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Evaluation of performance and reliability of TFT devices with ultra-thin HfTiO dielectric layer deposited by plasma enhanced atomic layer deposition
IF 5.3 2区 材料科学
Surface & Coatings Technology Pub Date : 2025-02-01 DOI: 10.1016/j.surfcoat.2025.131782
Wen-Zhi Zhang , Xiao-Ying Zhang , Zhi-Xuan Zhang , Yun-Shao Cho , Chien-Jung Huang , Gao Peng , Lin-Qin Jiang , Yu Qiu , Shui-Yang Lien
{"title":"Evaluation of performance and reliability of TFT devices with ultra-thin HfTiO dielectric layer deposited by plasma enhanced atomic layer deposition","authors":"Wen-Zhi Zhang ,&nbsp;Xiao-Ying Zhang ,&nbsp;Zhi-Xuan Zhang ,&nbsp;Yun-Shao Cho ,&nbsp;Chien-Jung Huang ,&nbsp;Gao Peng ,&nbsp;Lin-Qin Jiang ,&nbsp;Yu Qiu ,&nbsp;Shui-Yang Lien","doi":"10.1016/j.surfcoat.2025.131782","DOIUrl":"10.1016/j.surfcoat.2025.131782","url":null,"abstract":"<div><div>Titanium (Ti)-doped hafnium oxide (HfO<sub>2</sub>) films have garnered dramatical interest by virtue of their high dielectric constant (<em>k</em>). Ti-doped HfO<sub>2</sub> (HfTiO) films were prepared using plasma-enhanced atomic layer deposition at a substrate temperature of 300 °C by varying cycle ratio between HfO<sub>2</sub> and titanium oxide (TiO<sub>2</sub>) deposition. The influence of Ti doping, with cycle ratios ranging from 0 to 40 %, on the properties of HfTiO films was identified by spectroscopic ellipsometry (SE), X-ray photoelectron spectroscopy, grazing incidence X-ray diffraction (GIXRD), X-ray reflectivity, field-emission scanning electron microscopy, and UV–vis spectroscopy. For the electric measurements, aluminum (Al) /HfO<sub>2</sub> or HfTiO films/Si capacitors were prepared through evaporating Al dots. SE measurements revealed that the deposition rate of HfTiO films decreased as the TiO<sub>2</sub> cycle ratio increased. GIXRD analysis showed that HfTiO films are polycrystalline and the intensity of the (−221) and (221) crystallite orientations in the HfTiO film with a 10 % TiO<sub>2</sub> cycle ratio was reduced compared to that of HfO<sub>2</sub> film. The band gap of HfTiO film was lower than that of the HfO<sub>2</sub> film. The electrical characterization of the HfTiO films showed a high <em>k</em> value of 30.0 for the 10 % TiO<sub>2</sub> cycle ratio sample, which is higher than the <em>k</em> value of 19.7 for the undoped HfO<sub>2</sub> film. The leakage current density of HfTiO film was minimized at the 10 % TiO<sub>2</sub> cycle ratio. To assess the potential application of HfTiO film as gate dielectrics in thin film transistor (TFT) devices, indium‑gallium‑zinc oxide (IGZO) was applied as a channel layer. The optimized IGZO/HfTiO (10 nm) TFTs exhibited an on/off current ratio of 8.9 × 10<sup>8</sup>, a subthreshold swing of 74 mV/decade, and a saturation mobility of approximately 7.6 cm<sup>2</sup>/V·s at a low threshold voltage of −0.08 V.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"497 ","pages":"Article 131782"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142872","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
Pronounced effect of surface coating on the antenna characteristics at mmWave frequency band
IF 5.3 2区 材料科学
Surface & Coatings Technology Pub Date : 2025-02-01 DOI: 10.1016/j.surfcoat.2025.131801
Ying-Chih Chiang , Yu-Hsun Chang , Zhao-Yu Yang , Chien-Chang Huang , Cheng-En Ho
