Surface & Coatings Technology最新文献

{"title":"Effect of laser shock peening on the properties of Cr coatings on Zr alloy surfaces","authors":"Chuangming Ning ,&nbsp;Guocan Tang ,&nbsp;Shijia Yu ,&nbsp;Huazhuang Wu ,&nbsp;Junbo Zhou ,&nbsp;Bing Zeng ,&nbsp;Yuchun Wu ,&nbsp;Zhenbing Cai","doi":"10.1016/j.surfcoat.2025.132252","DOIUrl":"10.1016/j.surfcoat.2025.132252","url":null,"abstract":"<div><div>The coating prepared by physical vapor deposition technology will inevitably have some defects, such as pinholes, pores and so on. In this study, a low-energy laser shock peening (LE-LSP) technique was employed to post-treat Cr coatings with varying laser energies, both in absence and presence of an absorbing layer. The surface morphology, cross-sectional microstructure, crystal structure, and corrosion resistance of the Cr coatings were investigated before and after LE-LSP. The results show that the presence of the absorbing layer can avoid the ablation of the Cr coating surface and the generation of a large number of cracks. Compared with the untreated Cr coating, the number of droplet particles on the surface was reduced. The surface hardness increases with the increase of laser energy. The thickness of the coating decreases as the laser energy increases. After LE-LSP treatment, the crystal structure of the coating was significantly deformed, and the strength direction of the texture was also changed. The zirconium alloy substrate was also affected by LE-LSP. In the absence of an absorbing layer, the corrosion current density (<em>i</em>_{<em>corr</em>}) increases and the polarization resistance (<em>R</em>_<em>p</em>) decreases due to the formation of cracks on the surface and section of the coating after LE-LSP treatment. When an absorbing layer is present, the Cr coating becomes denser, the <em>i</em>_{<em>corr</em>} decreases and the <em>R</em>_<em>p</em> increases after LE-LSP treatment.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"511 ","pages":"Article 132252"},"PeriodicalIF":5.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931618","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":"Plasma surface engineering for triborrosion","authors":"Sonia P. Brühl","doi":"10.1016/j.surfcoat.2025.132235","DOIUrl":"10.1016/j.surfcoat.2025.132235","url":null,"abstract":"","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"508 ","pages":"Article 132235"},"PeriodicalIF":5.3,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144105928","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":"ICMCTF 2024 – 50th International Conference on Metallurgical Coatings and Thin Films","authors":"Esteban Broitman ,&nbsp;Sandra E. Rodil ,&nbsp;Juan A. Zapien ,&nbsp;Gregory Abadias","doi":"10.1016/j.surfcoat.2025.132226","DOIUrl":"10.1016/j.surfcoat.2025.132226","url":null,"abstract":"","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"508 ","pages":"Article 132226"},"PeriodicalIF":5.3,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144105929","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":"Introducing additive to KF-KOH electrolyte system for modification of PEO-coated in Mg alloy based on thickness-uniformity simulation","authors":"Mengjiao Jin ,&nbsp;Peng Zhang ,&nbsp;Weiyi Zhang ,&nbsp;Xiaoqian Sun ,&nbsp;Dan Liu ,&nbsp;Yunhui Du","doi":"10.1016/j.surfcoat.2025.132234","DOIUrl":"10.1016/j.surfcoat.2025.132234","url":null,"abstract":"<div><div>As regards PEO-coated in Mg Alloy, the optimal process parameters and concentrations of KF and KOH are obtained about coating thickness-uniformity in KF-KOH electrolyte system by COMSOL. Next, the optimal concentrations of additive Na₂SiO₃ and NaAlO₂ are separately simulated and the model accuracy is verified by experiments. The results show that this model is accurate and effective with errors &lt;10 % and thickness-uniformities &lt;12 %. Three optimal electrolytic systems are determined respectively as KF_-30g/L-KOH_-15g/L, Na₂SiO_3-40g/L-KF_-30g/L-KOH_-15g/L and NaAlO_2-15g/L -KF_-30g/L-KOH_-15g/L, and then three PEO coatings are prepared accordingly. By FIB and HRTEM, the phases in coating/matrix interface are all clearly exhibited to be bonded together as coherent and semi-coherent, giving rise to good corrosion resistances in coating. Introducing Na₂SiO₃ or NaAlO₂ to KF-KOH electrolyte, the