Surface & Coatings Technology最新文献_第4页

Mechanical, tribological and corrosion performance of uncoated and pre-coated TiO2 particles incorporated NiP coatings 未涂覆和预涂覆的含有NiP涂层的TiO2颗粒的机械、摩擦学和腐蚀性能

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

Surface & Coatings Technology

Pub Date : 2026-01-29 DOI: 10.1016/j.surfcoat.2026.133245

Sourav Sarkar , Supriyo Roy , Chinmaya Kumar Sahoo , Saikat Ranjan Maity

Improving the interfacial bonding between ceramic particles within NiP matrix remained a challenging task to engineers. Loosening of ceramic particle during sliding test is a common problem and has not been addressed extensively till now to the best of author's knowledge. Thus, in the present investigation TiO₂ reinforced NiP coating using electroless route has been successfully done. The study investigates the influence of incorporating uncoated TiO₂ particles and TiO₂ particles pre-coated with NiP and Cu (core-shell structures) into electroless NiP matrix. The pre-coated particles were analysed through EDS and SEM. Both uncoated and pre-coated TiO₂ were separately incorporated into the NiP matrix, and the resulting coatings were heat treated (annealing) at 400 °C. Structural and morphological characterisations were performed using SEM, EDS, and XRD, while mechanical, tribological, and electrochemical performances were systematically evaluated. Results indicated that the incorporation of pre-coated TiO₂ particles enhances ceramic particle dispersion and retention within the NiP matrix, leading to modified microstructural features. Compared with conventional Ni-P-TiO₂ and Ni-P-Cu-TiO₂ composites, coatings containing pre-coated particles exhibited superior hardness, reduced friction and wear, and significantly improved corrosion resistance. The NiP pre-coated TiO₂ matrix showed the maximum hardness of 1258 ± 22 HV. Very obviously, the same coating also showed minimum wear rate of 3.26 ± 0.22 mgN⁻¹ m⁻¹ in terms of mass loss and 0.000427 ± 0.0000126 cm³N⁻¹ m⁻¹ in terms of volume loss. On the other hand, Cu pre-coated TiO₂ matrix showed the best corrosion resistance.

改善NiP基体中陶瓷颗粒之间的界面结合仍然是工程师面临的一项具有挑战性的任务。陶瓷颗粒在滑动试验中的松动是一个普遍存在的问题，据笔者所知，目前还没有得到广泛的解决。因此，本研究成功地采用化学方法制备了TiO2增强NiP涂层。研究了未包覆的TiO2粒子和预包覆了NiP和Cu（核壳结构）的TiO2粒子对化学NiP基体的影响。通过EDS和SEM对预涂颗粒进行了分析。将未包覆和预包覆的TiO2分别掺入NiP基体中，并在400℃下进行热处理（退火）。利用SEM、EDS和XRD对材料进行了结构和形态表征，并对材料的力学、摩擦学和电化学性能进行了系统的评价。结果表明，预包覆TiO2颗粒的掺入增强了陶瓷颗粒在NiP基体中的分散和保留，从而改变了微观结构特征。与传统的Ni-P-TiO2和Ni-P-Cu-TiO2复合材料相比，预包覆颗粒涂层具有更高的硬度，降低了摩擦磨损，显著提高了耐蚀性。NiP预包覆的TiO2基体硬度最高可达1258±22 HV。非常明显，同一涂层的最小磨损率为3.26±0.22 mgN−1 m−1，质量损失为3.26±0.22 mgN−1 m−1，体积损失为0.000427±0.0000126 cm3N−1 m−1。另一方面，Cu预包覆TiO2基体的耐蚀性最好。

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引用次数: 0

In-situ stirring and its effect on microstructure evolution and tribological performance in wide temperature induced via addition of dual-functional ceramics in laser directed energy deposition of FeCoCrNi-MoS2-SiC 原位搅拌及其对双功能陶瓷在激光定向能沉积feccrni - mos2 - sic中组织演变和摩擦学性能的影响

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

Surface & Coatings Technology

Pub Date : 2026-01-27 DOI: 10.1016/j.surfcoat.2026.133236

Yulin Luo , Minghao Zhang , Song Gao , Wenli Zhang , Yiwei Yu , Longchao Cao , Rong Chen

