Aluminide Coating Prepared on Ni-Base Superalloy by Pack Cementation

Zhou, Feng; Gao, Ming; Tu, Gan Feng; Liu, Kui; Peng, Ke

doi:10.4028/www.scientific.net/amr.848.11

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…17,18 This technique is referred in several publications, in which most of them deal with aluminide coatings on steels and Ni base alloys for oxidation protection. [19][20][21] Few publications are reported to deal with the deposition of Al coatings on copper components by pack cementation method. Chiang et al formed Al coatings at 800 for 5 h deposition, 22 while Abd El-Azim et al formed Al coatings on Cu at 900uC for 1-6 h. 23 The deposition of Mg coatings by pack cementation is rarely reported, while most of them deal with different substrates.…”

Section: Introductionmentioning

confidence: 99%

Protection of Cu components with Mg and Al coatings deposited by pack cementation

Stathokostopoulos¹,

Chaliampalias²,

Pavlidou³

et al. 2014

Surface Engineering

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The growth of Mg and Al coatings on copper by pack cementation is examined in this work by investigating the mechanism of the process, the effect of temperature and heating time on the coating structure. The experiments were undertaken at temperatures ranging from 550 to 600uC, while the duration of the process varied from 30 min to 3 h. It was found that the magnesium coatings consist of two phases corresponding to MgCu 2 and CuMg 2 . These phases appeared as distinguished layers or mixed with each other, depending on the deposition temperature and duration. On the other hand, the aluminium coatings consist of a single Al 4 Cu 9 phase whose thickness increases with deposition time and temperature. Finally, the oxidation resistance was also evaluated by thermogravimetric measurements, which revealed that the coated samples have superior resistance to bare copper, while Al coated coupons had the best performance when exposed in high temperature environment.

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Section: Introductionmentioning

confidence: 99%

Protection of Cu components with Mg and Al coatings deposited by pack cementation

Stathokostopoulos¹,

Chaliampalias²,

Pavlidou³

et al. 2014

Surface Engineering

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“…As it can be seen in figure 4, in addition to NiAl and Ni 2 Al 3 known as major phases of the coating, there are some minor phases (i.e. Al 86 Cr 14 and Al 13 Fe 4 ) precipitated because of the diffusional reactions between the produced active Al atoms and the substrate elements (e.g., Cr, Fe) [50]. Figures 6(a) and (b) demonstrate the surface morphology of the synthesized aluminide coating, which was evaluated using SEM.…”

Section: Resultsmentioning

confidence: 99%

Microstructural and topographical characterization of the pack cemented aluminide coating applied on Inconel-600

Mahini¹,

Asl²,

Rabizadeh³

et al. 2021

Surf. Topogr.: Metrol. Prop.

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In this research, the pack cementation method was employed to apply a uniform aluminide coating on a substrate of nickel-based superalloy. The obtained intermetallic coating was synthesized using a pack containing 18Al–80Al2O3–2NH4Cl (wt.%) as the main deposition source, an inert filler, and an activator, respectively. The surface morphology and topography, cross-sectional microstructure, the elemental and phase composition, microhardness of the synthesized aluminide coating were studied using atomic force microscopy (AFM), optical microscopy (OM), scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), x-ray diffraction (XRD), and Vickers microhardness indenter as the characterization techniques. According to the 3D topography results, the average surface roughness of the Inconel-600 substrate was about 2.446 ± 0.239 nm compared to 43.558 ± 3.876 nm measured for the produced aluminide coating. Additionally, the synthesized coating consisted of NiAl and Ni2Al3 as major phases considering the XRD spectrum. It is also observed that the deposited aluminide coating had a three-layer structure including an outer layer, an inner layer, and a diffusion zone. The Vickers microhardness measurements indicated a significant increase in the microhardness of the substrate (from 185.6 ± 15.8 Hv to 1130.4 ± 42.5 Hv) after applying the aluminide coating. Moreover, the microstructural variations across the deposited aluminide coating led to different microhardness values obtained for each layer. The highest microhardness was observed in the coating diffusion zone, whereas the lowest value belonged to the outer layer.

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Thermal cycling and interface bonding performance of single phase (Ni,Pt)Al coating with and without pure metastable tetragonal phase 4YSZ

Xie

et al. 2023

Applied Surface Science

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Aluminide Coating Prepared on Ni-Base Superalloy by Pack Cementation

Cited by 3 publications

References 10 publications

Protection of Cu components with Mg and Al coatings deposited by pack cementation

Protection of Cu components with Mg and Al coatings deposited by pack cementation

Microstructural and topographical characterization of the pack cemented aluminide coating applied on Inconel-600

Thermal cycling and interface bonding performance of single phase (Ni,Pt)Al coating with and without pure metastable tetragonal phase 4YSZ

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