Parameter Studies on High-Velocity Oxy-Fuel Spraying of CoNiCrAlY Coatings Used in the Aeronautical Industry

Miramontes, José Ángel Cabral; Gaona-Tiburcio, C.; Almeraya-Calderón, Facundo; Estupiñán-López, Francisco; Pedraza-Basulto, G. K.; Poblano-Salas, C. A.

doi:10.1155/2014/703806

Cited by 42 publications

(24 citation statements)

References 7 publications

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“…the higher coating roughness after spraying in comparison to the roughness value of the ground surface of the reference sample. The obtained values of coefficient of friction for coatings after spraying are comparable to the values presented in the work of Cabral-Miramontes et al [20] measured for coatings of the MCrAlY type sprayed with the HVOF method at different process parameters (torch-substrate distance).…”

Section: Results Of Wear Resistance Testssupporting

confidence: 88%

Cavitation erosion and sliding wear resistance of HVOF coatings

Szala

Walczak

2018

Weld. Tech. Rev.

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The aim of the work was to investigate the resistance to cavitation erosion and sliding wear of sprayed HVOF coatings. M(Ni,Co)CrAlY and Cr3C2-NiCr based coatings were deposited using HVOF method onto stainless steel substrate grade AISI 304. As-sprayed coatings’ surface morphology was examined by SEM-EDS and profilometer methods. Cavitationerosion tests were conducted in distilled water with the use of vibratory rig and stationary specimen method. Cavitation erosion curves were plotted as well as cavitational wear mechanism was observed with the use of SEM microscope. Sliding wear tests were performed using the ball-on-disc tribotester with counter-specimen (ball) made of steel 100Cr6. Wearrates and coefficient of friction were computed. Normalized wear resistance with referenceto stainless steel reference sample AISI 304 was calculated. In addition, comparable analysis of wear resistance results was conducted. M(Ni,Co)CrAlY coating presented the highest cavitation erosion resistance, therefore Cr3C2-NiCr coating represented the highest sliding wear resistance of all tested materials.

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Section: Results Of Wear Resistance Testssupporting

confidence: 88%

Cavitation erosion and sliding wear resistance of HVOF coatings

Szala

Walczak

2018

Weld. Tech. Rev.

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“…This is in agreement with the data reported in the literature [14,19]. The hardness ranges from 4.7 to 5.8 GPa, which is comparable with the literature data [19,33]. Table 2.…”

Section: Coating Characterizationsupporting

confidence: 92%

Resistance to Cavitation Erosion and the Sliding Wear of MCrAlY and NiCrMo Metallic Coatings

Szala

Walczak

Łatka

et al. 2020

2nd Coatings and Interfaces Web Conference (CIWC-2 2020)

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Bulk cobalt- and nickel-based metallic materials exhibit superior resistance to cavitation erosion and sliding wear. Thus, thermally deposited High-Velocity Oxygen Fuel (HVOF) coatings seem promising for increasing the wear resistance of the bulk metal substrate. However, the effect of chemical composition on the cavitation erosion and sliding wear resistance of M(Co,Ni)CrAlY and NiCrMo coatings has not yet been exhaustively studied. In this study, High-Velocity Oxygen Fuel (HVOF) coatings such as CoNiCrAlY, NiCoCrAlY, and NiCrMoFeCo were deposited on AISI 310 (X15CrNi25-20) steel coupons. The microstructure, hardness, phase composition and surface morphology of the as-sprayed coatings were examined. Cavitation erosion tests were conducted using the vibratory method in accordance with the ASTM G32 standard. Sliding wear was examined with the use of a ball-on-disc tribometer, and friction coefficients were measured. The mechanism of wear was identified with the scanning electron microscope equipped with an energy dispersive spectroscopy (SEM-EDS) method. In comparison to the NiCrMoFeCo coating, the CoNiCrAlY and NiCoCrAlY coatings have a lower sliding and cavitation wear resistance.

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“…Pure MCrAlYs, however, are unsuitable for tribological applications, because their low hardness would result in very severe wear under sliding contact conditions, particularly during running-in stages at low temperatures. Literature studies on this topic have indeed reported significant wear by adhesion and delamination mechanisms under rotating and oscillating sliding [8][9][10].…”

Section: Introductionmentioning

confidence: 94%

Tribology of NiCrAlY+Al2O3 composite coatings by plasma spraying with hybrid feeding of dry powder+suspension

Bolelli

Candeli

Lusvarghi

et al. 2015

Wear

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NiCrAlY layers containing different amounts of Al2O3 (0, 3, 6, 12, 18 wt.%) were deposited onto stainless steel substrates by a “hybrid” plasma spray process whereby the NiCrAlY powder was fed in dry form whilst fine Al2O3 powder, dispersed in ethanol, was injected through a suspension feeding system.\ud The Al2O3 reinforcement, consisting of fine, rounded particles interspersed within larger NiCrAlY lamellae, only causes marginal changes in hardness, due to the limited particles-matrix cohesion. Nonetheless, at room temperature, ball-on-disk dry sliding wear rates against sintered Al2O3 counterparts decrease from ≈5⁎10−4 mm3/(Nm) for pure NiCrAlY to ≈5⁎10−6 mm3/(Nm) with 18 wt.% Al2O3 addition. Pure NiCrAlY indeed suffers adhesive wear, whereas, on the composite coatings, the pull-out of some Al2O3 particles triggers the formation of a tribo-layer of smeared oxide fragments, which mediates the contact with the counterbody.\ud At 400 °C and at 700 °C, all wear rates are levelled to ≈8⁎10−5 mm3/(Nm) and ≈2⁎10−5 mm3/(Nm), respectively. An oxide layer grows on the NiCrAlY matrix upon high-temperature exposure, resulting in a tribo-oxidation wear mechanism, which makes the addition of Al2O3 irrelevant. At 700 °C, coatings are further strengthened by partial healing of interlamellar defects and by fine-grained β-NiAl precipitating within the metal matrix

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Parameter Studies on High-Velocity Oxy-Fuel Spraying of CoNiCrAlY Coatings Used in the Aeronautical Industry

Cited by 42 publications

References 7 publications

Cavitation erosion and sliding wear resistance of HVOF coatings

Cavitation erosion and sliding wear resistance of HVOF coatings

Resistance to Cavitation Erosion and the Sliding Wear of MCrAlY and NiCrMo Metallic Coatings

Tribology of NiCrAlY+Al2O3 composite coatings by plasma spraying with hybrid feeding of dry powder+suspension

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