Extreme equipment has a critical need for coatings with exceptional wear resistance across a wide temperature range. Dual-functional MoS₂-SiC ceramics were innovatively incorporated into FeCoCrNi coating during laser directed energy deposition to enhance its tribological performance across a wide temperature range (RT to 800 °C). The microstructural evolution and tribological behavior over different temperature intervals were systematically investigated. Active element sulfur alters the surface tension distribution of the molten pool through the solute capillarity effect, competing with the thermocapillary-driven flow to generate an in-situ stirring effect at edge of the molten pool, leading to an increased thermal gradients (530.6 to 800.2 °C/mm) and cooling rate (1048.8 to 1604.9 °C/s), resulting in grain refinement (71.1 to 24.49 μm) and more uniform crystal orientation. The high mixing enthalpy promoted the formation of Cr₃S₄ particles at grain boundaries with hundreds of nanometers in scale, which played an important role in enhancing thermal stability of coating. The composite coating showed increased nanohardness (4.4 to 6.2 Gpa) and slightly reduced elastic modulus (190.6 to 181.1 Gpa), contributing to significantly enhanced tribological properties. At 600–800 °C, the enhancement was mainly due to the formation of a protective tribo-oxide layer composed of self-lubricating MoO₃ and oxidation-resistant SiO₂, accompanied by improved thermal stability, including the inhibition of grain coarsening in heat-affected zone and the suppression of dynamic recrystallization in thermo-mechanically affected zone. At 200–400 °C, the reduced oxidation rate and a strongly adherent oxide layer effectively suppressed adhesive wear.

极端设备迫切需要在宽温度范围内具有优异耐磨性的涂层。在激光定向能沉积过程中，将双功能MoS 2 -SiC陶瓷创新地结合到feccrni涂层中，以提高其在宽温度范围（RT至800°C）内的摩擦学性能。系统地研究了不同温度区间的微观组织演变和摩擦学行为。活性元素硫通过溶质毛细效应改变熔池表面张力分布，与热毛细驱动流动竞争，在熔池边缘产生原位搅拌效应，导致热梯度（530.6 ~ 800.2℃/mm）增大，冷却速率（1048.8 ~ 1604.9℃/s）增大，晶粒细化（71.1 ~ 24.49 μm），晶向更加均匀。高混合焓促进了数百纳米尺度晶界处Cr3S4颗粒的形成，这对提高涂层的热稳定性起着重要作用。复合涂层的纳米硬度（4.4 ~ 6.2 Gpa）提高，弹性模量（190.6 ~ 181.1 Gpa）略有降低，摩擦学性能显著增强。在600 ~ 800℃时，这种增强主要是由于形成了由自润滑MoO3和抗氧化SiO2组成的保护性氧化摩擦层，同时热稳定性得到改善，包括抑制热影响区晶粒粗化和抑制热机械影响区动态再结晶。在200-400℃时，氧化速率降低，氧化层牢固附着，有效抑制了胶粘剂磨损。

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引用次数: 0

In-situ pre-alloying of Ti6Al4V composite coating fabricated by laser melting deposition: Synergistic improvement of microstructure and property 激光熔覆Ti6Al4V复合涂层的原位预合金化：组织和性能的协同改善

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

Surface & Coatings Technology

Pub Date : 2026-01-26 DOI: 10.1016/j.surfcoat.2026.133228

Suxin Dong , Bo Li , Wen Li , Yizhe Cao , Linxiang Liu , Chenhui Hu , Shaodi Wang , Dongxu Hui , Wenfei Huang , Katsuyoshi Kondoh , Junko Umeda , Xin Zhang , Shengyin Zhou , Shufeng Li