{"title":"Pronounced effect of surface coating on the antenna characteristics at mmWave frequency band","authors":"Ying-Chih Chiang ,&nbsp;Yu-Hsun Chang ,&nbsp;Zhao-Yu Yang ,&nbsp;Chien-Chang Huang ,&nbsp;Cheng-En Ho","doi":"10.1016/j.surfcoat.2025.131801","DOIUrl":"10.1016/j.surfcoat.2025.131801","url":null,"abstract":"<div><div>Millimeter wave (mmWave) antennas have gained considerable attention in 5G/6G wireless communications due to wider bandwidth, lower latency, and better spatial resolution. The focus of this study was to deeply probe into the surface finish effect on the scattering parameters (<em>S</em>-parameters), radiation patterns, gain, and temperature distribution of a mmWave antenna (77 GHz) through a high-frequency structure simulator (HFSS), Icepak, vector network analyzer (VNA), and anechoic chamber measurements. We investigated different surface finishes over the Cu circuit of an antenna, including Au/Ni(P) (ENIG), Au/Pd/Ni(P) (ENEPIG), ultrathin-Ni(P)-type ENEPIG, immersion tin (ImSn), Au/Pd(P)/Au (IGEPIG), and immersion gold (IG). The numerical simulations via HFSS/Icepak and experimental measurements via VNA/ anechoic chamber showed that the type of surface finish plays a dominant role in the mmWave signal characteristics and ultrathin-Ni(P)-type ENEPIG and IGEPIG surface coatings possess better antenna performance than other surface finishes examined, which provides valuable information for the development of mmWave wireless communications.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"497 ","pages":"Article 131801"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142875","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
The stress distribution and failure behavior of non-uniformed TGO based on oxygen concentration: A novel geometric description of TGO by the parameterized arc
IF 5.3 2区 材料科学
Surface & Coatings Technology Pub Date : 2025-02-01 DOI: 10.1016/j.surfcoat.2024.131705
Shutao Chen , Chuntang Yu , Lei Zhang , Xiaoyun Li , Min Feng , Chengyang Jiang , Shuai Li , Zebin Bao , Guozheng Quan , Shenglong Zhu , Fuhui Wang
{"title":"The stress distribution and failure behavior of non-uniformed TGO based on oxygen concentration: A novel geometric description of TGO by the parameterized arc","authors":"Shutao Chen ,&nbsp;Chuntang Yu ,&nbsp;Lei Zhang ,&nbsp;Xiaoyun Li ,&nbsp;Min Feng ,&nbsp;Chengyang Jiang ,&nbsp;Shuai Li ,&nbsp;Zebin Bao ,&nbsp;Guozheng Quan ,&nbsp;Shenglong Zhu ,&nbsp;Fuhui Wang","doi":"10.1016/j.surfcoat.2024.131705","DOIUrl":"10.1016/j.surfcoat.2024.131705","url":null,"abstract":"<div><div>TBCs are primarily applied to aero-engine blades to improve the thermal insulation performance and extend the service life of the gas turbine. While the understanding of the effect of non-uniform growth of TGO on the stress distribution and structural stability of TBCs is still limited. Therefore, this study is devoted to exploring the influence of non-uniform TGO on the stress distribution of TBCs. A roughness characterization method of parametric arc radian is proposed, and the TGO growth control equation based on the oxygen diffusion distribution is established in this paper. The results indicated that as the radius (R) or radian (ω) of the models increases, the difference in TGO thickening becomes more significant, with the peak oxygen concentration in TGO increasing and the valley oxygen concentration decreasing. Furthermore, the radius (R) and radian (ω) of the TGO morphology also exert noticeable effects on the magnitude and distribution of stress.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"497 ","pages":"Article 131705"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143143205","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 thermal oxidation on microstructure and wear resistance of TiZrNb medium-entropy alloy
IF 5.3 2区 材料科学
Surface & Coatings Technology Pub Date : 2025-02-01 DOI: 10.1016/j.surfcoat.2024.131724
Yongfan Fu , Shiwen Hu , Dandan Zhu , Zefeng Chen , Dexue Liu
