Surface & Coatings Technology最新文献

{"title":"Influence of high-voltage argon ion bombardment on the adhesion and friction properties of GLC coatings and its application in friction and noise reduction for heavy-load gears","authors":"Jinke Yu ,&nbsp;Shubing Hu ,&nbsp;Shasha Quan ,&nbsp;Xiaoguang Fan ,&nbsp;Junping Zhao ,&nbsp;Jiyuan Liu ,&nbsp;Hong Ya Li ,&nbsp;Yixuan Huang ,&nbsp;Yefei Chen","doi":"10.1016/j.surfcoat.2025.132323","DOIUrl":"10.1016/j.surfcoat.2025.132323","url":null,"abstract":"<div><div>In this study, polished and shot-peened carburized substrates, pretreated with high-voltage argon ion bombardment (2800 V), were then coated using the physical vapor deposition method at bias voltages of −40 V, −60 V, and − 80 V. The microstructure and mechanical properties of the coating were analyzed. The results showed the adhesion strength of polished substrates initially increases with increasing bias voltage and then decreases, the coating prepared at a bias voltage of −60 V exhibited superior wear resistance and the best performance, with adhesion strengths of 93.4 N for polished substrate and 65.7 N for shot-peened substrate. However, when high-voltage argon ion bombardment was removed, the adhesion strength significantly declined. The interface analysis between the substrate and the Cr interlayer revealed that the absence of argon ion bombardment resulted in an amorphous layer formed at the interface, which weakened the adhesion between the substrate and the Cr layer. In contrast, after argon ion bombardment, the amorphous Cr layer disappeared, and a semi-coherent interface was formed between the substrate and the Cr interlayer, resulting in enhanced adhesion. Additionally, the argon ion bombardment activated the substrate surface, increasing the nucleation rate, thickness, and growth uniformity of the Cr layer, thereby providing a robust foundation for subsequent coating growth. As a result, the coating exhibited fewer internal defects and superior comprehensive performance. The optimal coating was applied to the gears in a heavily loaded 14-speed gearbox, and the results showed that coating could effectively help to reduce noise, improve transmission efficiency, prevent pitting, thereby extending gear lifespan.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"512 ","pages":"Article 132323"},"PeriodicalIF":5.3,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154985","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":"Investigation on microstructure evolution and corrosion behavior of FeCoCrNiMoCuxSi0.2 high entropy alloy coating produced by laser cladding","authors":"Zhepeng Song,&nbsp;Jing Liu,&nbsp;Chunwei Li,&nbsp;Yongfeng Li,&nbsp;Xiujie Xia,&nbsp;Jian Zhang","doi":"10.1016/j.surfcoat.2025.132313","DOIUrl":"10.1016/j.surfcoat.2025.132313","url":null,"abstract":"<div><div>FeCoCrNiMoCu_xSi_0.2 (x = 0.4, 0.6 and 0.8) HEA coatings were prepared on SUS304 steel by laser cladding. The effects of Cu content on microstructure evolution and corrosion resistance of the coatings were studied. The results revealed that the FeCoCrNiMoCu_xSi_0.2 coatings were primarily composed of FCC solid solution, MoSi₂, and FeMoSi phases. With the increase in Cu content, the alloy coating transitioned from a dendritic morphology to a large-area eutectic structure, with a significant reduction in dendrite size. Notably, the Cu_0.8 alloy achieved the finest eutectic lamellar spacing of 200–300 nm. The Cu_0.6 alloy demonstrated the optimal corrosion resistance, featuring the lowest corrosion current density (5.99 × 10⁻⁸ A·cm⁻²) and the widest passivation range (1.09 V). Additionally, the passivation film formed on the Cu_0.6 alloy surface, primarily composed of high-valent oxides and hydroxides, effectively enhanced charge transfer resistance and impeded Cl⁻ penetration. The excessive Cu addition led to Cu-rich phase segregation at the grain boundaries of the Cu_0.8 alloy, increasing the localized potential difference and significantly heightening pitting susceptibility.