Dilkaram S. Ghuman, Marie-Laurence Cliche, Andre C. Liberati, Fadhel B. Ettouil, Christian Moreau, Chunzou Pan, Pantcho Stoyanov
{"title":"Metallization of Carbon Fiber-Reinforced Polymers (CFRPs) Via a Two-Step Process of Electroless Plating and Thermal Spraying","authors":"Dilkaram S. Ghuman, Marie-Laurence Cliche, Andre C. Liberati, Fadhel B. Ettouil, Christian Moreau, Chunzou Pan, Pantcho Stoyanov","doi":"10.1007/s11666-025-01993-7","DOIUrl":"10.1007/s11666-025-01993-7","url":null,"abstract":"<div><p>Carbon fiber-reinforced polymers (CFRPs) are commonly used materials within the aerospace industry due to their low density and favorable mechanical properties. Nevertheless, while CFRPs are optimal for applications requiring low weight and high strength, applying thermal spray coatings to these composites presents significant challenges, including distortion, oxidation, and poor coating adhesion. This study presents a new technique that combines electroless plating processes and thermal spray for depositing metals onto polymer-reinforced composites. The process addresses both the technical hurdles of bonding dissimilar materials and the need for lightweight, durable composites in aerospace manufacturing with low cost of production and high scalability factor. Samples of low-melt polyaryletherletone thermoplastic polymer reinforced with carbon fibers aligned in the normal direction (ZRT film) are plated with Ni, Cu, or Ag to provide an adhesion layer for the thermal spray processes. Subsequently, pure Sn and Ti-6Al-4V are deposited on the samples using high-velocity air fuel and atmospheric plasma spray (APS) processes. Characterization of the samples was conducted to demonstrate the cracking in the Ti-6Al-4V coating on the Ni plating, which was attributed to the interlayers’ thermal properties. Additionally, the variation in the coating thickness according to the interlayer, the thermal resistance of the resulting samples, and the splat morphology of the Sn and Ti-6Al-4V coatings were evaluated. Overall, the Sn coating applied via APS on the nickel plating exhibited the optimal performance in terms of the evaluated parameters in this study.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 5","pages":"1855 - 1872"},"PeriodicalIF":3.3,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145360","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":"Formation of In Situ Al/TiAl3 Coatings on Electron Beam Melted (EBM) Ti-6Al-4V Alloy by Cold Spray and Induction Heating","authors":"Erdem Balcı, Aptullah Karakaş, Burak Bayram, Mertcan Kaba, Faiz Muhaffel, Pınar Korkmaz Tilki, Evren Tan, Murat Baydoğan","doi":"10.1007/s11666-025-01994-6","DOIUrl":"10.1007/s11666-025-01994-6","url":null,"abstract":"<div><p>In this study, the formation of fast, hard, well-adhered and scratch-resistant in-situ composite coatings on electron beam melted (EBM) Ti-6Al-4V alloy were proposed by successive applications of cold spray (CS) and induction heat treatment techniques. The total treatment time to achieve such properties was around only 5 min. In this context, pure aluminum (Al) was first coated by CS technique on EBM Ti-6Al-4V alloy, and the coated samples were heat treated by induction heating method for different times (10 and 20 s). The coating layer that bonded well to the substrate material was obtained using the CS technique. After the induction heating, TiAl<sub>3</sub> intermetallics were formed in a sawtooth-like morphology as an interfacial layer at the substrate-coating interface. Similar to the interface, fiber and plate-like TiAl<sub>3</sub> compounds were found within the CS’ed coating layer. As the induction heating time increased to 20 s, the thickness of the interfacial layer and the fraction of intermetallics in the coating layer correspondingly increased. The highest hardness and scratch resistance were obtained in the 20 s induction-heated sample. Finally, this study demonstrates that the cold spray followed by induction heating is a rapid technique to obtain hard, well-adhered and scratch-resistant composite coatings in-situ on EBM Ti-6Al-4V alloy.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 5","pages":"1685 - 1699"},"PeriodicalIF":3.3,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11666-025-01994-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145364","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}
Yixin Li, Zihang Li, Jiayi Peng, Juncheng Wang, Zi Wang, Yan Wang, Liming Tan, Feng Liu
