Surface & Coatings Technology最新文献_第4页

Influence of NbC particles on microstructure and wear properties of AlCoCrFeNi2.1 eutectic high-entropy alloy coatings prepared by laser cladding

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-02-24 DOI: 10.1016/j.surfcoat.2025.131963

Hui Jiang , LiLi , Wenlong Xie , Chengbin Wei , Delong Jia , Junru Li , Yanhui Li

The AlCoCrFeNi_2.1 eutectic high-entropy alloy (EHEA) coating obtained optimal laser cladding parameters by temperature field simulation and experimental comparison, and the AlCoCrFeNi_2.1-xNbC (x = 0, 2.5, 5.0, 7.5, 10 wt%) composite coatings were successfully prepared using laser cladding. The effect of NbC content on the microstructure, Vickers hardness, and wear resistance of AlCoCrFeNi_2.1-xNbC composite coatings were systematically investigated. The coatings are composed of NbC, FCC/Ll₂, and BCC phases. With the addition of NbC particle, the volume fraction of the NbC phase increases, and their morphology gradually transforms from rod-shaped to irregular polyhedral. The hardness value of the AlCoCrFeNi_2.1-xNbC composite coatings increased from 270 HV0.5 to 365 HV0.5 (hardness value equivalent to H13 steel matrix 2 times). The average friction coefficient and wear volume of AlCoCrFeNi_2.1-xNbC composite coatings have significantly decreased. The AlCoCrFeNi_2.1–5.0NbC composite coating exhibited the optimal wear resistance with a friction coefficient and wear volume of 0.59 and 3.96 × 10⁶ μm³, respectively. While the friction coefficient and wear volume of the H13 are 1.0 and 2.05 × 10⁷ μm³. This was attributed to the suitable proportion of NbC particles that made the coating form a uniform microstructure with appropriate hard and wear resistant.

{"title":"Influence of NbC particles on microstructure and wear properties of AlCoCrFeNi2.1 eutectic high-entropy alloy coatings prepared by laser cladding","authors":"Hui Jiang , LiLi , Wenlong Xie , Chengbin Wei , Delong Jia , Junru Li , Yanhui Li","doi":"10.1016/j.surfcoat.2025.131963","DOIUrl":"10.1016/j.surfcoat.2025.131963","url":null,"abstract":"<div><div>The AlCoCrFeNi<sub>2.1</sub> eutectic high-entropy alloy (EHEA) coating obtained optimal laser cladding parameters by temperature field simulation and experimental comparison, and the AlCoCrFeNi<sub>2.1</sub>-xNbC (x = 0, 2.5, 5.0, 7.5, 10 wt%) composite coatings were successfully prepared using laser cladding. The effect of NbC content on the microstructure, Vickers hardness, and wear resistance of AlCoCrFeNi<sub>2.1</sub>-xNbC composite coatings were systematically investigated. The coatings are composed of NbC, FCC/Ll<sub>2</sub>, and BCC phases. With the addition of NbC particle, the volume fraction of the NbC phase increases, and their morphology gradually transforms from rod-shaped to irregular polyhedral. The hardness value of the AlCoCrFeNi<sub>2.1</sub>-xNbC composite coatings increased from 270 HV0.5 to 365 HV0.5 (hardness value equivalent to H13 steel matrix 2 times). The average friction coefficient and wear volume of AlCoCrFeNi<sub>2.1</sub>-xNbC composite coatings have significantly decreased. The AlCoCrFeNi<sub>2.1</sub>–5.0NbC composite coating exhibited the optimal wear resistance with a friction coefficient and wear volume of 0.59 and 3.96 × 10<sup>6</sup> μm<sup>3</sup>, respectively. While the friction coefficient and wear volume of the H13 are 1.0 and 2.05 × 10<sup>7</sup> μm<sup>3</sup>. This was attributed to the suitable proportion of NbC particles that made the coating form a uniform microstructure with appropriate hard and wear resistant.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"502 ","pages":"Article 131963"},"PeriodicalIF":5.3,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511213","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}

引用次数: 0

Effect of copper addition on the microstructure, wear resistance, anti-corrosion and antibacterial behavior of laser cladding CoCrW coatings in marine environment

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-02-24 DOI: 10.1016/j.surfcoat.2025.131966

