Surface & Coatings Technology最新文献

{"title":"Effects of sample bias on wear resistance of magnetron sputtered chromium coated zirconium alloy","authors":"Thais R. Netto ,&nbsp;Adele K. Evans ,&nbsp;David T. Goddard ,&nbsp;Jack L. Cooper ,&nbsp;Peter Kelly","doi":"10.1016/j.surfcoat.2025.131847","DOIUrl":"10.1016/j.surfcoat.2025.131847","url":null,"abstract":"<div><div>Research on accident-tolerant fuels (ATFs) for Light Water Reactors (LWRs) has focused on improving the safety of zirconium alloy fuel rods since the Fukushima accident in 2011. Additionally, normal LWR operating conditions cause fretting wear on the fuel rod surface, which requires tribological improvements. Chromium-based coatings on zirconium alloys are one of the most advanced concepts for developing a fuel that can withstand accidents. Both under operating conditions and when subjected to high-temperature steam, Zr alloys with protective coatings demonstrated improvements, compared to uncoated surfaces. This study aims to evaluate the effect of substrate bias on the structure and tribological properties of chromium films deposited by magnetron sputtering onto Zr alloy nuclear fuel rod cladding. The coatings were also characterised by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), atomic force microscopy (AFM), transmission electron microscopy (TEM) and optical profilometry. The hardness of the coating was measured with a nano-indenter. Initial finding indicates that the application of a low substrate bias of −50 V enhances film density and adhesion and also reduces the coating wear rates, in comparison to higher biases (−100 V to −150 V) or no applied bias.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"498 ","pages":"Article 131847"},"PeriodicalIF":5.3,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178854","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":"Synthesis and exploration of heat transfer properties in diamond-like carbon copper composite films deposited on stainless steel substrates","authors":"Mohd Sarim Khan,&nbsp;Lokendra Kumar Katiyar,&nbsp;C. Sasikumar","doi":"10.1016/j.surfcoat.2025.131871","DOIUrl":"10.1016/j.surfcoat.2025.131871","url":null,"abstract":"<div><div>This research article investigates the enhancement of heat transfer in stainless steel plates by augmenting the surface area and enhancing the thermal conductivity of the surface through the application of a-DLC:H in combination with copper layers. The increase in the surface area of the plate is achieved via surface mechanical attrition treatment (SMAT), while the a-DLC:H and copper coatings are applied using PECVD and PVD techniques, respectively. The application of SMAT on the surface before the deposition of the DLC/Cu composite film resulted in a substantial increase in surface area, reaching approximately 80 %, while also improving adhesion and thermal contact efficiency. A comprehensive examination of the growth morphologies demonstrated the development of ultra-fine nano-crystalline diamond (UNCD). The Raman spectra displayed a prominent peak at 1160 cm⁻¹, corresponding to sp³-bonded carbon representing D peak of nano-crystalline diamond. Additionally, a distinct Cu<img>O peak at 450 cm⁻¹ was observed, indicating atmospheric oxidation of copper on the surface. Surface profiling using a 3D profilometer and Raman mapping demonstrated a uniform coating across the surface with a thickness of 240 nm. The integration of SMAT and coating treatment led to a significant enhancement in heat flux, reaching 450 W/m². In contrast, uncoated surfaces exhibited a heat flux of 100 W/m², while DLC/Cu-coated surfaces without SMAT achieved a heat flux of 425 W/m². Additionally, thermal conductivity improved from 509 W/(m·K) for DLC/Cu-coated steel to 565 W/(m·K) for SMAT-treated, DLC/Cu-coated steel, indicating superior thermal performance due to the synergistic effects of increased surface area and coating.