Mechanical and metallurgical properties of plasma sprayed and laser remelted Ni–20Cr and Stellite-6 coatings

Sidhu, Buta Singh; Puri, D.; Prakash, S.

doi:10.1016/j.jmatprotec.2004.05.023

Cited by 99 publications

(40 citation statements)

References 26 publications

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“…After bond coating, a final coating of approximately 200 mm thick was applied using the process conditions reported in Table 4. The coatings were characterized with regard to porosity, microstructure, microhardness, elemental distribution etc., and these results reported elsewhere [22,23].…”

Section: Plasma Sprayingsupporting

confidence: 90%

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Analytical Studies on the Behavior of Nickel- and Cobalt-Base Shrouded Plasma Spray Coatings at Elevated Temperature in Air

Sidhu

Prakash

2007

Oxid Met

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Nickel-and Cobalt-base coatings were developed on boiler-tube steels by the argon-shrouded, plasma spray process. The cyclic behavior of bare and coated boiler-tube steels has been studied in air at 900 8C. Four types of coatings were used: Ni-22Cr-10Al-1Y (NiCrAlY), Ni-20Cr, Ni 3 Al and Stellite-6 (St-6). The NiCrAlY has also been used as a bond coat of approximately 150 mm thick before the final coating in all the cases. Oxidation products analyzed in the scale are mostly oxides of the elements present in the coatings and substrate steels. NiCr 2 O 4 and CoCr 2 O 4 spinels are the most-common observed phases in the scale for nickel-and cobalt-base coatings. The internal oxidation of coatings and diffusion of iron from the base steel to the upper scale occurred during the study. Cracks formed in the scale and coating and may be due to differences in composition of coatings, bond coat, substrate and oxides formed.

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Section: Plasma Sprayingsupporting

confidence: 90%

“…Sidhu et al [22,23] have characterized plasma-spray coatings of NiCrAlY, Ni 3 Al, Ni-20Cr and Stellite-6 coatings on boiler-tube steels in order to provide some data base regarding their engineering applications. The coatings have low porosity and good microhardness values.…”

Section: Coating Alloy/powdersmentioning

confidence: 99%

Analytical Studies on the Behavior of Nickel- and Cobalt-Base Shrouded Plasma Spray Coatings at Elevated Temperature in Air

Sidhu

Prakash

2007

Oxid Met

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“…5 The coatings were characterized before oxidation studies and the detailed results have been published elsewhere. 6,7 …”

Section: Formulation Of Coatingsmentioning

confidence: 99%

High-Temperature Oxidation Behavior of NiCrA1Y Bond Coats and Stellite-6 Plasma-Sprayed Coatings

Sidhu

Prakash

2005

Oxid Met

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a shrouded plasma-spray process. The NiCrA1Y alloy powder was also sprayed as a bond coat before applying a Stellite-6 coating. The cyclic-oxidation behavior of the NiCrA1Y bond coats and Stellite-6 coating were evaluated at 900 • C. Visual observations and gravimetric data were measured at the end of each cycle. Finally, the scale was analyzed using X-ray Diffraction, Scanning-Electron Microscope, Energy-Dispersive X-Ray Studies and Electron-Probe Micro-Analyzer techniques. The coatings were found to be effective in increasing resistance to oxidation at the test temperature of 900 • C. The protection is higher in the case of the Stellite-6 coating. The protection is lesser for both coating types when T22 steel was the substrate and higher in the case of GrA1 steel. The deleterious behavior of Mo present in the T22 steel is perhaps responsible for conferring lesser protection.

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“…The technique can create a variety of coatings such as metal coatings, ceramic coatings and metallic ceramic coatings [1]. Plasma coatings are mainly used in erosive, corrosive and high temperature environments [2 -5].…”

Section: Introductionmentioning

confidence: 99%

STUDY ON CORROSION RESISTANCE OF CARBON NANOTUBES REINFORCED Al2O3 COATING

Tuấn¹

2018

JST

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This paper presents our research on the reinforcement with 1 % of carbon nanotubes (CNT) for a ceramic Al 2 O 3 coating applied by air plasma spray (APS) on CT3 steel. The corrosion resistances of both CNTs reinforced and non-CNTs reinforced Al 2 O 3 coatings were investigated by using different such techniques as: potentiodynamic polarization; electrochemical impedance spectroscopy (EIS); salt spray and erosion corrosion tests.The obtained results show positive effects of CNT to improve the corrosion protection of the Al 2 O 3 coating: time of appearance of first rust points on the surface in the salt spray test increased from 2 hours for pure Al 2 O 3 coating to 24 hours for the CNTs-Al 2 O 3 one; the erosioncorrosion resistance of the CNTs-Al 2 O 3 coating increased about 17 % in comparison with the one of the Al 2 O 3 coating.

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Mechanical and metallurgical properties of plasma sprayed and laser remelted Ni–20Cr and Stellite-6 coatings

Cited by 99 publications

References 26 publications

Analytical Studies on the Behavior of Nickel- and Cobalt-Base Shrouded Plasma Spray Coatings at Elevated Temperature in Air

Analytical Studies on the Behavior of Nickel- and Cobalt-Base Shrouded Plasma Spray Coatings at Elevated Temperature in Air

High-Temperature Oxidation Behavior of NiCrA1Y Bond Coats and Stellite-6 Plasma-Sprayed Coatings

STUDY ON CORROSION RESISTANCE OF CARBON NANOTUBES REINFORCED Al2O3 COATING

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