{"title":"Effect of thermal oxidation on microstructure and wear resistance of TiZrNb medium-entropy alloy","authors":"Yongfan Fu ,&nbsp;Shiwen Hu ,&nbsp;Dandan Zhu ,&nbsp;Zefeng Chen ,&nbsp;Dexue Liu","doi":"10.1016/j.surfcoat.2024.131724","DOIUrl":"10.1016/j.surfcoat.2024.131724","url":null,"abstract":"<div><div>Ti45Zr45Nb10 medium-entropy alloy (TZN MEA) possess superior biomechanical characteristics, characterized by a low modulus of elasticity (55 ± 2 GPa) and high yield strength (678 ± 17 MPa); however, its inferior wear resistance restricts its application in the biomedical field. Surface modification techniques can address this deficiency. Among these techniques, thermal oxidation stands out as a straightforward and environmentally benign technique capable of significantly enhancing the surface attributes of alloys. In the present investigation, TZN MEA was subjected to thermal oxidation treatment across a temperature range of 400 to 500 °C for 2 to 6 h. The impact of oxidation time and temperature on the alloys' morphological, weight, oxide layer thickness, phase composition, hardness, and frictional properties have been examined. With increasing oxidation time and temperature, the oxidation kinetics of the alloys followed a parabolic trend, with the oxide layer thickness on the surface increasing from 0.9 to 13.3 μm and the density rising from 0.647 to 1.097 g·cm<sup>‐3</sup>. The oxide layer primarily consisted of TiO<sub>2</sub> and ZrO<sub>2</sub>, with a minor contribution from Nb<sub>2</sub>O<sub>5</sub>. The development of a high-hardness oxide layer and the concurrent increase in density led to a pronounced enhancement in the hardness of the oxidized specimens, which increased by a factor of 1.5 to 4 (377 to 1133 <span><math><msub><mi>HV</mi><mn>0.05</mn></msub></math></span>). Furthermore, their wear resistance was significantly improved, with the wear volume being reduced from 0.0627 mm<sup>3</sup> to the range of 0.00023 mm<sup>3</sup> to 0.00037 mm<sup>3</sup>. Comparative analysis with Ti6Al4V alloy revealed that the TZN MEA exhibited superior wear resistance after thermal oxidation. The wear mechanism of the oxidized samples is dominated by abrasive wear. Moreover, the corrosion resistance and wettability after thermal oxidation are improved to a certain extent. These results indicate that the TZN MEA has excellent wear resistance after thermal oxidation, which broadens their application prospects as a human implant.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"497 ","pages":"Article 131724"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143143213","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
Superior performance of Gd0.75Yb0.25PO4 in resisting CMAS + sea salt corrosion
IF 5.3 2区 材料科学
Surface & Coatings Technology Pub Date : 2025-02-01 DOI: 10.1016/j.surfcoat.2025.131739
Yuanpeng Wang , Xiufang Gong , Xiaohu Yuan , Lanxin Zou , Ruxue Wu , Bin Long , Wei Wang , Lei Guo
{"title":"Superior performance of Gd0.75Yb0.25PO4 in resisting CMAS + sea salt corrosion","authors":"Yuanpeng Wang ,&nbsp;Xiufang Gong ,&nbsp;Xiaohu Yuan ,&nbsp;Lanxin Zou ,&nbsp;Ruxue Wu ,&nbsp;Bin Long ,&nbsp;Wei Wang ,&nbsp;Lei Guo","doi":"10.1016/j.surfcoat.2025.131739","DOIUrl":"10.1016/j.surfcoat.2025.131739","url":null,"abstract":"<div><div>When aero-engines are operated in near-sea environments, the coexistence of calcium‑magnesium-alumina-silicate (CMAS) and sea salt (CMAS+SS) poses significant risks to the safety of thermal barrier coatings (TBCs). Therefore, it is urgent to develop TBCs resistant to CMAS+SS corrosion. In this study, a TBC candidate material Gd<sub>0.75</sub>Yb<sub>0.25</sub>PO<sub>4</sub> is found to reveal superior performance in resisting CMAS+SS corrosion. At high temperatures, Gd<sub>0.75</sub>Yb<sub>0.25</sub>PO<sub>4</sub> and CMAS+SS reacts to form a double-layer interface reaction layer, which has a lower sub-layer consisting of (Gd, Yb)-lean apatite and an upper sub-layer initially comprising transitional (Gd, Yb)-mid apatite that gradually evolves into (Gd, Yb)-rich apatite as the reaction progresses. The formation of the interface reaction layer increases the viscosity of the residual melt and suppresses melt penetration. The reaction layer reaches a stable structure rapidly, and remains tightly bound to the substrate with intact structural integrity during thermal cycling, enabling continued resistance against secondary sediment corrosion.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"497 ","pages":"Article 131739"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143143457","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
