Gen Zhang , Guolong Wu , Siyuan Tao , Yongfu Zhao , Xianglong Guo , Ye Wang , Yanping Huang , Zongpei Wu , Zhongyu Piao , Jianhua Yao
{"title":"Development and evaluation of laser cladding Inconel 625 + xAl composite coatings on 15CrMo steels for enhanced corrosion resistance in S-CO2 environments","authors":"Gen Zhang , Guolong Wu , Siyuan Tao , Yongfu Zhao , Xianglong Guo , Ye Wang , Yanping Huang , Zongpei Wu , Zhongyu Piao , Jianhua Yao","doi":"10.1016/j.surfcoat.2025.132444","DOIUrl":"10.1016/j.surfcoat.2025.132444","url":null,"abstract":"<div><div>This study investigated the development of laser cladding Inconel 625/aluminium composite coatings on 15CrMo steels for enhanced corrosion resistance in high-temperature supercritical carbon dioxide (S-CO<sub>2</sub>) environments. By optimizing laser process parameters and tailoring Al content (0.5–4 wt%), the microstructural evolution, mechanical properties and corrosion behavior were systematically investigated. The obtained results showed that: i) Increasing Al content promoted Laves phase (Fe<sub>2</sub>(Nb,Mo)) precipitation; ii) Enhanced mechanical performance was observed, with a progressive enhancement in microhardness with rising Al content and wear resistance peaking at 4 wt% Al; iii) After 1000 h exposure to 650 °C S-CO<sub>2</sub>, all coating samples maintained their metallic luster and developed a protective Cr<sub>2</sub>O<sub>3</sub>/NiCr<sub>2</sub>O<sub>4</sub> oxide layer (~156 nm thick at 4 wt% Al), where metastable hexagonal Al<sub>2</sub>O<sub>3</sub> and amorphous SiO<sub>2</sub> at the oxide/coating interface synergistically suppress oxygen diffusion.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"512 ","pages":"Article 132444"},"PeriodicalIF":5.3,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517803","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}
Zechen Yang , Jialei Zhao , Minghui Shi , Lin Qin , Lingmin La
{"title":"High-temperature oxidation behavior of TaNbTiZrW alloy coatings on W-based surfaces","authors":"Zechen Yang , Jialei Zhao , Minghui Shi , Lin Qin , Lingmin La","doi":"10.1016/j.surfcoat.2025.132441","DOIUrl":"10.1016/j.surfcoat.2025.132441","url":null,"abstract":"<div><div>Tungsten, the monolithic metal with the highest melting point in nature, has become the material of choice for plasma-facing first walls in nuclear fusion and for lining components of rocket engine nozzles and throats due to its excellent properties. However, it still faces great technical challenges in practical applications due to its limited oxidation resistance. In this study, a TaNbTiZrW multi-component alloy coating system was fabricated using double glow plasma surface alloying (DGPSA) technology by optimizing temperature parameters. The experimental results indicate that the coatings exhibit a typical BCC solid solution structure with a dense, homogeneous microstructure and strong adhesion to the substrate. The coating exhibits excellent mechanical properties. The surface hardness of the prepared coating significantly increased, with the maximum Vickers hardness under a 0.5 N load reaching 1364 HV, which is three times that of the substrate. Friction and wear tests demonstrate that the coating possesses outstanding wear resistance, achieving a minimum wear rate of 7.41 × 10<sup>−7</sup> under identical test parameters—two orders of magnitude lower than that of the W substrate. The high-temperature oxidation behavior of the coating at 800 °C in air exhibited good oxidation resistance, with the minimum mass gain after 10 h of oxidation being 8.841 mg/cm<sup>2</sup>. During long-term oxidation, the coating with optimal oxidation performance followed a cubic oxidation kinetic law, exhibiting an oxidation rate exponent of 3.59. The coating formed a dense oxide layer consisting of single oxides and composite oxides during the oxidation process. Mechanistic analysis indicates that TiO<sub>2</sub> generated from Ti effectively suppresses the formation of detrimental oxides, while the incorporation of Zr not only accelerates the initial formation of protective oxide layers but also promotes the rapid generation of complex metal oxides. In addition, the formation of TiO<sub>2</sub> and ZrO<sub>2</sub> significantly reduces the overall thermal expansion coefficient of the alloy coating. The synergistic effects of these multi-component elements significantly improve the oxidation resistance of the coating, offering a novel technical pathway for surface modification of tungsten-based materials.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"513 ","pages":"Article 132441"},"PeriodicalIF":5.3,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144523345","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}