{"title":"Effect of Graphene on High-Temperature Oxidation Behavior and Mechanism of NiAl Bond Coat","authors":"Yixin Li, Zihang Li, Jiayi Peng, Juncheng Wang, Zi Wang, Yan Wang, Liming Tan, Feng Liu","doi":"10.1007/s11666-025-01997-3","DOIUrl":"10.1007/s11666-025-01997-3","url":null,"abstract":"<div><p>The existing metal bond coat is struggling with increasing demand for high thermal barrier coatings. To address this issue, multilayer graphene (Gr) was added as a reinforcement to NiAl bond coat. NiAl-based coatings with 0%, 0.6%, and 6% Gr were prepared via high-velocity oxygen fuel (HVOF), and their oxidation behaviors at 1050 °C were investigated. The results show that the addition of Gr apparently improves the high-temperature oxidation resistance of the NiAl coating. Mixed oxides of steady-state α-Al<sub>2</sub>O<sub>3</sub> and metastable θ-Al<sub>2</sub>O<sub>3</sub> form on the NiAl coating, while nearly pure α-Al<sub>2</sub>O<sub>3</sub> is exhibited on the NiAl-0.6Gr and NiAl-6Gr coatings. The excellent oxidation resistance of the NiAl-0.6Gr coating is attributed to the dense protective α-Al<sub>2</sub>O<sub>3</sub> layer formed by selective oxidation and the reduced agglomeration of Gr due to its appropriate content.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 5","pages":"1831 - 1842"},"PeriodicalIF":3.3,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145367","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}
Karem E. Tello, Ignacio González, Flavio De Barbieri, Claudio Aguilar
{"title":"Numerical Modeling of Gas and WC-Co-Cr Particles in the HVOF Process Using DJ2700 Gun and Hydrogen as a Fuel","authors":"Karem E. Tello, Ignacio González, Flavio De Barbieri, Claudio Aguilar","doi":"10.1007/s11666-025-01998-2","DOIUrl":"10.1007/s11666-025-01998-2","url":null,"abstract":"<div><p>This paper explores the potential of hydrogen as fuel through a detailed computational simulation of a DJ2700 gun. The simulation conditions, namely, boundary conditions, were established from experimental data collected from the literature. A one-step chemical reaction model and the eddy dissipation model were used to calculate the flame dynamics numerically. A decoupling method was used to calculate the dynamic behavior of the particle. The effects of the hydrogen, oxygen, and oxyfuel flow on the gas and WC-Co-Cr particles were evaluated. The results revealed that the hydrogen flow has a dominant impact on the temperature and velocity of the gases and, consequently, on the particle’s temperature and velocity. On the other hand, the oxygen flow has a dominant effect on the pressure achieved inside the combustion chamber. In addition, it was observed that the particle velocity is proportional to the pressure, while the particle temperature is affected by both fuel and oxygen flow.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 5","pages":"1622 - 1641"},"PeriodicalIF":3.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144724","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":"Flame-Sprayed Ceramic and Metallic Slippery Liquid-Infused Porous and Icephobic Surfaces","authors":"Betül Aktaş, Reza Jafari, Heli Koivuluoto","doi":"10.1007/s11666-025-01989-3","DOIUrl":"10.1007/s11666-025-01989-3","url":null,"abstract":"<div><p>This study explores the potential of flame-sprayed (FS) slippery liquid-infused porous surfaces (SLIPS) in addressing challenges associated with icing on structures in different industrial areas. Emphasizing the versatility of flame spraying, metallic (NiCr) and ceramic (Al<sub>2</sub>O<sub>3</sub>) coatings were investigated. FS coatings can exhibit high porosity, a crucial requirement for SLIPS. FS-Al<sub>2</sub>O<sub>3</sub> and FS-NiCr exhibited high porosity, 14.8% and 6.7% porosity, respectively. The introduction of lubricating agents, such as silicone oil and epoxy-based sealing agent, enhances coatings’ slipperiness, resulted in icephobic surfaces. These surfaces with reduced ice adhesion strengths were compared to their as-sprayed counterparts. As-sprayed surfaces had high ice adhesion strength (> 100 kPa). SLIPSs achieved lower ice adhesion strength around 63 kPa for the first icing-deicing cycle but could not retain the properties until the last cycle due to oil loss. Even though icephobicity was decreased, porous coating structures were protected by the remaining oil and survived icing-deicing cycles. Therefore, refilling of these structures is possible for long-term icephobicity. Sealed coatings showed stable low ice adhesion strengths around 60 kPa across four icing and deicing cycles, highlighting their potential for practical icephobic applications. Despite challenges in oil retention and durability for SLIPS under harsh icing conditions, flame spraying makes metallic and ceramic SLIPS possible for developing icephobic solutions.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 5","pages":"1843 - 1854"},"PeriodicalIF":3.3,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11666-025-01989-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145143383","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}