Temperature field simulation and experimental investigation for column-faced 45 steel via ultrafast electron beam scanning
IF 5.3 2区 材料科学
Surface & Coatings Technology Pub Date : 2025-02-01 DOI: 10.1016/j.surfcoat.2025.131802
Rong Wang, Zhenfei Song, Jiaxin Yang, Xinkai Li, Yitao Weng, Xulong Ren, Qimao Qin, Jinjie Song, Zhenzhao Mo
{"title":"Temperature field simulation and experimental investigation for column-faced 45 steel via ultrafast electron beam scanning","authors":"Rong Wang,&nbsp;Zhenfei Song,&nbsp;Jiaxin Yang,&nbsp;Xinkai Li,&nbsp;Yitao Weng,&nbsp;Xulong Ren,&nbsp;Qimao Qin,&nbsp;Jinjie Song,&nbsp;Zhenzhao Mo","doi":"10.1016/j.surfcoat.2025.131802","DOIUrl":"10.1016/j.surfcoat.2025.131802","url":null,"abstract":"<div><div>Exploring precise remanufacturing methods for complex parts is of considerable practical significance for extending the service life of components. Herein, in this paper, the thickness of the composite reinforced layer and the microstructure of the polished layer formed in the electron beam polishing process of 45 steel cylinder are predicted by an innovative numerical simulation method. Results indicate that the thickness of the polished layer predicted by numerical simulation and experimental error is about 7 %. The melting zone is comprised of fine equiaxed crystals, slender columnar crystals, slender and fine cellular crystals from the surface to the inside, and the heat-affected zone is mainly composed of lath needle martensite. After polishing, the surface is smooth and the surface roughness is reduced from 7.32 μm to 0.76 μm. Moreover, the microhardness increased from 240 HV<sub>0.1</sub> to 714 HV<sub>0.1</sub>, which is approximately 3 times the hardness of the matrix. The wear volume decreased from 5.52 × 10<sup>7</sup> μm<sup>3</sup> to 3.44 × 10<sup>7</sup> μm<sup>3</sup>, and the wear resistance increased by 1.6 times. Under the effect of refined grain strengthening, the comprehensive mechanical properties of the polishing layer are significantly improved.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"497 ","pages":"Article 131802"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143143459","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
Correlation of roughness with surface properties of SS 304 and Inconel 718 substrates processed by plasma electrolytic polishing
IF 5.3 2区 材料科学
Surface & Coatings Technology Pub Date : 2025-02-01 DOI: 10.1016/j.surfcoat.2025.131770
K. Sushil , A. Raj , S.K. Jha , J. Ramkumar , C. Chandraprakash
{"title":"Correlation of roughness with surface properties of SS 304 and Inconel 718 substrates processed by plasma electrolytic polishing","authors":"K. Sushil ,&nbsp;A. Raj ,&nbsp;S.K. Jha ,&nbsp;J. Ramkumar ,&nbsp;C. Chandraprakash","doi":"10.1016/j.surfcoat.2025.131770","DOIUrl":"10.1016/j.surfcoat.2025.131770","url":null,"abstract":"<div><div>Although plasma electrolytic polishing (PeP) results in a superior surface finish, there are limited studies to establish the corresponding changes in the physical properties of the surface. We report the investigation on the changes in microstructural characteristics and the associated surface physical properties of SS 304 and Inconel 718 alloys, of identical initial roughness, due to processing by PeP. Optical profilometry revealed that PeP significantly reduced <span><math><msub><mrow><mi>R</mi></mrow><mrow><mi>a</mi></mrow></msub></math></span> from 0.238 <span><math><mi>μ</mi></math></span>m to 0.048 <span><math><mi>μ</mi></math></span>m for SS 304 and to 0.067 <span><math><mi>μ</mi></math></span>m for Inconel 718, producing a smoother and optically more reflective surface. Elemental analysis established the relative changes in the chemical composition due to PeP. The tribology tests revealed a slight reduction in friction coefficient and wear rate. Microhardness tests have indicated a marginal decrease in Vicker hardness for both alloys. The reduction in static contact angle showed the increment in the surface wettability due to polishing. This work also establishes that PeP can be used to tune the physical properties of the surface.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"497 ","pages":"Article 131770"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143143460","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
