Preparation and oxidation behavior of NiCrAlYSi coating on a cobalt-base superalloy K40S

Zhang, K.; Wang, Q.M.; Sun, Chao; Wang, F.H.

doi:10.1016/j.corsci.2008.01.033

Cited by 43 publications

(20 citation statements)

References 13 publications

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“…In this work, a thin Cr-rich layer at the coating/substrate interface was observed only in the NiCrAlY coated specimens. Similar results were found in a MCrAlY coated Co-based superalloy [47]. Das et al [42] pointed out that no SRZ formed in the SC superalloys coated by Pt-Hf modified ␥-␥ coatings.…”

Section: Inter-diffusion Between the Coatings And The Sc Superalloy Ssupporting

confidence: 75%

“…The inward diffusion of Cr from the NiCrAlY coating into the substrate was remarkable, which resulted in the formation of Cr(Re,W) rich phase at the original coating/substrate interface. Such a phase might act as a diffusion barrier for inter-diffusion [47]. However, the lower density of TCP needles in SRZ of the NiCrAlY coated specimens than that in the NiAl coated ones most possibly owns to that the Al contents in the former is much lower.…”

Section: Inter-diffusion Between the Coatings And The Sc Superalloy Smentioning

confidence: 81%

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A magnetron sputtered microcrystalline β-NiAl coating for SC superalloys. Part I. Characterization and comparison of isothermal oxidation behavior at 1100°C with a NiCrAlY coating

Hou¹,

Zhu²,

Zhang³

et al. 2015

Applied Surface Science

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Section: Inter-diffusion Between the Coatings And The Sc Superalloy Ssupporting

confidence: 75%

Section: Inter-diffusion Between the Coatings And The Sc Superalloy Smentioning

confidence: 81%

A magnetron sputtered microcrystalline β-NiAl coating for SC superalloys. Part I. Characterization and comparison of isothermal oxidation behavior at 1100°C with a NiCrAlY coating

Hou¹,

Zhu²,

Zhang³

et al. 2015

Applied Surface Science

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“…Al is outwardly diffused to form the TGO scale; it is also inwardly diffused into the substrate. Owing to the nanostructured coating deposited by CAD [12,26], at the initial oxidation stage, Al is diffused rapidly to the substrate, leading to the phase transformation of γ-Ni to γ ′ -Ni 3 Al; so, the continuous layer γ ′ -Ni 3 Al phase could be formed at the interface of the coating/ substrate. The Cr element is a solid solution in the γ-Ni phase above 980°C.…”

Section: Oxidation Behaviourmentioning

confidence: 99%

Effect of substrate temperature on the oxidation behaviour of NiCrAlY coating

Khakzadian

Hosseini

Madar

2020

Surface Engineering

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NiCrAlY coating was deposited on the IN-738LC Ni-based superalloy by cathodic arc deposition at the substrate temperatures of 400°C and 700°C. The effects of the substrate temperature on the microstructure and the isothermal oxidation behaviour of the coatings were then investigated. SEM image and XRD analysis were used to characterize the deposited coatings. It was found that when the substrate temperature was raised from 400°C to 700°C, the degree of coating crystallinity was increased from 23% to 58%. After the 20-hr oxidation at 1000°C in air, the γ ′ -depletion layer was formed in the substrate. The growth rate constants of the γ ′ -depletion layer after the 100-hr oxidation were 1.3×10 −4 μm (s b ) −1 and 6.4×10 −5 μm (s b ) −1 for the deposited coatings at 400°C and 700°C, respectively. The results, therefore, indicated that with increasing the substrate temperature from 400°C to 700°C, the oxidation resistance was improved.

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“…Nanostructured MCrAlY coatings must be composed of a minimum of 2 wt-% of Al to form the alumina scale on the coating [12]. Owing to the chemical potential difference of the elements, the interdiffusion between the substrate and the coating occurs at high temperatures [13,14].…”

Section: Introductionmentioning

confidence: 99%

Cathodic arc deposition of NiCrAlY coating: oxidation behaviour and thermodynamic

Khakzadian

Hosseini

Madar

2019

Surface Engineering

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NiCrAlY coating was deposited on the Ni-base superalloy in the cathodic arc deposition process. The isothermal oxidation test was carried out at 1000°C in air. The cross-section of the coatings was studied by the field emission scanning microscope electron and energy dispersive spectroscopy. The formation and growth of the internal oxide were addressed during the high temperature oxidation. The outward diffusion of Ti occurred from the substrate to the coating, leading to the formation of TiO 2 beneath the thermally-grown oxide scale. Thermodynamic measurements of TiO 2 formation were performed and the role of the internal oxide in the formation of TiO 2 was determined.

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Preparation and oxidation behavior of NiCrAlYSi coating on a cobalt-base superalloy K40S

Cited by 43 publications

References 13 publications

A magnetron sputtered microcrystalline β-NiAl coating for SC superalloys. Part I. Characterization and comparison of isothermal oxidation behavior at 1100°C with a NiCrAlY coating

A magnetron sputtered microcrystalline β-NiAl coating for SC superalloys. Part I. Characterization and comparison of isothermal oxidation behavior at 1100°C with a NiCrAlY coating

Effect of substrate temperature on the oxidation behaviour of NiCrAlY coating

Cathodic arc deposition of NiCrAlY coating: oxidation behaviour and thermodynamic

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