International Thermal Spray Conference最新文献_第9页

A Concept of Aerospike Nozzle for Cold Spray Additive Manufacturing—Towards a Potential Solution for Preventing the Issue of Clogging 用于冷喷涂增材制造的气刺喷嘴的概念——探讨防止堵塞问题的潜在解决方案

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0229

R. Raoelison, S. Msolli, S. Deng, A. Vashishtha, Ajay Sharma, D. Callaghan, Wassim Zaim-Mounajed, Teng Zhang, E. Padayodi, J. Sagot, Ramesh Raghavendra

{"title":"A Concept of Aerospike Nozzle for Cold Spray Additive Manufacturing—Towards a Potential Solution for Preventing the Issue of Clogging","authors":"R. Raoelison, S. Msolli, S. Deng, A. Vashishtha, Ajay Sharma, D. Callaghan, Wassim Zaim-Mounajed, Teng Zhang, E. Padayodi, J. Sagot, Ramesh Raghavendra","doi":"10.31399/asm.cp.itsc2023p0229","DOIUrl":"https://doi.org/10.31399/asm.cp.itsc2023p0229","url":null,"abstract":"\u0000 The clogging, a frequent gas passage deformation phenomenon because of powder accumulation on inner nozzle wall, is a major issue in long duration Cold Spray (CS) operations and a major challenge for Cold spray technology to be adopted for additive manufacturing. This study aims to design and integrate new nozzle design in Cold Spray operations for addressing the clogging issues in traditional circular convergent-divergent (CD) nozzles. The concept of the Aerospike nozzle is proposed for that purpose and is investigated using numerical simulation methods in this paper. An aerospike nozzle allows gases to accelerate externally bounded by environment on one-side and contoured spike wall on other side. After accelerating along the spike wall, aerospike nozzle can generate a longer supersonic gas stream. The spike region can be truncated near the tip to provide a flat face for powder injection. This proposed strategy will allow powder particles to accelerate through a longer supersonic core region, without interacting with nozzle wall. With appropriate operating parameters, an aerospike nozzle can reduce or eliminate the clogging issue completely. The efficiency and operation of aerospike nozzle is compared with same Mach number C-D nozzle using numerical simulations at stagnation pressure of 30 bar and temperature of 623K, where the aluminium powder particles are injected at 30 g/min in the centerline of both nozzles and are accelerated to similar velocities. The powder particles are accelerated in supersonic core region of aerospike nozzle without interacting with nozzle wall, it is concluded that the aerospike nozzle can be a promising nozzle design to provide clogging free long duration CS operations.","PeriodicalId":114755,"journal":{"name":"International Thermal Spray Conference","volume":"42 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":"115946639","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

Enhancing Production Control for PTWA Engine Bore Coating 加强PTWA发动机内径涂料的生产控制

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0070

K. Kowalsky, D. Barton, D. Cook, C. Berghorn

{"title":"Enhancing Production Control for PTWA Engine Bore Coating","authors":"K. Kowalsky, D. Barton, D. Cook, C. Berghorn","doi":"10.31399/asm.cp.itsc2023p0070","DOIUrl":"https://doi.org/10.31399/asm.cp.itsc2023p0070","url":null,"abstract":"\u0000 Plasma Transferred Wire Arc (PTWA) is a well-established thermal spray process that is used in high-volume production by multiple automotive OEMs. Benefits of these PTWA thermal spray coatings include closer bore spacing, improved thermal transfer, lower bore distortion, increased resistance to corrosion and abrasion, reductions in weight and friction, enhanced durability, and product cost savings. For automobiles, this leads to increased fuel economy and lower emissions. Millions of engine cylinder bores per year are coated using the PTWA thermal spray process. To ensure optimal surface coatings, it is vital to monitor the process variables. Although some process monitoring already exists in current production, new technological advancements allow for additional variables to be monitored. Arc voltage is of particular importance as it can be viewed real-time in situ to the PTWA process to determine the curvature of the feedstock wire. Straight wire is ideal for achieving peak system performance. If the wire has excessive curvature, it can lead to out-of-tolerance conditions that detrimentally affect the quality of the surface coating. Therefore, in-situ monitoring of wire curvature is both desirable and necessary for producing the highest quality PTWA thermal spray coatings possible.","PeriodicalId":114755,"journal":{"name":"International Thermal Spray Conference","volume":"15 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":"132767229","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