thickness and the morphology in coating are both improved, which are the thickness increased by 73.9 % or 66.5 %, the surface porosity and the pore diameter reduced respectively by 56.8 % or 58.1 % and 57.1 % or 66.7 %. Thereinto, adding Na₂SiO₃ the increase of corrosion resistance is the most significant (I_corr decreased by 99.8 %, R_p increased by 119.9 %), and adding NaAlO₂ the promotion of wear resistance is the most outstanding (surface hardness increased by 123.6 % and wear rate decreased by 97.6 %). In this study, the optimal parameters can be effectively obtained by simulation in PEO, and the modification of coating can be achieved in a target way by introducing additive with characteristic.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"511 ","pages":"Article 132234"},"PeriodicalIF":5.3,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931701","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":"Super-hard yet tough and self-lubricating (TiZrHfNbTa)CxNy high entropy carbonitride films deposited by magnetron sputtering","authors":"Zhiying Lv ,&nbsp;Hongshu Jin ,&nbsp;Fanyong Zhang ,&nbsp;Ruibin Zhao ,&nbsp;Senlong He ,&nbsp;Fuxing Yin","doi":"10.1016/j.surfcoat.2025.132241","DOIUrl":"10.1016/j.surfcoat.2025.132241","url":null,"abstract":"<div><div>Traditional carbide or nitride films possess hardness and wear resistance but lack ideal toughness. C<img>N co-doped high-entropy alloys can achieve a good hardness-toughness combination. In this study, (TiZrHfNbTa)C_xN_y films (HECN) were deposited via reactive magnetron sputtering. With increasing R_N, N content rose to 39 at.%, and C content decreased and stabilized at 25 at.%. At R_N = 6.5 % and 13 %, C/N and Me/(C + N) ratios were approximately 1:1. HECN films transform from amorphous to FCC nano-crystallization with (111) orientation. At R_N = 13 %, super-hardness of 39.9 GPa and excellent fracture toughness (&gt;1.92 MPa·m^1/2) was achieved. Due to tribo-induced C-enrichment, the film showed self-lubrication with a low wear rate (1.3 × 10^-6 mm³/Nm) and a friction coefficient (0.15–0.2).</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"510 ","pages":"Article 132241"},"PeriodicalIF":5.3,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143921622","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":"Machine learning-driven design of BCC phase FeCrVTiMoxSiy high-entropy alloy coatings with high hardness to enhance wear resistance","authors":"Shouyuan Lin ,&nbsp;Yuan Yao ,&nbsp;Guanghui Shi ,&nbsp;Yanyan Liu ,&nbsp;Zhongping Yao ,&nbsp;Songtao Lu ,&nbsp;Wei Qin ,&nbsp;Xiaohong Wu","doi":"10.1016/j.surfcoat.2025.132238","DOIUrl":"10.1016/j.surfcoat.2025.132238","url":null,"abstract":"<div><div>High-entropy alloys (HEAs) have been widely considered as promising materials to protect the Ferritic/Martensitic (F/M) steels against the extreme environments in the lead-cooled fast reactors (LFR). Due to the wide diversity of elemental compositions and ratios, the rational design of HEAs with high wear resistance remains a huge challenge. In this work, we employed machine learning (ML) methods to guide the design of HEAs with high wear resistance as the protective coating for the F/M steels. The ML-based models were constructed to predict the phase structure and hardness of HEAs. The constructed SVM and XGBoost models exhibited the best performance in predicting the phase classification and the Vickers hardness of HEAs, respectively. Valence electron concentration (<em>VEC</em>) and Δ<em>H</em>_mix are identified as the most important factors affecting both the phase structures and Vickers hardness of HEAs. With these models, the FeCrVTiMo_xSi_y HEAs were predicted to exhibit a BCC phase and increasing hardness with the decreased ratio of Mo and Si elements. The following experimental results showed that FeCrVTiMo_0.5Si_1.5 exhibited optimal wear resistance with Vickers hardness, Young's modulus, H/E, H³/E², and wear rate of 732.65 HV, 289.6 GPa, 0.0353, 0.0127 GPa, and 8.65 × 10⁻⁷ mm³/(N·m), respectively. Density functional theory (DFT) calculations revealed that decreasing the ratios of Mo and Si elements in FeCrVTiMo_xSi_y HEAs increases lattice distortion and increases the proportion of covalent bonds to enhance solid-solution strengthening, improving wear resistance. This work presents a paradigm shift in quantifying the relationship between elemental compositions and the properties of HEAs.