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"511 ","pages":"Article 132313"},"PeriodicalIF":5.3,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144115645","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":"Improving corrosion inhibition of steel using polyurethane based composite coatings by incorporating zirconia nanoparticles and novel urea-based inhibitor","authors":"Sehrish Habib ,&nbsp;Samra Zafar ,&nbsp;Mohanad Shkoor ,&nbsp;Mazen Khaled ,&nbsp;Ibnelwaleed A. Hussein ,&nbsp;Elsadig Mahdi Ahmed ,&nbsp;Abdulilah Dawoud ,&nbsp;R.A. Shakoor","doi":"10.1016/j.surfcoat.2025.132316","DOIUrl":"10.1016/j.surfcoat.2025.132316","url":null,"abstract":"<div><div>Corrosion of steel in aggressive environments poses a major threat to structural integrity and operational efficiency across various industries. To address this, the present study introduces a novel polyurethane (PU)-based composite coating reinforced with zirconia (ZrO₂) nanoparticles integrated with an in-house synthesized urea-based organic corrosion inhibitor, 1,1′-(methylenebis(4,1-phenylene))bis(3-(pyridin-2-ylmethyl)urea) (MS31). This multifunctional coating system leverages the mechanical durability of PU, the barrier-enhancing role of ZrO₂ nanoparticles, and the smart, pH-responsive release characteristics of MS31 to provide active and passive corrosion protection. The composite coatings were applied to steel substrates and evaluated under simulated saline conditions (3.5 wt% NaCl). Characterization techniques including FTIR, TGA, UV–Vis spectroscopy, and contact angle measurements confirmed the successful integration of MS31, thermal stability up to 800 °C, pH-triggered inhibitor release, and hydrophobic surface behavior. Adhesion testing further demonstrated improved mechanical interlocking with the steel surface. Electrochemical analyses, including Tafel polarization and electrochemical impedance spectroscopy (EIS), revealed significantly enhanced corrosion protection relative to unmodified PU coatings, while salt spray testing validated long-term performance under corrosive exposure. This work demonstrates a robust and environmentally adaptive coating system that combines physical barrier properties with active corrosion inhibition. The integration of MS31-loaded ZrO₂ nanoparticles into the PU matrix not only improves the structural and protective features of the coating but also introduces a smart, responsive mechanism for corrosion control. These findings offer a promising pathway toward the development of sustainable, high-performance coatings for steel protection in harsh environments.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"511 ","pages":"Article 132316"},"PeriodicalIF":5.3,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135105","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 the non-uniformed growth of TGO on dynamic stress evolution in realistic TC/TGO interface of MCrAlY-YSZ TBCs during thermal cycling","authors":"Lei Zhang ,&nbsp;Shutao Chen ,&nbsp;Chuntang Yu ,&nbsp;Zhansheng Yu ,&nbsp;Chengyang Jiang ,&nbsp;Shuai Li ,&nbsp;Zebin Bao ,&nbsp;Guozheng Quan ,&nbsp;Shenglong Zhu ,&nbsp;Fuhui Wang","doi":"10.1016/j.surfcoat.2025.132319","DOIUrl":"10.1016/j.surfcoat.2025.132319","url":null,"abstract":"<div><div>Thermal Barrier Coatings (TBCs) are widely applied to the blade of aero-engine to effectively prevent them from high-temperature oxidation. This work obtained the real TC/TGO interface topography accurately by using threshold image processing technology, and established the TGO growth control equation based on oxygen diffusion distribution. Results showed that the non-uniform growth and thickening of TGO significantly affect the stress distribution and failure behavior of the TBCs during thermal cycling test. Besides, the effect of the non-uniform growth of TGO on the crack initiation of TBCs was discussed in detail.