Thermo-Physical Properties of Plasma-Sprayed K2Ti6O13 Coatings for Diesel Engine Piston 等离子喷涂K2Ti6O13柴油机活塞涂层的热物理性能

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0062

Yina Sun, Yong Zhu, Xiao-Tao Luo, Jiu-tao Gao, Chang Li

{"title":"Thermo-Physical Properties of Plasma-Sprayed K2Ti6O13 Coatings for Diesel Engine Piston","authors":"Yina Sun, Yong Zhu, Xiao-Tao Luo, Jiu-tao Gao, Chang Li","doi":"10.31399/asm.cp.itsc2023p0062","DOIUrl":"https://doi.org/10.31399/asm.cp.itsc2023p0062","url":null,"abstract":"\u0000 A new challenge in the transport systems concerns with improving efficiency. Thermal swing coatings are interesting candidates for internal combustion engines due to their potential to reduce cooling requirements and increase efficiency. K2Ti6O13 (KTO) thermal barrier coatings (TBCs) were prepared by atmospheric plasma spraying through powder structure design and optimization of deposition conditions. The thermophysical properties of plasma-sprayed KTO deposits and their effect on the thermal swing have been investigated. Their thermal conductivities were tested by a laser flash method and the thermal performance of the coatings was further examined by thermal swing test. The phases, nominal chemical compositions and microstructure of KTO deposits were characterized by X-ray diffraction (XRD) and scanning electron microscopy combined with energy dispersive spectrometry (SEM-EDS). The results indicated that the chemical composition change occurs to the coatings resulting in a deviation from nominal stoichiometry due to chemical reactions between the plasma gas and particles. The thermal conductivity of the coating is very sensitive to the coating compositions, and the coating prepared using porous powder under pure argon presents a single K2Ti6O13 phase and high porosity, and the lowest thermal conductivity of 0.85 W/m·K.","PeriodicalId":114755,"journal":{"name":"International Thermal Spray Conference","volume":"27 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":"132231904","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

A Novel Antibacterial and Biocompatible Ta-Ag Coating Fabricated by Cold Spray Technology 冷喷涂技术制备的新型抗菌生物相容性Ta-Ag涂层

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0054

Pengfei Yu, Shuo Yin, R. Lupoi, F. O'Brien, Katelyn J Genoud, Yingchun Xie

{"title":"A Novel Antibacterial and Biocompatible Ta-Ag Coating Fabricated by Cold Spray Technology","authors":"Pengfei Yu, Shuo Yin, R. Lupoi, F. O'Brien, Katelyn J Genoud, Yingchun Xie","doi":"10.31399/asm.cp.itsc2023p0054","DOIUrl":"https://doi.org/10.31399/asm.cp.itsc2023p0054","url":null,"abstract":"\u0000 Infection caused by bacterial contamination is a critical problem challenging the successful use of medical implants in orthopaedic and dental applications. Consequently, medical implants with antibacterial abilities are in high demand. Tantalum and silver have been previously characterized to have excellent biocompatibility and antibacterial ability, but due to their significantly different properties, it is challenging to manufacture Ta-Ag components via thermal processing methods. Herein, by taking advantage of the unique characteristics of cold spray (CS) technology, an antibacterial Ta-Ag coating was successfully fabricated for the first time. In the CS process, blended Ta-Ag powders with different Ag concentrations were used to fabricate CS Ta-Ag coatings. Their antibacterial ability was preliminary tested and deposition behaviour was systematically investigated. The coating significantly reduced the metabolic activity of S. aureus bacteria, and a better deposition efficiency was obtained by blended Ta-Ag powder. It was found that soft Ag could aggregate in the coating and hard Ta particles were prone to rebound, which induced the peening effect for Ag and mass loss of Ta in the final coating Moreover, the clue of metallurgy bonding between Ta and Ag was detected in the region that experienced severe deformation despite their immiscibility.","PeriodicalId":114755,"journal":{"name":"International Thermal Spray Conference","volume":"362 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":"127688879","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

