Journal of Thermal Spray Technology最新文献

{"title":"Announcing the Journal of Thermal Spray Technology 2024 Editor’s Choice Selections","authors":"André McDonald","doi":"10.1007/s11666-025-01995-5","DOIUrl":"10.1007/s11666-025-01995-5","url":null,"abstract":"","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 4","pages":"1021 - 1022"},"PeriodicalIF":3.2,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the Sealing Treatment and Dielectric Properties of Al2O3 Insulating Coatings","authors":"Botao Han,&nbsp;Naeem ul Haq Tariq,&nbsp;Jiqiang Wang,&nbsp;Tianying Xiong,&nbsp;Ning Li,&nbsp;Xinyu Cui","doi":"10.1007/s11666-025-01948-y","DOIUrl":"10.1007/s11666-025-01948-y","url":null,"abstract":"<div><p>The sealing treatment of plasma-sprayed Al₂O₃ insulating coatings and its effect on the microstructure and dielectric properties were systematically investigated. To compare the penetration depth of sealants, various sealing processes were employed, utilizing two types of sealants and under two different ambient pressures. The microstructure of coatings was analyzed using scanning electron microscopy, energy dispersive spectrometer, and isothermal adsorption/desorption tests. Breakdown strength, resistivity, dielectric constant (<span>({varepsilon }_{r})</span>), loss tangent (<span>(text{tan}delta)</span>), and complex impedance were measured for both unsealed and sealed coatings. The results indicated that the maximum penetration depth percentage (50.8%) was achieved with the diluted sealant under low ambient pressure (20 Pa). A penetration model, that includes the ambient pressures, pore diameters, and physical properties of the sealant, was proposed and validated. The sealing treatment nearly doubled the breakdown strengths of coatings under DC, 50 Hz, and 500 Hz voltages and increased resistivity by nearly 100 times in environments with varying relative humidity (RH) levels. Additionally, the sealing treatment decreased the <span>({varepsilon }_{r})</span> and <span>(text{tan}delta)</span> of coatings in a 20% RH environment and increased their impedance in both 20% RH and 80% RH environments. This study provides a theoretical basis for the design and application of sealing treatments.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 4","pages":"1401 - 1417"},"PeriodicalIF":3.2,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microstructural, Mechanical, and Tribological Evaluation of HVAF-Sprayed Inconel 718 Coatings","authors":"N. Narendra Babu,&nbsp;Syam Kumar,&nbsp;Sumanth Govindarajan","doi":"10.1007/s11666-025-01974-w","DOIUrl":"10.1007/s11666-025-01974-w","url":null,"abstract":"<div><p>This study evaluates the mechanical and wear properties of IN718 coating on IN625 substrates deposited using the HVAF-spraying technique. The deposited coating was characterized by SEM, EDS, EBSD, Raman, nanoindentation, and microhardness. The integrity and adhesion of the coating were assessed using scratch tests aided by acoustic emission spectroscopy. The tribological evaluation was performed using a dry sliding wear test with a ball-on-coated disc configuration using alumina as the counterface. The coating microstructure comprises mostly unmelted particles with a small fraction of melted, with a porosity level &lt; 1.5% and about 8.4% oxidation. Both the microhardness and nanoindentation show the anisotropy in the coating. The elastic modulus is at the same level as bulk IN718 when measured perpendicularly to the thickness direction, but it is lower when measured along the thickness. The average compressive stress of 608 MPa and the Bauschinger effect influence the anisotropy observed in the coatings. ISO 27307 scratch tests reveal that coatings have good cohesion and adhesion strength. Wear tests were performed at room temperature, 400 °C and 600 °C. The room temperature wear is high and abrasive, while the high-temperature wear was lower and determined to be oxidative. Porosity is detrimental to the abrasive wear at room temperatures, which leads to localized chipping.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 4","pages":"1065 - 1081"},"PeriodicalIF":3.