a Zr-4 substrate via high-speed laser cladding. The microstructural characteristics and properties of the composite coatings were comprehensively investigated. The results demonstrate that the Mo interlayer alleviates the thermal mismatch between the substrate and the HEA coatings and, to a certain degree, counteracts the grain refinement effect induced by the rare earth oxides. Overall, it plays a critical role in enhancing interfacial structural stability, mitigating thermal stress, and improving overall coating performance. It effectively optimizes the coating-substrate bonding integrity, reduces susceptibility to high-temperature fretting fatigue and plastic deformation, and significantly lowers the specific wear rate. Furthermore, the Mo interlayer enhances the compactness and continuity of the interface, suppresses the formation of corrosive pathways, and promotes the formation of a thicker, more stable passive film on the coating surface.

通过高速激光熔覆，成功地在Zr-4衬底上沉积了具有Mo中间层的稀土氧化物（CeO₂/Y₂O₃）增强AlCrFeNiCu高熵合金涂层（指定为Mo/CeO₂-AlCrFeNiCu和Mo/Y₂O₃-AlCrFeNiCu）。对复合涂层的显微组织特征和性能进行了全面研究。结果表明，Mo中间层的存在缓解了基体与HEA涂层之间的热失配，并在一定程度上抵消了稀土氧化物引起的晶粒细化效应。总的来说，它在增强界面结构稳定性、减轻热应力和改善涂层整体性能方面起着关键作用。有效地优化了涂层与基体的结合完整性，降低了高温微动疲劳和塑性变形的敏感性，显著降低了比磨损率。此外，Mo中间层增强了界面的致密性和连续性，抑制了腐蚀路径的形成，促进了涂层表面形成更厚、更稳定的钝化膜。

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引用次数: 0

Understanding passivation potential and early-stage oxidation mechanisms from the intermediate temperature oxidation of CrMoNbTaW based sputtered alloys 从CrMoNbTaW基溅射合金的中温氧化中了解其钝化电位和早期氧化机制

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

Surface & Coatings Technology

Pub Date : 2025-12-27 DOI: 10.1016/j.surfcoat.2025.133124

Md Imran Noor , Damilola D. Alewi , Zahidur Rahman , T. John Balk , Paul F. Rottmann

This research investigates the oxidation behavior of CrMoNbTaW thin films at intermediate temperatures (300 °C–500 °C) during in-air annealing, emphasizing the passivation potential of the protective oxide layer formed at the onset of oxidation. The effects of Cr alloying in MoNbTaW and Al capping on oxidation were analyzed to understand their protective potential. Alloying Cr promotes the development of a continuous oxide layer that acts as a diffusion barrier, increasing the oxidation resistance compared to MoNbTaW. The CrMoNbTaW oxide layer exhibited increasing thickness with annealing temperature and is amorphous. In contrast, applying an Al capping layer to CrMoNbTaW thin films results in a kinetically preferred compact nanocrystalline Al₂O₃ layer on surface along with mixed oxide sites that significantly reduces inward oxygen diffusion. Nanoindentation showed the amorphous mixed oxide layer on CrMoNbTaW to be notably softer and more compliant than the underlying metal. On the other hand, Al-coated films had variations in mechanical properties on top surface due to Al₂O₃ layer but were more protective of base materials hardness and modulus than the uncoated samples. Under identical annealing conditions, both Al-coated and uncoated CrMoNbTaW oxidized rapidly, but exhibited distinct oxidation mechanisms.

本研究研究了CrMoNbTaW薄膜在中间温度（300°C - 500°C）的空气退火过程中的氧化行为，强调了氧化开始时形成的保护氧化层的钝化电位。分析了MoNbTaW和Al盖层中Cr合金化对氧化的影响，了解了它们的保护潜力。Cr的合金化促进了连续氧化层的发展，作为扩散屏障，与MoNbTaW相比，增加了抗氧化性。随着退火温度的升高，CrMoNbTaW氧化层的厚度逐渐增加，呈非晶态。相反，在CrMoNbTaW薄膜上涂上Al盖层，会在表面形成动力学上优先的致密纳米晶Al2O3层，并伴有混合氧化物位点，显著减少向内氧扩散。纳米压痕显示，CrMoNbTaW表面的非晶态混合氧化层明显比底层金属更柔软、更柔顺。另一方面，由于Al2O3层的存在，铝包覆膜的表面力学性能发生了变化，但对基材硬度和模量的保护作用强于未包覆的样品。在相同的退火条件下，镀铝和未镀铝的CrMoNbTaW都能快速氧化，但表现出不同的氧化机制。

