Microstructure and oxidation performance of undoped and rhodium-doped aluminide coatings on Mar-M247 superalloy: Fid-Bau Portal

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Microstructure and oxidation performance of undoped and rhodium-doped aluminide coatings on Mar-M247 superalloy

Zagula-Yavorska, Maryana

A rhodium modification of aluminide coating on Mar-M247 superalloy was performed by electrodepositing of 0.5 µm thick rhodium layer followed by chemical vapour aluminizing. It was found that rhodium dissolves in the aluminide coating. Oxidation resistance of undoped coating is worse than the rhodium-doped one (higher weight gain). The constant k_p value confirms the favourable modification effect of rhodium on resistance against oxidation of aluminide coatings. Rhodium reduces the oxide growth rate three times. Moreover, it dissolves in the NiAl rather than in the γ′-Ni₃Al during oxidation. The degradation rate from NiAl to γ′-Ni₃Al and Al₂O₃ layer growth has decreased.

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Microstructure and oxidation performance of undoped and rhodium-doped aluminide coatings on Mar-M247 superalloy

Zagula-Yavorska, Maryana

A rhodium modification of aluminide coating on Mar-M247 superalloy was performed by electrodepositing of 0.5 µm thick rhodium layer followed by chemical vapour aluminizing. It was found that rhodium dissolves in the aluminide coating. Oxidation resistance of undoped coating is worse than the rhodium-doped one (higher weight gain). The constant k_p value confirms the favourable modification effect of rhodium on resistance against oxidation of aluminide coatings. Rhodium reduces the oxide growth rate three times. Moreover, it dissolves in the NiAl rather than in the γ′-Ni₃Al during oxidation. The degradation rate from NiAl to γ′-Ni₃Al and Al₂O₃ layer growth has decreased.

Microstructure and oxidation performance of undoped and rhodium-doped aluminide coatings on Mar-M247 superalloy

Zagula-Yavorska, Maryana

A rhodium modification of aluminide coating on Mar-M247 superalloy was performed by electrodepositing of 0.5 µm thick rhodium layer followed by chemical vapour aluminizing. It was found that rhodium dissolves in the aluminide coating. Oxidation resistance of undoped coating is worse than the rhodium-doped one (higher weight gain). The constant k_p value confirms the favourable modification effect of rhodium on resistance against oxidation of aluminide coatings. Rhodium reduces the oxide growth rate three times. Moreover, it dissolves in the NiAl rather than in the γ′-Ni₃Al during oxidation. The degradation rate from NiAl to γ′-Ni₃Al and Al₂O₃ layer growth has decreased.

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Titel:

Microstructure and oxidation performance of undoped and rhodium-doped aluminide coatings on Mar-M247 superalloy

Weitere Titelangaben:

Archiv.Civ.Mech.Eng

Beteiligte:

Zagula-Yavorska, Maryana (Autor:in)

Erschienen in:

Archives of Civil and Mechanical Engineering ; 19 ; 832-841

Erscheinungsdatum:

01.09.2019

Format / Umfang:

10 pages

ISSN:

DOI:

https://doi.org/10.1016/j.acme.2019.04.001

Medientyp:

Aufsatz (Zeitschrift)

Format:

Elektronische Ressource

Sprache:

Englisch

Schlagwörter:

Oxidation performance , Rhodium modification , Chemical vapour aluminizing , Weight gain , Constant k<sub>p</sub> value Chemical Sciences , Physical Chemistry (incl. Structural) , Engineering , Materials Engineering , Civil Engineering , Mechanical Engineering , Structural Materials

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