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"511 ","pages":"Article 132319"},"PeriodicalIF":5.3,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144139551","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":"Electrochemical corrosion behavior of thin and thick WC-10Co-4Cr coatings deposited by HVAF thermal spray technique","authors":"D. Vijaya Lakshmi ,&nbsp;P. Suresh Babu ,&nbsp;Nitin P. Wasekar ,&nbsp;G. Sivakumar ,&nbsp;M.J.N.V. Prasad","doi":"10.1016/j.surfcoat.2025.132318","DOIUrl":"10.1016/j.surfcoat.2025.132318","url":null,"abstract":"<div><div>The deposition of high-performance thinner coatings (~50 μm of thickness) via thermal spray techniques, as an alternative to hard chrome (HCr) plating, lies in the selection of a suitable spray system, feedstock size range and proper selection of the process parameters. In this study, thin coatings of WC-10Co-4Cr cermet were deposited using high velocity air-fuel (HVAF) spray technique by employing −15/+5 μm feedstock and by varying the spray torch and nozzle combinations. A 3.5 wt% NaCl medium was used to assess the electrochemical corrosion response of coatings. The electrochemical corrosion results indicated that the corrosive attack begins with the (Co<img>Cr) binder phase leaching and formation of a pseudo-passive layer consisting of Co, Cr and/or W oxides. Mott-Schottky tests were carried out on selected specimens to study the corrosion-resistant behavior of the passive film formed. The thin coatings of the present study exhibited ~2 to 4 times of superior corrosion resistance than that of conventional thicker WC-10Co-4Cr coatings (deposited with −30/+10 μm particle size) highlighting the protective nature of the thin coatings sprayed using fine feedstock. Additionally, the corrosion performance of the as-sprayed thin cermet coating was compared with that of HCr coating of similar thickness to evaluate the potential of thin coatings as a suitable replacement for HCr.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"511 ","pages":"Article 132318"},"PeriodicalIF":5.3,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135109","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":"Microstructure, properties and tribological behaviors of TiNbZr refractory medium-entropy alloy coating fabricated on the Ti6Al4V substrate by laser cladding","authors":"Jin Liu ,&nbsp;Ruipeng Han ,&nbsp;Yan Liu ,&nbsp;Jingqing Chen ,&nbsp;Yongsheng Zhao ,&nbsp;Dengwen Hu ,&nbsp;Chuan Yang ,&nbsp;Lei Wang ,&nbsp;Hui Chen","doi":"10.1016/j.surfcoat.2025.132317","DOIUrl":"10.1016/j.surfcoat.2025.132317","url":null,"abstract":"<div><div>In order to enhance the wear resistance of the Ti6Al4V alloy at both room temperature (RT) and elevated temperature, thereby promoting the lightweight application of titanium alloys in high-speed train braking systems, a TiNbZr refractory medium-entropy alloy (RMEA) was deposited on the surface of the Ti6Al4V substrate by laser cladding. Subsequently, the tribological behavior of the TiNbZr RMEA coating and the Ti6Al4V substrate was analyzed at RT and 700 °C. The phase, microstructure and wear mechanism of the TiNbZr RMEA coating and the Ti6Al4V substrate were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), electron backscatter diffraction (EBSD) and X-ray photoelectron spectroscopy (XPS). The findings indicate that the TiNbZr RMEA coating is a single-phase body-centered cubic (BCC) disordered solid solution, exhibiting high strength, plasticity and high bonding strength. The tribological behavior demonstrates that the TiNbZr RMEA coating exhibits excellent wear resistance at both RT and elevated temperatures. This can be attributed to the fact that the Ti6Al4V substrate is predominantly subjected to abrasive abrasion, whereas the TiNbZr RMEA coating is subject to a combination of abrasive mechanisms, including adhesive and oxidation abrasion. In the repeated friction process, the oxides (TiO₂, Nb₂O₅, ZrO₂, and CuO) and material transfer (Cu, Fe, and Cr from the friction pair) on the surface of the TiNbZr RMEA coating sinter together to form a “glaze layer”. This layer acts as a lubricant and barrier, reducing the coefficient of friction (CoF) and significantly improving wear resistance.