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引用次数: 0

Novel bio-compatible coatings formed by plasma electrolytic oxidation of tantalum in NaCl solutions 在NaCl溶液中等离子体电解氧化钽形成新型生物相容性涂层

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

Surface & Coatings Technology

Pub Date : 2025-12-26 DOI: 10.1016/j.surfcoat.2025.133122

Jiale Wu, Tanjun You, Qianna Zhang, Zhi Liu, Zuyong Wang, Yingliang Cheng

For the first time, plasma electrolytic oxidation (PEO) coatings are fabricated on tantalum in NaCl electrolytes. The morphology of the resulting coatings is strongly dependent on the electrolyte concentration. In 0.01 M NaCl, the coating formed for 600 s is non-uniform, showing a nodular surface with a thick sample edge (∼100 μm) and extremely thin center area. In contrast, coatings are uniform in 0.1 and 1 M NaCl. The coating exhibits a grooved surface morphology and a thickness of ∼42 μm in 0.1 M NaCl. However, the morphology changed into round pores and the thickness is reduced to ∼25 μm in 1 M NaCl. XRD confirms that all coatings consist of crystalline Ta₂O₅. Electrochemical tests indicate that the PEO treatment significantly improves the corrosion resistance of tantalum in simulated body fluid (SBF). The coating formed in 0.1 M NaCl exhibits the lowest corrosion current density (i_CORR) of 6.04 × 10⁻⁹ A cm⁻², which is two-order lower than that of bare tantalum (i_CORR = 1.77 × 10⁻⁷ A cm⁻²). Mott-Schottky analyses indicate that all coatings are n-type semiconductor with donor densities between 5.38 × 10¹⁷ cm⁻³ and 3.64 × 10¹⁷ cm⁻³. All coatings are hydrophilic, showing contact angles between 33.4° ± 6.5° and 64.1° ± 4.8°. The 1 M coating shows the highest bonding strength (> ∼7.81 ± 0.25 MPa). Cell biocompatibility of the coatings was assessed using L929 mouse fibroblasts and the CCK-8 assay. In contrast to the round morphology on bare tantalum, the cells on the oxidized surfaces displayed a spindle-like morphology, demonstrating favorable biointerface characteristics. Meanwhile, the cell relative metabolic activity of all coatings on day 7 was approximately 23–25 times higher than that of the substrate. Finally, comparative study on titanium confirms that the formation of PEO coatings on tantalum in NaCl electrolytes is a unique phenomenon among valve metals. This study provides a new way to prepare biocompatible coatings on tantalum and deeper insights into the PEO coating formation mechanisms.

首次在NaCl电解质中制备了钽等离子体电解氧化（PEO）涂层。所得到的涂层的形态强烈依赖于电解质浓度。在0.01 M NaCl中，600 s形成的涂层不均匀，表面呈结节状，样品边缘较厚（~ 100 μm），中心区域极薄。相比之下，涂层在0.1和1m NaCl中是均匀的。在0.1 M NaCl中，涂层表面呈沟槽状，厚度为~ 42 μm。但在1 M NaCl中，形貌变为圆形孔隙，厚度减小至~ 25 μm。XRD证实所有涂层均由结晶Ta2O5组成。电化学试验表明，PEO处理显著提高了钽在模拟体液中的耐蚀性。在0.1 M NaCl中形成的涂层的腐蚀电流密度（iCORR）最低，为6.04 × 10−9 A cm−2，比裸钽的腐蚀电流密度（iCORR = 1.77 × 10−7 A cm−2）低2个数量级。Mott-Schottky分析表明，所有涂层均为n型半导体，供体密度在5.38 × 1017 cm−3和3.64 × 1017 cm−3之间。所有涂层都是亲水性的，接触角在33.4°±6.5°和64.1°±4.8°之间。1m涂层的结合强度最高（> ~ 7.81±0.25 MPa）。采用L929小鼠成纤维细胞和CCK-8法评价膜的细胞生物相容性。与裸露钽表面的圆形形态相比，氧化表面的细胞呈现纺锤状形态，显示出良好的生物界面特征。同时，所有涂层在第7天的细胞相对代谢活性约为底物的23-25倍。最后，通过对钛的对比研究，证实了在NaCl电解质中钽表面形成PEO涂层是阀门金属中独特的现象。该研究为制备生物相容性涂层提供了新的途径，并对PEO涂层的形成机制有了更深入的了解。

