{"title":"Journal of Thermal Spray Technology Editor-in-Chief, André McDonald, to Start New Position at Memorial University of Newfoundland","authors":"","doi":"10.1007/s11666-026-02339-7","DOIUrl":"10.1007/s11666-026-02339-7","url":null,"abstract":"","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"35 7","pages":"2771 - 2771"},"PeriodicalIF":3.4,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149310250","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}
Benedikt Biller, Alexander Bußmann, Olivier Messe, Marcus Giglmaier, Nikolaus A. Adams
{"title":"Correction to: Numerical Model of a Hydrogen-Fueled HVOF Thermal Spray Process","authors":"Benedikt Biller, Alexander Bußmann, Olivier Messe, Marcus Giglmaier, Nikolaus A. Adams","doi":"10.1007/s11666-026-02317-z","DOIUrl":"10.1007/s11666-026-02317-z","url":null,"abstract":"","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"35 7","pages":"3330 - 3330"},"PeriodicalIF":3.4,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11666-026-02317-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149310073","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}
Micheal J. Carter, Venkata S. Bhattiprolu, Leila Sorkhi, Nathan O. Staley, Nathan J. Madden, Wade A. Lein, Grant A. Crawford
{"title":"Heat Treatment of 4140 Steel Alloy Powder for High-Pressure Cold Spray Applications","authors":"Micheal J. Carter, Venkata S. Bhattiprolu, Leila Sorkhi, Nathan O. Staley, Nathan J. Madden, Wade A. Lein, Grant A. Crawford","doi":"10.1007/s11666-026-02313-3","DOIUrl":"10.1007/s11666-026-02313-3","url":null,"abstract":"<div><p>AISI 4140 steel, known for its strength, toughness, and fatigue resistance, is ideal for various applications. Considering the widespread use of this material, there is a continual need to develop cost-effective and rapid repair methods. This study examined the effect of powder heat treatment and in situ peening (using Praxair 410CrC powders) on the cold spray characteristics of 4140 powder and also evaluated the resulting microstructure and mechanical properties. 4140 powders were annealed at 650 °C for 1 and 3 h, which resulted in 35 and 50% reduction in powder hardness, respectively. Moreover, the as-quenched martensite structure present in the as-received powder was transformed to a more ductile, tempered martensite structure comprising a fine distribution of ferrite and cementite. Deposition efficiencies of 75% with helium and heat-treated powder and 58% for heat-treated powder reinforced with 410CrC using nitrogen were achieved. All coatings exhibited microhardness comparable to the quenched and tempered substrate. The higher hardness of the powder tempered for 1 h facilitated better peening of the particles and the substrate during deposition, resulting in higher adhesion strength of the coatings. However, 3 hour tempered powder resulted in coatings with greater tensile (cohesive) strength for both carrier gases.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"35 7","pages":"2925 - 2939"},"PeriodicalIF":3.4,"publicationDate":"2026-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149309695","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":"Effect of an HVOF-Sprayed WC-10Co4Cr Interlayer on the Adhesion and Tribological Performance of a PVD ta-C Coating on 316 Stainless Steel","authors":"Huan Zhang, Huan Zhen, Peilei Jing, Wei Peng","doi":"10.1007/s11666-026-02321-3","DOIUrl":"10.1007/s11666-026-02321-3","url":null,"abstract":"<div><p>Tetrahedral amorphous carbon (ta-C) coatings are attractive for improving the tribological performance of austenitic stainless steels because of their high hardness, low friction coefficient, and chemical inertness. A duplex coating system consisting of an HVOF-sprayed WC-10Co4Cr interlayer and a PVD-deposited ta-C coating was used to improve the load-bearing capacity and wear resistance of ta-C-coated 316 stainless steel. Scratch responses and dry reciprocating sliding wear behavior of the duplex coating were compared with those of a single PVD ta-C coating deposited directly on 316 stainless steel. The ta-C coatings in both systems had similar thicknesses and comparable hardness values. The HVOF-sprayed WC-10Co4Cr interlayer, with a thickness of 0.27 mm, hardness of 1315 HV0.3, porosity of 0.55%, and tensile