Effects of deposition temperature on the kinetics growth and protective properties of aluminide coatings

Xu, Zhenhua; Wang, Zhankao; Niu, Jing; He, Limin; Mu, Rende; Wang, Kai

doi:10.1016/j.jallcom.2015.01.183

Cited by 17 publications

(4 citation statements)

References 19 publications

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“…XRD contrasting patterns in Figure 3 showed that the carburized DD10 superalloy with an HY5 coating had the same phases as the uncarburized DD10 superalloy with an HY5 coating after a 300 h thermal cyclic oxidation time, which consisted of β-NiAl, α-Al 2 O 3 , and α-Cr. These phases were proved to be a favorable condition to form a cubic-structure β-NiAl phase [ 20 ].…”

Section: Resultsmentioning

confidence: 99%

The Interdiffusion Behavior of NiCoCrAlYHf Coating Deposited by Arc Ion Plating on Carburized Ni-Based Single Crystal Superalloy

et al. 2021

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In the present study, arc ion plating (AIP) was used to prepare a NiCoCrAlYHf coating (HY5 coating) on a carburized third-generation single-crystal superalloy DD10. The interdiffusion behavior of the carburized superalloy with an HY5 coating was investigated for a 1000 h oxidation time at 1100 °C. Carburization enhanced the interfacial bonding force and improved the microstructure of the NiCoCrAlYHf coating. An interdiffusion zone (IDZ) formed after a 300 h oxidation time, and the formation of a carburized layer effectively suppressed an inward diffusion of cobalt, aluminium, and chromium to the DD10 superalloy as well as an outward diffusion of nickel and refractory elements for instance rhenium and tungsten to the HY5 coating that occurred in static air at 1100 °C. The roles of the carburized layer in affecting thermal cyclic oxidation and element interdiffusion were studied. Subsequently, a modified form of the Boltzmann–Matano analysis was used to present the interdiffusion coefficients of aluminium.

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Section: Resultsmentioning

confidence: 99%

The Interdiffusion Behavior of NiCoCrAlYHf Coating Deposited by Arc Ion Plating on Carburized Ni-Based Single Crystal Superalloy

et al. 2021

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“…microstructure are critical factors in this method which needs optimization. Because, it has been reported in vapor phase CVD method that the coating quality depends on the processing factors [3].…”

Section: Effect Of Temperature and Time On Nickel Aluminide Coating Dmentioning

confidence: 99%

Effect of Temperature and Time on Nickel Aluminide Coating Deposition

Chandio

Abro

2018

Mehran Univ. res. j. eng. technol.

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The βNiAl coating was deposited onto Nickel based CMSX-4 superalloy by in-situ CVD (Chemical Vapor Deposition) method. Main focus of this contribution was to study the influence of aluminizing time and temperature on the microstructure and thickness of the coating; this was followed by examination by XRD (X-Ray Diffraction), electron microscope. Results suggest that an incremental variation in temperature alters the coating activities from HA (High Activity) to LA (Low Activity). This is exhibited by the resultant CT (Coating Thickness) since HA coatings are thicker than LA counterparts. The microstructure of the coating formed at low temperature (or HA ones) showed a large amount of α-Cr precipitates while one formed at high temperature (or LA ones) exhibited lower amounts of such precipitates. Moreover, incremental aluminizing time showed linear trend of CT at initial stage, thereafter (10 hrs) it leveled off. Whereas it does not affect microstructure of the coating

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“…High-temperature oxidation and corrosion inevitably occur in the aggressive environment of gas turbine engines which are applied in aircraft, aerospace, navy, gas and oil industries and power generation units. Nickel-based superalloys due to their excellent mechanical strength and creep resistance at high temperatures are widely used in the critical hot section of gas turbines such as combustion chambers, turbine stators, and rotors [1,2]. However, Nickel-based superalloys are not able to provide significant resistance against high-temperature oxidation and hot corrosion during long-time exposure.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Cyclic Oxidation Resistance of Ce-Si Modified Aluminide Coating Deposited by Pack Cementation on Inconel 738LC

Nourpoor¹,

Javadian²,

Rouhaghdam³

et al. 2022

Preprint

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The synergistic effect of silicon and cerium addition on the oxidation resistance of pack cementation aluminide coating applied on Ni-based superalloy substrate was investigated. The effect of cerium and silicon on the scale morphology, oxidation behavior, and scale spallation tendency are discussed based on the experimental results, using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray analyses (EDX). In addition, the oxidation resistance was evaluated by measuring the weight of samples after each 16-hour cycle at 1100˚C for 50 cycles. The experiments indicated that silicon addition to aluminide coating improves the oxidation resistance through the formation of β-NiAl1-nSin and δ-Ni2Al3-nSin and δ-Ni2Si phases. Furthermore, the addition of 1% cerium to modified aluminide enhances the formation of the fine-grained microstructure of the β-NiAl and δ-Ni2Al3 and reduces the outward/inward diffusion of elements (so-called blocking effect) which significantly modifies the hot oxidation resistance. The addition of 2% cerium, owing to the distortion of the β-NiAl and δ-Ni2Al3 phases, strictly decreases the hot oxidation resistance and the coating is exfoliated after 450 h at 1100 °C. The cyclic oxidation tests showed that the samples containing 1% cerium and 6% silicon possess the highest hot oxidation resistance in which 2 mg/cm2 weight loss of Ce-Si-aluminide was reported after 800 h. This is attributed to the simultaneous effect of cerium and silicon during the deposition process which reduces the oxygen diffusion and reduces the growth rate of α-Al2O3 during oxidation tests. The α-Al2O3 oxidation layer morphology showed that finer grains are formed in samples containing optimum ratios of cerium and silicon which indicates that these elements improve the coating adhesion and oxidation resistance simultaneously.

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Effects of deposition temperature on the kinetics growth and protective properties of aluminide coatings

Cited by 17 publications

References 19 publications

The Interdiffusion Behavior of NiCoCrAlYHf Coating Deposited by Arc Ion Plating on Carburized Ni-Based Single Crystal Superalloy

The Interdiffusion Behavior of NiCoCrAlYHf Coating Deposited by Arc Ion Plating on Carburized Ni-Based Single Crystal Superalloy

Effect of Temperature and Time on Nickel Aluminide Coating Deposition

Microstructure and Cyclic Oxidation Resistance of Ce-Si Modified Aluminide Coating Deposited by Pack Cementation on Inconel 738LC

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