Deposition of aluminum powder by cold spray micronozzle

Sova, A.; Smurov, I.; Doubenskaia, M.; Petrovskiy, P.

doi:10.1007/s00170-017-1443-2

Cited by 21 publications

(9 citation statements)

References 29 publications

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“…Compared with elliptical or circular nozzles, rectangular nozzles can achieve higher particle velocities (Ref 59 - 61 ). Stenson et al (Ref 62 ) also developed nozzles of different sizes from those provided by commercial cold spray, and micro-nozzles were used to verify the resolution of cold spray in additive manufacturing. The early CGT cold spray system (Ampfing, Germany) can only work at 30 bar pressure and 600 °C.…”

Section: Cold Spray System Developmentsmentioning

confidence: 99%

Current Implementation Status of Cold Spray Technology: A Short Review

et al. 2022

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In recent years, cold spray technology has attracted more and more attentions. After more than 30 years of rapid development, research focus of cold spray technology is gradually shifting from fundamental and theoretical studies to application developments, some of which have been industrialized and mass-produced. In this paper, the characteristics of cold spray technology, cold spray materials perspectives and cold spray system developments were briefly introduced. Besides, the recent developments of cold spray applications in different fields including aerospace, biomedical, energy, electronics, semiconductor fields were discussed. Although cold spray technology is in the early stages of implementation, it has demonstrated a great potential to reduce costs and improve performance. World-wide awareness of ongoing and planned cold spray programs is critical to expand its applications and benefits.

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Section: Cold Spray System Developmentsmentioning

confidence: 99%

Current Implementation Status of Cold Spray Technology: A Short Review

et al. 2022

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“…The internal dimensions of the Laval nozzle affect the particle acceleration [33]. A lot of relevant works have been performed, as shown in Table 1 [34][35][36][37][38][39][40][41][42][43][44]. Most of the published studies focus on the optimization of the nozzle expansion ratio (the ratio of exit to throat cross-sectional area) [34][35][36][37] and divergent length [34,[36][37][38].…”

Section: Introductionmentioning

confidence: 99%

“…Fewer studies have focused on the effect of convergent length [39] on Al powders. Micronozzles for energy-efficient spraying have been investigated with Al and Ti powders [40][41][42]. Single Ti particle impact behavior has been investigated in the deposition of Ti [43].…”

Section: Introductionmentioning

confidence: 99%

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Cold Spray Additive Manufacturing of Ti6Al4V: Special Nozzle Design Using Numerical Simulation and Experimental Validation

Cao

Zhang

et al. 2022

Coatings

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Cold spray additive manufacturing (CSAM) shows great potential in titanium-alloy production as it is a solid-state process. However, data published so far have demonstrated the difficulty of producing dense and high-strength Ti alloy parts. Our previous studies have shown that nozzle design together with high-cost helium propulsive gas plays a crucial role in particle acceleration. In this work, special nozzles for Ti alloy were designed and validated experimentally with commercially available Ti6Al4V powder. Simulation results show that particle impact temperature increases remarkably for a long convergent length, while particle kinetic energy slightly increases, which is validated by experiments. The relationship between the particle impact temperature and practice diameter shows the first increase and then decrease. The experimental results show that as the nozzle convergent section becomes longer, the edges of the single-pass deposits become smoother, and the width, density, deposition efficiency, and microhardness of the single-pass deposits increase.

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“…[15] have reviewed the gas and particle interactions in cold spraying. Particle velocities has been modelled by using computational fluid dynamics (CFD) models [14,16] and experimentally investigated by using different measuring techniques such as laser-2-focus (L2F) [17], doppler picture velocimetry (DPV) [18][19][20][21], and particle imaging velocimetry (PIV) [22][23][24][25]. Also, we have demonstrated the advanced optical diagnostic method called PTV (particle tracking velocimetry) or S-PTV (sizing-particle tracking velocimetry) [26], which is based on the PIV approach.…”

Section: Introductionmentioning

confidence: 99%

Cold-Sprayed Al6061 Coatings: Online Spray Monitoring and Influence of Process Parameters on Coating Properties

Koivuluoto

Larjo²,

Marini

et al. 2020

Coatings

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Process optimization and quality control are important issues in cold spraying and coating development. Because the cold spray processing is based on high kinetic energy by high particle velocities, online spray monitoring of particle inflight properties can be used as an assisting process tool. Particle velocities, their positions in the spray jet, and particle size measurements give valuable information about spraying conditions. This, in turn, improves reproducibility and reliability of coating production. This study focuses on cold spraying of Al6061 material and the connections between particle inflight properties and coating characteristics such as structures and mechanical properties. Furthermore, novel 2D velocity scan maps done with the HW CS2 online spray monitoring system are presented as an advantageous powder and spray condition controlling tool. Cold spray processing conditions were similar using different process parameters, confirmed with the online spray monitoring prior to coating production. Higher particle velocities led to higher particle deformation and thus, higher coating quality, denser structures, and improved adhesions. Also, deposition efficiency increased significantly by using higher particle velocities.

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Deposition of aluminum powder by cold spray micronozzle

Cited by 21 publications

References 29 publications

Current Implementation Status of Cold Spray Technology: A Short Review

Current Implementation Status of Cold Spray Technology: A Short Review

Cold Spray Additive Manufacturing of Ti6Al4V: Special Nozzle Design Using Numerical Simulation and Experimental Validation

Cold-Sprayed Al6061 Coatings: Online Spray Monitoring and Influence of Process Parameters on Coating Properties

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