CoNiCrAlY microstructural changes induced during Cold Gas Dynamic Spraying

Richer, P.; Zúñiga, Alejandro; Yandouzi, M.; Jodoin, B.

doi:10.1016/j.surfcoat.2008.09.014

Cited by 104 publications

(58 citation statements)

References 33 publications

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“…Cold spray coatings with attractive properties have been obtained in the case of pure metals such as Cu, Al, Ti, Ni, Fe, and Ta (Ref [1][2][3][4][5][6][7][8][9] and also in the case of metallic alloys such as stainless steels, Inconel, Ni-Cr alloys, Ti-6Al-4V, and steels (Ref [10][11][12][13][14][15][16][17]. In all these coatings, the coating property and its performance are substantially influenced by the extent of bonding between the splats (powder particles which flatten on impacting the substrate are defined as splats) that make up the coating.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Parameters for Assessment of Inter-Splat Bond Strength in Cold-Sprayed Coatings

et al. 2010

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The quality and performance of cold spray coatings are largely determined by the extent and strength of bonding between the adjacent splats. Usually, the extent of inter-splat bonding is only qualitatively estimated by examining the polished and etched sectioned surfaces of the coated sample. Thus, there is a clear need for indirect techniques to quantitatively estimate the extent of inter-splat bonding so that they can serve as quality control tools. In this study, elastic modulus, electrical conductivity, and critical load for inter-splat debonding as determined using a scratch test are considered as possible parameters for the estimation of the extent of inter-splat bonding using four different cold spray coatings (Ag, Cu, 316 Stainless Steel, and Zn) as model coatings. It is demonstrated that all the three parameters are capable of quantifying the extent of inter-splat bonding.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Parameters for Assessment of Inter-Splat Bond Strength in Cold-Sprayed Coatings

et al. 2010

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“…While the coarse grains would correspond to particle region where very little deformation has occurred, as in the middle of the particle, the fine grains (size of about 90 nm) would correspond to areas of intensive plastic deformation where recrystallisation has occurred, i.e. the regions of localized shearing at particle interfaces [29]. The elongat in ig.…”

Section: Coating Microstructuresmentioning

confidence: 99%

Consolidation of Al2O3/Al Nanocomposite Powder by Cold Spray

et al. 2010

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“…In addition, it can use inert gases that hinder in-process particle surface oxidation. [7][8][9][10] These advantages make CGDS an interesting alternative for the deposition of bond coats. The present study is a part of an ongoing research project that aims to develop high-performance bond coats by means of CGDS for the manufacturing of TBCs to be applied on hot components of gas-turbine engines.…”

Section: Introductionmentioning

confidence: 99%

Influence of multiple electron-beam remeltings on the characteristics of HVOF and CGDS sprayed conicraly coatings

Krajňáková¹,

Gouvea²,

Čupera³

et al. 2018

Mater. Tehnol.

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Nanostructured CoNiCrAlY bond coatings were deposited onto a Ni-based alloy (Inconel 718) by both HVOF and CGDS spraying techniques. Subsequently, the deposits were remelted by an electron beam up to depth of about 100 μm, which resulted in the removal of defects on the substrate to the bond coat interface. This paper examines the influence of the parameters used for EB remelting, including multiple remelting on the microstructural changes, phase modification and the final state of the coatings. The amount of porosity in the coatings and the surface roughness has been evaluated. Scanning electron microscopy and X-ray diffraction were performed in order to characterize the phase modification before and after the applied treatment. The results indicated that multiple remelting improved the coating in terms of porosity, surface roughness decrease, mechanical strength and chemical homogeneity. This study also demonstrates that the CGDS deposition represents a promising alternative for CoNiCrAlY bond coat manufacturing. Keywords: bond coat, CoNiCrAlY, cold gas dynamic spraying, HVOF spraying, EB remelting Nanostrukturirane prevleke na osnovi CoNiCrAlY so avtorji prispevka nanesli na podlago iz Ni superzlitine (Inconel 718) z dvema metodama napr{evanja; z zelo hitrim napr{evanjem kovinskih delcev v toku me{anice plinastega goriva in kisika (HVOF; angl.: High Velocity Oxygen Fuel) in tehniko dinami~nega napr{evanja v hladnem plinu (CGDS; Cold Gas Dynamic Spraying). Sledilo je takoj{nje pretaljevanje napr{enih prevlek z elektronskim snopom do globine pribli`no 100 μm, kar naj bi odstranilo napake nastale med napr{evanjem in izbolj{alo povezavo prevlek s podlago. V~lanku avtorji opisujejo vpliv parametrov uporabljenega pretaljevanja z elektronskim snopom, vklju~no z vplivom ve~kratnega pretaljevanja na mikrostrukturne spremembe, fazne modifikacije in kon~no stanje prevlek. Ovrednotili so poroznost izdelanih prevlek in poroznost njihove povr{ine. Izvedli so analize z vrsti~nim elektronskim mikroskopom (SEM; angl.: Scanning Electron Microscopy) in rentgensko difrakcijo (angl.: X-Ray Diffraction), da so lahko dolo~ili fazne transformacije pred in po obdelavi prevlek. Rezultati preiskav so pokazali, da ve~kratno pretaljevanje izbolj{a kakovost prevlek v smislu zmanj{anja njihove poroznosti in povr{inske hrapavosti, izbolj{a kemijsko homogenost in trdnost. [tudija je prav tako pokazala, da izdelava prevlek na osnovi CoNiCrAlY z CGDS postopkom lahko predstavlja alternativo drugim postopkom napr{evanja te vrste prevlek. Keywords: opla{~enje, CoNiCrAlY prevleke, CGDS -dinami~no napr{evanje v hladnem plinu, HVOF -zelo hitro napr{evanje kovinskih delcev v toku me{anice goriva in kisika, pretaljevanje z elektronskim snopom

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CoNiCrAlY microstructural changes induced during Cold Gas Dynamic Spraying

Cited by 104 publications

References 33 publications

Evaluation of Parameters for Assessment of Inter-Splat Bond Strength in Cold-Sprayed Coatings

Evaluation of Parameters for Assessment of Inter-Splat Bond Strength in Cold-Sprayed Coatings

Consolidation of Al2O3/Al Nanocomposite Powder by Cold Spray

Influence of multiple electron-beam remeltings on the characteristics of HVOF and CGDS sprayed conicraly coatings

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