Qian Dong , Shaoxian Zheng , Yudong An , Jibin Pu

In response to the issues of wear corrosion and marine bio-erosion faced by aluminum alloy surfaces in marine environments, a series of laser cladding CoCrW-xCu (x = 0, 2, 4, 8) coatings with good metallurgical bonding were prepared on the aluminum surface. The results showed that the addition of Cu by in situ alloying resulted in an increase in the concentration of high-angle grain boundaries (HAGBs) in the coatings and altered the thermodynamic stability of the coating surface. Meanwhile, the addition of copper affected the Co, Cr and W elemental segregation at crystal boundaries and crystal interiors. The synergistic effect of Co, Cr, W and Cu led to the fewest point defects in the passive film of CoCrW-2Cu and the densest film, effectively reducing the likelihood of film breakdown. Thereby the CoCrW-2Cu coating exhibited the best corrosion resistance and wear resistance, with the wear mechanisms being abrasive wear, slight adhesive wear and corrosive wear. In addition, the Cu-containing coatings exhibited remarkable antibacterial properties. This study holds significant theoretical value and practical implications for the application of aluminum alloy components in marine equipment.

{"title":"Effect of copper addition on the microstructure, wear resistance, anti-corrosion and antibacterial behavior of laser cladding CoCrW coatings in marine environment","authors":"Qian Dong , Shaoxian Zheng , Yudong An , Jibin Pu","doi":"10.1016/j.surfcoat.2025.131966","DOIUrl":"10.1016/j.surfcoat.2025.131966","url":null,"abstract":"<div><div>In response to the issues of wear corrosion and marine bio-erosion faced by aluminum alloy surfaces in marine environments, a series of laser cladding CoCrW-xCu (x = 0, 2, 4, 8) coatings with good metallurgical bonding were prepared on the aluminum surface. The results showed that the addition of Cu by in situ alloying resulted in an increase in the concentration of high-angle grain boundaries (HAGBs) in the coatings and altered the thermodynamic stability of the coating surface. Meanwhile, the addition of copper affected the Co, Cr and W elemental segregation at crystal boundaries and crystal interiors. The synergistic effect of Co, Cr, W and Cu led to the fewest point defects in the passive film of CoCrW-2Cu and the densest film, effectively reducing the likelihood of film breakdown. Thereby the CoCrW-2Cu coating exhibited the best corrosion resistance and wear resistance, with the wear mechanisms being abrasive wear, slight adhesive wear and corrosive wear. In addition, the Cu-containing coatings exhibited remarkable antibacterial properties. This study holds significant theoretical value and practical implications for the application of aluminum alloy components in marine equipment.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"502 ","pages":"Article 131966"},"PeriodicalIF":5.3,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488818","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}

引用次数: 0

Exploring atmospheric plasma spraying as a pathway to fabricate solid-state battery constituents

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-02-24 DOI: 10.1016/j.surfcoat.2025.131945

Vasanth Gopal , Killian Clovis , Stefan Björklund , Aniket Balapure , Sanket Goel , Aram Hall , Reza Younesi , Shrikant Joshi

This study aims to demonstrate the feasibility of the atmospheric plasma spraying (APS) technique to fabricate individual constituents of solid-state batteries (SSBs) such as anode, solid electrolyte (SE) and cathode as well as further produce their half-cell (anode|SE) and full-cell (anode|SE|cathode) configurations. The materials targeted in this work were Li₄Ti₅O₁₂ (LTO) as an anode, Li₇La₃Zr₂O₁₂ (LLZO) as a SE and LiNi_1/3Mn_1/3Co_1/3O₂ (NMC111) as a cathode, with aluminium substrates being used as current collectors. The microstructure of the LTO and LLZO layers exhibited a characteristic lamellar structure along with the presence of a secondary phase attributed to delithiation at high temperatures, whereas the NMC111 layer was found to undergo substantial structural change. X-ray diffraction (XRD) analysis suggested that both LTO and LLZO layers retain most of the characteristic peaks along with the presence of secondary phases while NMC111 layers undergone significant change in the crystal structure. The XPS analysis confirms the presence of expected elements and oxidation states for the LTO layer. In the case of the LLZO layer, a metal carbonate surface reaction layer was observed, while the NMC111 layer reveals the presence of Li, Ni, Mn, Co, and O along with feeble metal carbonate. Fabrication of half-cell and full-cell configurations shows encouraging results by revealing a well-intact interface demonstrating the feasibility of the APS technique to accomplish such layered structures. This proof-of-concept effort provides valuable insights into the efficacy of APS for fabricating SSB components for further development, benefiting both the battery and thermal spray communities.