For laser melting deposited (LMD) Ti-based coatings, rapid solidification of titanium melt promotes the growth of columnar grains aligned along the path of maximum heat dissipation, resulting in the dominant 〈001〉 texture of β phase and the deterioration of surface strength and fracture toughness. Pre-alloying of Ti powders enables in-situ grown nano-reinforcements which can significantly influence the solidification, microstructure and properties of LMD-composites. Here, comparative studies of mixed Ti6Al4V + TiB₂ powder and Ti6Al4V-TiBw composite powder on the columnar-to-equiaxed transition and strengthening efficiency for Ti6Al4V-TiBw composite coatings fabricated by LMD were performed. By a combination of microstructural characterizations, at optimal printing condition, the microstructure of different coatings fabricated using Ti6Al4V, mixed Ti6Al4V + TiB₂ powder and Ti6Al4V-TiBw composite powder displayed a clear transition from coarse columnar grain, semi-columnar, to equiaxed grains with a small portion of dendrites, respectively. With strongly pinning effect of finer TiBw, the ultimate tensile strength of Ti6Al4V-TiBw composite powder coatings increases by ∼100 MPa relative to mixed Ti6Al4V + TiB₂ powder coatings, accompanied with a 2% loss of plasticity. According to fractography analysis, microcracks in the mixed Ti6Al4V + TiB₂ powder coating initiate and propagate through TiBw clusters and alloy matrix, while microcracks in the Ti6Al4V-TiBw composite powder coating initiate at the dendritic structure. More importantly, the underlying mechanism of TiBw introduction strategy on microstructural evolution of composite coating has been discussed based on the phase diagram of TiB and thermodynamics in terms of heterogenous-phase-related convection and undercooling in rapid solidification process.

对于激光熔覆ti基涂层，钛熔体的快速凝固促进了沿最大散热路径排列的柱状晶粒的生长，导致β相织体以< 001 >为主，表面强度和断裂韧性下降。Ti粉末的预合金化使原位生长的纳米增强能够显著影响lmd复合材料的凝固、组织和性能。对比研究了混合Ti6Al4V + TiB2粉末和Ti6Al4V- tibw复合粉末对LMD制备的Ti6Al4V- tibw复合涂层柱状向等轴转变和强化效率的影响。结合显微组织表征，在最佳打印条件下，Ti6Al4V、Ti6Al4V + TiB2混合粉末和Ti6Al4V- tibw复合粉末制备的不同涂层的显微组织分别表现出从粗柱状晶粒、半柱状晶粒到含有少量枝晶的等轴晶粒的明显转变。Ti6Al4V-TiBw复合粉末涂料的抗拉强度比Ti6Al4V + TiB2混合粉末涂料提高了约100 MPa，同时塑性损失2%。断口分析表明，Ti6Al4V + tib2混合粉末涂层中的微裂纹在TiBw团簇和合金基体中萌生并扩展，而Ti6Al4V-TiBw复合粉末涂层中的微裂纹在枝晶组织中萌生并扩展。基于TiBw相图和热力学，从快速凝固过程中与非均相相关的对流和过冷两方面探讨了TiBw引入策略对复合涂层组织演变的潜在机制。

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引用次数: 0

Thicker the better or thinner: Addressing the dichotomy in the case of MAO coated AZ91 Mg alloy for corrosion protection 越厚越好，或者越薄：解决MAO涂层AZ91镁合金的防腐问题

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

Surface & Coatings Technology

Pub Date : 2026-01-26 DOI: 10.1016/j.surfcoat.2026.133215

Phani Chalapaka , Lakshman Neelakantan , Rama Krishna L.

Magnesium alloys, owing to their high specific strength and low density, are promising materials for lightweight structural applications. However, their poor corrosion resistance severely restricts broader industrial use. The present study developed micro-arc oxidation (MAO) coatings on AZ91 magnesium alloy at a constant current density of 0.3 A cm⁻² using silicate–KOH-based electrolytes containing K₂ZrF₆ and NaAlO₂ additives to modulate the ionic conductivity, consequently the coating voltage. The incorporation of K₂ZrF₆ promoted the in-situ formation of ZrO₂, while aluminate addition facilitated the development of hard MgAl₂O₄ and Al₂O₃ phases and stabilized the high-temperature tetragonal ZrO₂ (t-ZrO₂). The synergistic effect of these phases enhanced coating compactness, reduced microcracks, and improved hardness and corrosion resistance, particularly in thinner coatings. Potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) in 3.5 wt% NaCl solution revealed that all the MAO coatings outperformed the corrosion resistance of the bare substrate. Among them, the optimized aluminate-containing electrolyte produced the most compact coating (A3–11), exhibiting approximately six orders of magnitude reduction in corrosion rate and a four-order increase in impedance relative to the bare substrate. The findings demonstrate that tailoring electrolyte composition enables the formation of dense, defect-minimized MAO coatings with superior protection performance on AZ91 magnesium alloy.