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"498 ","pages":"Article 131871"},"PeriodicalIF":5.3,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143179302","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":"Deposition of binary CrZr thin-film metallic glass using Cr/Zr dual-cathode high-power impulse magnetron sputtering","authors":"Chin-Chiuan Kuo,&nbsp;Yu-Tang Yin","doi":"10.1016/j.surfcoat.2025.131867","DOIUrl":"10.1016/j.surfcoat.2025.131867","url":null,"abstract":"<div><div>Closed-field magnetron Cr/Zr dual-cathode unipolar high-power impulse magnetron sputtering (HiPIMS) is used to deposit binary Cr<img>Zr alloy films of various compositions. The discharge voltage pulses of the Cr and Zr cathodes (targets) were synchronized with equal pulse widths, and the effects of the average discharge power of the target materials and substrate bias voltage on the composition, microstructure, mechanical strength, and electrical resistance of the deposited alloy films were determined. Varying the average power ratio of the targets provided a degree of control over the film composition. The deviation in the compositional Cr/Zr ratio in the films changed with the average discharge powers of the two targets owing to the contrasting dependence of the fractional deposition rate on the average discharge power ratio of the two elements. Most of deposited Cr<img>Zr films were primarily amorphous, and coatings with Cr contents &gt;82 %, &lt;32 %, or close to 67 % possibly are nanocrystalline or contained minor crystalline domains. Enhancing the negative substrate smoothened the film surface and reduced the columnar structure of the films, thereby increasing the hardness of the Cr-rich films. The film hardness and elastic modulus increased with the Cr fraction. All obtained Cr<img>Zr films exhibited relatively low electrical sheet resistances owing to the Cr fraction and substrate-bias-induced microstructure. The Cr₄₂Zr₅₈ thin films exhibited a thin-film metallic glass feature with a glass transition temperature of approximately 580 °C. The mechanical, structural, and electrical properties of the HiPIMS-deposited Cr<img>Zr alloy films are advantageous for applications requiring high corrosion resistance, wear resistances and low electrical conductivity, such as in biomedical and wearable devices.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"498 ","pages":"Article 131867"},"PeriodicalIF":5.3,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143180905","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":"Effect of nitrogen flow rates on the structural and properties of TiVCrNiSi(N) high entropy coating deposited by arc ion plating","authors":"Menghui Cui ,&nbsp;Xiaoyun Ding ,&nbsp;Yong Lian ,&nbsp;Yawen Wu ,&nbsp;Jinchao Jiao ,&nbsp;Yingchun Cheng ,&nbsp;Jinhan Yang ,&nbsp;Jin Zhang ,&nbsp;Yong Sun","doi":"10.1016/j.surfcoat.2025.131868","DOIUrl":"10.1016/j.surfcoat.2025.131868","url":null,"abstract":"<div><div>The TiVCrNiSi(N) high-entropy coatings were fabricated by adjusting nitrogen flow via arc ion plating. The microstructure, mechanics and high-temperature wear resistance of the coatings were studied. The results show that as the nitrogen flow rates (R_N2) increases, the coating always maintains the BCC structure, and all N exists in solid solution. An amorphous phase exists in all coatings, and the amorphous phase is dispersed in the BCC phase of the coating produced at R_N2 = 40 %. TiVCrNiSi high-entropy coating has the optimal adhesion (L_c2 = 54 N). As the nitrogen flow rates increases, the adhesion of TiVCrNiSi(N) alloy coating increases. The wear rate of TiVCrNiSi(N) coating decreases with increasing nitrogen flow rates. The wear rate of the coating deposited under a R_N2 of 40 % is 0.49 × 10⁻⁵ mm³/(N·m), which is only about 3 % of the Ti6Al4V substrate. The presence of amorphous phase effectively hinders crack propagation. As the nitrogen flow rates increases, the coating wear mechanism changes from abrasive wear to adhesive wear. Therefore, the TiVCrNiSi(N) high-entropy coating prepared by arc ion plating can effectively solve the problems of low hardness and poor high-temperature wear resistance of titanium alloy, and broadens the development path for titanium alloys in wear-resistant conditions.