{"title":"Exploring atmospheric plasma spraying as a pathway to fabricate solid-state battery constituents","authors":"Vasanth Gopal , Killian Clovis , Stefan Björklund , Aniket Balapure , Sanket Goel , Aram Hall , Reza Younesi , Shrikant Joshi","doi":"10.1016/j.surfcoat.2025.131945","DOIUrl":"10.1016/j.surfcoat.2025.131945","url":null,"abstract":"<div><div>This study aims to demonstrate the feasibility of the atmospheric plasma spraying (APS) technique to fabricate individual constituents of solid-state batteries (SSBs) such as anode, solid electrolyte (SE) and cathode as well as further produce their half-cell (anode|SE) and full-cell (anode|SE|cathode) configurations. The materials targeted in this work were Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> (LTO) as an anode, Li<sub>7</sub>La<sub>3</sub>Zr<sub>2</sub>O<sub>12</sub> (LLZO) as a SE and LiNi<sub>1/3</sub>Mn<sub>1/3</sub>Co<sub>1/3</sub>O<sub>2</sub> (NMC111) as a cathode, with aluminium substrates being used as current collectors. The microstructure of the LTO and LLZO layers exhibited a characteristic lamellar structure along with the presence of a secondary phase attributed to delithiation at high temperatures, whereas the NMC111 layer was found to undergo substantial structural change. X-ray diffraction (XRD) analysis suggested that both LTO and LLZO layers retain most of the characteristic peaks along with the presence of secondary phases while NMC111 layers undergone significant change in the crystal structure. The XPS analysis confirms the presence of expected elements and oxidation states for the LTO layer. In the case of the LLZO layer, a metal carbonate surface reaction layer was observed, while the NMC111 layer reveals the presence of Li, Ni, Mn, Co, and O along with feeble metal carbonate. Fabrication of half-cell and full-cell configurations shows encouraging results by revealing a well-intact interface demonstrating the feasibility of the APS technique to accomplish such layered structures. This proof-of-concept effort provides valuable insights into the efficacy of APS for fabricating SSB components for further development, benefiting both the battery and thermal spray communities.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"502 ","pages":"Article 131945"},"PeriodicalIF":5.3,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrigendum to “Effect of TiB2 content on the microstructure, corrosion behavior, and wear resistance of (Fe50Mn30Co10Cr10)0.8-x (TiB2)x Mo0.2 high-entropy alloy coatings by laser cladding” [Volume 496, 15 January 2025, 131662/ https://doi.org/10.1016/j.surfcoat.2024.131662]

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-02-22 DOI: 10.1016/j.surfcoat.2025.131915

Jiaye Geng, Xiaohui Yang, Guicheng Wang, Ming Yin, Jucai Li, Yan Li

The (Fe₅₀Mn₃₀Co₁₀Cr₁₀)_0.8-x(TiB₂)_xMo_0.2 (x = 0, 0.05, 0.1, and 0.2 at.%) HEA coatings were fabricated on a c steel substrate using laser cladding technology. To evaluate the effects of TiB₂ additions, this study conducted SEM and TEM microstructural characterization, XRD phase analysis, microhardness testing, friction and wear mechanical testing, and electrochemical corrosion testing. The results indicate that the dominant phase in the coatings is the FCC phase. The addition of TiB₂ inhibits the transition from the FCC to the HCP phase, resulting in the formation of σ and TiB₂ phases within the coatings. These boride phases enhance the wear resistance and hardness of the coatings through solid solution strengthening and second-phase strengthening. Furthermore, the presence of TiB₂ provides stable support for the passivation film on the coating surface, thereby enhancing corrosion resistance. However, an excessive amount of TiB₂ accelerates the formation and growth of the second phase, which acts as a surface defect. This significantly reduces the corrosion resistance of the coating and alters its wear mechanism, ultimately leading to a substantial decrease in wear resistance as well. The coatings exhibited the best overall performance in microhardness, wear resistance, and corrosion resistance at a TiB₂ content of 0.1 at.%.

