Surface & Coatings Technology最新文献

{"title":"Research on the interface bonding mechanism and lifespan model of BIPV bonded structures","authors":"Yonghua Zhu ,&nbsp;Fugui Ha ,&nbsp;Runze Zhang ,&nbsp;Yunchuan Xie ,&nbsp;Zhen Liu","doi":"10.1016/j.surfcoat.2026.133164","DOIUrl":"10.1016/j.surfcoat.2026.133164","url":null,"abstract":"<div><div>Thermoplastic polyolefin (TPO) is widely used in automotive, waterproofing, and electrical applications due to its excellent mechanical properties, weather resistance, and chemical corrosion resistance. With the advancing refinement of solar technology, building-integrated photovoltaics (BIPV) urgently require enhanced bonding strength and durability at the adhesive interface between the TPO base layer and silicone adhesive. This study proposes a modification strategy using plasma treatment to alter the surface chemistry of TPO and improve its interaction with silicone adhesive, thereby constructing a robust and durable bonded interface. Furthermore, a computational model for predicting the service life of adhesive joints under complex external field coupling was established. The results demonstrate that the bonding strength at the interface increased from 0.23 MPa for untreated TPO to 1.25 MPa for plasma-modified TPO, while the lap shear strength improved from 0.42 MPa to 1.84 MPa. Numerical simulations and aging tests were employed to develop a generalized Eyring model for predicting the service life of the adhesive structure under combined stress-humidity-thermal conditions. The model achieved an accuracy of 98%, and the predicted service life of the joint under 45 °C and 30% RH was 18.17 years, meeting practical application requirements. This research provides theoretical support for the design of bonding strength and durability in BIPV interfaces, the formulation of engineering maintenance strategies, and the optimization of lifetime prediction standards, thereby contributing to the long-term safe operation of BIPV under the dual‑carbon goals.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"522 ","pages":"Article 133164"},"PeriodicalIF":6.1,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Competitive effects of ultrasonic surface rolling-induced textures and nanocrystallization on wear behaviors of 42CrMo steel","authors":"Jianxiong Wu ,&nbsp;Kou Du ,&nbsp;Xuelei Fu ,&nbsp;Hongbin Lin ,&nbsp;Chao Zhang ,&nbsp;Weidi Huang ,&nbsp;Bing Xu ,&nbsp;Junhui Zhang","doi":"10.1016/j.surfcoat.2025.133142","DOIUrl":"10.1016/j.surfcoat.2025.133142","url":null,"abstract":"<div><div>Severe wear of 42CrMo steel easily causes unstable power transmission, overload-induced fracture, and even serious safety accidents. Ultrasonic surface rolling process (USRP) is an effective method to enhance the tribological performance of 42CrMo steel due to the gradient nanostructure and surface texture. However, there still lacks a comprehensive understanding about the improvement contribution of tribological performance from surface texture and gradient nanostructure induced by USRP. This study reflects that USRP can effectively generate a gradient nanostructure (~50 nm) and a plastic deformation layer (~500 μm) on the surface. The detailed formation mechanism of the gradient nanostructure is composed of the synergistic effect of lath martensite segregation and dislocation intersection. Moreover, the function of surface texture undergoes a transformation with the increase of surface-strengthening pressure during the wear process: from debris storage-assisted wear resistance function to edge effect-induced wear acceleration function. Under less than 1200 N, wear debris storage induced by texture and gradient nanostructures synergistically improves the tribological performance of 42CrMo steel. Under more than 1200 N, the edge effect caused by the sharp texture becomes more pronounced, further accelerating the wear. These phenomena reveal competitive behaviors between positive impact of gradient nanostructure on enhancing the friction performance and negative effect from the damage at the texture edges. It also leads to a transformation of the dominant wear mechanism with the increase of pressure: from the initial abrasive and oxidative wear to slight abrasive wear accompanied by friction-protective oxide film, and finally to severe abrasive and oxidative wear.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"522 ","pages":"Article 133142"},"PeriodicalIF":6.1,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145898175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the microstructure and current-carrying frictional behaviors of reactively synthesized TiO2-x/Cu/C composite coating","authors":"Zekun Li ,&nbsp;Peng Wang ,&nbsp;Guozheng Ma ,&nbsp;Haidou Wang ,&nbsp;Da Zeng ,&nbsp;Yiliang Gan ,&nbsp;Junhong Jia","doi":"10.1016/j.surfcoat.2026.133154","DOIUrl":"10.1016/j.surfcoat.2026.133154","url":null,"abstract":"<div><div>Ceramic/metal composite coating that integrate superior electrical conductivity, minimal friction coefficients and exceptional wear resistance hold significant importance in current-carrying sliding contact system. In