Lingzhi Ning , Dingrui Liu , Xiaofeng Dang , Caizhong Zhang , Yao Li , Yue Du , Zeng Tian , Guangni Zhou , Fengying Zhang , Liucheng Zhou
{"title":"Surface strengthening and wear resistance enhancement of electron beam powder bed fusion fabricated Ni-based superalloys via laser shock peening","authors":"Lingzhi Ning , Dingrui Liu , Xiaofeng Dang , Caizhong Zhang , Yao Li , Yue Du , Zeng Tian , Guangni Zhou , Fengying Zhang , Liucheng Zhou","doi":"10.1016/j.surfcoat.2025.132443","DOIUrl":"10.1016/j.surfcoat.2025.132443","url":null,"abstract":"<div><div>Electron beam powder bed fusion (EBPBF) enables the direct fabrication of non-weldable superalloy components; however, surface strengthening remains essential to enhance wear performance. This study investigates the effect of laser shock peening (LSP) on the 600 °C dry sliding wear performance of EBPBF-fabricated IN738 superalloys. LSP introduces a millimeter-scale work-hardened layer through the formation of high-density dislocation structures, including dislocation pairs, stacking faults, and Lomer-Cottrell (L-C) locks, without causing grain refinement or texture changes. Notably, the LSP-treated sample using laser energy of 5 J showcases the most pronounced hardening effect and demonstrates the greatest improvements in wear resistance, with an average coefficient of friction (COF) and wear rate reduced by 23.6 % and 73.6 %, respectively, compared to the as-received sample. This improvement is primarily attributed to the synergistic effects of the work-hardened layer and compressive residual stress (CRS). Additionally, LSP-induced dislocation structures provide a fast pathway for inward oxygen diffusion, facilitating the formation of a uniform oxide layer that protects the surface from wear mass loss and lowers the COF through self-lubricating. As a consequence, LSP treatment shifts the wear mechanism from adhesive wear in the untreated samples to a combination of abrasive and oxidative wear in LSP-treated samples. This study provides valuable insights into the role of the LSP-induced surface-strengthening effect in enhancing wear resistance and highlights the potential of combining surface-strengthening technologies with additive manufacturing for the production of high-performance aerospace components.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"513 ","pages":"Article 132443"},"PeriodicalIF":5.3,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144523346","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}
Qiang Zhong , Changrong Ran , Xueqiang Dong , Jin Na , Shan Wu , Yucheng Hu , Lu Wang , Jinwen Ye
{"title":"In-situ construction of the hydrophobic structure to improve the corrosion resistance on TA1 pure titanium by vacuum heat treatment","authors":"Qiang Zhong , Changrong Ran , Xueqiang Dong , Jin Na , Shan Wu , Yucheng Hu , Lu Wang , Jinwen Ye","doi":"10.1016/j.surfcoat.2025.132440","DOIUrl":"10.1016/j.surfcoat.2025.132440","url":null,"abstract":"<div><div>The inherent hydrophilicity of titanium causes biological contamination and corrosion, limiting their widespread applications. In this work, the limitations of conventional coating processes were overcome by modifying the microstructure of TA1 pure titanium via vacuum heat treatment. A hydrophilic-to-hydrophobic transition (Contact angle increased tenfold) was achieved, along with improved corrosion resistance. Above phase transition temperature (882 °C), a stepped microstructure and a preferential orientation of low-energy <span><math><mfenced><mrow><mn>10</mn><mover><mn>1</mn><mo>¯</mo></mover><mn>0</mn></mrow></mfenced></math></span> and <span><math><mfenced><mrow><mn>11</mn><mover><mn>2</mn><mo>¯</mo></mover><mn>0</mn></mrow></mfenced></math></span> grain