Chromoaluminizing of cooled blades of gas turbines by circulation method

Симонов, В. Н.; Abraimov, N. V.; Shkretov, Yu. P.; Lukina, V. V.; Терехин, А М

doi:10.1007/s11041-007-0066-x

Cited by 4 publications

(2 citation statements)

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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%

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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%

“…After oxidation, the chromoaluminized coating consists of Al 2 O 3 and Cr 2 O 3 phases on the surface. This process can be used to modify the materials as follows: steel [1,14], austenitic steel [15] or Ni-based alloys [16,17].…”

Section: Introductionmentioning

confidence: 99%