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Special Issue Featuring Papers from the International Thermal Spray Conference (ITSC) 2024","authors":"Giovanni Bolelli,&nbsp;Fardad Azarmi,&nbsp;Sara Bagherifard,&nbsp;Partha Pratim Bandyopadhyay,&nbsp;Šárka Houdková,&nbsp;Heli Koivuluoto,&nbsp;Yuk-Chiu Lau,&nbsp;Hua Li,&nbsp;Sinan Müftü,&nbsp;Filofteia-Laura Toma","doi":"10.1007/s11666-025-01971-z","DOIUrl":"10.1007/s11666-025-01971-z","url":null,"abstract":"","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 2-3","pages":"481 - 483"},"PeriodicalIF":3.2,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Oxidation and Hot Corrosion Behaviour of Dual Phase 8YSZ + La2Zr2O7 and 8YSZ + Gd2Zr2O7 TBC Systems","authors":"G. Moskal","doi":"10.1007/s11666-025-01978-6","DOIUrl":"10.1007/s11666-025-01978-6","url":null,"abstract":"<div><p>The article presents research results on thermal barrier coatings based on dual-phase systems of the type 8YSZ + Ln₂Zr₂O₇. Previous studies have shown that composite materials of this type are characterized by an increased tolerance to deformation and a significantly lower thermal conductivity coefficient value than single-phase coatings. Therefore, two-phase composite coatings are expected to demonstrate the ability to operate for a more extended time without compromising their integrity and without ceramic layer spallation. The scope of the presented analysis included assessing the phase constituent stability under oxidation conditions at 1100 °C for 2000 hours and hot corrosion in Na₂SO₄ at 950 °C for 300 hours. The XRD analyses showed that in the 8YSZ + La₂Zr₂O₇ system, there is no significant interaction between components of the TBC under analyzed conditions. In the case of the system containing Gd₂Zr₂O₇, an intensive tendency to mutual interactions was demonstrated, expressed by the formation of non-stoichiometric Gd_xZr_1−xO_2−x/2 with a fluorite-type lattice. The intensity of this process was much higher with the assistance of Na₂SO₄. The XRD test results were confirmed by SEM/EDS analyses, which showed the presence of areas significantly different in chemical composition and morphology in the case of the 8YSZ + Gd₂Zr₂O7 coatings and relatively small morphological changes in the case of the 8YSZ + La₂Zr₂O₇ system. These analyses were verified during tests on model powder mixtures. The model tests covered the temperature range from 800 to 1400 °C (24 h at each temperature). The research conducted confirmed the previously obtained results. The research suggests that two-phase coatings 8YSZ + Ln₂Zr₂O₇ may be a very effective solution for applications in gas turbines. Despite intense phase changes, they showed high durability (at least 2000 hours), practically without the effects of the ceramic layer’s disintegration. However, the desirable or undesirable nature of the observed phenomena (order-disorder transition, formation of chromites) requires further analysis.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 4","pages":"1082 - 1108"},"PeriodicalIF":3.2,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the Residual Stress in Film-Cooled Turbine Blade-Thermal Barrier Coating System with 3D Finite Element Model","authors":"Liming Yu,&nbsp;Yifei Zhang,&nbsp;Rujuan Zhao,&nbsp;Ziyi Cheng,&nbsp;Yi Wang,&nbsp;Qingmin Yu","doi":"10.1007/s11666-025-01977-7","DOIUrl":"10.1007/s11666-025-01977-7","url":null,"abstract":"<div><p>In this study, a three-dimensional finite element model was developed with an air-film cooled turbine blade as a substrate on which a thermal barrier coating (TBC) was sprayed, considering the interface morphology of the TBC system. By means of a simulation study method, the residual stresses at the interface of the TBC are calculated when the temperature of the TBC decreases linearly from 1000 to 25 °C, the influence of air-film cooling holes geometry parameters on residual stress in TBC system was studied. In the study, it was found that the shape and positional characteristics of the air-film cooling holes, such as the position of the cooling hole, radius, ratio between upper and lower radii of a cooling hole, and space angle, have certain effect on the residual stress. When the air-film cooling holes are located at the lowest part of the TBC interface, there is minimal residual stress, while at the junction of the bond coat and the thermally grown oxide, there is a more severe stress concentration, which should be paid special attention to. The radius of air-film cooling holes not only affects the value of the residual stress but also affects the range of its extreme value, and the small radius of cooling hole can reduce the residual stress to a large extent. The proper ratio between upper and lower radii and space angle can reduce the residual stress to a certain extent. This can provide a preliminary optimization design scheme for air-film cooling blade and hole drilling.