nc-MeB2/a-MPEA structured (HfMoNbZr)xTi1-xBy films for enhanced hardness, toughness and tribological performance
IF 5.3 2区 材料科学
Surface & Coatings Technology Pub Date : 2025-02-01 DOI: 10.1016/j.surfcoat.2025.131727
Jigang Xie , Yiming Ruan , Hao Du , Lin He , Jie Shi , Hengning Hu , Yun Chen , Liuquan Yang , Rui Shu
{"title":"nc-MeB2/a-MPEA structured (HfMoNbZr)xTi1-xBy films for enhanced hardness, toughness and tribological performance","authors":"Jigang Xie ,&nbsp;Yiming Ruan ,&nbsp;Hao Du ,&nbsp;Lin He ,&nbsp;Jie Shi ,&nbsp;Hengning Hu ,&nbsp;Yun Chen ,&nbsp;Liuquan Yang ,&nbsp;Rui Shu","doi":"10.1016/j.surfcoat.2025.131727","DOIUrl":"10.1016/j.surfcoat.2025.131727","url":null,"abstract":"<div><div>This study demonstrated the composite concept to precisely control the grain boundary composition to address TiB<sub>2</sub> films inherent brittleness. Such concept was realized by combining high-power impulse magnetron sputtering (HiPIMS) with direct current magnetron sputtering (dcMS). By employing an HfMoNbZr-HiPIMS/TiB<sub>2</sub>-dcMS co-sputtering configuration, we successfully replaced the B in the grain boundaries with a B-containing amorphous multi-principal element alloy (MPEA). The results showed that TiB<sub>2</sub> film deposited by dcMS alone typically had an overstoichiometric composition, with a B/Ti ratio of 2.96, and a relatively low hardness (<em>H</em>) of 26.6 ± 1.2 GPa. In contrast, the formation of a nanocomposite structure (nc-MeB<sub>2</sub>/a-MPEA, i.e., nanocrystalline MeB<sub>2</sub> (Me = HfMoNbZrTi) embedded in an amorphous MPEA matrix), with MeB<sub>2</sub> in-plane grain sizes ranging from 2 to 5 nm, increased the hardness to 41.8 ± 3.7 GPa, while also enhancing indentation fracture toughness and reducing wear rate. This strengthening mechanism was attributed to lattice distortion within the MeB<sub>2</sub> grains and the suppression of grain boundary sliding by the MPEA. In addition, density functional theory (DFT) calculations indicated that the higher bulk modulus (<em>B</em>) /shear modulus (<em>G</em>) ratio of the TM<sub>0.44</sub>Ti<sub>0.56</sub>B<sub>2</sub> (TM = HfMoNbZr) solid solution compared to TiB<sub>2</sub> suggested that the brittleness of the TM<sub>0.44</sub>Ti<sub>0.56</sub>B<sub>2</sub> solid solution was lower. This study paves a way for the structure design of diborides for various applications.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"497 ","pages":"Article 131727"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143143751","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
Enhancement of superhydrophobicity in Ni-WS2-PTFE composite coatings via magnetic coupling electrodeposition
IF 5.3 2区 材料科学
Surface & Coatings Technology Pub Date : 2025-02-01 DOI: 10.1016/j.surfcoat.2025.131731
Jianguo Liu, Yigong Guo, Zhanyu Wang, Xiao Xing, Gan Cui
