In-flight aggregation and deposition behaviour of particles in low pressure cold spray

Wang, Ziyu; Cai, Shun; Jin, Kai; Wang, Xingxing; Chen, Wenliang

doi:10.1016/j.surfcoat.2021.126875

Cited by 9 publications

(9 citation statements)

References 29 publications

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“…However, increasing Al 2 O 3 content decreases deposition efficiency from 22.3% to 18.6%. In addition, Wang et al [92] simulated the deposition of Al powders onto 20 steel substrates at cold spray process parameters. Figure 9 shows that the temperature of the CS significantly influences the morphology of the particle when deposited onto the substrate.…”

Section: Recent Development Of Cold Spray For Coating Applicationmentioning

confidence: 99%

Remarkable Potential of Cold Spray in Overlay Restoration for Power Plants: Key Challenges, Recent Developments, and Future Prospects

Afandi,

Mahalingam,

Tan

et al. 2023

Coatings

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Cold spray has become a prominent deposition technology for coating, repair, and restoration in many industries, such as the aerospace, automotive, and power generation industries. It also has the potential to be used as an alternative overlay restoration for power plant components as it has minimal thermal distortion phase changes, as compared to conventional welding and thermal spray. This article aims to bridge the gap in the scientific literature by presenting a comprehensive review of cold spray in the context of power plant components. Firstly, this review examines the challenges of cold spray and subsequently elucidates effective mitigation strategies. Secondly, the review analyses the recent development of cold spray in the field of coating application. Moving forward, it investigates the integration of cold spray technology in repair applications, focusing on practical implementation and effectiveness. Finally, the review presents the overall impact of cold spray, its current outlook, and discusses future prospects. As such, the review will provide the community with a broad understanding of cold spray applications in the power plant sector.

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Section: Recent Development Of Cold Spray For Coating Applicationmentioning

confidence: 99%

Remarkable Potential of Cold Spray in Overlay Restoration for Power Plants: Key Challenges, Recent Developments, and Future Prospects

Afandi,

Mahalingam,

Tan

et al. 2023

Coatings

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“…The microstructure of the sample PFR 3 (Figure 3) revealed the most uniform and evenly distributed flux coating with a thickness in the range of 70-90 µm. In the LPCS process, the working gas decompresses in the divergent part of the de Laval nozzle, which is accompanied by a decreasing temperature [34][35][36]. However, the temperature can be regulated and increased by increased mass of powder particles, which are introduced at the beginning of the divergent part of the nozzle, where the gas temperature is the highest [37].…”

Section: Preliminary Quality Evaluation Of the Sprayed Flux Layersmentioning

confidence: 99%

A new approach to flux deposition for brazing aluminium by low pressure cold spraying

Wojdat

Winnicki

Pabian

2022

Materials Science-Poland

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This paper presents the results of study on the possibility of Nocolok flux deposition to aluminium substrates using the low-pressure cold gas spraying (LPCS) method. An innovative method of applying flux in the form of a powder without organic adhesive additives was proposed, allowing strict control of the deposited material. The influence of the flux powder feeding rate (PFR – 4.5 g/min, 6.3 g/min and 8.5 g/min) on the efficiency of the brazing process of AA3003 aluminium alloy plates was investigated. The results of energy dispersive spectrometry (EDS) analysis of the deposited flux coatings are presented for various process parameters. The wettability tested by spreading the B-AlSi12 filler metal on flux-covered aluminium substrates increased significantly with increasing PFR – the contact angle decreased from 21.0° to 4.6°. Microstructure analysis confirmed the high quality of the brazed joints, which were devoid of braze incompatibilities.

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“…The formation of vicinity of the interface assists metallurgical bonding, which resul strength between ductile Al particles and the Al2O3 monocryst Therefore, there are many factors that influence the adhesion s optimization to achieve the best adhesion strength of the CS coat Pre-treatments are used: for example, modifying the substra grit blasting, pre-heating the substrate to circumvent the residu adjusting the substrate hardness by thermal treatment [64][65][66]. C as particle velocity, gas temperature, nozzle geometry, stand-o and morphology, and type of the process gas play significant ro final coating and the bonding mechanism at the interface [46,67-Additionally, the type and model of the CS system influence [70]. There are several parameters (highlighted in Figure 3) tha mechanism and these need to be adjusted for specific particle-su Pre-treatments are used: for example, modifying the substrate surface roughness by grit blasting, pre-heating the substrate to circumvent the residual stress evolution, and adjusting the substrate hardness by thermal treatment [64][65][66].…”

Section: Adhesion Mechanism In Cold Spraymentioning

confidence: 99%

“…Additionally, the type and model of the CS system influence the bonding mechanism [70]. There are several parameters (highlighted in Figure 3) that influence the bonding mechanism and these need to be adjusted for specific particle-substrate combinations.…”

Section: Adhesion Mechanism In Cold Spraymentioning

confidence: 99%

Influence of Cold Spray Parameters on Bonding Mechanisms: A Review

Singh

Raman

Berndt

et al. 2021

Metals

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The cold spray process is governed by the impact of high velocity feedstock particles onto a substrate without melting. Hence, the bulk material properties are retained. However, it is challenging to achieve good adhesion strength. The adhesion strength depends on factors such as the cold spray process parameters, substrate conditions, coating/substrate interactions at the interface and feedstock material properties. This review examines fundamental studies concerning the adhesion mechanisms of cold spray technology and considers the effect of cold spray input parameters such as temperature, stand-off-distance, pressure, process gas, spray angle, and traverse speed of the cold spray torch on the bonding mechanism and adhesion strength. Furthermore, the effects of substrate conditions such as temperature, hardness, roughness and material on the adhesion mechanism are highlighted. The effect of feedstock properties, such as feed rate, shape and size are summarized. Understanding the effect of these parameters is necessary to obtain the optimal input parameters that enable the best interfacial properties for a range of coating/substrate material combinations. It is expected that feedstock of spherical morphology and small particle size (<15 μm) provides optimal interfacial properties when deposited onto a mirror-finished substrate surface using high pressure cold spray. Deep insights into each parameter exposes the uncovered potential of cold spray as an additive manufacturing method.

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In-flight aggregation and deposition behaviour of particles in low pressure cold spray

Cited by 9 publications

References 29 publications

Remarkable Potential of Cold Spray in Overlay Restoration for Power Plants: Key Challenges, Recent Developments, and Future Prospects

Remarkable Potential of Cold Spray in Overlay Restoration for Power Plants: Key Challenges, Recent Developments, and Future Prospects

A new approach to flux deposition for brazing aluminium by low pressure cold spraying

Influence of Cold Spray Parameters on Bonding Mechanisms: A Review

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