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 4","pages":"1160 - 1176"},"PeriodicalIF":3.2,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Spray Additive Manufacturing: A Review of Shape Control Challenges and Solutions","authors":"Roberta Falco,&nbsp;Sara Bagherifard","doi":"10.1007/s11666-025-01970-0","DOIUrl":"10.1007/s11666-025-01970-0","url":null,"abstract":"<div><p>Cold spray (CS) is a promising solid-state deposition method that offers several advantages over traditional thermal spray techniques. With rapid deposition, minimal thermal degradation and distortion, and unique flexibility in material selection and part size, it is an attractive option for additive manufacturing. Despite the latest steep technological advancements, a significant hindrance to the wide application of CS in this field is shape accuracy. The Gaussian-like deposit profiles characteristic of CS limit its resolution, causing waviness along the deposit, tapering, and edge losses, making shape control a difficult task. Deposit shape modeling can play a major role in addressing this challenge and counterbalancing the restrictive resolution issues by predicting the deposit shape, as a function of kinetic process parameters. Macroscale deposition modeling can furthermore boost automated process planning for high geometrical control. This paper depicts the current scenario and ongoing attempts to characterize and predict CS deposit shape. It categorizes CS shape prediction models into Gaussian-fit, physics-based, and data-driven. Through the critical evaluation of such models, research gaps and potential areas of improvement are identified, particularly in simultaneously achieving high prediction accuracy and computational efficiency, rather than framing them as competing objectives. Alternative recently developed strategies for geometrical control are furthermore explored, including advanced trajectory planning techniques, tailored to CS.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 4","pages":"1023 - 1041"},"PeriodicalIF":3.2,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11666-025-01970-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Corrosion Behavior of Thermal Sprayed ZrO2·38Y2O3 and ZrO2·18TiO2·10Y2O3 Ceramic Coatings with Different Metallic Bonding Layers in Acid Solution","authors":"Tianze Xia,&nbsp;Yin Zhuang,&nbsp;Jing Sheng,&nbsp;Jinxing Ni,&nbsp;Jiasheng Yang,&nbsp;Shunyan Tao,&nbsp;Huayu Zhao,&nbsp;Fang Shao","doi":"10.1007/s11666-025-01972-y","DOIUrl":"10.1007/s11666-025-01972-y","url":null,"abstract":"<div><p>To protect 304L stainless steel from acid corrosion, ZrO₂·38Y₂O₃ and ZrO₂·18TiO₂·10Y₂O₃ ceramic coatings were prepared by atmospheric plasma spraying (APS). CoMoCrSi and CoNiCrAlY were applied as bonding layers between substrates and ceramic coatings using high-velocity oxy-fuel spraying and APS, respectively. By exploring the phase composition, microstructure, and element contents of coatings, combined with corrosion behavior and hardness, it was found that though CoMoCrSi coating had denser microstructure, CoNiCrAlY bonding layer exhibited higher corrosion resistance. Direct contact between the bonding layers and the corrosive medium should be avoided. Compared with HNO₃ solution, H₃PO₄ solution had a stronger influence on the microstructure and hardness. Low corrosion degree of the two ceramic coatings was observed in hydrothermal acid solution. From the perspective of preventing media penetration, ZrO₂·18TiO₂·10Y₂O₃ coating was superior due to the denser microstructure, whereas the own reactivity of ZrO₂·38Y₂O₃ was lower than that of ZrO₂·18TiO₂·10Y₂O₃ coatings in hydrothermal acid solution. After weighing advantages and disadvantages, plasma-sprayed coating with CoNiCrAlY bonding layer and ZrO₂·38Y₂O₃ ceramic coating was considered as a promising material for anti-corrosion applications. Spraying parameter optimization and sealant may further improve its performance. This work can provide insights for further protecting 304L components in acid environments.