International Thermal Spray Conference最新文献_第6页

The Potential of High Velocity Air Fuel Spraying (HVAF) to Manufacture Bond Coats in Thermal Barrier Coating Systems 高速空气燃料喷涂(HVAF)在热障涂层系统中制造粘结层的潜力

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0625

G. Mauer, Karl-Heinz Rauwald, R. Vaßen

{"title":"The Potential of High Velocity Air Fuel Spraying (HVAF) to Manufacture Bond Coats in Thermal Barrier Coating Systems","authors":"G. Mauer, Karl-Heinz Rauwald, R. Vaßen","doi":"10.31399/asm.cp.itsc2023p0625","DOIUrl":"https://doi.org/10.31399/asm.cp.itsc2023p0625","url":null,"abstract":"\u0000 Driven by the search for an optimum combination of particle velocity and process temperature to achieve dense hard metal coatings at high deposition efficiencies and powder feed rates, the high velocity air-fuel spraying process (HVAF) was developed. In terms of achievable particle velocities and temperatures, this process can be classified between high velocity oxy-fuel spraying (HVOF) and cold gas spraying (CGS). The particular advantages of HVAF regarding moderate process temperatures, high particle velocities as well as high productivity and efficiency suggest that the application of HVAF should be also investigated for the manufacture of MCrAlY (M = Co and/or Ni) bond coats (BCs) in thermal barrier coating (TBC) systems. In this work, corresponding HVAF spray parameters were developed based on detailed process analyses. Different diagnostics were carried out to characterize the working gas jet and the particles in flight. The coatings were investigated with respect to their microstructure, surface roughness and oxygen content. The spray process was assessed for its effectiveness. Process diagnostics as well as calculations of the gas flow in the jet and the particle acceleration and heating were applied to explain the governing mechanisms on the coating characteristics. The results show that HVAF is a promising alternative manufacturing process.","PeriodicalId":114755,"journal":{"name":"International Thermal Spray Conference","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126382780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Zr and Si Addition on Mechanical Properties of Al0.5CoCrFeNi High-Entropy Alloys Zr和Si添加对Al0.5CoCrFeNi高熵合金力学性能的影响

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0553

K. Bobzin, H. Heinemann, Marvin Erck, A. Schacht, Benedikt Korte, P. König

{"title":"Effects of Zr and Si Addition on Mechanical Properties of Al0.5CoCrFeNi High-Entropy Alloys","authors":"K. Bobzin, H. Heinemann, Marvin Erck, A. Schacht, Benedikt Korte, P. König","doi":"10.31399/asm.cp.itsc2023p0553","DOIUrl":"https://doi.org/10.31399/asm.cp.itsc2023p0553","url":null,"abstract":"\u0000 Thermally sprayed heating coatings are a recent approach for temperature control in moulding tools. While there are material options in the lower temperature range up to T = 300 °C, new alloys have to be developed to improve the range of application. The Al0.5CoCrFeNi high-entropy alloy (HEA) with further addition of Zr and Si shows favourable electrical properties due to severe lattice distortion. The alloy development was carried out with Al0.5CoCrFeNiZrxSiy by arc melting. Thereby, the molar Zr content x was varied from 0 to 0.5 and the Si content y from 0 to 0.2. In order to evaluate the alloy’s prospective performance, the phase composition was studied by SEM with EDX and the fracture toughness was determined to estimate fracture properties, which are found to be a typical failure mechanism of heating coatings. The different HEA exhibit a typical dendritic microstructure with fcc dendrites and a bcc interdentritic phase. The hardness of the alloys increases with increasing bcc content, while the ductility decreases. With knowledge about the effects of Zr and Si on the electrical and mechanical properties, which are justified by the microstructure, Al0.5CoCrFeNiZrxSiy HEA can be tailored specifically towards the needs of individual heating applications.","PeriodicalId":114755,"journal":{"name":"International Thermal Spray Conference","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114929023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Formation of AlSiCCr Columnar Medium-Entropy Coating via Aluminizing of Cr3C2 25NiCr HVOF Coating cr3c225nicr HVOF涂层渗铝制备AlSiCCr柱状中熵涂层

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0386

A. R. Mayer, Willian Rafael de Oliveira, L. Lourençato, A. Pukasiewicz

引用次数: 0

Influence of Nozzle Diameter on Electric Arc Dynamics in a Cascaded-Anode Plasma Torch 喷嘴直径对级联阳极等离子炬电弧动力学的影响