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"512 ","pages":"Article 132317"},"PeriodicalIF":5.3,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144138409","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":"Feasibility study of NiCoCrFeAl0.8Si0.1(NbMoTaW)0.1 denary alloy as a bond coat for thermal barrier coatings: from structural stability to high-temperature oxidation behavior","authors":"Zhuo Chen ,&nbsp;Yongzhi Jing ,&nbsp;Chao Zhang ,&nbsp;Xiufang Cui ,&nbsp;Wei Xu ,&nbsp;Xiang Wang ,&nbsp;Yongchao Fang ,&nbsp;Dechang Ma ,&nbsp;Guo Jin","doi":"10.1016/j.surfcoat.2025.132314","DOIUrl":"10.1016/j.surfcoat.2025.132314","url":null,"abstract":"<div><div>In this study, the feasibility of NiCoCrFeAl_0.8Si_0.1(NbMoTaW)_0.1 complex concentrated alloy as a bond coat for thermal barrier coatings (TBCs) was investigated. The alloy bond coat was prepared using plasma spraying technology and compared with the conventional NiCoCrAlY bond coat. The phase composition and microstructural changes of the NiCoCrFeAl_0.8Si_0.1(NbMoTaW)_0.1 alloy before and after plasma deposition were analyzed, and the thermal expansion coefficients, microhardness, and oxidation resistance of the two coatings were evaluated. Additionally, a Yttria-Stabilized Zirconia (YSZ) ceramic layer was deposited on the surfaces of both bond coats, forming a complete TBC system, and the evolution of the thermally grown oxide (TGO) layer was studied under different oxidation stages. Results indicate that after plasma spraying, the denary alloy bond coat maintains a single-phase BCC structure with slight compositional segregation, dense microstructure, and effective suppression of segregation of refractory elements due to its high aluminum content. The thermal expansion coefficient of the alloy is comparable to that of NiCoCrAlY, but its microhardness is nearly double that of NiCoCrAlY, with a more uniform hardness distribution. Oxidation testing at 1100 °C revealed that the TGO growth rate of the NiCoCrFeAl-based bond coat TBC is 36 % lower than that of the NiCoCrAlY-based system, demonstrating superior oxidation resistance. This improvement is attributed to the active elements such as Si, Nb, and Mo, which promote the formation of a protective Cr/Al dual-layer oxide film, effectively slowing down further oxidation, internal stress, and the formation of spinel. These findings suggest that the NiCoCrFeAl_0.8Si_0.1(NbMoTaW)_0.1 complex concentrated alloy has the potential to serve as a high-performance bond coat in TBC systems, providing superior oxidation resistance, thermal expansion matching, and mechanical integrity at high temperatures.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"512 ","pages":"Article 132314"},"PeriodicalIF":5.3,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170059","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":"Improving SiC surface properties by hyaluronic acid hydrogel deposition for neural probe applications","authors":"Scott Greenhorn ,&nbsp;Rachel Auzely ,&nbsp;Claude Verdier ,&nbsp;Matthieu Weber ,&nbsp;Isabelle Jeacomine ,&nbsp;Konstantinos Zekentes ,&nbsp;Edwige Bano ,&nbsp;Valérie Stambouli","doi":"10.1016/j.surfcoat.2025.132299","DOIUrl":"10.1016/j.surfcoat.2025.132299","url":null,"abstract":"<div><div>The reliability and long-term stability of neural probes after in vivo implantation depend first and foremost on the tissue-device interface, which can be improved by the development of hybrid inorganic/organic material interfaces. We report the deposition process of hyaluronic acid (HA) hydrogel film as a biomimetic polymer on amorphous SiC (a-SiC) film. This is a two-step process involving first the covalent immobilization of an azide-modified HA derivative (HA-N₃) which is followed by deposition of a cross-linked HA hydrogel film obtained by a strain-promoted azide-alkyne cycloaddition (SPAAC) reaction. Prior the a-SiC surface was modified with an amino-silane (APTES) enabling the covalent grafting of HA-N₃ on a-SiC. The step-by-step modification of the a-SiC surface properties has been investigated. The chemical modification is evidenced by XPS measurements and Raman spectra, which demonstrate the presence of an homogeneous HA film with