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"499 ","pages":"Article 131868"},"PeriodicalIF":5.3,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143224796","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":"Formation and performance of niobium silicide diffusion coatings dependence on the halide activators","authors":"Beatriz A. Pinto ,&nbsp;Osvaldo M. Cintho ,&nbsp;Nabil Chaia ,&nbsp;Ana Sofia C.M. d'Oliveira","doi":"10.1016/j.surfcoat.2025.131859","DOIUrl":"10.1016/j.surfcoat.2025.131859","url":null,"abstract":"<div><div>Nb silicide coatings were processed by HAPC on commercially pure Nb substrates using the activating halides NH₄F, NH₄Cl, and NaF. Thermodynamic calculations were performed for different activators, together with the analysis of the processed coatings. It is shown that although NH₄Cl allows to form more Si halides, coating thickness is strongly impacted by the magnitude of the partial pressures of the halides favoring NH₄F to process thicker coatings. The higher stability NaF accounts for the scarce formation of halides and a dual-layer of NbSi₂ and Nb₅Si₃ coatings. Regardless of the activator used, coatings exhibit elongated grains. Processing with NH₄F led to a combination of larger oriented grains and smaller grains contrasting with the high hardness coatings processed with NaF, which feature finer grains and equiaxed grains in the intermediate Nb₅Si₃ layer. Thermogravimetric analysis up to 1350 °C revealed a higher mass gain with two growth stages for thick coatings processed with NH₄F, a parabolic behavior for the coatings processed with NH₄Cl and with NaF with superior performance for the latter. Isothermal oxidation at 1100 °C for 2 h showed the formation of Nb₂O₅ and SiO₂ under all processing conditions. Despite the small thickness and the presence of a mixed oxide film coatings processed with NaF are more suitable for equipment operating at high temperatures for extended periods.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"498 ","pages":"Article 131859"},"PeriodicalIF":5.3,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143180902","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":"Isothermal oxidation behavior of HVAF-sprayed NiCoCrAlY coatings","authors":"K. Bobzin,&nbsp;H. Heinemann,&nbsp;K. Jasutyn,&nbsp;C. Tan","doi":"10.1016/j.surfcoat.2025.131861","DOIUrl":"10.1016/j.surfcoat.2025.131861","url":null,"abstract":"<div><div>The functionality of the NiCoCrAlY coatings as oxidation protection or as a bond coat for thermal barrier coatings depends significantly on the oxide content and the microstructure. This study focuses on the development of NiCoCrAlY coatings with reduced porosity and oxide content using the AC-HVAF process, utilizing both coarse and fine powders. A CFD simulation model of HVAF process, validated by LDA measurements, was utilized to study the particle in-flight behavior of coarse and fine NiCoCrAlY powders. The process parameters derived from the simulation were applied for the deposition of the coatings on nickel-based superalloy substrates. Subsequently, the coatings were subjected to isothermal oxidation at 1000 °C in air. The microstructure of the coatings was analyzed both in the as-sprayed state and after the oxidation test. In addition, the morphology and thickness of the oxide scale were characterized by SEM, EDS and XRD. The oxidation kinetics were determined by measuring the thickness of the thermally grown oxides (TGO). The results showed that employing a relatively short stand-off distance d_s = 200 mm determined from the simulation results resulted in dense coatings for both powder fractions. Both coatings exhibited higher oxide content compared to conventional HVAF processes due to the near-stoichiometric ratio required for process stability, which resulted in elevated process temperatures. Nevertheless, the developed NiCoCrAlY coatings displayed good oxidation resistance even without vacuum heat treatment, as indicated by the sub-parabolic growth rate of the TGO.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"498 ","pages":"Article 131861"},"PeriodicalIF":5.3,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143179731","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}