{"title":"Corrigendum to “Effect of TiB2 content on the microstructure, corrosion behavior, and wear resistance of (Fe50Mn30Co10Cr10)0.8-x (TiB2)x Mo0.2 high-entropy alloy coatings by laser cladding” [Volume 496, 15 January 2025, 131662/ https://doi.org/10.1016/j.surfcoat.2024.131662]","authors":"Jiaye Geng, Xiaohui Yang, Guicheng Wang, Ming Yin, Jucai Li, Yan Li","doi":"10.1016/j.surfcoat.2025.131915","DOIUrl":"10.1016/j.surfcoat.2025.131915","url":null,"abstract":"<div><div>The (Fe<sub>50</sub>Mn<sub>30</sub>Co<sub>10</sub>Cr<sub>10</sub>)<sub>0.8-x</sub>(TiB<sub>2</sub>)<sub>x</sub>Mo<sub>0.2</sub> (x = 0, 0.05, 0.1, and 0.2 at.%) HEA coatings were fabricated on a c steel substrate using laser cladding technology. To evaluate the effects of TiB<sub>2</sub> additions, this study conducted SEM and TEM microstructural characterization, XRD phase analysis, microhardness testing, friction and wear mechanical testing, and electrochemical corrosion testing. The results indicate that the dominant phase in the coatings is the FCC phase. The addition of TiB<sub>2</sub> inhibits the transition from the FCC to the HCP phase, resulting in the formation of σ and TiB<sub>2</sub> phases within the coatings. These boride phases enhance the wear resistance and hardness of the coatings through solid solution strengthening and second-phase strengthening. Furthermore, the presence of TiB<sub>2</sub> provides stable support for the passivation film on the coating surface, thereby enhancing corrosion resistance. However, an excessive amount of TiB<sub>2</sub> accelerates the formation and growth of the second phase, which acts as a surface defect. This significantly reduces the corrosion resistance of the coating and alters its wear mechanism, ultimately leading to a substantial decrease in wear resistance as well. The coatings exhibited the best overall performance in microhardness, wear resistance, and corrosion resistance at a TiB<sub>2</sub> content of 0.1 at.%.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"501 ","pages":"Article 131915"},"PeriodicalIF":5.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143512579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of high-performance ALD-Al2O3/SiO2 nanolaminate coating for atomic oxygen erosion resistance on polyimide

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-02-21 DOI: 10.1016/j.surfcoat.2025.131960

Chi Yan , Jialin Li , Yuhao Dai , ZhiJiang Lan , Haobo Wang , Hua Tong , Xiaojun Ye , Xiao Yuan , Cui Liu , Hongbo Li

Polyimide (PI), commonly used in space applications, is vulnerable to atomic oxygen (AO) erosion in low Earth orbit, causing performance degradation. Atomic layer deposition (ALD) of ultrathin films has great potential as AO protective coatings for aerospace materials. In this study, nanometer-thick plasma-enhanced atomic layer deposition (PEALD) SiO₂ films were deposited on in-situ oxygen plasma-activated PI surfaces. The nucleation and growth process of SiO₂ was systematically analyzed. A uniform and dense SiO₂ film was formed, providing limited resistance to AO erosion, but not sufficient for extreme environmental conditions. To further enhance AO resistance, we introduced thermal ALD-Al₂O₃ interlayers within the same processing window and alternately deposited conformal, continuous Al₂O₃/SiO₂ nanolaminates on the PI surface. The Al₂O₃ interlayer effectively reduced the film deposition roughness, forming a smoother, denser barrier layer and minimizing growth defects. This dense ALD-Al₂O₃/SiO₂ nanolaminate, with its inert Si-O-Al bonds, effectively prevents AO from penetrating the substrate, showing superior protection under long-term AO exposure. After AO irradiation, the surface remained smooth with no obvious defects or voids, effectively avoiding undercutting caused by AO. The synergistic effect of alumina and silica provides excellent AO protection while maintaining good optical transmittance.