镁合金具有高比强度和低密度的特点，是一种很有前途的轻量化结构材料。然而，它们的耐腐蚀性差严重限制了其更广泛的工业应用。在0.3 a cm−2的恒流密度下，利用含有K₂ZrF₆和NaAlO₂添加剂的硅酸盐- koh基电解质调节AZ91镁合金的离子电导率，从而调节涂层电压，制备了微弧氧化（MAO）涂层。K₂ZrF₆的加入促进了ZrO₂的原位形成，而铝酸盐的加入促进了MgAl₂O₄和Al₂O₃相的形成，并稳定了高温正方ZrO₂（t-ZrO₂）。这些相的协同作用增强了涂层的致密性，减少了微裂纹，提高了硬度和耐腐蚀性，特别是在较薄的涂层中。在3.5 wt% NaCl溶液中进行电位动极化和电化学阻抗谱（EIS）分析，结果表明MAO涂层的耐蚀性能优于裸基体。其中，优化后的含铝酸盐电解质产生了最致密的涂层（A3-11），相对于裸衬底，腐蚀速率降低了约6个数量级，阻抗增加了4个数量级。研究结果表明，调整电解质成分可以在AZ91镁合金上形成致密的、缺陷最小化的MAO涂层，并具有优异的保护性能。

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引用次数: 0

Effect of Ni addition in AlSi hot-dip bath on microstructure, corrosion resistance, and hydrogen embrittlement of hot-press-formed steels AlSi热浸浴中添加Ni对热压成形钢组织、耐蚀性和氢脆的影响

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

Surface & Coatings Technology

Pub Date : 2026-01-26 DOI: 10.1016/j.surfcoat.2026.133225

Dong-Gyu Kim , N Rahul , Sudipta Mohapatra , Min-Suk Oh

Hot-press forming (HPF) excels at manufacturing ultra-high-strength steel through a combination of elevated-temperature forming and in-die quenching. A critical component of this process is the application of AlSi alloy coatings, which are essential for preserving the mechanical properties of steel by preventing decarburization during high-temperature processing. Adding Ni to these coatings shows strong promise for better properties, driven by the development of Ni-based intermetallics like Al₃Ni and Al₉FeNi. Ni additions at 0, 1, 3, and 5 wt% were introduced to the molten AlSi bath to investigate changes in coating microstructure, hydrogen embrittlement (HE) susceptibility, and corrosion behavior post-HPF. With Ni present, intermetallics like Al₉FeNi and Al₃Ni developed on the coating surface as well as within the layer structure. During the HPF process, these intermetallics transformed into Al₅FeNi and localized on the surface of the coating. Ni incorporation substantially limited crack development through the coating thickness while blocking substrate contact with the electrolyte, thus boosting coated steel corrosion resistance. Moreover, Ni addition was found to decrease the formation of surface voids caused by hydrogen atoms; these voids typically occur because of the high reactivity of Al with moisture. Notably, the diffusible hydrogen content in samples containing 5 wt% Ni was reduced from 1.74 to 0.76 wppm immediately after the HPF process, indicating a substantial decrease in HE.

热压成形（HPF）通过高温成形和模内淬火相结合，擅长制造超高强度钢。该工艺的一个关键组成部分是AlSi合金涂层的应用，这是通过防止高温加工过程中的脱碳来保持钢的机械性能所必需的。在Al₃Ni和Al₉FeNi等Ni基金属间化合物的发展的推动下，向这些涂层中添加Ni显示出更好的性能。在AlSi熔液中添加0、1、3和5 wt%的Ni，以研究hpf后涂层微观结构、氢脆（HE）敏感性和腐蚀行为的变化。随着Ni的存在，像Al₉FeNi和Al₃Ni这样的金属间化合物在涂层表面和层结构内发展。在HPF过程中，这些金属间化合物转化为Al₅FeNi并定位在涂层表面。Ni的掺入通过涂层厚度限制了裂纹的发展，同时阻断了基体与电解质的接触，从而提高了涂层钢的耐腐蚀性。此外，Ni的加入减少了由氢原子引起的表面空洞的形成；这些空洞通常是由于铝与水分的高反应性而产生的。值得注意的是，在含有5 wt% Ni的样品中，HPF处理后，可扩散氢含量立即从1.74 wppm降低到0.76 wppm，表明HE显著降低。