this study, the TiO_2-x/Cu composite coating is prepared by one-step reaction using plasma spraying, and then carbon microspheres are synthesized in situ within the coating defects through hydrothermal reaction at different temperatures, fabricating the TiO_2-x/Cu/C composite coating. Results show that higher hydrothermal temperature improves the graphitization degree of carbon microspheres, and the morphology changes from aggregation to a larger spherical shape as the temperature is elevated from 160 °C to 200 °C, whereas the size of carbon microspheres decreases and severe aggregation occurs at 220 °C. Although the microhardness of the TiO_2-x/Cu/C composite coating decreases owing to the increase in surface structural defects, it increases with increasing temperature. Moreover, the electrical conductivity of the TiO_2-x/Cu/C composite coating is improved by a factor of ten compared to the TiO_2-x/Cu coating. Relatively speaking, the TiO_2-x/Cu/C composite coating exhibits optimal friction reduction and wear resistance at 200 °C, with the friction coefficient and wear rate reaching their minimum observed level. At a lower temperature of 160 °C under dry sliding condition, the composite coating is susceptible to severe adhesive wear, abrasive wear and fatigue wear simultaneously, with wear intensifying under the action of electrical current. Excitingly, a synergistic improvement in friction and wear resistance is observed for the composite coating at higher temperatures (notably 180 °C and 200 °C), regardless of dry sliding or electrical current application.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"522 ","pages":"Article 133154"},"PeriodicalIF":6.1,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145898188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancement of depth and properties of laser quenching strengthening layer in F92 steel by prefabricating light trapping texture","authors":"Peikai Luo ,&nbsp;Guangqi Xu ,&nbsp;Ming Zhou ,&nbsp;Guolong Wu ,&nbsp;Siwei Du ,&nbsp;Haoran Sun ,&nbsp;Yulei Feng ,&nbsp;Yiwu Wu","doi":"10.1016/j.surfcoat.2026.133149","DOIUrl":"10.1016/j.surfcoat.2026.133149","url":null,"abstract":"<div><div>F92 steel is widely used for critical components such as valves and power generation equipment, where improved surface hardness and wear resistance are required for enhanced durability. Conventional quenching methods can increase hardness; however, they often suffer from limited effective hardening depth and poor dimensional controllability. In this study, a laser quenching strategy assisted by a laser textured light trapping surface texture is proposed to enhance the depth and properties of the quenching-strengthened layer in F92 steel. The results show that, under the synergistic effect, the surface reflectivity was significantly reduced from 50.0 % in the original sample to 5.7 %, greatly improving the laser energy absorption efficiency and increasing the quenching depth from 1.0 mm to 2.5 mm. After laser quenching with surface texture, the samples exhibited finer grains, lower residual austenite content, higher dislocation density, and the formation of oxygen solid solution in matrix, compared with water quenched and directly laser quenched samples. The hardness of the sample with the light trapping texture increased to 952.8 HV_0.5 after laser quenching, while the wear rate decreased to 4.13 × 10⁻⁵ mm³·N⁻¹·m⁻¹. Overall, the laser quenched sample with light trapping surface texture exhibited the best hardness and wear resistance, providing a new approach for the surface strengthening of materials such as F92 steel.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"522 ","pages":"Article 133149"},"PeriodicalIF":6.1,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Role of Zn spraying amount and diffusion in governing the corrosion resistance of aluminum microchannel heat-exchange tubes","authors":"Qiang Lu ,&nbsp;Shenshen Cui ,&nbsp;Dezhi Li ,&nbsp;Haochang Chen ,&nbsp;Feng Li ,&nbsp;Bao Yue ,&nbsp;Haishen Wang ,&nbsp;Haixia Deng ,&nbsp;Qudong Wang","doi":"10.1016/j.surfcoat.2026.133168","DOIUrl":"10.1016/j.surfcoat.2026.133168","url":null,"abstract":"<div><div>The service life of aluminum alloy microchannel tubes is often severely limited by corrosion under aggressive environments. In this study, it is revealed that the Zn distribution formed in arc-sprayed coatings after brazing does not decrease monotonically with depth, but instead exhibits a distinctive subsurface concentration peak located at ∼10–22 μm beneath the surface. This unique diffusion feature fundamentally alters the corrosion mechanism: the Zn-rich subsurface layer acts as an internal sacrificial anode that preferentially dissolves, while the corrosion products retained within this region form a locally occluded, partially blocking layer that hinders ionic transport and slows further penetration into the substrate. As a result, compared with uncoated tubes, Zn-coated tubes display more uniform laminar corrosion morphologies and significantly reduced penetration depths. Moreover, the protective performance is highly sensitive to the spraying amount: insufficient Zn deposition causes heterogeneous laminar corrosion, whereas excessive Zn deposition accelerates depletion of the diffusion layer. Comprehensive analysis identifies an optimal Zn spraying amount of ∼8 g/m², which balances diffusion depth, coating uniformity, and sacrificial anode effects, thereby markedly extending the service life of aluminum alloy microchannel heat-exchange tubes.