A Comparative Study of High Velocity Oxygen Fuel, Vacuum Plasma Spray, and Axial Plasma Spray for the Deposition of CoNiCrAlY Bond Coat Alloy

High velocity oxygen-fuel (HVOF) spraying system in open air has been established for producing the coatings that are extremely clean and dense. It is thought that the HVOF sprayed MCrAlY (M is Fe, Ni and/or Co) coatings can be applied to provide resistance against oxidation and corrosion to the hot parts of gas turbines. Also, it is well known that the thicker coatings can be sprayed in comparison with any other thermal spraying systems due to improved residual stresses. However, thermal and mechanical properties of HVOF coatings have not been clarified. Especially, the characteristics of residual stress, that are the most important property from the view point of production technique, have not been made clear. In this paper, the mechanical properties of HVOF sprayed MCrAlY coatings were measured in both the case of as-sprayed and heat-treated coatings in comparison with a vacuum plasma sprayed MCrAlY coatings. It was confirmed that the mechanical properties of HVOF sprayed MCrAlY coatings could be improved by a diffusion heat treatment to equate the vacuum plasma sprayed MCrAlY coatings. Also, the residual stress characteristics were analyzed using a deflection measurement technique and a X-ray technique. The residual stress of HVOF coating was reduced by the shot-peening effect comparable to that of a plasma spray system in open air. This phenomena could be explained by the reason that the HVOF sprayed MCrAlY coating was built up by poorly melted particles. [S0742-4795(00)00701-8]

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Isothermal oxidation resistance comparison between air plasma sprayed, vacuum plasma sprayed and high velocity oxygen fuel sprayed CoNiCrAlY bond coats

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2010.01.031 ◽

2010 ◽

Vol 204 (15) ◽

pp. 2499-2503 ◽

Cited By ~ 54

Author(s):

Martina Di Ferdinando ◽

Alessio Fossati ◽

Alessandro Lavacchi ◽

Ugo Bardi ◽

Francesca Borgioli ◽

...

Keyword(s):

Oxidation Resistance ◽

High Velocity ◽

Isothermal Oxidation ◽

High Velocity Oxygen Fuel ◽

Air Plasma ◽

Bond Coats ◽

Vacuum Plasma ◽

Plasma Sprayed ◽

Oxygen Fuel

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A comparison of the antifouling performance of air plasma spray (APS) ceramic and high velocity oxygen fuel (HVOF) coatings for use in marine hydraulic applications

Biofouling ◽

10.1080/08927014.2018.1465052 ◽

2018 ◽

Vol 34 (5) ◽

pp. 479-491 ◽

Cited By ~ 2

Author(s):

Richard Piola ◽

Andrew S. M. Ang ◽

Matthew Leigh ◽

Scott A. Wade

Keyword(s):

Plasma Spray ◽

High Velocity ◽

High Velocity Oxygen Fuel ◽

Air Plasma Spray ◽

Air Plasma ◽

Hvof Coatings ◽

Oxygen Fuel

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Comparative study on the corrosion and wear behavior of plasma-sprayed vs. high velocity oxygen fuel-sprayed Al8Si20BN ceramic coatings

Ceramics International ◽

10.1016/j.ceramint.2018.03.275 ◽

2018 ◽

Vol 44 (11) ◽

pp. 12180-12193 ◽

Cited By ~ 7

Author(s):

Mitra Akhtari Zavareh ◽

Ehsan Doustmohammadi ◽

Ahmed A.D.M Sarhan ◽

Ramin Karimzadeh ◽

Pooria Moozarm Nia ◽

...

Keyword(s):

Comparative Study ◽

High Velocity ◽

Wear Behavior ◽

Ceramic Coatings ◽

Corrosion And Wear ◽

High Velocity Oxygen Fuel ◽

Plasma Sprayed ◽

Oxygen Fuel

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CHARACTERIZATION AND ELECTROCHEMICAL CORROSION ANALYSIS OF HEAT-TREATED REINFORCED HA COATINGS DEPOSITED BY VACUUM PLASMA SPRAY TECHNIQUE

Surface Review and Letters ◽

10.1142/s0218625x21410031 ◽

2021 ◽

pp. 2141003

Author(s):

AMARDEEP SINGH KANG ◽

GURBHINDER SINGH ◽

VIKAS CHAWLA ◽

CHANDER PRAKASH ◽

RAMANUJAM RADHAKRISHNAN ◽

...

Keyword(s):

Plasma Spray ◽

Bond Coat ◽

Surface Hardness ◽

Electrochemical Corrosion ◽

Vacuum Plasma Spray ◽

Corrosion Performance ◽

Vacuum Plasma ◽

Heat Treated ◽

Coating Characteristics ◽

The Impact

Herein, a biomimetic coating of hydroxyapatite (HA)–Al2O3 and HA–ZrO2 was deposited on Ti–6Al–4V-alloy using vacuum plasma spray (VPS) technique. The bond-coat of ZrO2 has been introduced between the substrate and reinforced HA coatings to study the effect of bond-coat on structural, mechanical properties and electrochemical corrosion performance of the developed coatings. In addition, the impact of thermal treatment of coating was investigated on these properties too. Coating characteristics, such as morphology, porosity, surface roughness, and crystallinity were investigated. The corrosion performance of coatings was tested in Hank’s-based salt solution (HBSS). Significant enhancement in crystallinity and surface-hardness has been witnessed after heat treatment; nevertheless, porosity reduced. The electrochemical corrosion study revealed that the corrosion resistance of heat-treated samples was better than the as-sprayed coatings samples. The intensity of XRD peaks of all coatings increased after 24[Formula: see text]h immersion in HBSS for the electrochemical test in comparison to the intensity of peaks before the corrosion test.

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