expected chemical environments for C, N and O elements. The surface morphology modification is characterized by an increase of roughness going from 1 nm to 45 ± 3 nm (RMS). These changes in chemical composition and roughness result in an increase in wettability giving a low contact angle value of 26.4° with low dispersion, indicating that the HA layer is hydrophilic and homogeneous. The high initial stiffness of the a-SiC film is reduced by 10³, leading to a Young's modulus of ∼6 kPa obtained from nano-indentation measurements. This local AFM data was compared to the bulk rheological properties to get insights about deformation modes in the HA network. These preliminary results demonstrate the success of the process and pave the way for further experiments, which will focus on the in vitro and in vivo impact of the biopolymer coating on neural cell attachment and growth.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"512 ","pages":"Article 132299"},"PeriodicalIF":5.3,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170066","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":"Effects of stoichiometry and substrate temperature on the mechanical properties of (ZrxTa1−x)By films","authors":"Yung-I Chen ,&nbsp;Yu-Ting Ye ,&nbsp;Li-Chun Chang ,&nbsp;Ting-Kai Chang","doi":"10.1016/j.surfcoat.2025.132310","DOIUrl":"10.1016/j.surfcoat.2025.132310","url":null,"abstract":"<div><div>(Zr_<em>x</em>Ta_{1−<em>x</em>})B_<em>y</em> films with various stoichiometric ratios (<em>y</em>) and Zr/(Zr + Ta) ratios (<em>x</em>) were fabricated through cosputtering by using ZrB₂ and Ta or TaB₂ targets. The crystallinity of the fabricated films changed from amorphous to nanocrystalline and then crystalline as the stoichiometric ratio was increased, with these changes accompanied by improvements in the films' mechanical properties. Moreover, the hardness of near-stoichiometric (Zr_<em>x</em>Ta_{1−<em>x</em>})B_<em>y</em> films was enhanced to 36.6 GPa by increasing the substrate temperature to 400 °C during the deposition process. This process resulted in the crystal morphology changing from a nanoscale granular structure to a columnar structure. A Cr interlayer improved the adhesion of the aforementioned films to SUS304 stainless-steel substrates, and a soft CrN top layer enhanced the wear resistance of the (Zr_<em>x</em>Ta_{1−<em>x</em>})B_<em>y</em>/Cr/SUS304 assembly.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"511 ","pages":"Article 132310"},"PeriodicalIF":5.3,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144106015","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":"Thermal stability and abrasion resistance of NiCoCrAlYTa/Al2O3 gradient abrasive coating for blade tips by vacuum infiltration sintering","authors":"De Wang ,&nbsp;Jun Wang ,&nbsp;Gezhou Wang ,&nbsp;Wenqin Wang ,&nbsp;Huan Liu ,&nbsp;Xiaofeng Xiao ,&nbsp;Hua Li ,&nbsp;Zheng Fan","doi":"10.1016/j.surfcoat.2025.132312","DOIUrl":"10.1016/j.surfcoat.2025.132312","url":null,"abstract":"<div><div>NiCoCrAlYTa/Al₂O₃ gradient abrasive coatings with varying Al₂O₃ contents were fabricated on single crystal superalloy via vacuum infiltration sintering for the protection of blade tips. The oxidation resistance, thermal shock resistance, and abrasion resistance of the coatings were investigated. The results showed that the abrasion rate of the coating was reduced by 33 % and the oxidation mass gain was decreased by 10.85 % through the incorporation of Al₂O₃ particles. Additionally, the YAlO₃ compounds formed by the reaction between Al₂O₃ particles and the NiCoCrAlYTa matrix suppressed intergranular crack propagation, resulting in a 61.15 % reduction in crack density and enhanced thermal shock resistance of the coating. These findings highlight the application potential of NiCoCrAlY/Al₂O₃ gradient coatings in high-temperature sections of turbine engines.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"511 ","pages":"Article 132312"},"PeriodicalIF":5.3,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144115643","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}