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引用次数: 0

Thermal control performance and corrosion resistance of laser-assisted PEO ceramic coatings on LA141 magnesium‑lithium alloy LA141镁锂合金激光辅助PEO陶瓷涂层的热控制性能和耐蚀性

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

Surface & Coatings Technology

Pub Date : 2026-01-26 DOI: 10.1016/j.surfcoat.2026.133233

Guolong Wu , Chen Liu , Lin Li , Yanyi Yin , Zhenzhen Yang , Ye Wang , Chen Wen , Jianhua Yao

This study successfully developed a black thermal control ceramic coating on the surface of a magnesium‑lithium alloy, exhibiting an absorption rate exceeding 0.85 in the 250–2500 nm wavelength range and an emissivity higher than 0.85 in the 2.5–16 μm range. The coating was prepared by introducing NaVO₃ as a colouring agent and employing a combined laser-assisted plasma electrolytic oxidation (Laser/PEO) process. Employing high-speed imaging, SEM, EDS, GDOES, XRD and XPS analyses, the plasma discharge behaviour, coating morphology, and elemental composition were systematically investigated, alongside evaluations of thermal control performance and corrosion resistance. Results indicate that laser irradiation not only induces plasma discharge in the anodic region but also reduces discharge channel dimensions, thereby mitigating structural defects and refining microstructure. Furthermore, the coating exhibited a significant increase in the content of the black phase V₂O₃ and the corrosion-resistant phase Mg₂SiO₄, alongside simultaneous improvements in coating thickness and density. These factors collectively enhanced both the absorption and emission rates. The study demonstrates that the Laser/PEO composite process can concurrently enhance the thermal control performance and anti-corrosion properties of the coating, offering a novel approach for multifunctional surface protection of magnesium‑lithium alloys.

本研究成功地在镁锂合金表面制备了一种黑色热控陶瓷涂层，在250 ~ 2500 nm波长范围内的吸收率超过0.85，在2.5 ~ 16 μm波长范围内的发射率高于0.85。该涂层以NaVO3为着色剂，采用激光辅助等离子体电解氧化（Laser/PEO）复合工艺制备。通过高速成像、SEM、EDS、GDOES、XRD和XPS分析，系统地研究了等离子体放电行为、涂层形貌和元素组成，同时评估了热控制性能和耐腐蚀性。结果表明，激光辐照不仅在阳极区诱导等离子体放电，而且减小了放电通道尺寸，从而减轻了组织缺陷，细化了微观组织。此外，涂层的黑色相V2O3和耐腐蚀相Mg2SiO4的含量显著增加，同时涂层的厚度和密度也有所提高。这些因素共同提高了吸收率和排放率。研究表明，激光/PEO复合工艺可以同时提高涂层的热控制性能和抗腐蚀性能，为镁锂合金的多功能表面保护提供了一种新的途径。

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引用次数: 0

Thermal stability, oxidation resistance, and mechanical properties of CVD TiB0.19C0.37N0.44 hard coating CVD TiB0.19C0.37N0.44硬质涂层的热稳定性、抗氧化性和力学性能

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

Surface & Coatings Technology

Pub Date : 2026-01-26 DOI: 10.1016/j.surfcoat.2026.133226

Fangfang Zeng , Lianchang Qiu , Liying Wu , Jifei Zhu , Wei Cheng , Jin Wen , Yong Du , Xiaoshan Zeng