{"title":"Enhancement of superhydrophobicity in Ni-WS2-PTFE composite coatings via magnetic coupling electrodeposition","authors":"Jianguo Liu,&nbsp;Yigong Guo,&nbsp;Zhanyu Wang,&nbsp;Xiao Xing,&nbsp;Gan Cui","doi":"10.1016/j.surfcoat.2025.131731","DOIUrl":"10.1016/j.surfcoat.2025.131731","url":null,"abstract":"<div><div>Superhydrophobic coatings are renowned for their self-cleaning and water-repellent properties, making them increasingly valuable in industrial and consumer applications. Despite their widespread adoption, further enhancement of superhydrophobic performance remains a significant challenge. In this study, we introduce a novel approach to enhance the superhydrophobic capabilities of a composite coating by electrodepositing a Ni-WS<sub>2</sub>-PTFE composite coating under an applied magnetic field, notably improving its hydrophobic properties. The coupling of magnetic and electric fields induces a reorganization of the crystalline phase of nanoparticles within the plating solution, directly influencing the hydrophobicity of the composite coating. The water contact angle of the obtained Ni-WS2-PTFE composite coating reached 154°, with a minimum sliding angle of 4°. The coating also demonstrated excellent hydrophobic performance in both acid-base and weight-loss tests. After four weeks of immersion in a 3.5 % NaCl solution, the composite coating retained a corrosion resistance efficiency of 95 %. Magnetic fields play a beneficial role in the preparation of superhydrophobic coatings. While coatings produced through electrodeposition alone are not inherently superhydrophobic, the introduction of magnetic fields during the process imparts these desirable properties.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"497 ","pages":"Article 131731"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143144176","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 preplaced graphene and graphite films on the substrate of Stellite 6 metallurgical coatings processed by PTA
IF 5.3 2区 材料科学
Surface & Coatings Technology Pub Date : 2025-02-01 DOI: 10.1016/j.surfcoat.2025.131734
João Felipe Sippel , Willian Rafael de Oliveira , Juliane Ribeiro da Cruz , Ana Sofia C.M. d'Oliveira
{"title":"Effect of preplaced graphene and graphite films on the substrate of Stellite 6 metallurgical coatings processed by PTA","authors":"João Felipe Sippel ,&nbsp;Willian Rafael de Oliveira ,&nbsp;Juliane Ribeiro da Cruz ,&nbsp;Ana Sofia C.M. d'Oliveira","doi":"10.1016/j.surfcoat.2025.131734","DOIUrl":"10.1016/j.surfcoat.2025.131734","url":null,"abstract":"<div><div>Protective coatings contribute to a longer and improved service life of equipment motivating the search for better coatings with new materials and efficient processing techniques. Carbon-based compounds are materials widely studied for their unique properties due to a variety of atomic arrangement. Tailoring metal matrix composites to improve performance through the distribution of carbon compounds in the matrix offers a competitive route to process coatings. Graphite and graphene powders were manually brushed on a rough substrate steel to modify Co based coatings processed by Plasma Transferred arc (PTA). An atomized Co based alloy was deposited on pre-placed films of graphene and graphite, respectively. The impact of the C compounds in hardfacing coatings was assessed by the geometry, dilution, microstructure, hardness and scratch tests. Results show similar microstructures and phases in coatings regardless of the presence of the preplaced C films. However, Co based coating deposited on preplaced graphene films exhibit larger dilution, lower hardness and a larger scratch scar compared to those processed without the C film. In contrast, depositing the Co based alloy on graphite films resulted on coatings with a higher hardness and scratch resistance inspite of the similar dilution to that of coatings processed on the stainless steel substrate. The measured behavior is associated with differences in the heat transfer at the interface with the substrate due to the thermal conductivity of the C film and its interaction with the plasma arc. Changes in the heat affected zone of each coating further sustain this understanding.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"497 ","pages":"Article 131734"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143144196","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
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