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"522 ","pages":"Article 133168"},"PeriodicalIF":6.1,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influences of Ni and Ti concentrations on the carbon uptake, carbide formation, hardening and corrosion performance of the carbon-expanded austenite case in austenitic Fe-Cr-Ni-Ti alloys","authors":"Xiao Tao ,&nbsp;Yunus Azakli ,&nbsp;Linshan Yu ,&nbsp;Adrian Leyland ,&nbsp;Hanshan Dong ,&nbsp;Allan Matthews ,&nbsp;Haitao Zhao ,&nbsp;Junheng Gao ,&nbsp;Jian Chen","doi":"10.1016/j.surfcoat.2025.133125","DOIUrl":"10.1016/j.surfcoat.2025.133125","url":null,"abstract":"<div><div>The carbide-free, carbon-supersaturated expanded austenite (γ_C) case in low-temperature carburized (LTC) AISI 316 (Fe-18Cr-11Ni-3Mo, wt%) austenitic stainless steel (SS) drawn extensive interests for its high hardness and good corrosion resistance. The addition of strong carbide-forming elements (e.g. Ti) in the substrate alloy would significantly improve the hardening of γ_C, but also tends to accelerate carbide formation that would deteriorate corrosion resistance. Nevertheless, increasing the Ni level would improve the stability of the austenitic structure and tends to prohibit carbide formation in the carburized surface, that could compensate with the Ti addition in matrix. The impacts of increasing Ni/Ti concentrations (either separately or combined) in Fe-Cr-Ni-Me (Me = strong carbide forming elements) austenitic matrix to the surface carburizing response and performance requires systematic examination. Following the above alloy-design concept, Fe-18Cr-18/35Ni(-2Ti) alloys containing approximately 18 wt% Cr and 18/35 wt% Ni, without and with ∼2 wt% Ti, are tentatively investigated after plasma carburizing at 470 and 520 °C for 15 h, respectively. The surface carbon uptake during carburizing and the resulting surface hardness reduce with increasing substrate Ni level, increase substantially with Ti addition in the substrate alloy. Both substrate Ni/Ti additions improve the corrosion resistance of the plasma carburized surfaces. Strikingly, when carburized at 470 °C/15 h, the γ_C case is significantly thicker and harder in Fe-18Cr-18Ni-2Ti (35 μm, 1009 HV_0.3) than that in AISI 316 SS (25 μm, 450 HV_0.3). Moreover, the carburized surfaces of high-Ni/Ti alloys exhibit sluggish carbide formation and improved corrosion resistance than those of AISI 316 SS. This study i) reveals the alloy-design criteria to enhancing hardening, while improving corrosion resistance, for γ_C, and ii) guides the development of carburizing process for specialty corrosion-resistant austenitic alloys.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"522 ","pages":"Article 133125"},"PeriodicalIF":6.1,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aggregating-flow-guiding synergy in micro-channel tool: A surface engineering strategy for enhanced lubrication and wear resistance","authors":"Feilong Du ,&nbsp;Fang Dai ,&nbsp;Cheng Chen ,&nbsp;Hengyu Ma ,&nbsp;Tao Zhou ,&nbsp;Hongfei Yao ,&nbsp;Xuefeng Zhao ,&nbsp;Lin He","doi":"10.1016/j.surfcoat.2026.133192","DOIUrl":"10.1016/j.surfcoat.2026.133192","url":null,"abstract":"<div><div>Addressing the critical challenges of localized high temperatures and accelerated wear during minimum quantity lubrication (MQL) milling, this study proposes an innovative surface engineering strategy by developing a novel micro-channel tool (MCT). A micro-channel design framework, integrating computational fluid dynamics (CFD) and heat transfer theory, is established to facilitate the creation of functional surface structures on the tool rake face. A coupled simulation model investigates systematically the influence of structural parameters—including cross-sectional shape, distribution pattern, and dimension—on interfacial cooling and lubrication performance. By introducing the cross-sectional area (<em>S</em>_<em>cs</em>) of individual microchannels and the channel proportion factor (<em>λ</em>_<em>c</em>) as quantitative evaluation metrics, we elucidate the underlying mechanism of lubrication enhancement, thereby optimizing the channel configuration. Experimental validation confirms the performance enhancement effect of the external shrink (SH) microchannel. This structure connects the microgroove near the cutting edge to the tool's inner side and incorporates rectangular cross-sections with a 6° inclination. Compared to the original micro-groove tool (INT), the MCT reduces cutting force and temperature by 9.88% and 11.21%, respectively. It simultaneously improves the machined surface quality (with surface roughness <em>Ra</em> decreased by 10%) and extends tool service life by 18.2%. The SH-type microchannel appears to exert aggregating and flow-guiding effects, which actively manipulate the oil mist flow and thereby promote the formation of a stable lubricating film at the tool-chip interface. SEM-EDS analysis indicates that the microchannel-enabled film contributes to reduced adhesive and oxidation wear. This work establishes a pioneering “functional surface-lubricating film-wear resistance” collaborative optimization paradigm, offering a theoretical foundation for active thermal and tribological management in the high-efficiency machining of difficult-to-machine materials.