{"title":"Fabrication of high-performance ALD-Al2O3/SiO2 nanolaminate coating for atomic oxygen erosion resistance on polyimide","authors":"Chi Yan , Jialin Li , Yuhao Dai , ZhiJiang Lan , Haobo Wang , Hua Tong , Xiaojun Ye , Xiao Yuan , Cui Liu , Hongbo Li","doi":"10.1016/j.surfcoat.2025.131960","DOIUrl":"10.1016/j.surfcoat.2025.131960","url":null,"abstract":"<div><div>Polyimide (PI), commonly used in space applications, is vulnerable to atomic oxygen (AO) erosion in low Earth orbit, causing performance degradation. Atomic layer deposition (ALD) of ultrathin films has great potential as AO protective coatings for aerospace materials. In this study, nanometer-thick plasma-enhanced atomic layer deposition (PEALD) SiO<sub>2</sub> films were deposited on in-situ oxygen plasma-activated PI surfaces. The nucleation and growth process of SiO<sub>2</sub> was systematically analyzed. A uniform and dense SiO<sub>2</sub> film was formed, providing limited resistance to AO erosion, but not sufficient for extreme environmental conditions. To further enhance AO resistance, we introduced thermal ALD-Al<sub>2</sub>O<sub>3</sub> interlayers within the same processing window and alternately deposited conformal, continuous Al<sub>2</sub>O<sub>3</sub>/SiO<sub>2</sub> nanolaminates on the PI surface. The Al<sub>2</sub>O<sub>3</sub> interlayer effectively reduced the film deposition roughness, forming a smoother, denser barrier layer and minimizing growth defects. This dense ALD-Al<sub>2</sub>O<sub>3</sub>/SiO<sub>2</sub> nanolaminate, with its inert Si-O-Al bonds, effectively prevents AO from penetrating the substrate, showing superior protection under long-term AO exposure. After AO irradiation, the surface remained smooth with no obvious defects or voids, effectively avoiding undercutting caused by AO. The synergistic effect of alumina and silica provides excellent AO protection while maintaining good optical transmittance.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"502 ","pages":"Article 131960"},"PeriodicalIF":5.3,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479581","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}

引用次数: 0

Titanium oxide coating on copper surface by electrical discharge coating with hydrogen peroxide-DI water dielectric

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-02-20 DOI: 10.1016/j.surfcoat.2025.131957

Siddanna Awarasang, Jung-Chou Hung

This study investigates the behavior of titanium oxide (TiO₂) coatings on copper surfaces using Electrical Discharge Coating (EDC) with two proportions of hydrogen peroxide (5 % and 10 %) mixed in deionized (DI) water. The experiments utilized additive-manufactured (AM) electrodes to achieve high-quality coatings, and their performance was evaluated using microscopic analysis, XPS, XRD, insulation testing, residual stress, gravimetric analysis, and surface roughness. The results revealed that the highest titanium content was achieved at 80 % duty factor (DF) with 6 A and 8 A currents using 5 % H₂O₂ in DI water. In contrast, 10 % H₂O₂ promoted higher titanium deposition at 70 % DF with 6 A and 60 % DF with 8 A, indicating that hydrogen peroxide concentration influences coating characteristics. Non-stoichiometric titanium oxide was identified through EDS and XPS analysis, with more oxygen detected in oxide form beneath the titanium layer. XRD confirmed the presence of a ceramic-rich TiO₂ layer. Residual stress analysis yielded a compressive stress of −705.576 MPa, indicating excellent mechanical stability and adhesion of the coating to the copper substrate. Insulation testing demonstrated that the titanium oxide layer could withstand higher voltages, showcasing the potential of these coatings in electrical insulation applications and showing a better corrosion characteristic. Achieving titanium oxide coatings, which are typically difficult to form through traditional methods. The use of hydrogen peroxide as an additive in DI water enhances the formation of oxide layers, improving adhesion and ceramic layer properties. This study demonstrates that varying hydrogen peroxide concentrations significantly affect coating composition and performance, providing valuable insights for future applications of EDC-based coatings.