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0127

C. Ruelle, S. Goutier, V. Rat, A. Kéromnès, Geoffroy Rivaud, C. Chazelas, E. Meillot

{"title":"Influence of Nozzle Diameter on Electric Arc Dynamics in a Cascaded-Anode Plasma Torch","authors":"C. Ruelle, S. Goutier, V. Rat, A. Kéromnès, Geoffroy Rivaud, C. Chazelas, E. Meillot","doi":"10.31399/asm.cp.itsc2023p0127","DOIUrl":"https://doi.org/10.31399/asm.cp.itsc2023p0127","url":null,"abstract":"\u0000 Electric arc dynamics in plasma torch affects plasma jet stability and consequently, coating properties. Depending on plasma torch design, voltage fluctuations can vary from 100 % to only a few percent of the mean voltage. Particularly, cascaded-anode plasma torch leads to very low voltage fluctuation owing to the presence of neutrodes that limit the amplitude of arc fluctuations. However, electric arc dynamics and electrode erosion process in this type of plasma torch are still poorly understood. The aim of this work is to deepen the knowledge on the influence of nozzle diameter on electric arc dynamics for two plasma forming gas compositions by means of several diagnostics devices (end-on imaging, current and voltage time monitoring, plasma jet brightness fluctuations and thermal balance determination). Reducing nozzle diameter from 9 mm to 6.5 mm results in higher voltage fluctuations, lower mean voltage and lower plasma torch thermal efficiency, probably due to a more evenly distributed warm plasma gas in the anode nozzle volume, as suggested by the higher plasma brightness. Nozzle observations after testing show significant wear in a 6.5 mm diameter nozzle, which may be evidence of a longitudinal movement of the electric arc on the anode surface, leading to high voltage fluctuations.","PeriodicalId":114755,"journal":{"name":"International Thermal Spray Conference","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115065209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Plume Quenching on Controlled Atmosphere Plasma Sprayed Metals 烟羽淬火对可控气氛等离子喷涂金属的影响

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0458

E. Peleg, A. Vackel

{"title":"Effects of Plume Quenching on Controlled Atmosphere Plasma Sprayed Metals","authors":"E. Peleg, A. Vackel","doi":"10.31399/asm.cp.itsc2023p0458","DOIUrl":"https://doi.org/10.31399/asm.cp.itsc2023p0458","url":null,"abstract":"\u0000 Thermal spray processes benefit from workpiece cooling to prevent overheating of the substrate and to retain metallurgical properties (e.g., temper). Cold-gas “plume quenching” is a plume-targeting cooling technique, where an argon curtain is directed laterally above the substrate surface to re-direct high temperature gases without impacting particle motion. However, there has been little investigation of its effect on the molten particles and the resulting coating properties. This study examined high- and medium- density tantalum and nickel coatings, fabricated by Controlled Atmosphere Plasma Spray with and without plume quenching on aluminum and titanium substrates. To compare the effect of plume quenching, the deposition efficiency was calculated through coating mass gain, and the coating density, stiffness, and adhesion were measured. The tantalum and nickel coatings were largely unaffected by plume quenching with respect to deposition efficiencies, coating density, adhesion, and stiffness. These results indicate that a plume quench could be used without affecting the coating properties for high- and medium-density metals while providing the benefit of substrate cooling that increases with higher plume quench gas flow rates.","PeriodicalId":114755,"journal":{"name":"International Thermal Spray Conference","volume":"314 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123019917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microstructure and Properties of Fe-Based Amorphous Coating by HVOF HVOF制备铁基非晶涂层的组织与性能

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0503

Z. Pi, K. Du, Xing-fu Chen, Z. Zheng

引用次数: 0

Repair of Damaged Fiber Reinforced Polymer Composites with Cold Spray 损伤纤维增强聚合物复合材料的冷喷涂修复

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0742

I. A. Anni, M. Kaminskyj, K. Uddin, F. Haas, B. Koohbor, Joseph F. Stanzione III

{"title":"Repair of Damaged Fiber Reinforced Polymer Composites with Cold Spray","authors":"I. A. Anni, M. Kaminskyj, K. Uddin, F. Haas, B. Koohbor, Joseph F. Stanzione III","doi":"10.31399/asm.cp.itsc2023p0742","DOIUrl":"https://doi.org/10.31399/asm.cp.itsc2023p0742","url":null,"abstract":"\u0000 The promising structural properties of fiber-reinforced polymer composites make them widely popular in the energy, automotive, defense, and aerospace industries. One of the most challenging limitations associated with the use of composites in the above applications is the maintenance and repair protocols. In this study, a novel cold spray approach is introduced as an efficient alternative for the structural repair of fiber composites. Damages in the form of circular tapered holes are created in glass fiber-reinforced polymer (GFRP) composite substrates using a conventional drilling process. The in-lab created damages are repaired by cold spray with thermoplastic (nylon 6) and thermoset (polyester epoxy resin, PER) materials. The fundamental adhesion mechanisms are investigated through microstructural observations, which point to adiabatic shear instability due to the occurrence of severe plastic deformation as a governing factor. Microstructural examinations also suggest that no significant fiber damage or surface degradation occurs after the repair by cold spray. Mechanical tests performed on neat, damaged, and repaired composites reveal the partial recovery of structural performance and load-bearing capacity after cold spray repair. Results obtained in this work highlight cold spray as a promising alternative technique for onsite structural repair of composite structures with minimal pre/post-processing requirements.","PeriodicalId":114755,"journal":{"name":"International Thermal Spray Conference","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123550843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative Study of Mo and W Bonding Layers on Graphite during Plasma Spraying 等离子喷涂过程中石墨表面Mo和W键合层的对比研究