Nanocomposite TiBCN coatings are promising advanced materials owing to their high hardness, wear resistance, and corrosion resistance. This study investigated the thermal stability and oxidation resistance of a TiB_0.19C_0.37N_0.44 coating deposited on WC-Co cemented carbide by chemical vapor deposition (CVD). The as-deposited TiB_0.19C_0.37N_0.44 coating consisted of nanocrystalline Ti(C,N) and Ti(B,C) phases embedded in an amorphous CN/BN matrix. The incorporation of B atoms into the TiCN coating induced the formation of stacking faults, and the hardness of the TiB_0.19C_0.37N_0.44 coating reached 39.1 GPa. The coating maintained its original phase structure after vacuum annealing at temperatures up to 1200 °C. At 1300 °C, B atoms reacted with the WC-Co substrate to form the CoWB phase. With increasing vacuum annealing temperature, the coating hardness decreased continuously. This behavior is attributed to stress release, grain coarsening, B atom diffusion, and degradation of the nanocomposite structure. During oxidation, the coating exhibited a relatively slow oxidation rate at 600–700 °C. However, after oxidation at 800 °C, the reaction of C and B atoms with oxygen led to the formation and volatilization of CO and B₂O₃, generating pores and microcracks. In summary, the TiB_0.19C_0.37N_0.44 coating maintains a stable phase structure after vacuum annealing below 1300 °C, whereas it undergoes complete oxidation after air annealing at 900 °C. These findings indicate that the TiB_0.19C_0.37N_0.44 coating possesses considerable potential for high-temperature cutting applications.

纳米复合TiBCN涂层具有较高的硬度、耐磨性和耐腐蚀性，是一种很有前途的先进材料。研究了化学气相沉积法（CVD）在WC-Co硬质合金表面沉积TiB0.19C0.37N0.44涂层的热稳定性和抗氧化性。沉积的TiB0.19C0.37N0.44涂层由纳米晶Ti（C，N）和Ti（B，C）相嵌套在无定形CN/BN基体中。TiB0.19C0.37N0.44涂层的硬度达到39.1 GPa， B原子掺入TiB0.19C0.37N0.44涂层形成层错。在1200℃真空退火后，涂层保持了原有的相结构。在1300℃时，B原子与WC-Co底物反应形成CoWB相。随着真空退火温度的升高，涂层硬度不断降低。这种行为归因于应力释放、晶粒粗化、B原子扩散和纳米复合材料结构的降解。在氧化过程中，涂层在600 ~ 700℃表现出相对缓慢的氧化速率。但在800℃氧化后，C和B原子与氧反应，导致CO和B2O3的形成和挥发，产生孔洞和微裂纹。综上所述，TiB0.19C0.37N0.44涂层在1300℃以下真空退火后保持了稳定的相结构，而在900℃空气退火后则完全氧化。这些结果表明，TiB0.19C0.37N0.44涂层具有相当大的高温切削应用潜力。

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引用次数: 0

Design of superhydrophobic anti-icing coatings guided by full-process machine learning 基于全流程机器学习的超疏水防冰涂料设计

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

Surface & Coatings Technology

Pub Date : 2026-01-26 DOI: 10.1016/j.surfcoat.2026.133235

Zijie Zhang , Yiming Liu , Siyu Chen , Lulu Liu , Junjie Liu , Tao Hu , Ting Xiao , Lihua Jiang , Xu Li , Xinyi Li , Xinyu Tan

Superhydrophobic coatings hold immense potential in anti-icing applications. The preparation of superhydrophobic anti-icing coatings involves multi-parameter design such as coating components and substrate structures, which leads to high trial-and-error rates and unclear directionality in performance optimization. Here, we first report a full-process machine learning framework that integrates large language model, post-hoc explainable machine learning model, and Bayesian Optimization framework to guide the preparation of superhydrophobic coating with superior anti-icing performance. The FPMLF autonomously collected 217 sets of coating components data from 2315 published articles, constructed a regression model for coating components design based on the collected data, and achieved the high throughput screening and optimization of the complex process parameters of the substrate structure. Guided by this framework, we successfully fabricated a coating exhibiting a freezing delay time over 30-fold longer than bare substrate. This work provides systematic support and a methodological foundation for the rational design of advanced functional materials with coupled and complex performance requirements.