{"title":"Titanium oxide coating on copper surface by electrical discharge coating with hydrogen peroxide-DI water dielectric","authors":"Siddanna Awarasang, Jung-Chou Hung","doi":"10.1016/j.surfcoat.2025.131957","DOIUrl":"10.1016/j.surfcoat.2025.131957","url":null,"abstract":"<div><div>This study investigates the behavior of titanium oxide (TiO₂) coatings on copper surfaces using Electrical Discharge Coating (EDC) with two proportions of hydrogen peroxide (5 % and 10 %) mixed in deionized (DI) water. The experiments utilized additive-manufactured (AM) electrodes to achieve high-quality coatings, and their performance was evaluated using microscopic analysis, XPS, XRD, insulation testing, residual stress, gravimetric analysis, and surface roughness. The results revealed that the highest titanium content was achieved at 80 % duty factor (DF) with 6 A and 8 A currents using 5 % H₂O₂ in DI water. In contrast, 10 % H₂O₂ promoted higher titanium deposition at 70 % DF with 6 A and 60 % DF with 8 A, indicating that hydrogen peroxide concentration influences coating characteristics. Non-stoichiometric titanium oxide was identified through EDS and XPS analysis, with more oxygen detected in oxide form beneath the titanium layer. XRD confirmed the presence of a ceramic-rich TiO₂ layer. Residual stress analysis yielded a compressive stress of −705.576MPa, indicating excellent mechanical stability and adhesion of the coating to the copper substrate. Insulation testing demonstrated that the titanium oxide layer could withstand higher voltages, showcasing the potential of these coatings in electrical insulation applications and showing a better corrosion characteristic. Achieving titanium oxide coatings, which are typically difficult to form through traditional methods. The use of hydrogen peroxide as an additive in DI water enhances the formation of oxide layers, improving adhesion and ceramic layer properties. This study demonstrates that varying hydrogen peroxide concentrations significantly affect coating composition and performance, providing valuable insights for future applications of EDC-based coatings.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"502 ","pages":"Article 131957"},"PeriodicalIF":5.3,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474819","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}

引用次数: 0

Study on the corrosion resistance and self-cleaning of the superhydrophobic NiCoAl-LDH film on anodic aluminum surface

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-02-20 DOI: 10.1016/j.surfcoat.2025.131956

Wenhui Zhang , Maomao Guo , Shilong Zhang , Qizi Wu , Zhuangzhuang Xiong , Guixiang Wang , Ruizhi Wu , Xingwei Wang , Fuqiu Ma , Boris Krit

In this study, NiCoAl-LDH films were synthesized on the surface of anodized aluminum alloy using an in-situ growth method. The films were then modified with three low-surface-energy substances: stearic acid (SA), 1H, 1H, 2H, 2H-perfluorodecyltrimethoxysilane (PFDTMS), and octadecylphosphonic acid (OPA), which differ in their functional groups and mechanisms of action, resulting in the preparation of superhydrophobic composite films. These films exhibited excellent corrosion resistance, superhydrophobicity, and self-cleaning properties. The structure, composition, and properties of the films were analyzed using techniques such as scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). The results indicated that the modified films transitioned from hydrophilic to superhydrophobic, with static water contact angles of 152.8°, 154.2°, and 153.5°, and sliding angles of 4.7°, 3.5°, and 4.2°, respectively, demonstrating excellent self-cleaning performance. Electrochemical tests showed that after immersion in 3.5 wt% NaCl solution for 14 days, the superhydrophobic films maintained outstanding corrosion resistance. Compared to the unmodified NiCoAl-LDH films, the corrosion current density was reduced by three orders of magnitude, exhibiting excellent corrosion resistance. This study explores the interaction mechanisms between different modifiers and LDH, providing valuable insights for the development and application of LDH-based superhydrophobic composite films.

{"title":"Study on the corrosion resistance and self-cleaning of the superhydrophobic NiCoAl-LDH film on anodic aluminum surface","authors":"Wenhui Zhang , Maomao Guo , Shilong Zhang , Qizi Wu , Zhuangzhuang Xiong , Guixiang Wang , Ruizhi Wu , Xingwei Wang , Fuqiu Ma , Boris Krit","doi":"10.1016/j.surfcoat.2025.131956","DOIUrl":"10.1016/j.surfcoat.2025.131956","url":null,"abstract":"<div><div>In this study, NiCoAl-LDH films were synthesized on the surface of anodized aluminum alloy using an in-situ growth method. The films were then modified with three low-surface-energy substances: stearic acid (SA), 1H, 1H, 2H, 2H-perfluorodecyltrimethoxysilane (PFDTMS), and octadecylphosphonic acid (OPA), which differ in their functional groups and mechanisms of action, resulting in the preparation of superhydrophobic composite films. These films exhibited excellent corrosion resistance, superhydrophobicity, and self-cleaning properties. The structure, composition, and properties of the films were analyzed using techniques such as scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). The results indicated that the modified films transitioned from hydrophilic to superhydrophobic, with static water contact angles of 152.8°, 154.2°, and 153.5°, and sliding angles of 4.7°, 3.5°, and 4.2°, respectively, demonstrating excellent self-cleaning performance. Electrochemical tests showed that after immersion in 3.5 wt% NaCl solution for 14 days, the superhydrophobic films maintained outstanding corrosion resistance. Compared to the unmodified NiCoAl-LDH films, the corrosion current density was reduced by three orders of magnitude, exhibiting excellent corrosion resistance. This study explores the interaction mechanisms between different modifiers and LDH, providing valuable insights for the development and application of LDH-based superhydrophobic composite films.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"501 ","pages":"Article 131956"},"PeriodicalIF":5.3,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464802","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}