adhesion strength of 76.77 MPa, provided an effective load-bearing foundation for the ta-C top layer. Scratch testing showed that the cohesive failure load increased from 34.1 to 78.2 N, while interfacial failure was suppressed up to the maximum applied load of 100 N. Under dry sliding conditions, the wear volume decreased from 183.04 × 10<sup>−3</sup> mm<sup>3</sup> for the single ta-C coating to 10.96 × 10<sup>−3</sup> mm<sup>3</sup> for the duplex coating, despite a slight increase in friction coefficient from 0.096 to 0.117. The results demonstrate that the HVOF-sprayed WC-10Co4Cr interlayer provides effective mechanical support for the ta-C top layer, suppresses premature coating failure, and markedly enhances the wear resistance of ta-C-coated 316 stainless steel. The HVOF-sprayed WC-10Co4Cr interlayer provides a contact-stress-shielding strategy for improving the tribological reliability of hard ta-C coatings on soft stainless steel substrates.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"35 7","pages":"2956 - 2967"},"PeriodicalIF":3.4,"publicationDate":"2026-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149309696","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":"Influence of TGO Structural Characteristics on the Thermomechanical Behavior of APS TBCs under Thermal Shock","authors":"Zhimin Yao, Yining Li, Wangzhuo Hu, Ranxing Leng","doi":"10.1007/s11666-026-02323-1","DOIUrl":"10.1007/s11666-026-02323-1","url":null,"abstract":"<div><p>Thermal barrier coatings (TBCs) are used in internal combustion engines to protect metallic components from high temperature. However, the thermally grown oxide (TGO) layer affects the service life of TBCs. In this study, finite element models incorporating non-uniform TGO layers with different thicknesses are developed to investigate the effects of TGO presence and thickness on the thermomechanical behavior of atmospheric plasma-sprayed (APS) TBCs under thermal shock. The results show that the presence of a thin TGO layer has a negligible influence on the overall thermal insulation performance under the investigated conditions, while it significantly affects the stress distribution within the ceramic top coat (TC). Compared with the TBC without TGO, the 5-μm-thick TGO reduces the maximum Y-direction tensile stress in the TC layer from 466.57 to 348.6 MPa and the maximum positive shear stress from 282.47 to 168.65 MPa. Within the investigated TGO thickness range of 2-6 μm, increasing TGO thickness further reduces the peak thermal mismatch stresses, with the maximum tensile stress and positive shear stress decreasing by approximately 25 and 26%, respectively. However, the average stresses in the ceramic layer do not exhibit a clear monotonic trend with increasing TGO thickness. These results provide insight into the role of non-uniform TGO morphology and thickness in regulating the thermomechanical response of APS TBCs under thermal shock.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"35 7","pages":"3232 - 3247"},"PeriodicalIF":3.4,"publicationDate":"2026-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149309697","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":"Tribo-Corrosion Mechanism of Ni625-WC Laser-Clad Coating: Effect of Microstructure and Sliding Frequency","authors":"Yuchen Xi, Qilin Chen, Liyang Liu, Xingshou Zhang, Lijin Dong, Yangfei Zhang, Qinying Wang","doi":"10.1007/s11666-026-02319-x","DOIUrl":"10.1007/s11666-026-02319-x","url":null,"abstract":"<div><p>Laser cladding technology plays an important role in improving the wear resistance and corrosion resistance of drilling equipment. This paper investigates the effects of different sliding frequencies on the tribocorrosion and electrochemical properties of Ni625-WC laser-clad coatings. The results indicate that as the sliding frequency increases, the open circuit potential of the coating shifts negatively, the impedance decreases, and the corrosion resistance declines. Meanwhile, the coefficient of friction decreases, whereas the wear volume loss increases. The dominant wear mechanisms transition from abrasive wear and adhesive wear at lower sliding frequencies to intensified oxidative wear and microcrack formation at higher sliding frequencies. Quantitative analysis reveals that the total volume loss is primarily contributed by mechanical wear, and the corrosion-accelerated wear shows an increasing trend with increasing sliding frequency. Microcracks induced by high sliding frequency provide channels for the ingress of corrosive Cl<sup>−</sup>, further aggravating coating damage.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"35 7","pages":"3073 - 3089"},"PeriodicalIF":3.4,"publicationDate":"2026-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149309694","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}