超疏水涂料在防冰应用中具有巨大的潜力。超疏水防冰涂料的制备涉及到涂料组分和基材结构等多参数设计，导致其性能优化的试错率高，方向性不明确。在这里，我们首先报告了一个集成了大型语言模型、事后可解释机器学习模型和贝叶斯优化框架的全过程机器学习框架，以指导具有优异防冰性能的超疏水涂层的制备。FPMLF从2315篇已发表的论文中自主收集了217组涂层组分数据，并基于收集到的数据构建了涂层组分设计的回归模型，实现了对衬底结构复杂工艺参数的高通量筛选和优化。在这个框架的指导下，我们成功地制造了一种涂层，其冻结延迟时间比裸基材长30倍以上。这项工作为具有耦合和复杂性能要求的先进功能材料的合理设计提供了系统支持和方法基础。

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引用次数: 0

Assessment of biocorrosion and cytocompatibility of sol-gel deposited ceramic particles on plasma electrolytic oxidised ZM21 alloy for temporary orthopaedic implant application 等离子电解氧化ZM21合金溶胶-凝胶沉积陶瓷颗粒的生物腐蚀和细胞相容性评价

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

Surface & Coatings Technology

Pub Date : 2026-01-26 DOI: 10.1016/j.surfcoat.2026.133232

Nasiruddin U. , Thanvanth B.M. , Virutheeshwari VS , Mohankumar N. , Rama Krishna L. , Rameshbabu N.

To further improve the corrosion resistance and biological performance, such as bioactivity, cell adhesion, and cytocompatibility, of plasma electrolytic oxidised magnesium alloys, depositing ceramic particles onto the porous PEO surface via post-processing is a promising approach. The present research focuses on developing a biocompatible and bioactive surface by depositing ceramic materials (titania and silica) onto PEO-coated ZM21 alloy via the sol-gel post-processing approach. The findings suggest that the deposition of ceramic particles has reduced the wettability and surface roughness of the PEO-processed ZM21 alloy by sealing activity. The scratch tests revealed that the critical load of failure (L_c3) is 27.1 N for the PEO coating and increased to 33.1 N for the silica-deposited PEO sample. The PEO treatment improved the anti-corrosion property by four orders of magnitude by reducing the i_corr from 3.36 × 10⁻¹ mA/cm² for the substrate to 7.05 × 10⁻⁵ mA/cm² for the PEO-treated sample. The sol-gel deposition of either titania or silica particles as a post-treatment for PEO samples further reduced the i_corr to 2.25 × 10⁻⁶ mA/cm² and 7.58 × 10⁻⁷ mA/cm², respectively. The cytotoxicity test for the PEO-treated sample at 100% extract concentration showed cell viability of only 63%. In contrast, PEO samples post-treated with titania and silica sol-gel solutions exhibited enhanced cell viabilities of 75% and 83%, respectively, accompanied by increased cell adhesion on the sample surfaces. Considering all the physical, biological, and electrochemical behaviour of the various samples, the silica sol-gel post-treated PEO sample exhibited excellent degradation resistance and cell viability, indicating that it can be a viable material for temporary orthopaedic implant applications.

为了进一步提高等离子电解氧化镁合金的耐腐蚀性和生物性能，如生物活性、细胞粘附性和细胞相容性，通过后处理将陶瓷颗粒沉积在多孔PEO表面是一种很有前途的方法。目前的研究重点是通过溶胶-凝胶后处理方法将陶瓷材料（二氧化钛和二氧化硅）沉积在peo涂层的ZM21合金上，以开发生物相容性和生物活性表面。结果表明，陶瓷颗粒的沉积通过密封活性降低了peo加工ZM21合金的润湿性和表面粗糙度。划痕试验表明，PEO涂层的临界失效载荷（Lc3）为27.1 N，而二氧化硅沉积PEO样品的临界失效载荷（Lc3）为33.1 N。PEO处理将基体的icorr从3.36 × 10−1 mA/cm2降低到7.05 × 10−5 mA/cm2，提高了4个数量级的防腐性能。作为PEO样品后处理的二氧化钛或二氧化硅颗粒的溶胶-凝胶沉积进一步降低了icorr，分别为2.25 × 10−6 mA/cm2和7.58 × 10−7 mA/cm2。经peo处理的样品在100%提取物浓度下的细胞毒性试验显示，细胞存活率仅为63%。相比之下，用二氧化钛和二氧化硅溶胶-凝胶溶液处理后的PEO样品，细胞存活率分别提高了75%和83%，同时细胞在样品表面的粘附也增加了。考虑到各种样品的所有物理，生物和电化学行为，硅胶溶胶-凝胶后处理的PEO样品具有优异的降解抗性和细胞活力，表明它可以成为临时骨科植入物应用的可行材料。