引用次数: 0

Microstructure and mechanical properties of nano-WC/TA2 composites fabricated by directed energy deposition

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-02-20 DOI: 10.1016/j.surfcoat.2025.131958

Bin Wang , Jianbo Lei , Chao Wang , Yan Fang , Hui Xue

TA2 titanium alloys are widely used in aerospace, chemical, and medical devices with low density, high strength, high corrosion resistance, and good machinability. However, the mechanical properties of TA2 reduce the components' service life and application prospects. In this paper, WC/TA2 composities were prepared using laser direct energy deposition (DED) method to study the changes in microstructure and mechanical properties with the different nano WC additions. The results show that with the increase of nano WC, the in-situ generated TiC shows different morphologies, the hardness and wear resistance are firstly enhanced and then reduced, the wear mechanism changes from adhesive wear to abrasive wear, and the fracture mode changes from ductile fracture to brittle fracture. Overall, the composite with the 14 wt% WC addition exhibits the best performance, the microhardness and the wear rate are 135.4 % and 75.2 %, respectively, compared with the pure TA2 deposited layer. The tensile strength in the parallel direction increased by 162.7 %, and the tensile strength in the vertical direction increased by 132.6 %.

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引用次数: 0

A solid-liquid composite coating of Fe-doped CNT via AACVD method: Achieving low friction and ice resistance

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-02-19 DOI: 10.1016/j.surfcoat.2025.131948

Miaomiao Tang , Xia Zhang , Bo Wang

Superhydrophobic solid-liquid composite (SLC) coatings are recognized as a promising material for addressing wear and ice accumulation issues due to their inherent self-lubricating properties. In this study, iron-doped carbon nanotube (CNT@Fe) coatings with photothermal, anti-friction, and wear-resistant properties were successfully fabricated via an aerosol-assisted chemical vapor deposition (AACVD) process. Subsequently, a spin-coating process was employed to apply perfluoropolyether (PFPE) onto the CNT surface, resulting in the formation of solid-liquid composite coatings. The CNT coating inherently proves to be highly stable, self-lubricating, and wear-resistant properties. Following the application of the solid-liquid composite, the film exhibited an average friction coefficient decrease to 0.10, marking a 33 % decrease compared to the 0.15 coefficient of CNT coatings. Additionally, the wear rate decreased by approximately 74 %. The main factors for reducing friction and preventing wear are the self-lubricating and bearing properties of CNT, along with the solid-liquid synergistic lubrication provided by solid-liquid composite coatings. Meanwhile, the superhydrophobicity of the coatings and the photothermal effect result in excellent anti-icing properties, which make it possible to de-ice in 300 s. The coatings exhibit prospective for outdoor anti-icing applications and mechanical component surfaces due to their photothermal and wear resistance characteristics.

{"title":"A solid-liquid composite coating of Fe-doped CNT via AACVD method: Achieving low friction and ice resistance","authors":"Miaomiao Tang , Xia Zhang , Bo Wang","doi":"10.1016/j.surfcoat.2025.131948","DOIUrl":"10.1016/j.surfcoat.2025.131948","url":null,"abstract":"<div><div>Superhydrophobic solid-liquid composite (SLC) coatings are recognized as a promising material for addressing wear and ice accumulation issues due to their inherent self-lubricating properties. In this study, iron-doped carbon nanotube (CNT@Fe) coatings with photothermal, anti-friction, and wear-resistant properties were successfully fabricated via an aerosol-assisted chemical vapor deposition (AACVD) process. Subsequently, a spin-coating process was employed to apply perfluoropolyether (PFPE) onto the CNT surface, resulting in the formation of solid-liquid composite coatings. The CNT coating inherently proves to be highly stable, self-lubricating, and wear-resistant properties. Following the application of the solid-liquid composite, the film exhibited an average friction coefficient decrease to 0.10, marking a 33 % decrease compared to the 0.15 coefficient of CNT coatings. Additionally, the wear rate decreased by approximately 74 %. The main factors for reducing friction and preventing wear are the self-lubricating and bearing properties of CNT, along with the solid-liquid synergistic lubrication provided by solid-liquid composite coatings. Meanwhile, the superhydrophobicity of the coatings and the photothermal effect result in excellent anti-icing properties, which make it possible to de-ice in 300 s. The coatings exhibit prospective for outdoor anti-icing applications and mechanical component surfaces due to their photothermal and wear resistance characteristics.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"502 ","pages":"Article 131948"},"PeriodicalIF":5.3,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479667","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}

