Microstructural and bulk properties evolution of cold-sprayed copper coatings after low temperature annealing

Yu, Bosco; Tam, Jason; Li, W.; Cho, Hai Jun; Legoux, J.-G.; Poirier, Dominique; Giallonardo, Jason D.; Erb, U.

doi:10.1016/j.mtla.2019.100356

Cited by 31 publications

(16 citation statements)

References 58 publications

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“…The example in this study applies the technique to the fracture of the AS‐CS Cu material in tension using a NewTec in‐situ SEM tensile testing stage. This method allows for testing polycrystalline regions, resulting in better comparisons with bulk mechanical properties, as reported by Yu et al [ 32 ]…”

Section: Resultsmentioning

confidence: 99%

“…ED Cu generally has a homogeneous solid solution microstructure with a small grain size (<5 µm) and a strain to failure in tension of approximately 40%. [32] The CS Cu is formed by accelerating particles at supersonic speeds toward the carbon steel surface of the container. This results in highly deformed particle-particle interfaces, with the peripheries of these regions having a nanocrystalline microstructure, and grain size < 100 nm, which has been thoroughly characterized by Tam et al [32,33] Furthermore, pre-existing oxygen in the Cu powder or accumulated during the acceleration process is preferentially trapped at particle-particle interfaces, resulting in oxygen-rich pores and interfaces.…”

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confidence: 99%

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Applying state‐of‐the‐art microscopy techniques to understand the degradation of copper for nuclear waste canisters

Persaud

Binns

Guo

et al. 2023

Materials & Corrosion

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The metallurgy, mechanical properties, and corrosion of Cu, proposed as the corrosion barrier for Canadian used fuel containers (UFCs) for use in a deep geological repository (DGR), have been studied for decades. Bulk properties have been reported, and the knowledge applied to strengthen the performance of Cu produced by electrodeposition and cold spray. Despite this success, many degradation mechanisms are unclear from bulk testing, which cannot capture nanoscale phenomena driving degradation. This study provides examples using state‐of‐the‐art microscopy to understand mechanisms of Cu degradation, specifically for UFCs. Subtle changes in the electrodeposited Cu microstructure due to oxygen segregation are observed using atom probe tomography (APT). In aggressive sulfide‐containing environments, corrosion of the cold‐sprayed Cu occurs along particle–particle interfaces, likely inherent to the manufacturing process. Microscale tensile testing at particle–particle interfaces confirms brittle cracking in the cold‐sprayed Cu. Although experiments are not consistent with DGR conditions, results do warrant further study on the performance of the cold‐sprayed Cu in particular.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Applying state‐of‐the‐art microscopy techniques to understand the degradation of copper for nuclear waste canisters

Persaud

Binns

Guo

et al. 2023

Materials & Corrosion

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show abstract

“…Metal diffusion has recovered most of the weak bonded interfaces, and the pores in the coating/AM began to become smooth and spherical. As shown in Figure 12 (Yu et al, 2019), it is found through EBSD technology (Yu et al, 2019;Hall et al, 2006) that the splat-splat interface in the as-spray coating/ AM disappeared, and the ultrafine nanocrystals around the interface have become fine equiaxed grains. It is worth mentioning that many studies (Wong et al, 2012;Yu et al, 2019;Li et al, 2006;Rokni et al,2017aRokni et al, , 2017bKang et al, 2012) have shown that in as-spray materials, these pores are usually located at the intersection of the splat-splat interface and the pore shape is irregular.…”

Section: Post-spray Treatments For Cold Sprayed Depositsmentioning

confidence: 99%

“…As shown in Figure 12 (Yu et al, 2019), it is found through EBSD technology (Yu et al, 2019;Hall et al, 2006) that the splat-splat interface in the as-spray coating/ AM disappeared, and the ultrafine nanocrystals around the interface have become fine equiaxed grains. It is worth mentioning that many studies (Wong et al, 2012;Yu et al, 2019;Li et al, 2006;Rokni et al,2017aRokni et al, , 2017bKang et al, 2012) have shown that in as-spray materials, these pores are usually located at the intersection of the splat-splat interface and the pore shape is irregular. When the coating/AM is stressed, these pores or weak bonding interfaces will become the source of cracks.…”

Section: Post-spray Treatments For Cold Sprayed Depositsmentioning

confidence: 99%

Cold spray micro-defects and post-treatment technologies: a review

Wang

Han

Huang

et al. 2021

RPJ

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Purpose The deposition of particles onto a substrate during the cold spraying (CS) process relies on severe plastic deformation, so there are various micro-defects induced by insufficient deformation and severe crushing. To solve the problems, many post-treat techniques have been used to improving the quality by eliminating the micro-defects. This paper aims to help scholars and engineers in this field a better and systematic understand of CS technology by summarizing the post-treatment technologies that have been investigated recently years. Design/methodology/approach This review summarizes the types of micro-defects and introduces the effect of micro-defects on the properties of CS coating/additive manufactured, illustrates the post-treatment technologies and its effect on the microstructure and performances, and finally outlooks the future development trends of post-treatments for CS. Findings There are significant discoveries in post-treatment technology to change the performance of cold spray deposits. There are also many limitations for post-treatment methods, including improved performance and limitations of use. Thus, there is still a strong requirement for further improvement. Hybrid post-treatment may be a more ideal method, as it can eliminate more defects than a single method. The proposed ultrasonic impact treatment could be an alternative method, as it can densify and flatten the CS deposits. Originality/value It is the first time to reveal the influence factors on the performances of CS deposits from the perspective of microdefects, and proposed corresponding well targeted post-treatment methods, which is more instructive for improving the performances of CS deposits.

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“…16a and e), it is dominated by cleavage fracture through weakly bonded interparticle boundaries as well as an intergranular fracture. According to Yu et al [62], the formation of nanocrystalline grains in the intensively deformed inter-splat regions as a result of recovery or dynamic recrystallization has very limited ductility. Once the crack starts from the pores or poorly bonded regions, it can propagate along these nanocrystalline grains, resulting in a cleavage fracture.…”

Section: Relationship Between the Microstructure Evolution And Mechanical Propertiesmentioning

confidence: 99%

Effect of annealing treatment on microstructure and mechanical properties of cold sprayed TiB2/AlSi10Mg composites

Xie

Chen

et al. 2021

Surfaces and Interfaces

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Microstructural and bulk properties evolution of cold-sprayed copper coatings after low temperature annealing

Cited by 31 publications

References 58 publications

Applying state‐of‐the‐art microscopy techniques to understand the degradation of copper for nuclear waste canisters

Applying state‐of‐the‐art microscopy techniques to understand the degradation of copper for nuclear waste canisters

Cold spray micro-defects and post-treatment technologies: a review

Effect of annealing treatment on microstructure and mechanical properties of cold sprayed TiB2/AlSi10Mg composites

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