Antipathogenic Coatings for Antibiotics Reduction in Broiler Farming 肉鸡养殖中减少抗生素使用的抗菌涂层

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0717

Anne Breitrück, B. Kreikemeyer, K. Henkel

引用次数: 0

Influence of Current Modulation on Particle Sizes by Wire Arc Atomizing 电弧雾化电流调制对颗粒尺寸的影响

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0310

S. Weis, S. Brumm, R. Grunert, Manuel Halmaghi, Jan Morgenschweis, Jürgen Bosler

{"title":"Influence of Current Modulation on Particle Sizes by Wire Arc Atomizing","authors":"S. Weis, S. Brumm, R. Grunert, Manuel Halmaghi, Jan Morgenschweis, Jürgen Bosler","doi":"10.31399/asm.cp.itsc2023p0310","DOIUrl":"https://doi.org/10.31399/asm.cp.itsc2023p0310","url":null,"abstract":"\u0000 Additive manufacturing with metal powders enables a high degree of design diversity and an enormous material flexibility for components. The development of new products using special alloys requires just a small amount of powder. Therefore, a wire arc spraying process using nitrogen is applied for powder production by atomizing. The remaining oxygen content, the nitrogen temperature and pressure in the atomizing chamber are monitored to ensure consistent quality. The power source enables direct current (DC) and alternating current (AC). Further parameters like basic current Iground, pulse current Ipulse, pulse duration tpulse, impulse frequency fpulse and alternating current frequency fAC can be varied. On the process side, the following parameters are recorded during the tests: current, voltage, wire feed speed and flow rate of the atomizing gas as well as oxygen content and temperature inside the spray chamber. These parameters have an influence on particle size and composition. The aim is to influence the melting behavior by electrical and other process parameters. The investigations are carried out on solid wires made of an iron-based alloy EN ISO 14341-A: G42 4 M21/2 C1 3 Si1, AWS A 5.18: ER 70-6.","PeriodicalId":114755,"journal":{"name":"International Thermal Spray Conference","volume":"710 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":"114400565","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

Analyzing Cold Spray of Polymer-Coated Metal Particles on Polymeric and Composite Substrates 聚合物和复合基材上涂覆金属颗粒的冷喷涂分析

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0222

N. Singh, Nicholas Beau Mennie, I. Nault, B. Koohbor, F. Haas, R. Jha

{"title":"Analyzing Cold Spray of Polymer-Coated Metal Particles on Polymeric and Composite Substrates","authors":"N. Singh, Nicholas Beau Mennie, I. Nault, B. Koohbor, F. Haas, R. Jha","doi":"10.31399/asm.cp.itsc2023p0222","DOIUrl":"https://doi.org/10.31399/asm.cp.itsc2023p0222","url":null,"abstract":"\u0000 Metallization of polymers and fiber-reinforced polymer composites is gaining attention due to the widespread application of these components in various industries, such as wind energy, aerospace, and automotive industries. Cold spray is a promising new technique to achieve the metallization of polymer and fiber-reinforced polymer composites. This work investigates the deposition mechanisms of polymer-coated metallic particles on polymer-based substrates by finite element analyses. Impact mechanics of PEEK-coated nickel particles impacting PEEK and carbon fiber-reinforced PEEK substrates are modeled. Results show the prominence of mechanical interlocking of metallic particles in the substrate, which occurs due to their entrapment inside the substrate, caused by the high energy impact-induced welding of scraped PEEK coating. The PEEK coating acts as a cushioning component, effectively mitigating the impact energy of the metallic component. The scraped PEEK coating also accumulates on the upper half of the particle, forming a cap welded to the substrate and sealing the metallic particle inside. It is observed that the depth of the carbon fiber mat in the substrate affects the mechanism and the success of deposition.","PeriodicalId":114755,"journal":{"name":"International Thermal Spray Conference","volume":"80 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":"114746016","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