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"511 ","pages":"Article 132238"},"PeriodicalIF":5.3,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931702","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 substrate variables on the interface fracture energy of thermal spray coatings","authors":"Saim Abbas ,&nbsp;Sanjay Sampath ,&nbsp;Sudhanshu Mallick ,&nbsp;B. Nagamani Jaya","doi":"10.1016/j.surfcoat.2025.132237","DOIUrl":"10.1016/j.surfcoat.2025.132237","url":null,"abstract":"<div><div>The effects of substrate material, substrate roughness and substrate thickness on the interface fracture energy (<em>G</em>_<em>C</em>) of thermal spray coating/metallic substrate interfaces are determined. Air Plasma Sprayed (APS) coatings of Yttria Stabilized Zirconia (YSZ) and Alumina, as well as NiCrAlY are investigated with different substrate materials (stainless steel-SS, mild steel-MS), roughness and thickness. Modified cantilever beam bending with Digital Image Correlation (DIC) based tracking of crack length is used for high-throughput measurements. A 46 % increase in <em>G</em>_<em>C</em> is seen due to an increase of 73 % substrate roughness (<em>R</em>_<em>a</em>) of substrate for YSZ/SS, while a 60 % increase in <em>G</em>_<em>C</em> is seen due to an increase in 166 % <em>R</em>_<em>a</em> of substrate for Alumina/MS system. Interface fracture energy <em>G</em>_<em>C</em> of YSZ/MS is found to be ∼75 <em>J/m</em>^<em>2</em>, compared to ∼50 <em>J/m</em>^<em>2</em> for the Alumina/MS for similar coating/substrate thickness as well as substrate roughness. For the same coating type and thickness of YSZ, <em>G</em>_<em>C</em> decreased to 60 <em>J/m</em>^<em>2</em> when the substrate was changed to SS, even with an increase in <em>R</em>_<em>a</em>. This could be attributed to the significant effect of residual stress, originating from thermal expansion mismatch, with higher compressive residual stresses increasing the propensity for interfacial delamination. There is no effect of substrate thickness on <em>G</em>_<em>C</em>, independent of whether the substrate is machined before or after the deposition. Mechanisms of these changes are discussed in the context of total interface fracture area and crack closure stresses.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"510 ","pages":"Article 132237"},"PeriodicalIF":5.3,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143907912","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 and oxidation behavior of the aluminized coating on K447A nickel-based superalloy prepared by AlF3-activated pack cementation","authors":"Yuhang Zhao ,&nbsp;Kai Zhou ,&nbsp;Xin Xin ,&nbsp;Xijun Zeng ,&nbsp;Xiping Guo ,&nbsp;Yanqiang Qiao","doi":"10.1016/j.surfcoat.2025.132236","DOIUrl":"10.1016/j.surfcoat.2025.132236","url":null,"abstract":"<div><div>The function of AlF₃ activator, the aluminized coating formation mechanism on K447A nickel-based superalloy during the pack cementation process, and their oxidation behaviors have been systematically investigated. Comprehensive characterization by XRD, SEM, TEM and EDS analyses with HSC thermochemical calculation reveals four key findings: AlF₃ demonstrates the optimal aluminizing capability and generates active Al atoms via the disproportionation reaction of AlF gas. The aluminized coating exhibits a multilayer structure, with the outer layer composed of high Al content Ni₂Al₃ or NiAl₃ and the inner layer consisting of NiAl. Precipitated phases such as α-(Cr, W), σ phase, and carbides are distributed in the aluminides, confirming an Al-dominated inward diffusion mechanism characteristic of a “high-activity” process. The coating thickness exhibits linear relationships to the reciprocal of temperature and holding time. Ni₂Al₃ is formed before NiAl, transforms into NiAl, and then is regenerated. After oxidizing at 1150 °C for 100 h, a protective ridged α-Al₂O₃ scale forms on the aluminide coating, effectively shielding the substrate.