Shuai Li, Peifeng Zhang, Xiaobo Xue, Yi Sun, Zhongying Liu, Sanming Du, Peng He, Qi Sun, Fuheng Nie, Hao Liu
{"title":"Reaction-Induced Microstructure Evolution and Properties of Plasma-Cladded CoCrFeNiMnTix(B4C)y High-Entropy Alloy Composite Coatings with In-Situ Carbide-Boride Networks","authors":"Shuai Li, Peifeng Zhang, Xiaobo Xue, Yi Sun, Zhongying Liu, Sanming Du, Peng He, Qi Sun, Fuheng Nie, Hao Liu","doi":"10.1007/s11666-026-02314-2","DOIUrl":"10.1007/s11666-026-02314-2","url":null,"abstract":"<div><p>CoCrFeNiMn high-entropy alloys generally suffer from limited hardness and tribological performance due to the dominance of a ductile FCC solid solution structure. To tailor the solidification microstructure and surface properties of FCC-dominated CoCrFeNiMn high-entropy alloy coatings, Ti and B<sub>4</sub>C were introduced as reactive elements during plasma cladding. The effects of Ti content on phase composition, microstructure evolution, mechanical properties, wear resistance, and corrosion behavior were systematically investigated using SEM, EDS, EPMA, EBSD, AFM, KPFM, and electrochemical tests. During plasma cladding, Ti/B<sub>4</sub>C reactions coupled with rapid solidification promoted the formation of TiC, TiB<sub>2</sub>, and Cr-rich borides, which evolved from isolated particles into a semi-continuous intergranular network. With increasing Ti content, the microstructure evolved from columnar grains to refined equiaxed grains, and the reinforcing phases transformed from isolated particles into a semi-continuous network. The CoCrFeNiMnTi<sub>0.5</sub>(B<sub>4</sub>C)<sub>0.19</sub> coating exhibited the optimal comprehensive performance, achieving a hardness of 470 HV<sub>0.2</sub>, a friction coefficient of 0.47, and a wear rate of 1.25 × 10<sup>-6</sup> mm<sup>3</sup>·N<sup>-1</sup>·m<sup>-1</sup>. Corrosion tests indicated that the semi-continuous network promoted the formation of a stable passive film and inhibited corrosive medium penetration. AFM and KPFM analyses further revealed a relatively uniform surface potential distribution and reduced electrochemical heterogeneity, contributing to enhance corrosion resistance.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"35 7","pages":"3153 - 3172"},"PeriodicalIF":3.4,"publicationDate":"2026-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149310783","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":"Effect of Laser Remelting on the Microstructure and Properties of HVOF-Sprayed WC-10Ni-0.5CeO2 Coating","authors":"Bei Jiang, Junsheng Meng, Yuzhen Cong","doi":"10.1007/s11666-026-02312-4","DOIUrl":"10.1007/s11666-026-02312-4","url":null,"abstract":"<div><p>As a critical runner component of a hydro turbine, the blade significantly influences its efficiency and economic returns. To extend its service life, a WC-10Ni-0.5CeO<sub>2</sub> coating was deposited onto a 0Cr13Ni5Mo steel substrate via high-velocity oxygen fuel (HVOF) spraying, followed by laser remelting as a post-treatment. The effect of laser remelting on the microstructure and properties of the sprayed coating was systematically evaluated. The phase composition, microstructure, elemental distribution, and mechanical properties of the coatings before and after remelting were compared. The results showed that the remelted coating consisted of WC, W<sub>2</sub>C, and <i>γ</i>-Ni (W, C) solid solution. Its internal cracks were eliminated, and porosity decreased from 1.80 ± 0.43 to 0.41 ± 0.19%. The coating exhibited good adhesion to the substrate, with oriented grains and a more uniform grain size distribution. The microhardness distribution became more consistent, and both fracture toughness and erosion–wear resistance were significantly improved.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"35 7","pages":"3396 - 3415"},"PeriodicalIF":3.4,"publicationDate":"2026-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149310362","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}