Automated Path and Trajectory Planning for Automated Repair of Damaged Components by Cold Spray 冷喷涂损伤部件自动修复的自动路径和轨迹规划

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0436

Marcel Lewkea, Hongjian Wu, A. List, F. Gärtner, T. Klassen, A. Fay

{"title":"Automated Path and Trajectory Planning for Automated Repair of Damaged Components by Cold Spray","authors":"Marcel Lewkea, Hongjian Wu, A. List, F. Gärtner, T. Klassen, A. Fay","doi":"10.31399/asm.cp.itsc2023p0436","DOIUrl":"https://doi.org/10.31399/asm.cp.itsc2023p0436","url":null,"abstract":"\u0000 Cold spraying has emerged as a promising technique for the repair of metallic components. For controlled material deposition, manipulation of the cold spray gun is performed by industrial robots. Such robot-guided cold spraying provides flexible control and automation of the entire process. To enable effective and material-efficient material deposition at specified repair locations, this work proposes a method for automated planning of cold spray paths and trajectories. The method begins with the extraction of the volume to be filled by comparing the nominal and actual component. To produce the extracted volume, it is divided into suitable adaptively curved layers and converted into point clouds for path planning. The cold spray path is then converted into a trajectory by adding a suitable velocity distribution for the spray velocity to produce the required locally varying layer thickness. To validate the suitability of the path and trajectory, a simulation of the material deposition is performed. In addition, the implementation of the entire method is demonstrated by exemplary use cases. The results demonstrate that the proposed method enables successful automated path and trajectory planning, both contributing to the overall goal of automated repair of damaged components by cold spray.","PeriodicalId":114755,"journal":{"name":"International Thermal Spray Conference","volume":"20 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":"122095536","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

Case Study on the Application of Microstructural Features Extracted by Convolutional Neural Network for Cold Spray of Aluminum Alloys 基于卷积神经网络的铝合金冷喷涂微观组织特征提取实例研究

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0009

Siyu Tu, P. Vo

引用次数: 0

A Novel Approach to In Situ Coating Thickness Measurements in Thermal Spraying 热喷涂现场涂层厚度测量的新方法

International Thermal Spray Conference Pub Date : 2023-05-22 DOI: 10.31399/asm.cp.itsc2023p0142

U. Hudomalj, E. F. Sichani, L. Weiss, M. Nabavi, K. Wegener

{"title":"A Novel Approach to In Situ Coating Thickness Measurements in Thermal Spraying","authors":"U. Hudomalj, E. F. Sichani, L. Weiss, M. Nabavi, K. Wegener","doi":"10.31399/asm.cp.itsc2023p0142","DOIUrl":"https://doi.org/10.31399/asm.cp.itsc2023p0142","url":null,"abstract":"\u0000 Coating thickness is considered to be one of the most important characteristics of thermally sprayed coatings. Despite this, there is a lack of a measurement method that could evaluate in situ the coating thickness with a sufficient accuracy that could be used as a feedback signal for online, closed-loop control. Offline methods that produce spatially resolved coating thickness measurements by capturing the surface topography have already been demonstrated to provide results with a high accuracy, comparable to the standard reference microscopical measurement method. However, up to now, the approach has not been applied in situ. This paper presents a novel approach to in situ measure spatially resolved coating thickness. It is based on a differential distance measurement of sample thickness before and after applying the coating. A high-resolution 3D camera is used to capture the surface topography and include it in the thickness measurement. The technique provides a 3D view of the deposited coating thickness measured in situ and gives results with excellent accuracy when compared to the reference microscopical method.","PeriodicalId":114755,"journal":{"name":"International Thermal Spray Conference","volume":"10 1 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":"116788107","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