The effect of the substrate temperature on the microstructure properties of the NiCrAl coating in cathodic arc deposition

Khakzadian, J.; Hosseini, Seyed Hossein; Madar, Karim Zangeneh

doi:10.1016/j.surfcoat.2018.01.001

Cited by 13 publications

(8 citation statements)

References 26 publications

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“…The amount of the internal oxide was estimated by an image processing method [7,24] for the 5 and 60 h oxidation; it was 2.7 and 2.9%, respectively. The cross-section of the coatings before and after image processing is shown in Figure 5.…”

Section: Resultsmentioning

confidence: 99%

“…For example, the activity of the elements in the Ni-20Cr-11Al alloy at 900-1100°C is shown in Figure 2. In Figure 3, the standard Gibbs free energy change (ΔG°) per 1 mol O 2 , for the oxides The amount of the internal oxide was estimated by an image processing method [7,24] for the 5 and 60 h oxidation; it was 2.7 and 2.9%, respectively. The cross-section of the coatings before and after image processing is shown in Figure 5.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cathodic arc deposition of NiCrAlY coating: oxidation behaviour and thermodynamic

Khakzadian

Hosseini

Madar

2019

Surface Engineering

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“…Cr and Al in NiCrAl alloys are beneficial to form a protective oxide film containing Cr 2 O 3 and Al 2 O 3 under high temperature oxidation condition, but Cr 2 O 3 is a highly volatile oxide [1,2] . Besides, the addition of Cr in NiAl binary alloys can lower the concentration of Al required to form an Al 2 O 3 oxide film, which is a typical third‐element effect (TEE) [3–5] . The third‐element effect lays a theoretical foundation for the development of new high temperature oxidation resistant alloys or coatings.…”

Section: Introductionmentioning

confidence: 99%

“…[1,2] Besides, the addition of Cr in NiAl binary alloys can lower the concentration of Al required to form an Al 2 O 3 oxide film, which is a typical thirdelement effect (TEE). [3][4][5] The third-element effect lays a theoretical foundation for the development of new high temperature oxidation resistant alloys or coatings. A lot of researches have been conducted on the oxidation behavior of NiCrAl-based alloys or coatings.…”

Section: Introductionmentioning

confidence: 99%

Oxidation Behavior and Interfacial Bonding Properties of NiCrAl Alloys

Song

et al. 2022

ChemistrySelect

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The oxidation behavior and oxidation kinetics of NiCrAl alloy were studied by XRD, SEM and the thermogravimetric analysis method. The adhesion strength of the films was characterized by micron scratch tester. The results show that the oxide film has not formed at 600 °C and 700 °C, and an oxide layer of Al2O3 has formed at 800 °C. Moreover, an oxide layer composed of Cr2O3 and Al2O3 has formed at 900 °C. After oxidation at 800 °C for 100 h, partial θ‐Al2O3 has transformed to steady‐state α‐Al2O3 and a dense oxide film of Al2O3 with the thickness of about 620 nm has formed on the surface of the NiCrAl alloy. The oxidation kinetics curve of the alloy obeys the parabolic law and there are two oxidation rate constants in the oxidation process. The oxidation rate constant of 1.58×10−4 mg2⋅cm−4⋅h−1 in the early oxidation period (0∼12 h) and the oxidation rate constant of 1.04×10−4 mg2⋅cm−4⋅h−1 in the late oxidation period (12∼100 h) indicate that the oxidation resistance ability of the alloy increases with the extension of oxidation time. With the increase of the oxidation time, the interface bonding strength between the oxide film and the substrate can be improved and reaches 5.21 N at 800 °C for 100 h.

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“…At higher substrate temperatures, due to the bulk diffusion and recrystallization, dense films are formed. An earlier work [23] has shown the effect of the substrate temperature on the NiCrAl coating microstructure in the CAD process. The IN-738 LC Ni-based superalloy is desirable for industrial gas turbine and aircraft engine applications.…”

Section: Introductionmentioning

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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The effect of the substrate temperature on the microstructure properties of the NiCrAl coating in cathodic arc deposition

Cited by 13 publications

References 26 publications

Cathodic arc deposition of NiCrAlY coating: oxidation behaviour and thermodynamic

Cathodic arc deposition of NiCrAlY coating: oxidation behaviour and thermodynamic

Oxidation Behavior and Interfacial Bonding Properties of NiCrAl Alloys

Effect of substrate temperature on the oxidation behaviour of NiCrAlY coating

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