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0689

S. Kwon, Neo Kang, S. Hyun, J.-K. Kim, I. Kim, Tae-Ho Park, H-M Bong

引用次数: 0

Mixed-Material Feedstocks for Cold Spray Additive Manufacturing of Metal-Polymer Composites 金属-聚合物复合材料冷喷涂增材制造的混合原料

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0186

J. Palumbo, R. Ramaraju, Sanjeev Chandra Matthew S. Schwenger, M. Kaminskyj, F. Haas, Joseph F. Stanzione III

{"title":"Mixed-Material Feedstocks for Cold Spray Additive Manufacturing of Metal-Polymer Composites","authors":"J. Palumbo, R. Ramaraju, Sanjeev Chandra Matthew S. Schwenger, M. Kaminskyj, F. Haas, Joseph F. Stanzione III","doi":"10.31399/asm.cp.itsc2023p0186","DOIUrl":"https://doi.org/10.31399/asm.cp.itsc2023p0186","url":null,"abstract":"\u0000 High-performance polymers such as poly(ether ether ketone) (PEEK) are appealing for a wide variety of industrial and medical applications due to their excellent mechanical properties. However, these applications are often limited by relatively low thermal stability and conductivity compared to metals. Many methods developed to metallize polymers, including vapor deposition and thermal spray processes, can lead to poor quality control, low deposition rate, and high cost. Thus, cold spray is a promising potential alternative to rapidly and inexpensively produce polymer-metal composites. In this study, we investigated the deposition characteristics of metalpolymer composite feedstock, composed of PEEK powder with varying volume fractions of copper (Cu) flake added, onto a PEEK substrate. We prepared the Cu-PEEK composite powder in varying compositions by two methods: hand-mixing the powders and cryogenically milling the powders. Scanning electron microscopy (SEM) of the feed mixtures shows that cryogenically milling the polymer and metal powders together created uniformly distributed micron-scale domains of Cu on PEEK particle surfaces, and vice versa, as well as consolidating much of the porous Cu flake. In lowpressure cold spray, the relatively large volume fractions of PEEK in the composite mixtures allowed for lower operating temperatures than those commonly used in PEEK metallization (300-500 °C). While the deposition efficiencies of each mixture were relatively similar in single-layer experiments, deposits formed after multiple passes showed significant changes in deposition efficiency and composition in PEEK-rich feedstock mixtures. SEM of deposit surfaces and cross-sections revealed multiple co-dominant mechanisms of deposition, which affect both the porosity and final composition of the deposit. Though present in all samples analyzed, the effects of cryogenic milling were more prevalent at lower Cu concentrations.","PeriodicalId":114755,"journal":{"name":"International Thermal Spray Conference","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126609137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of Powder Feedstocks for Net Shape Coatings 净形涂料粉末原料的设计

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0303

O. Lanz, Manuel Schubert, W. Goes, Giuseppe Ruggiero, S. Björklund, S. Joshi

{"title":"Design of Powder Feedstocks for Net Shape Coatings","authors":"O. Lanz, Manuel Schubert, W. Goes, Giuseppe Ruggiero, S. Björklund, S. Joshi","doi":"10.31399/asm.cp.itsc2023p0303","DOIUrl":"https://doi.org/10.31399/asm.cp.itsc2023p0303","url":null,"abstract":"\u0000 For the last few years, the HVAF process has been established as a commercially used process and has gained an increasing share in the market of thermal spraying. The main thermal spray materials being used for HVAF spraying have been those based on the tungsten carbide family. Economical aspects and European regulations on chemicals management REACH (Registration, Evaluation and Authorisation of Chemicals) have motivated the demand for thinner WC based coatings, which are still dense and wear resistant. This demand has progressively increased, and the trend shows a further growth in the need for thermal spray feedstock for HVAF sprayed net shape coatings. The challenge for powder producers lies in providing suitable spray powders, with high and consistent quality as well as in considerable volume, to be able to make reliable recommendations to the users of HVAF technology. A deeper understanding of powder requirements for net shape coatings, matching the needs with new powder solutions, and appreciation of the differences in behavior or performance depending on powder type are essential to address the above challenges and constitutes the theme of this paper.","PeriodicalId":114755,"journal":{"name":"International Thermal Spray Conference","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125795264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0