Analysis and optimization of the HVOF process by combined experimental and numerical approaches

Dongmo, E.; Wenzelburger, Martin; Gadow, Rainer

doi:10.1016/j.surfcoat.2008.04.029

Cited by 88 publications

(47 citation statements)

References 12 publications

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“…During the past 15 years, the eddy dissipation model has been usually used to simulate gaseous and liquid fuels combustion in the HVOF process and has been providing acceptable results (see [60][61][62][63][64][65][66][67][68][69]). In an interesting article, Kamnis and Gu [66] used different types of combustion models to simulate the HVOF system operated on liquid propane.…”

Section: Combustion Simulationmentioning

confidence: 99%

A Comprehensive Review on Fluid Dynamics and Transport of Suspension/Liquid Droplets and Particles in High-Velocity Oxygen-Fuel (HVOF) Thermal Spray

2015

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Abstract:In thermal spraying processes, molten, semi-molten, or solid particles, which are sufficiently fast in a stream of gas, are deposited on a substrate. These particles can plastically deform while impacting on the substrate, which results in the formation of well-adhered and dense coatings. Clearly, particles in flight conditions, such as velocity, trajectory, temperature, and melting state, have enormous influence on the coating properties and should be well understood to control and improve the coating quality. The focus of this study is on the high velocity oxygen fuel (HVOF) spraying and high velocity suspension flame spraying (HVSFS) techniques, which are widely used in academia and industry to generate different types of coatings. Extensive numerical and experimental studies were carried out and are still in progress to estimate the particle in-flight behavior in thermal spray processes. In this review paper, the fundamental phenomena involved in the mentioned thermal spray techniques, such as shock diamonds, combustion, primary atomization, secondary atomization, etc., are discussed comprehensively. In addition, the basic aspects and emerging trends in simulation of thermal spray processes are reviewed. The numerical approaches such as Eulerian-Lagrangian and volume of fluid along with their advantages and disadvantages are explained in detail. Furthermore, this article provides a detailed review on simulation studies published to date. OPEN ACCESSCoatings 2015, 5 577

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Section: Combustion Simulationmentioning

confidence: 99%

A Comprehensive Review on Fluid Dynamics and Transport of Suspension/Liquid Droplets and Particles in High-Velocity Oxygen-Fuel (HVOF) Thermal Spray

2015

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“…Mathematical modeling is an excellent complement to the experimental approach. It provides a fundamental understanding of the underlying momentum and heat-transfer mechanisms, which in turn, might be used to guide system design and operation (Ref 6,7). Moreover, the compensation of feed disturbances and process variability during real-time process operation becomes essential in order to fabricate coatings of a consistent quality.…”

Section: High-velocity Oxygen Fuel (Hvof) Is a Thermal Spray Techniqumentioning

confidence: 99%

Modeling and Control of High-Velocity Oxygen-Fuel (HVOF) Thermal Spray: A Tutorial Review

Christofides

2009

J Therm Spray Tech

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This work provides a tutorial overview of recent research efforts in modeling and control of the high-velocity oxygen-fuel (HVOF) thermal spray process. Initially, the modeling of the HVOF thermal spray, including combustion, gas dynamics, particle in-flight behavior, and coating microstructure evolution is reviewed. The influence of the process operating conditions as predicted by the fundamental models on particle characteristics and coating microstructure is then discussed and compared with experimental observations. Finally, the issues of measurement and automatic control are discussed and comments on potential future research efforts are made.

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“…In comparison to the other method such as electrophoretic coating for pure HAp, the coating does not require any heat treatment or post-deposition for consolidation. Furthermore, the method features relatively lower processing cost with high and eicient productivity [101,102]. As compared to conventional dry powders, the suspension based feedstock could ignite more lexibility in creating new composite materials by altering the material compositions in which controlling the primary particle morphology [103,104].…”

Section: High-velocity Suspension Plasma-sprayingmentioning

confidence: 99%

Hydroxyapatite-Based Coating on Biomedical Implant

Harun¹,

Asri²,

Sulong³

et al. 2018

Hydroxyapatite - Advances in Composite Nanomaterials, Biomedical Applications and Its Technological Facets

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The use of metallic biomaterials for replacement of biomedical implants has been traced back from the nineteenth century. These metallic biomaterials have been declared as clinical success as their mechanical properties that satisfy the prerequisite of the human bone. Nevertheless, critical issues of the materials when they are utilised as implants; including the releasing toxic and harmful metal ions through wear and corrosion processes after longer implantation. Besides that, the bonding strength between bone and implants itself is considered weak due to the diferent components of human bone and metal implants. Hence, developing hydroxyapatite (HAp) coating on metallic biomaterials is expected to overcome the problems faced by biocompatible metallic biomaterials. As far as this, various commercial techniques have been introduced to develop the HAp coating on metallic biomaterials. The techniques are including plasma-spraying method, sol-gel dip-coating, electrochemical deposition and high-velocity suspension plasma-spraying. The formation of HAp coating on metallic biomaterials improved the corrosion resistance together promoting its load-bearing ability and enhanced substrate-coating adhesion.

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Analysis and optimization of the HVOF process by combined experimental and numerical approaches

Cited by 88 publications

References 12 publications

A Comprehensive Review on Fluid Dynamics and Transport of Suspension/Liquid Droplets and Particles in High-Velocity Oxygen-Fuel (HVOF) Thermal Spray

A Comprehensive Review on Fluid Dynamics and Transport of Suspension/Liquid Droplets and Particles in High-Velocity Oxygen-Fuel (HVOF) Thermal Spray

Modeling and Control of High-Velocity Oxygen-Fuel (HVOF) Thermal Spray: A Tutorial Review

Hydroxyapatite-Based Coating on Biomedical Implant

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