Michael Boschen, Ashok Meghwal, Ameey Anupam, Stefan Bjorklund, Shrikant Joshi, Paul Munroe, Christopher C. Berndt, Andrew S. M. Ang
{"title":"Oxidation Behaviour of HVAF Sprayed Al0.3CrFeNiTi0.3 High Entropy Alloy Coating","authors":"Michael Boschen, Ashok Meghwal, Ameey Anupam, Stefan Bjorklund, Shrikant Joshi, Paul Munroe, Christopher C. Berndt, Andrew S. M. Ang","doi":"10.1007/s11666-026-02306-2","DOIUrl":"10.1007/s11666-026-02306-2","url":null,"abstract":"<div><p>This study investigates, for the first time, the oxidation resistance of a novel Al<sub>0.3</sub>CrFeNiTi<sub>0.3</sub> high-entropy alloy (HEA) coating produced via high velocity air fuel (HVAF) spray, examined by isothermal oxidation at 500, 700 and 900 °C for up to 200 h. The oxidation rate coefficient (<i>k</i><sub><i>h</i></sub>) was determined by measuring the change in thermally grown oxide (TGO) layer thickness and converted to an approximate mass-based coefficient (<i>k</i><sub><i>p</i></sub>) for easier comparison to oxidation resistant materials. XRD and SEM/EDS analysis determined the phase and microstructural characteristics of the coating. The oxidation testing at 500 °C indicated negligible surface oxidation, however, at 700 and 900 °C, the coating formed a complex, multilayered, TGO layer, comprised of Al<sub>2</sub>O<sub>3</sub>, Cr<sub>2</sub>O<sub>3</sub> and a mix of TiFe<sub>2</sub>O<sub>4</sub> and NiFe<sub>2</sub>O<sub>4</sub> spinel oxides. The calculated oxidation rate coefficients (<i>k</i><sub><i>p</i></sub>) of 9.6x10<sup>−14</sup> and 1.1x10<sup>−12</sup> g<sup>2</sup>/cm<sup>−4</sup> s<sup>−1</sup> at 700 and 900 °C, respectively.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"35 7","pages":"3126 - 3152"},"PeriodicalIF":3.4,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11666-026-02306-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149310125","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}
Peyman Saffarzade, Amit Roy, Fadhel Ben Ettouil, Martin Pugh, Rogerio S. Lima, Christian Moreau
{"title":"Microstructural Evaluation of Laser Re-melted Columnar Thermal Barrier Coatings Produced by Suspension Plasma Spray","authors":"Peyman Saffarzade, Amit Roy, Fadhel Ben Ettouil, Martin Pugh, Rogerio S. Lima, Christian Moreau","doi":"10.1007/s11666-026-02308-0","DOIUrl":"10.1007/s11666-026-02308-0","url":null,"abstract":"<div><p>Thermal barrier coatings (TBCs) protect turbine engine components allowing them to operate at high temperatures, significantly improving turbine power and fuel efficiency. Suspension plasma spraying (SPS), allows the creation of columnar microstructures with controlled porosity, thermal stresses, and lower thermal conductivity. However, the major challenge for the columnar structure is that it facilitates the penetration of calcium–magnesium–alumino-silicates (CMAS), which leads to TBC deterioration. To mitigate this, a laser post-treatment process has been proposed to re-melt the top layer of TBCs. In this study, columnar yttria-stabilized zirconia (8YSZ) topcoats were deposited by axial SPS. A CO<sub>2</sub> laser treatment was used to create a re-melted layer at the surface of the SPS coatings. The influence of key laser parameters, such as scanning speed and laser power, on the microstructure of the re-melted top layer of the columns in the SPS coatings was investigated. Also, the micro-hardness, crack network and phase analysis of the laser re-melted layer were studied. The study showed that increasing the scanning speed increased the width of cracks of re-melted zone of TBC. Additionally, the laser glazing decreased surface roughness, sealed open porosity, produced a dense microstructure, and increased micro-hardness. The phase composition remained stable (metastable tetragonal (t′) phase) for both as-sprayed and laser-glazed samples.</p></div>","PeriodicalId":679,"journal":{"name":"Journal of Thermal Spray Technology","volume":"35 7","pages":"3217 - 3231"},"PeriodicalIF":3.4,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149310545","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}