Structure of the coating on a nickel alloy after chromoaluminizing in vacuum

Kolomytsev, P. T.; Abraimov, N. V.; Семенов, А. П.

doi:10.1007/bf00700944

Cited by 2 publications

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“…Very similar results, i.e., microstructure and the same intermetallic phases, are obtained and have been reported recently [2,17,27]. In microstructure of each sample, the intermetallic phases are probably: c-NiAl, c'-Ni 3 Al and aCr between them.…”

Section: Microstructuresupporting

confidence: 88%

Heat-Resisting Aluminized Coatings Modified by Chromium Addition Produced on Nickel-Based Alloys

Kotkowiak

Piasecki

Kotkowiak

et al. 2018

Trans Indian Inst Met

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Aluminizing process is an important technology in which aluminum is introduced into the surface of base material. In this work, aluminized layers were produced by the pack cementation process on Inconel 600, Inconel 625 and Nimonic 90 nickel-based alloys. Powder mixture contained 80% of Al and 20% of Fe-Cr. Microstructure, hardness, chemical composition and heat resistance were investigated. The microstructure consisted of intermetallic phases near the surface, and below them, the solid solution was observed. The oxidation resistance at elevated temperature of alloys with the layer was compared with pure alloys. After 20-h annealing at 1000°C, the phase analysis was carried out. On the Nimonic 90 with aluminized coatings, a lot of Cr 2 O 3 and Al 2 O 3 oxides were produced, whereas on the pure Nimonic 90, a lot of NiO oxides were observed. It was found that the best heat resistance was obtained for the layer produced on the Nimonic 90.

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Section: Microstructuresupporting

confidence: 88%

Heat-Resisting Aluminized Coatings Modified by Chromium Addition Produced on Nickel-Based Alloys

Kotkowiak

Piasecki

Kotkowiak

et al. 2018

Trans Indian Inst Met

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Chromium diffusion coatings

Castle¹,

Gabe

1999

International Materials Reviews

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pounds are formed within the diffusion layer, they may produce diffusion barriers or create brittle effects. Chromising has been practised as a highMost modern diffusion coatings are basically descendtemperature thermochemical diffusion coating process, primarily on steels but also on nickel and ants of traditional carburising and nitriding processes, cobalt based superalloys, for many years. The which have been used for at least 200 years, originally large accumulation of data in the literature relating as an art rather than a science. The origin of diffusion to both theory and industrial usage is reviewed.bonding can probably be found in ancient Egypt, Thermodynamic and kinetic approaches are relating to gold cladding on copper substrates. Conconsidered together with the coating thickness and sidering that metallic chromium became available structure required for high temperature protective only in 1789, all chromising operations are necessarily applications.IMR/311 more recent developments.

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Structure of the coating on a nickel alloy after chromoaluminizing in vacuum

Cited by 2 publications

References 0 publications

Heat-Resisting Aluminized Coatings Modified by Chromium Addition Produced on Nickel-Based Alloys

Heat-Resisting Aluminized Coatings Modified by Chromium Addition Produced on Nickel-Based Alloys

Chromium diffusion coatings

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