Cold spray deposition: Significance of particle impact phenomena

Клинков, С. В.; Косарев, В. Ф.; Rein, Martin

doi:10.1016/j.ast.2005.03.005

Cited by 230 publications

(146 citation statements)

References 43 publications

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“…A most determining factor for bonding is the velocity of the impacting particle. Bonding occurs if the particle velocity upon impact, v pi , becomes greater than a critical value, v cr (Ref [10][11][12][13][14][15][16][17][18]. The conditions that lead to particle bonding can be identified with respect to what is referred to as window of deposition.…”

Section: Introductionmentioning

confidence: 99%

On Parameter Selection in Cold Spraying

et al. 2011

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For cold spraying, a method for the construction of the window of deposition and the selection of optimum process parameters is presented. Initially, particle impact velocity and the critical particle velocity for bonding are worked out and expressed explicitly in terms of key process and material parameters. Subsequently, the influence of particle velocity on coating characteristics is examined in view of the results of experiments and simulations. It has been found that main coating characteristics can be described as a unique function of the ratio of particle velocity to critical velocity, here referred to as g. Finally, coating properties are linked directly to primary process parameters via parameter selection maps, where contours of constant g are plotted on a plane of gas temperature versus gas pressure. Inferences of the presented method and the resulting parameter selection maps are discussed for the example of copper as feedstock material.

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Section: Introductionmentioning

confidence: 99%

On Parameter Selection in Cold Spraying

et al. 2011

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“…9,17,18 Thus, it is difficult or impossible to engineer a nanoscale surface using these manufacturing techniques. However, an NPDS has non-invasive deposition characteristics, as demonstrated by observing cross-sections with scanning electron microscopy, 19 which shows no damage on the polymer surface.…”

Section: Nanoscale Damagementioning

confidence: 99%

Nanoscale patterning and welding by solvent-free dry particle spray and focused ion beam

Choi

Kim

2014

Int. J. of Precis. Eng. and Manuf.-Green Tech.

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Nano particle deposition system (NPDS) is one of dry particle spray methods such as cold spray and aerosol deposition. It can be used to build structures from metals, ceramics, and nanomaterials without any solvents at room temperature and under low vacuum conditions, reducing energy consumption. Recent advances in dry particle spray techniques, including NPDS, have demonstrated their use with advanced nanomaterials such as carbon nanotube. However, to date, this process has not been successfully scaled down to 100-nm scales. Here, we demonstrate the use of NPDS as dry particle spray method in the nanoscale regime with the help of a focused ion beam for nanoscale manufacturing. Nanoscale patterning and welding were achieved using a nano particle deposition system with miniaturized feature sizes that were smaller than 100 nm in scale.

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“…[1][2][3] Among these, high velocity oxy-fuel (HVOF), cold spray and warm spray 3) are characterized by relatively high particle velocity and low particle temperature during deposition; the temperatures of majority or all the sprayed particles can be lower than the melting point of the powder material in these processes. Most recently, cold spraying is becoming popular by which coatings can be produced without significant heating of the sprayed powder.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Solid Particle Impact Behavior for Spray Processes

et al. 2006

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Several thermal spray processes developed recently are characterized by relatively low temperature and higher velocity of sprayed particles. They include cold spray, high velocity oxy-fuel spray, and warm spray, in which majority or all the sprayed particles are in solid phase when impinging onto the substrate surface. Therefore, in order to understand the coating formation process of such processes, detailed knowledge concerning impact phenomena of a solid particle is essential. It is generally accepted that there exists a minimum velocity beyond which a particle adheres to the substrate and this velocity is called the ''critical velocity''. How the critical velocity depends on various materials and process variables is not fully understood yet. In this study, analysis of a metal particle impacting onto a metal substrate was carried out by using a dynamic finite element code (ABAQUS). Effects of a substrate and a particle temperature on the critical velocity were numerically studied. Also, effects of thermal conduction on the simulation results were discussed. It was found that critical velocity decreases with 1) higher stiffness of the substrate, 2) higher particles temperature, and 3) greater particle size.

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Cold spray deposition: Significance of particle impact phenomena

Cited by 230 publications

References 43 publications

On Parameter Selection in Cold Spraying

On Parameter Selection in Cold Spraying

Nanoscale patterning and welding by solvent-free dry particle spray and focused ion beam

Simulation of Solid Particle Impact Behavior for Spray Processes

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