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引用次数: 0

Study on the growth mechanism and properties of Zn-Al-Mg alloy thermal diffusion coatings Zn-Al-Mg合金热扩散涂层生长机理及性能研究

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

Surface & Coatings Technology

Pub Date : 2026-01-26 DOI: 10.1016/j.surfcoat.2026.133230

Xin Wang , Tianyu Zhang , Zihan Zhao , Wenlong Guo , An Du , Yong Wang , Ruina Ma , Yongzhe Fan , Xue Zhao , Xiaoming Cao

Zn-Al-Mg powder co-diffusion was performed on Q235 steel using a mechanical energy-assisted diffusion process. The resulting ZAM alloy diffusion coating comprised an inner FeZn layer composed of δ(FeZn₁₀) and Γ(Fe₁₁Zn₄₀) phases, while the outer layer exhibited a multiphase structure distributed discontinuously in island-like or dot-like patterns on the δ-phase surface. The multiphase structure exhibits layered characteristics extending outward from the δ phase: an Al-rich layer composed of Al₂O₃ and FeAl phases; a Mg-rich layer interwoven with MgAl phases, MgZn phases, and MgO; and an amorphous ZnO layer. The growth mechanism is investigated by this study, revealing that during the primary co-diffusion phase, a 20 μm FeZn layer formed first on the substrate. Subsequently, increased Al atoms combined with Fe atoms within the FeZn phase to form an FeAl layer, thereby inhibiting FeZn layer growth. Finally, active Mg atoms form a Mg-rich layer on the surface of the FeAl layer. Mg-rich layer combines with Al atoms to form a MgAl phase and induces lattice distortion, thereby inhibiting FeAl layer growth. Throughout the process, the removal of HCl exposes the FeZn layer and restores its normal growth. Eventually, under this dynamic mechanism, a complex, multi-phase outer structure is formed. The self-corrosion current (J_corr) of the ZAM diffusion coating (1.673 × 10⁻⁵ A/cm²) markedly lower than the ZA diffusion coating (5.499 × 10⁻⁵ A/cm²). While the ZAM diffusion coating exhibited a weight gain of 1.182 ± 0.075 mg/cm² after 120 h of oxidation at 500 °C, which was slightly higher than the ZA diffusion coating but considerably lower than Q235 steel.

采用机械能辅助扩散法对Q235钢进行了Zn-Al-Mg粉末共扩散。得到的ZAM合金扩散涂层为内FeZn层，由δ(FeZn10)和Γ（Fe11Zn40）相组成，外FeZn层为多相结构，δ相表面呈不连续的岛状或点状分布。多相结构表现出从δ相向外延伸的层状特征：由Al2O3和FeAl相组成的富al层；由MgAl相、MgZn相和MgO相互交织的富镁层；无定形ZnO层。研究结果表明，在初生共扩散阶段，首先在基体上形成20 μm FeZn层；随后，增加的Al原子与FeZn相内的Fe原子结合形成FeAl层，从而抑制FeZn层的生长。最后，活性Mg原子在FeAl层表面形成富Mg层。富mg层与Al原子结合形成MgAl相，引起晶格畸变，从而抑制FeAl层的生长。在整个过程中，HCl的去除使FeZn层暴露并恢复其正常生长。最终，在这种动态机制下，形成了复杂的多相外部结构。ZAM扩散涂层的自腐蚀电流（Jcorr）为1.673 × 10−5 A/cm2，明显低于ZA扩散涂层的5.499 × 10−5 A/cm2。500℃氧化120 h后，ZAM扩散涂层的增重为1.182±0.075 mg/cm2，略高于ZA扩散涂层，但明显低于Q235钢。

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引用次数: 0