{"title":"Microstructure, wear and corrosion behavior of AZ91D magnesium alloys fabricated by laser surface-modification","authors":"Boxiang Hong ,&nbsp;Duncai Bao ,&nbsp;Chenfeng Yuan ,&nbsp;Lipeng Jiang ,&nbsp;Qian Li ,&nbsp;Xun Zhang ,&nbsp;Xiang Li ,&nbsp;Zhaoxue Deng","doi":"10.1016/j.surfcoat.2025.131863","DOIUrl":"10.1016/j.surfcoat.2025.131863","url":null,"abstract":"<div><div>Magnesium alloys has been presented to have promising application value. Their use, however, is severely hindered by their poor wear and corrosion resistance. Herein, the Ti₃Ni_2.5Al₂Cu_2.5 medium entropy alloy (MEA) coating with good metallurgical properties have been successfully prepared on the surface of AZ91D magnesium alloy by laser cladding. Furthermore, the Cu-Al transition layer was further designed to overcome the problem of high dilution rate in the cladding process. A systematic analysis was performed on the microstructure, element distribution, microhardness, wear behavior and corrosion resistance. The results showed that the Cu-Al transition layer was composed of Cu₃Al₂, AlCuMg and Cu₂Mg phases and it could effectively solve the problems of micro-cracks and magnesium dilution caused by cladding of high melting point material. The phase composition of the top layer in Ti₃Ni_2.5Al₂Cu_2.5 MEA coating included BCC structural phase, B2 structural phase and (Cu, Ni) Ti intermetallic compound. The microhardness of Ti₃Ni_2.5Al₂Cu_2.5 MEA coating was 562.45 ± 15.02 HV_0.3, which was about 9 times higher than that of the substrate (60.05 ± 9.02 HV_0.3). More remarkable, the prepared MEAs coating significantly improve the corrosion and wear resistance ability of the AZ91D substrate.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"498 ","pages":"Article 131863"},"PeriodicalIF":5.3,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143179410","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":"Influence of oxygen flow on the structure, chemical composition, and dielectric strength of AlxTayOz thin films deposited by pulsed-DC reactive magnetron sputtering","authors":"Richard Drevet ,&nbsp;Pavel Souček ,&nbsp;Pavel Mareš ,&nbsp;Pavel Ondračka ,&nbsp;Matej Fekete ,&nbsp;Martin Dubau ,&nbsp;Petr Vašina","doi":"10.1016/j.surfcoat.2025.131865","DOIUrl":"10.1016/j.surfcoat.2025.131865","url":null,"abstract":"<div><div>This research aims to study the structure, chemical composition, and dielectric strength of aluminum tantalum oxide (Al_xTa_yO_z) thin films deposited on silicon and steel substrates by pulsed direct current reactive magnetron sputtering. Four targets containing different concentrations of aluminum and tantalum are sputtered in an argon‑oxygen atmosphere to produce ternary oxide thin films of Al_xTa_yO_z. Argon flow is maintained at 60 sccm during the depositions, and several oxygen flows ranging from 5.0 to 39.6 sccm are studied. The change in oxygen flow rate modifies the structure, chemical composition, and dielectric strength of the deposited oxide thin films. The deposition rate of the films is impacted as well. All these properties are also studied for aluminum oxide (Al_xO_z) and tantalum oxide (Ta_yO_z) thin films deposited in the same experimental conditions as a reference. The binary and ternary oxide thin films are dense, uniform, and poorly crystalline. The concentrations of aluminum, tantalum, and oxygen in the thin films depend on both the sputtered target composition and the oxygen flow utilized during deposition. The dielectric strength of the thin films is also oxygen flow dependent. Intermediate oxygen flows are the most efficient to produce Al_xTa_yO_z thin films with high dielectric strengths. The highest dielectric strength of 340 ± 50 V·μm⁻¹ was obtained for 90 at.% Al/10 at.% Ta target composition and 20 sccm O₂ flow. The experimental results show that the increased tantalum content in the sputtered target mitigates the effect of poisoning and arcing and increases the deposition rate of Al_xTa_yO_z thin films.