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"522 ","pages":"Article 133192"},"PeriodicalIF":6.1,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Osteoconductive composite coating of gelatin/β-TCP on Mg-Zn-Ca alloy using AC-EPD for bone regeneration","authors":"Manisha Behera ,&nbsp;Agnès Denys ,&nbsp;Fabrice Allain ,&nbsp;Cosmin Gruescu ,&nbsp;Annabel Braem ,&nbsp;Rajashekhara Shabadi","doi":"10.1016/j.surfcoat.2026.133166","DOIUrl":"10.1016/j.surfcoat.2026.133166","url":null,"abstract":"<div><div>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. <em>In vitro</em> 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.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"522 ","pages":"Article 133166"},"PeriodicalIF":6.1,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Theoretical and experimental study of electroplated γ-Ni₂Zn₁₁ coatings from a non-aqueous electrolyte: effect of additives on the coating's microstructure, texture characteristics and mechanical properties","authors":"Juan David Matallana Guerrero ,&nbsp;Siddha Sankalpa Sethi ,&nbsp;Tarun Kumar Kundu ,&nbsp;Siddhartha Das ,&nbsp;Karabi Das","doi":"10.1016/j.surfcoat.2025.133144","DOIUrl":"10.1016/j.surfcoat.2025.133144","url":null,"abstract":"<div><div>The viability of 5,5-dimethylhydantoin (DMH) and ethylenediaminetetraacetic acid (EDTA) as complexing agents in the electrolytic baths is systematically studied using experimental and theoretical approaches. The Zn<img>Ni alloy-based coatings were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and nano-indentation studies. Cyclic voltammetry (CV) studies were carried out to study the electrochemical behavior and deposition kinetics of the electrolytic baths with and without the presence of additives. Density functional theory (DFT) calculations indicate that in DMH-based baths, the dissociation energy required to release Ni from the additives is higher than that for Zn, whereas in EDTA baths, Zn dissociates more easily than Ni. The diffusivity of Ni in baths containing EDTA is higher than in baths containing DMH, leading to higher amounts of Ni in the coatings obtained from EDTA baths (~16 wt% Ni). Furthermore, the coatings' texture analysis reveals a change in preferred crystallographic texture from {110}〈001〉 to {001}〈100〉 as the concentration of DMH increases from 0.1 to 0.5 M in the baths, differing from the coatings obtained from EDTA baths at all concentrations which displays {110}〈001〉 components.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"522 ","pages":"Article 133144"},"PeriodicalIF":6.1,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145898147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Laser-driven, precision manufacturing of hierarchical structure surfaces enables tunable superhydrophobic/hydrophilic properties","authors":"Wei Wu ,&nbsp;Kangsen Li ,&nbsp;Changning Bai ,&nbsp;Chi Fai Cheung ,&nbsp;Chunjin Wang","doi":"10.1016/j.surfcoat.2026.133151","DOIUrl":"10.1016/j.surfcoat.2026.133151","url":null,"abstract":"<div><div>This study demonstrates a laser-driven precision manufacturing approach for tunable wettability surfaces by direct conversion of polyimide films into laser-induced graphene (LIG) with hierarchical microstructures. By precisely controlling Ytterbium fiber laser parameters, the reversible transition between superhydrophilic (contact angle ≈ 15°) and superhydrophobic (contact angle ≈ 155°, hysteresis &lt; 5°) states is achieved. Comprehensive characterizations reveal that the non-monotonic wettability transition results from the synergistic evolution of carbonization degree, surface chemistry, and hierarchical roughness. The grid-like LIG structures fabricated at 70 W power exhibited optimal superhydrophobicity due to their unique combination of high sp² carbon content, minimal oxygen content, moderate surface roughness (Sa = 15.27 μm), high fractal dimension (Df = 2.35), and optimal feature aspect ratio (1:4.2). The process exhibited excellent reproducibility (contact angle standard deviation &lt;±2° across 10 samples) and environmental stability (contact angle remained &gt;150° after 30 days of ambient exposure). This approach enables rapid, mask-free fabrication of functional surfaces with tunable wettability for applications in anti-icing, liquid transport, and microfluidic devices.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"522 ","pages":"Article 133151"},"PeriodicalIF":6.1,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145898189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}