Mengting Zhang, Chen Song, Min Liu, Taikai Liu, Ke Du, Ziqian Deng, Kui Wen, Chunming Deng, Changguang Deng, Hanlin Liao, Kesong Zhou
{"title":"Preparation and Performance Degradation of Plasma-Sprayed Gadolinium-Doped Ceria Electrolyte for Metal-Supported SOFCs","authors":"Mengting Zhang, Chen Song, Min Liu, Taikai Liu, Ke Du, Ziqian Deng, Kui Wen, Chunming Deng, Changguang Deng, Hanlin Liao, Kesong Zhou","doi":"10.1007/s11666-025-01992-8","DOIUrl":"10.1007/s11666-025-01992-8","url":null,"abstract":"<div><p>Gadolinium-doped ceria (GDC) is a promising electrolyte for metal-supported solid oxide fuel cells (MS-SOFCs) due to its high ionic conductivity at intermediate temperatures (500-700 °C). However, the extremely high sintering and densification temperature required for GDC electrolytes limits their practical application. Low-pressure plasma spraying (LPPS) offers a potential solution by enabling the preparation of dense GDC coatings without the need for sintering. This study explores the relationship between spraying distance, coating microstructure, and cell performance and elucidates the deposition mechanism and performance degradation of GDC-based MS-SOFCs. Results show that spraying distance significantly affects coating microstructure and cell performance. At shorter distances, perpendicular cracks dominate, while parallel cracks increase with distance. Increasing the spraying distance from 250 to 300 mm reduces the cell open circuit voltage (OCV) from 0.896 to 0.876 V and the maximum power density (MPD) from 176 to 135 mW/cm<sup>2</sup> at 600 °C. After 100 h of degradation testing for 275 mm-cell, the OCV decreases from 0.885 to 0.86 V and MPD drops from 151 to 82 mW/cm<sup>2</sup>. However, impedance spectroscopy analysis reveals that only 5% of the reduction in power density is attributed to the GDC electrolyte. These findings highlight the potential of LPPS as a viable technique for preparing dense GDC electrolyte for MS-SOFC.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 5","pages":"1610 - 1621"},"PeriodicalIF":3.3,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145143662","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}
Stephen G. Bierschenk, Michael F. Becker, Desiderio Kovar
{"title":"Simulating the Effects of the Native Oxide Layer During Kinetic Spraying of Tantalum Particles Using a Deep Learning Interatomic Potential","authors":"Stephen G. Bierschenk, Michael F. Becker, Desiderio Kovar","doi":"10.1007/s11666-025-01991-9","DOIUrl":"10.1007/s11666-025-01991-9","url":null,"abstract":"<div><p>The role of the native oxide layer present on metallic powders on the deformation and film formation mechanisms is not fully understood for powders deposited via kinetic spray processes such as cold spray or micro-cold spray (also referred to as the aerosol deposition method or vacuum kinetic spray). This study compares the deformation behavior of tantalum particles with and without an oxide layer using single-particle impact simulations performed via molecular dynamics (MD) simulations performed with a deep learning interatomic potential representation of the Ta/Ta<sub>2</sub>O<sub>5</sub> system. The ability of the deep learning-based potential to accurately reproduce the impact behavior for this complex material system is verified and the computational costs are shown to be significantly lower than for ab initio molecular dynamics and complex reactive potentials previously used to simulate metal–oxide interfaces. The lower computational costs when using the deep learning approach allow for partially oxidized particles that are large enough to be comparable to what can be deposited experimentally (50 nm) to be studied using MD simulations across a wide range of impact velocities (250-750 m/s). These simulations reveal that the presence of the 3-nm-thick oxide layer reduces overall deformation by > 40% across all particle sizes and impact velocities. For 40 nm and 50 nm particles impacted at high velocity, however, the rupture of the native oxide layer allows comparable kinetic energy dissipation compared to particles without an oxide layer of equal diameter despite much more limited overall deformation.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 5","pages":"1666 - 1684"},"PeriodicalIF":3.3,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145143145","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}