surfaces were formed on the TA1 pure titanium. A reduction in surface energy was induced through the synergistic effects of grain coarsening, grain orientation, and surface roughening, resulting in a contact angle exceeding 90°. Compared with untreated samples, electrochemical testing showed that the corrosion current density (i<sub>corr</sub>) of samples treated at 950 °C decreased by 81 %, and the charge transfer resistance (R<sub>p</sub> and R<sub>b</sub>) increased by about 10 times, confirming a correlation between hydrophobicity and corrosion resistance. However, treatment above 1050 °C led to performance decline due to grain refinement and increased high-energy surface fractions. This work demonstrates that vacuum heat treatment can simultaneously enhance hydrophobicity and corrosion resistance in TA1 pure titanium, providing a promising strategy for surface modification of uncoated metals in marine engineering and biomedical applications.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"512 ","pages":"Article 132440"},"PeriodicalIF":5.3,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144514198","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":"Evaluation of high temperature oxidation resistance of AlCoCrFeNiZr high-entropy alloy (HEA) coating system at 1000 °C and 1100 °C","authors":"Okan Odabas , Abdullah Cahit Karaoglanli , Yasin Ozgurluk , Gulfem Binal","doi":"10.1016/j.surfcoat.2025.132439","DOIUrl":"10.1016/j.surfcoat.2025.132439","url":null,"abstract":"<div><div>Powder metallurgy was used to create the high entropy alloy (HEA) AlCoCrFeNiZr powder alloy stoichiometrically (1 mol of each element). Then, using HVOF and APS techniques, CoNiCrAlY with HEA properties and the synthesized AlCoCrFeNiZr were deposited on Inconel 718. To examine its applicability in aerospace components exposed to high operating temperatures, the resulting AlCoCrFeNiZr-HEA coating system was put through isothermal oxidation tests at intervals of 1000 °C and 1100 °C and 5–100 h. Following the tests, the coating system momentarily changed to a rhombohedral lattice with 74 % atomic occupancy at 1100C. Following this change, there was no breakage or fragmentation and the coating system's resistance to oxidation increased. Furthermore, the TGO thickness was determined to be 2.124 μm ± 0.3 and 2.569 μm ± 0.3, respectively, following 100 h of oxidation at 1000 °C and 1100 °C temperatures.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"512 ","pages":"Article 132439"},"PeriodicalIF":5.3,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517802","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}
Heda Bai , Jialai Gao , Jin Li , Jinyang Ni , Xiaoya Wang , Zeyun Cai , Engang Fu , Qiulin Li , Junjie He , Xuesong Leng , Jie Jian , Xiangli Liu
{"title":"Influence of pulse length and N2 flow rate on CrxN coatings prepared by HiPIMS","authors":"Heda Bai , Jialai Gao , Jin Li , Jinyang Ni , Xiaoya Wang , Zeyun Cai , Engang Fu , Qiulin Li , Junjie He , Xuesong Leng , Jie Jian , Xiangli Liu","doi":"10.1016/j.surfcoat.2025.132436","DOIUrl":"10.1016/j.surfcoat.2025.132436","url":null,"abstract":"<div><div>Cr<sub>X</sub>N coatings were fabricated using High-Power Impulse Magnetron Sputtering (HiPIMS). The influence of pulse length and nitrogen (N<sub>2</sub>) flow rate on the microstructure and performance of the coatings was systematically investigated. Long-pulse (100 μs) and short-pulse (50 μs) modes were employed under varying N<sub>2</sub> flow rates (5–35 sccm) to evaluate their impact on coating composition, crystalline phases, mechanical properties, and electrochemical corrosion resistance. Short-pulse mode effectively mitigates target poisoning, sustains high ion bombardment density, and significantly enhances coating density, hardness (40.8 GPa), and corrosion resistance. In contrast, the long-pulse mode achieves enhanced mechanical and corrosion resistance properties at low N<sub>2</sub> flow rates, primarily due to reduced target poisoning and higher peak currents. The findings provide theoretical and practical insights for optimizing HiPIMS parameters to achieve tailored coating performance in diverse application environments.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"513 ","pages":"Article 132436"},"PeriodicalIF":5.3,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144523140","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}