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"498 ","pages":"Article 131865"},"PeriodicalIF":5.3,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178846","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":"Air plasma sprayed multi-material composite coatings for enhanced light absorption and thermal emission","authors":"Nadimul Haque Faisal ,&nbsp;Vinooth Rajendran ,&nbsp;Siva Kaniapan ,&nbsp;Vinoth Ramalingam ,&nbsp;Anil Prathuru ,&nbsp;Rehan Ahmed ,&nbsp;Nirmal Kumar Katiyar ,&nbsp;Aakash Bansal ,&nbsp;Thomas Whittaker ,&nbsp;Patrick Isherwood ,&nbsp;Will Whittow ,&nbsp;Mohamed Egiza ,&nbsp;Saurav Goel","doi":"10.1016/j.surfcoat.2025.131854","DOIUrl":"10.1016/j.surfcoat.2025.131854","url":null,"abstract":"<div><div>This study pioneers a transformative approach to solar thermal technology by leveraging air plasma-sprayed (APS) multi-material composite coatings. It is to achieve unprecedented light absorption and thermal emission, redefining the design paradigm for bi-layer coatings in solar thermal applications. For the first time, both single-layer (Mo-Mo₂C/ceramic, NiO/YSZ) and bi-layer (NiO/YSZ with an additional 8YSZ top layer) coatings on Hastelloy®X substrate were systematically compared using an extensive suite of characterisation techniques, including scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), optical spectroscopy, infrared thermography, surface roughness, sheet resistance, electrical conductivity, dielectric constant measurements and water absorbency tests. The bi-layer NiO/YSZ + 8YSZ coating with the highest surface roughness demonstrated remarkable light absorption and thermal emission properties. With a minimal light reflectance of 0.1 and a high thermal emittance of 0.961, this configuration achieved superior solar energy capture and efficient heat re-emission, outperforming single-layer coatings with a moderate reflectance of 0.2 to 0.6. Additionally, the Mo-Mo₂C/ZrO₂ coating revealed unique spectral behavior with enhanced reflectance in the infrared region, indicating its potential for niche applications. Moreover, the NiO/YSZ + 8YSZ and NiO/YSZ coatings configuration also exhibited minimal water absorbency due to its fine microstructure, characterised by small pore sizes and low surface-connected porosity. These findings establish the bi-layer NiO/YSZ + 8YSZ coating as a groundbreaking advancement in thermal-sprayed materials, offering exceptional solar selective and thermal emission properties. This work underscores the transformative potential of APS techniques in developing next-generation coatings tailored for optimised solar thermal applications.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"498 ","pages":"Article 131854"},"PeriodicalIF":5.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143180907","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}

{"title":"The effect of heat treatment on promoting the precipitation of Al2Cu and its influence on the tribological properties of plasma-sprayed AlSi30Cu5 coating","authors":"Guowei Yang ,&nbsp;Jiahao Zhang ,&nbsp;Jingkun Li ,&nbsp;Binguo Fu ,&nbsp;Boya Li","doi":"10.1016/j.surfcoat.2025.131852","DOIUrl":"10.1016/j.surfcoat.2025.131852","url":null,"abstract":"<div><div>To further enhance the wear resistance of AlSi30 coating, this study introduced Cu element, which could react with Al to form θ-Al₂Cu reinforcing phases. Plasma spraying technology was utilized to prepare both AlSi30 and AlSi30Cu5 coatings, and the AlSi30Cu5 coating underwent appropriate heat treatment (330 °C for 24 h). Subsequently, wear resistance tests were conducted on the AlSi30, AlSi30Cu5, and heat-treated AlSi30Cu5 (HT-AlSi30Cu5) coatings at room temperature and high temperature (210 °C). The impact mechanism of heat treatment on the precipitation of θ-Al₂Cu and its influence on tribological properties were discussed in detail. The results indicated that, compared to the AlSi30 and AlSi30Cu5 coatings, the HT-AlSi30Cu5 coating exhibited reduced porosity, a denser microstructure, and smoother and rounded Si phases without significant size increase. After aging heat treatment, a large number of submicron-sized θ-Al₂Cu high-temperature stable reinforcing phases precipitated within the AlSi30Cu5 coating, providing significant dispersion strengthening to the coating. This is a crucial factor enabling the HT-AlSi30Cu5 coating to maintain excellent wear resistance at both room temperature and 210 °C, improving by 51 % and 38 % respectively compared to the AlSi30Cu5 coating.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"498 ","pages":"Article 131852"},"PeriodicalIF":5.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143180371","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}