MCrAlY coatings deposited by cathodic vacuum arc evaporation

Vetter, J.; Knotek, O.; Brand, J.; Beele, W.

doi:10.1016/0257-8972(94)90133-3

Cited by 31 publications

(4 citation statements)

References 4 publications

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“…PVD techniques can be used to deposit MCrAlY coatings; these include electron beam (EB-PVD) [4,5], magnetron sputtering (MS) [6] and cathodic arc deposition (CAD) [7,8]. In the CAD process, the difference between the chemical composition of the target and the coating is negligible; therefore, the alloys can be easily deposited [9,10]. Also, in this process, a high deposition rate is achievable [11].…”

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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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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“…But the reports about the application of MCrAlY to improve the microhardness and wear-resistance of titanium alloys are limited. Recently, arc ion plating (AIP) shows many advantages in the preparation of MCrAlY coatings due to the ion bombardment of the substrate during deposition, which can improve both the adhesion and the structure of the coating [16].…”

Section: Introductionmentioning

confidence: 99%

Comparison of molybdenizing and NiCrAlY coating on Ti and Ti-6Al-4V

et al. 2009

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Two surface treatments, molybdenizing and depositing NiCrAlY coating, were applied to improve the microhardness and the oxidation resistance of titanium and Ti-6Al-4V. Coupons were analyzed using optical microscopy (OM), scanning electron microscopy (SEM) with X-ray energy dispersive spectrometer (EDS), and X-ray diffraction (XRD). Vickers hardness and isothermal oxidation tests were carried out to evaluate the effects of these two surface treatments on the microhardness and oxidation resistance of the substrates. The post vacuum heat treatment of the NiCrAlY coating and the molybdenizing parameters were also discussed. It is found that molybdenizing can obviously increase the surface hardness of titanium due to the formation of β, α″, and α′ phases in the diffusion layer. As γ′ phase is formed after vacuum heat treatment, the NiCrAlY coating is effective in improving the surface hardness of Ti-6Al-4V. The NiCrAlY coating can obviously decrease the oxidation rate of Ti-6Al-4V at 700-900°C, which can be attributed to the formation of Al 2 O 3 and Cr 2 O 3 mixed scale during the oxidation.

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“…This consistent arcing in the same location leads to the formation of craters on the cathode surface, resulting in an unstable arcing behaviour and uneven cathode evaporation. It has also been observed that the arc will preferentially travel along grain boundaries, also resulting in unstable arc behaviour [80]. Similar premature cathode degradation was noted by Knotek et al [79] in a high-chromium MCrAlY cathode after 20 hours of evaporation, where the cathode erosion behaviour was attributed to the hot isostatic pressing (HIP) treatment used in the manufacture of these cathodes.…”

Section: Cathodic Arc Pvdmentioning

confidence: 66%

“…Unstable arc travel and macroparticle ejection can be attributed to a relatively non-homogeneous cathode composition resulting in preferential and explosive evaporation of the lower melting point constituents (such as aluminum of FeCrAlY) in the cathode material, leading to macroparticle formation. It has been shown that inhomogeneities such as pores and poorly distributed cathode alloy phases can lead to consistent arcing of a particular location [80]. This consistent arcing in the same location leads to the formation of craters on the cathode surface, resulting in an unstable arcing behaviour and uneven cathode evaporation.…”

Section: Cathodic Arc Pvdmentioning

confidence: 99%

Study of bond coating pre-oxidation heat treatments for high temperature thin film sensors in gas turbine engine applications

Puetz¹

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The author has granted a nonexclusive license allowing Library and Archives Canada to reproduce, publish, archive, preserve, conserve, communicate to the public by telecommunication or on the Internet, loan, distribute and sell theses worldwide, for commercial or noncommercial purposes, in microform, paper, electronic and/or any other formats.L'auteur a accorde une licence non exclusive permettant a la Bibliotheque et Archives Canada de reproduire, publier, archiver, sauvegarder, conserver, transmettre au public par telecommunication ou par I'lnternet, preter, distribuer et vendre des theses partout dans le monde, a des fins commerciales ou autres, sur support microforme, papier, electronique et/ou autres formats.

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MCrAlY coatings deposited by cathodic vacuum arc evaporation

Cited by 31 publications

References 4 publications

Effect of substrate temperature on the oxidation behaviour of NiCrAlY coating

Effect of substrate temperature on the oxidation behaviour of NiCrAlY coating

Comparison of molybdenizing and NiCrAlY coating on Ti and Ti-6Al-4V

Study of bond coating pre-oxidation heat treatments for high temperature thin film sensors in gas turbine engine applications

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