Martin Eberle, Samuel Pinches, Hannah King, Pablo Guzman, Kai Qin, Andrew Ang
{"title":"Predicting Deposition Efficiency Across Diverse Cold Spray Process Parameters Using Machine Learning","authors":"Martin Eberle, Samuel Pinches, Hannah King, Pablo Guzman, Kai Qin, Andrew Ang","doi":"10.1007/s11666-025-01983-9","DOIUrl":"10.1007/s11666-025-01983-9","url":null,"abstract":"<div><p>Cold spray (CS) is an additive manufacturing process that is highly complex due to the many process parameters involved in the fabrication process. The efficiency of the process can be reasonably assessed and quantified through the metric of deposition efficiency (DE), denoting the ratio of the powder material successfully deposited to the total powder flowing through the nozzle. There is an industrial need to predict DE because it affects the powder usage and production cost. Machine learning (ML) has been proven to be a viable method to predict properties of additively manufactured parts as it can handle large datasets with numerous variables and is therefore well-suited to model the complex CS process. A large training dataset is needed to ensure that the ML model can be universally applied to the problem at hand. In this work, two datasets with different dimensionality and data quantities were developed, with data collected from experiments reported in the literature, and from newly obtained experimental data. These datasets were then used to train and develop ML models that can be applied to a wide range of CS spray scenarios, including a high number of variable spray parameters and large parameter ranges and high powder and substrate material flexibility. Four ML algorithms were selected for training, including K-nearest neighbors, random forest, gradient boosting, and neural network. The most accurate predictions of the DE were achieved with neural network and gradient boosting algorithms, with a root-mean-squared error under 6% DE on unseen data. An analysis of the performance using the learning curve concept revealed that the performance of most models could be further improved by collecting more training data. Shapley values and prediction maps emphasize the significant impact of gas temperature on DE, showcasing nonmonotonic changes with other CS process parameters.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 5","pages":"1642 - 1665"},"PeriodicalIF":3.3,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11666-025-01983-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142807","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":"Microstructural Evolution and Tribological Performance of Functionally Graded Al-µB4C/BNNP Coatings Produced via Cold Spray","authors":"Achyuth Kulkarni, Michael Krenn, Troy Y. Ansell","doi":"10.1007/s11666-025-01985-7","DOIUrl":"10.1007/s11666-025-01985-7","url":null,"abstract":"<div><p>This study investigates the microstructural and mechanical properties of cold-sprayed AA7075 coatings reinforced with varying compositions of micro-boron carbide (µB<sub>4</sub>C) and boron nitride nanoplatelets (BNNPs). Functionally graded coatings (FGCs) with different ceramic content (10-30 vol.% µB<sub>4</sub>C) were produced and analyzed for surface roughness, microstructure, hardness, and wear resistance. The inclusion of BNNPs improved particle distribution and reduced clustering in dual-reinforced compositions. Nanoindentation and wear tests show that coatings with higher µB<sub>4</sub>C content exhibited increased hardness and reduced wear rates, with a maximum hardness of 7.2 GPa for Al-30%µB<sub>4</sub>C. The wear resistance improved up to 46.5% compared to unreinforced AA7075, with µB<sub>4</sub>C particles enhancing load transfer and minimizing frictional forces.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"34 5","pages":"1736 - 1746"},"PeriodicalIF":3.3,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142482","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}