Zichang Pan , Zhengtao Wu , Fuqiang Li , Haiqing Li , Qimin Wang
{"title":"Improving toughness and oxidation resistance of TiB2 films by introducing W interlayer","authors":"Zichang Pan , Zhengtao Wu , Fuqiang Li , Haiqing Li , Qimin Wang","doi":"10.1016/j.surfcoat.2025.132438","DOIUrl":"10.1016/j.surfcoat.2025.132438","url":null,"abstract":"<div><div>This study employed alternating dcMS-TiB<sub>2</sub> and dcMS-W in a pure argon atmosphere to deposit TiB<sub>2</sub>/W nanomultilayer films. The incorporation of the W metal interlayers facilitated atomic diffusion, interfacial mixing, and bonding effects, which effectively inhibited the segregation of B-rich phases and mitigated the stoichiometric deviation of TiB<sub>x</sub> at the interfaces. The influence of varying the W interlayer thicknesses on mechanical properties and oxidation resistance of the TiB<sub>2</sub>/W films was systematically investigated. The results revealed that the films exhibit a nanomultilayer structure, wherein the W interlayers disrupted the columnar growth of TiB<sub>2</sub> grains, resulting in a predominantly nanocrystalline morphology with smooth and dense cross-sectional features. The TiB<sub>2</sub>/W film with 1.3-nm-thick W interlayer exhibits a hardness of 33.0 ± 0.9 GPa, while the TiB<sub>2</sub> single-layer film is 34.9 ± 1.2 GPa. The TiB<sub>2</sub>/W film with a 3.2-nm thick W interlayer demonstrates a 27 % increase in scratch-derived toughness, a 40 % improvement in indentation-derived toughness, and a 57 % enhancement in adhesion strength compared to that of the TiB<sub>2</sub> single-layer film. Furthermore, oxidation tests at 500 °C revealed that the surface of the oxide scales of the TiB<sub>2</sub>/W films was WO<sub>3</sub>-rich, independent of the oxide scale thickness. The W prefers to form large WO<sub>3</sub> particles on the surface of the oxide scales of the TiB<sub>2</sub>/W films. For the thickness of TiB<sub>2</sub>/W film with W interlayers >4.9 nm, the formed WO<sub>3</sub>-rich scale blocks oxygen interaction with B, thereby significantly retarding the oxidation kinetics.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"512 ","pages":"Article 132438"},"PeriodicalIF":5.3,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144491816","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}
Dijuan Han , Jun Li , Tianfang Sun , Yunxia Ye , Xi Pan , Yaran Niu , Xuebin Zheng
{"title":"Thermal shock resistance of TiAlCrY/rare-earth aluminate ceramics thermal barrier coatings on TiAl single crystals","authors":"Dijuan Han , Jun Li , Tianfang Sun , Yunxia Ye , Xi Pan , Yaran Niu , Xuebin Zheng","doi":"10.1016/j.surfcoat.2025.132437","DOIUrl":"10.1016/j.surfcoat.2025.132437","url":null,"abstract":"<div><div>TiAl single crystals have received much attention in aviation industry owing to their low density and excellent high-temperature properties. Yet, their poor oxidation resistance above 1000 °C limits their widespread applications. Rare-earth aluminate ceramics such as LaMgAl<sub>11</sub>O<sub>19</sub> (LaMA) and Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> (YAG) are promising thermal barrier coating (TBC) candidates because of their high thermal stability and low oxygen permeability. In this study, LaMA and YAG powders were synthesized and deposited as top coats on TiAlCrY bond-coated TiAl substrates via APS. Their thermophysical properties and thermal shock resistance at 1100 °C were systematically explored. Results showed that both LaMA and YAG coatings exhibited superior oxygen barrier performance compared to conventional YSZ, mainly due to their lower oxygen vacancy concentrations. Besides, the LaMA/TiAlCrY TBC achieved a thermal shock lifetime of about 150 cycles, three times that of the YAG-based system, and comparable to YSZ/MCrAlY TBCs on Ni-based superalloys. The improved durability of the LaMA coating was attributed to better CTE compatibility, reduced amorphous phase crystallization, and lower elastic modulus, which together mitigated thermal stress-induced cracking. These results provide insights into the design of high-performance TBCs for TiAl-based components.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"513 ","pages":"Article 132437"},"PeriodicalIF":5.3,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144534718","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}