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引用次数: 0

Phase stability, thermal cycling behavior and CMAS resistance of Gd2O3-Yb2O3-Y2O3 co-doped ZrO2 EB-PVD thermal barrier coatings Gd2O3-Yb2O3-Y2O3共掺杂ZrO2 EB-PVD热障涂层的相稳定性、热循环行为和抗CMAS性能

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

Surface & Coatings Technology

Pub Date : 2025-12-26 DOI: 10.1016/j.surfcoat.2025.133127

He Tian , Yang Wu , Limin He , Rende Mu

The service temperature of conventional yttria stabilized zirconia (YSZ) thermal barrier coatings (TBCs) is restricted below 1200 °C due to the undesirable phase transformation, inadequate thermal cycling performance and severe calcium‑magnesium-aluminosilicate (CMAS) corrosion at higher temperatures. In such a background, we fabricated a novel Gd₂O₃- Yb₂O₃-Y₂O₃ co-doped ZrO₂ (GYbYSZ) coating by electron beam physical vapor deposition (EB-PVD) and evaluated its high-temperature properties. After isothermal oxidation at 1250 °C for 100 h, the GYbYSZ coating retained a significant fraction of the initial metastable tetragonal (t’) phase, with partial decomposition into the equilibrium tetragonal (t) and cubic (c) phases, demonstrating outstanding phase stability. During the thermal cycling and thermo-mechanical coupled tests, the YSZ coating has lost its columnar structure and completely delaminated from the substrate, while the GYbYSZ coating maintains intact columnar architecture. This enhanced performance is attributed to the exclusive ferroelastic toughening caused by the Gd₂O₃-Yb₂O₃-Y₂O₃ co-doping induced lattice distortion. Exposed to CMAS at 1250 °C, the Gd³⁺ and Yb³⁺ in GYbYSZ coating prefer to diffuse into the CMAS melt, while the Y³⁺ diffusion is limited, thereby stabilizing the GYbYSZ coating. As a result, it exhibits a superior corrosion resistance than the YSZ coating,

传统的钇稳定氧化锆（YSZ）热障涂层由于存在相变不良、热循环性能不佳以及在高温下存在严重的钙镁铝硅酸盐（CMAS）腐蚀，其使用温度限制在1200℃以下。在此背景下，我们采用电子束物理气相沉积（EB-PVD）法制备了一种新型的Gd2O3- Yb2O3-Y2O3共掺杂ZrO2 （GYbYSZ）涂层，并对其高温性能进行了评价。在1250℃等温氧化100 h后，GYbYSZ涂层保留了相当一部分初始亚稳四方（t′）相，并部分分解为平衡四方(t)和立方(C)相，表现出出色的相稳定性。在热循环和热-力耦合试验中，YSZ涂层失去了柱状结构，从基体上完全脱层，而GYbYSZ涂层保持完整的柱状结构。这种增强的性能归因于Gd2O3-Yb2O3-Y2O3共掺杂引起的晶格畸变所引起的铁弹性增韧。在1250℃的CMAS下，GYbYSZ涂层中的Gd3+和Yb3+倾向于扩散到CMAS熔体中，而Y3+的扩散受到限制，从而稳定了GYbYSZ涂层。因此，它表现出比YSZ涂层更好的耐腐蚀性。

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