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"510 ","pages":"Article 132236"},"PeriodicalIF":5.3,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143921621","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":"Achieving a self-densified conversion coating architecture by the bath composition design towards a multi-step nucleation pathway","authors":"Siyu Sun ,&nbsp;Yuxin Zhang ,&nbsp;Jiaxi Liu ,&nbsp;Ruoyun Lei ,&nbsp;Peng Zhou ,&nbsp;Fuhui Wang ,&nbsp;Li Xin ,&nbsp;Tao Zhang","doi":"10.1016/j.surfcoat.2025.132225","DOIUrl":"10.1016/j.surfcoat.2025.132225","url":null,"abstract":"<div><div>Achieving a self-densified conversion coating on magnesium alloy is the ultimate goal for a prolonged service life. Such a goal should be achieved by modulating the nucleation process, which poses the greatest challenge. In this work, a new designing rationale for the conversion bath was proposed to facilitate a multi-step nucleation process by thermodynamic calculations, thereby reducing coating defects and improving corrosion resistance. The selection of cation candidates should comply with the following rules: firstly, the solubility product (<em>K</em>_sp) value should be low enough for precipitation; secondary, the <em>K</em>_sp values among different species should not deviate significantly from each other. The phosphate conversion bath was used as an example to validate the idea. Results demonstrate that a self-densified conversion coating architecture when Mn- and Ca-containing salt were simultaneously added. The coating exhibits both excellent protectiveness and durable wet adhesive strength. This work offers a new perspective concerning the design of the conversion bath with optimal protectiveness.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"510 ","pages":"Article 132225"},"PeriodicalIF":5.3,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143921619","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":"Cold-sprayed Cu-WC/Cu/Cu-Ni@W multilayer deposits for high-quality repair of Cu alloy electromagnetic rails","authors":"JianYu Liu,&nbsp;Qiao Liu,&nbsp;XiaoTao Luo,&nbsp;ChangJiu Li","doi":"10.1016/j.surfcoat.2025.132233","DOIUrl":"10.1016/j.surfcoat.2025.132233","url":null,"abstract":"<div><div>In electromagnetic launch systems, the harsh service conditions coupling of electrical arc erosion, high temperature friction and high frequency of thermal shock make the surface of the high strength Cu alloy rail easily damaged. The conventional high-strength alloy repair layer faces challenges in balancing electrical conductivity with wear and arc erosion resistance. Addressing this challenge, in the present work, a novel multilayered repairing strategy is introduced by cold spraying pure Cu and Cu-based composite deposits for synergistically improving/balancing the adhesion, electrical conductivity and surface protection performance. The effects of the multilayered deposit structure design, strengthening particle surface modification, and heat treatment on adhesion, electrical conductivity, wear and arc erosion resistance of the deposits are investigated. An optimized multilayered structure composed of a Cu-WC bond coat, a pure Cu middle layer and a composite top layer deposited with Cu-Ni-clad W (Ni@W) powder is achieved. As compared with spraying pure Cu, an increase in adhesion from 14 MPa to 66 MPa is achieved via introducing Cu-WC composite bond coat on the CuCrZr substrate. For the top composite layer, as the Ni@W particles are used to strengthen pure Cu, the friction coefficient and wear rate decreases from 0.37 and 3.2 × 10⁻⁵ mm³·(N·m)⁻¹ to 0.14 and 2.3 × 10⁻⁵ mm³·(N·m)⁻¹, respectively, and the arc erosion depth and area decreased by 31.1 % and 81.0 % with the breakdown intensity improved by 50.6 % relative to the CuCrZr substrate. Meanwhile, a high electrical conductivity of 77.7 %IACS through the thickness direction is detected for the optimized multilayered deposit. Finally, a practical repair demonstration done on V-grooved CuCrZr substrates confirms the structural integrity and machinability of the cold sprayed multilayer composite deposit. The present work is attempted to offer a viable solution for improve the service performance and extending the service life of the metallic structures used in coupled harsh conditions.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"510 ","pages":"Article 132233"},"PeriodicalIF":5.3,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143907909","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}