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 4","pages":"1353 - 1367"},"PeriodicalIF":3.2,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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, Mechanical, and Dry Sliding Wear Performance of Equimolar CoCrNiTiMo and CoCrNiTiW High-Entropy Alloy Coatings","authors":"Syam Narayana Addepalli,&nbsp;Sharnappa Joladarashi,&nbsp;M. R. Ramesh","doi":"10.1007/s11666-025-01975-9","DOIUrl":"10.1007/s11666-025-01975-9","url":null,"abstract":"<div><p>In the present investigation, mechanical alloyed CoCrNiTiMo and CoCrNiTiW equimolar HEA powders were employed as feedstock in the development of dense coatings using high-velocity oxy-fuel technique. The dry sliding wear behavior of uncoated substrate and high-entropy alloy (HEA) coatings were extensively investigated at different temperatures and loads using a pin-on-disk tribometer. The microstructures and phases of the mechanical alloyed powders, deposited coatings, and worn surfaces were thoroughly studied. The mechanical alloyed CoCrNiTiMo and CoCrNiTiW HEAs demonstrated the evolution of two BCC solid solutions. However, the deposited coatings reported the formation of additional phases, including Co₃Ti intermetallic and NiTiO₃ spinel. The microstructural analysis of CoCrNiTiMo and CoCrNiTiW coatings unveiled a compact lamellar structure characterized by robust mechanical interlocking to the substrate. The CoCrNiTiMo and CoCrNiTiW HEA coatings displayed porosities of 1.12 ± 0.05% and 1.39 ± 0.03%, respectively. Additionally, the microhardness assessments revealed superior values for CoCrNiTiMo and CoCrNiTiW HEA coatings, measuring at 927 ± 45 HV_0.3 and 951 ± 38 HV_0.3, correspondingly. The wear rate of CoCrNiTiMo HEA coating dropped by 70.5%, from 17.34 ± 2.8<b> × </b>10⁻⁶ mm³/N-m to 5.1 ± 1.6<b> × </b>10⁻⁶ mm³/N-m with an increment in the wear testing temperature from ambient to 600 °C. Concurrently, the CoCrNiTiW coating experienced a 76.3% drop in the wear rates from 15.8 ± 3.7<b> × </b>10⁻⁶ mm³/N-m to 3.73 ± 2.1<b> × </b>10⁻⁶ mm³/N-m. The significant fall in the wear rates at higher temperatures was accredited to the development of oxide tribofilms. CoCrNiTiMo exhibited discernible oxide phases, including CoMoO₄, TiO₂, and NiO. In contrast, its counterpart, CoCrNiTiW, generated WO₃, CoWO₄, and TiO₂ oxides at a temperature of 600 °C. The adhesive wear at RT transitioned to predominant oxidative wear with slight fatigue and abrasive wear at high temperatures.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 4","pages":"1329 - 1352"},"PeriodicalIF":3.2,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards Improved Plasticity in Cold-Sprayed Amorphous/Nanocrystalline Aluminum Alloy Deposits: The Role of Heat Treatment on the Microstructure and Mechanical Anisotropy","authors":"Denny John,&nbsp;Sohail M. A. K. Mohammed,&nbsp;YiFei Fu,&nbsp;Anil Lama,&nbsp;Tanaji Paul,&nbsp;Sudipta Seal,&nbsp;Arvind Agarwal","doi":"10.1007/s11666-025-01968-8","DOIUrl":"10.1007/s11666-025-01968-8","url":null,"abstract":"<div><p>Amorphous/nanocrystalline aluminum alloys (Al-Ni-Y-Co-Sc) have potential for high-strength cold spray deposits, but their limited plasticity restricts thick deposit formation. This study explores a composite deposit using a 1:1 weight ratio of Al-Ni-Y-Co-Sc and Al-6061, focusing on microstructural tailoring through heat treatment at 320 and 380 °C. Heat treatment induced crystallization in Al-Ni-Y-Co-Sc splats, forming Al₃Ni and Al₃Sc precipitates, while Al-6061 regions showed grain growth and dislocation recovery. This resulted in a bimodal elastic modulus distribution, with Al-Ni-Y-Co-Sc regions exhibiting higher stiffness (80–110 GPa) compared to Al-6061 (65–75 GPa), while fine grains and precipitates in the microstructure yielded a microhardness of 261 HV, which decreased by 33 and 40% at 320 and 380 °C, respectively. Anisotropy in mechanical behavior, assessed by indentation techniques, reduced with heat treatment due to stress relaxation and grain growth. The ultimate tensile strength decreased from 298 to 260 MPa, with ductility increasing slightly from 0.3 to 0.5%. Although failure occurred through crack propagation in brittle Al-Ni-Y-Co-Sc splats, the crack propagation rate decreased from 61 to 16 ms⁻¹ after heat treatment, indicating improved crack resistance. Further optimization of the Al-Ni-Y-Co-Sc/6061 ratio and heat treatment is recommended to mitigate brittle failure in these deposits.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 4","pages":"1418 - 1435"},"PeriodicalIF":3.2,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}