Ergeng Zhang , Jingxing Jiang , Dandan Liang , Qiang Chen , Lei Yang , Qiong Zhou , Xiaoming Chen , Jun Shen
{"title":"Fabrication and erosion performance of Fe-based amorphous/CrN composite coating","authors":"Ergeng Zhang , Jingxing Jiang , Dandan Liang , Qiang Chen , Lei Yang , Qiong Zhou , Xiaoming Chen , Jun Shen","doi":"10.1016/j.surfcoat.2025.132431","DOIUrl":"10.1016/j.surfcoat.2025.132431","url":null,"abstract":"<div><div>Via the physical vapor deposition (PVD) technology, CrN coatings were deposited on the high-velocity air fuel (HVAF) sprayed Fe-based amorphous coatings (ACs) to mend their surface defects. The results showed that the incorporation of CrN film can improve the hardness and hydrophobicity of Fe-based ACs because it can seal the surface holes, reduce defects, and improve densification of Fe-based ACs. Meanwhile, the thick and moderately hard Fe-based AC can also support the CrN film and prevent the eggshell effect. Moreover, the CrN coating can improve the hardness of Fe-based AC from 804.55 HV<sub>200g</sub> to 1104.8 HV<sub>200g</sub>, as well as reduce the coating surface free energy from 29.15 <span><math><mi>mN</mi><mo>·</mo><msup><mi>m</mi><mrow><mo>−</mo><mn>1</mn></mrow></msup></math></span> to 21.13 <span><math><mi>mN</mi><mo>·</mo><msup><mi>m</mi><mrow><mo>−</mo><mn>1</mn></mrow></msup></math></span>, the corrosion current density from 2.7 × 10<sup>−7</sup> A/cm<sup>2</sup> to 0.4 × 10<sup>−7</sup> A/cm<sup>2</sup>, and the mass loss from 0.52 g to 0.41 g in mortar erosion with 50 % sand content. Thereby, the CrN films endow Fe-based AC with enhanced corrosion and erosion resistance. This finding provides a new insight to enhance the corrosion and erosion resistance of Fe-based ACs, thus broadening their potential application in harsh environments.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"513 ","pages":"Article 132431"},"PeriodicalIF":5.3,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144518508","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}
Xing Xiang , Fanyun Su , Junping Lin , Zhengyong Huang
{"title":"Oriented boron nitride composite superhydrophobic surfaces with good thermal conductivity and flashover properties","authors":"Xing Xiang , Fanyun Su , Junping Lin , Zhengyong Huang","doi":"10.1016/j.surfcoat.2025.132433","DOIUrl":"10.1016/j.surfcoat.2025.132433","url":null,"abstract":"<div><div>This study proposes the use of polymerization-induced phase separation to impart superhydrophobic properties to the surface of insulating materials. Combined with 3D printing-based pressure-induced alignment technology, the orientation characteristics of boron nitride (BN) fillers are enhanced, improving the thermal conductivity and charge dissipation performance of the insulating material. The results show that the thermal conductivity of the oriented BN composite superhydrophobic surface increased by 354 %, while the dry flashover, wet flashover, and pollution flashover voltages increased by 85 %, 121 %, and 103 %, respectively. This effectively suppressed arc discharge on the superhydrophobic surface and delayed electrical erosion. The enhancement is likely due to the superhydrophobic surface formed via polymerization-induced phase separation, which prevents the formation of continuous liquid flow and inhibits discharge pathways. Additionally, the oriented BN facilitates radial heat flow distribution in the heat source region, reducing the temperature rise in that area. Together with the antifouling properties of the superhydrophobic surface, these effects synergistically improve the material's resistance to electrical erosion.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"512 ","pages":"Article 132433"},"PeriodicalIF":5.3,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502279","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}