引用次数: 0

Probing the tribo-corrosion behavior and mechanism of Ag-DLC coating and its osteogenic property during postoperative stable service stage

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-02-18 DOI: 10.1016/j.surfcoat.2025.131947

Shiqi Lu , Xubing Wei , Kwang-Ryeol Lee , Jiaqing Ding , Peng Guo , Kai Chen , Dekun Zhang , Wei Zhang , Xiaowei Li

Joint implants are pivotal in effectively treating joint injuries resulting from an aging population, sports-related trauma, and chronic diseases. Among these, implants coated with Ag-DLC coatings have garnered significant attention for their excellent antibacterial properties, which substantially reduced the risk of tissue inflammation in the early postoperative stage. However, there was a lack of research on the coating's structure and the resistance to tribo-corrosion issues during the postoperative stable service stage. In this study, the Ag migration clusters on the surface of Ag-DLC coating were removed by a physical soaking method to simulate the actual state of the coatings during the postoperative stable service stage, and the microstructure, mechanical properties, tribo-corrosion behavior, and osteogenic performance were systematically investigated. The results indicated that the treated Ag-DLC coating deposited at an Ag target current of 0.6 A (S2) exhibited a looser and more porous surface morphology, increased surface roughness, a higher sp²/sp³ ratio, and reduced mechanical properties compared to that of 0.4 A (S1). These differences were attributed to the surface diffusion effect and Ag migration behavior. The treated Ag-DLC coatings greatly improved the tribo-corrosion resistance and the osteogenic property of the 316L SS. The underlying mechanism involves a solid-liquid composite lubrication system with a mixed lubrication state, coupled with the blockage diffusion channel formed by Ag migration behavior, and the properties were closely dependent on the graphitization degree of friction interface and adequacy of the fluid lubrication film.

{"title":"Probing the tribo-corrosion behavior and mechanism of Ag-DLC coating and its osteogenic property during postoperative stable service stage","authors":"Shiqi Lu , Xubing Wei , Kwang-Ryeol Lee , Jiaqing Ding , Peng Guo , Kai Chen , Dekun Zhang , Wei Zhang , Xiaowei Li","doi":"10.1016/j.surfcoat.2025.131947","DOIUrl":"10.1016/j.surfcoat.2025.131947","url":null,"abstract":"<div><div>Joint implants are pivotal in effectively treating joint injuries resulting from an aging population, sports-related trauma, and chronic diseases. Among these, implants coated with Ag-DLC coatings have garnered significant attention for their excellent antibacterial properties, which substantially reduced the risk of tissue inflammation in the early postoperative stage. However, there was a lack of research on the coating's structure and the resistance to tribo-corrosion issues during the postoperative stable service stage. In this study, the Ag migration clusters on the surface of Ag-DLC coating were removed by a physical soaking method to simulate the actual state of the coatings during the postoperative stable service stage, and the microstructure, mechanical properties, tribo-corrosion behavior, and osteogenic performance were systematically investigated. The results indicated that the treated Ag-DLC coating deposited at an Ag target current of 0.6 A (S2) exhibited a looser and more porous surface morphology, increased surface roughness, a higher sp<sup>2</sup>/sp<sup>3</sup> ratio, and reduced mechanical properties compared to that of 0.4 A (S1). These differences were attributed to the surface diffusion effect and Ag migration behavior. The treated Ag-DLC coatings greatly improved the tribo-corrosion resistance and the osteogenic property of the 316L SS. The underlying mechanism involves a solid-liquid composite lubrication system with a mixed lubrication state, coupled with the blockage diffusion channel formed by Ag migration behavior, and the properties were closely dependent on the graphitization degree of friction interface and adequacy of the fluid lubrication film.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"501 ","pages":"Article 131947"},"PeriodicalIF":5.3,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444772","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}

引用次数: 0