Structure and cyclic oxidation resistance of Pt, Pt/Pd-modified and simple aluminide coatings on CMSX-4 superalloy

Radosław Swadzba; Marek Hetmańczyk; Maria Sozańska; Bartosz Witala; Lucjan Swadzba

doi:10.1016/j.surfcoat.2011.06.042

Structure and cyclic oxidation resistance of Pt, Pt/Pd-modified and simple aluminide coatings on CMSX-4 superalloy

Radosław Swadzba
, Marek Hetmańczyk
, Maria Sozańska
, Bartosz Witala
, Lucjan Swadzba

Silesian University of Technology

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

The coatings were prepared by the means of Pt and Pt/Pd galvanizing, followed by vapor phase aluminizing at 1050°C. Microstructural and phase analysis revealed that all the investigated coatings consisted mainly of β-NiAl phase, however the Pt-modified aluminide coating also contained PtAl₂ phase and pure platinum precipitates. The cross-sectional microstructure of the coatings was zonal and composed of β-NiAl phase zone and the diffusion zone. The Pt modified aluminide coating's cross-section also incorporated an outermost zone consisting of β-NiAl and PtAl₂ phases. The concentration profiles proved that both Pt and Pd contents decrease gradually inwards the modified coatings. Cyclic oxidation tests at 1100°C proved that Pt/Pd-modified aluminide coatings exhibit the best performance under cyclic conditions. The analysis of oxidation kinetics curves showed that the course of simple aluminide coating's oxidation is slightly different from that of Pt- and Pt/Pd-modified aluminide coatings.

Original language	English
Pages (from-to)	1538-1544
Number of pages	7
Journal	Surface and Coatings Technology
Volume	206
Issue number	7
DOIs	https://doi.org/10.1016/j.surfcoat.2011.06.042
Publication status	Published - 25 Dec 2011

Keywords

Aluminide coatings
Cyclic oxidation
Pt/Pd aluminide coatings
Superalloys

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.surfcoat.2011.06.042

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title = "Structure and cyclic oxidation resistance of Pt, Pt/Pd-modified and simple aluminide coatings on CMSX-4 superalloy",

abstract = "The coatings were prepared by the means of Pt and Pt/Pd galvanizing, followed by vapor phase aluminizing at 1050°C. Microstructural and phase analysis revealed that all the investigated coatings consisted mainly of β-NiAl phase, however the Pt-modified aluminide coating also contained PtAl2 phase and pure platinum precipitates. The cross-sectional microstructure of the coatings was zonal and composed of β-NiAl phase zone and the diffusion zone. The Pt modified aluminide coating's cross-section also incorporated an outermost zone consisting of β-NiAl and PtAl2 phases. The concentration profiles proved that both Pt and Pd contents decrease gradually inwards the modified coatings. Cyclic oxidation tests at 1100°C proved that Pt/Pd-modified aluminide coatings exhibit the best performance under cyclic conditions. The analysis of oxidation kinetics curves showed that the course of simple aluminide coating's oxidation is slightly different from that of Pt- and Pt/Pd-modified aluminide coatings.",

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author = "Rados{\l}aw Swadzba and Marek Hetma{\'n}czyk and Maria Soza{\'n}ska and Bartosz Witala and Lucjan Swadzba",

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AU - Swadzba, Radosław

AU - Hetmańczyk, Marek

AU - Sozańska, Maria

AU - Witala, Bartosz

AU - Swadzba, Lucjan

PY - 2011/12/25

Y1 - 2011/12/25

N2 - The coatings were prepared by the means of Pt and Pt/Pd galvanizing, followed by vapor phase aluminizing at 1050°C. Microstructural and phase analysis revealed that all the investigated coatings consisted mainly of β-NiAl phase, however the Pt-modified aluminide coating also contained PtAl2 phase and pure platinum precipitates. The cross-sectional microstructure of the coatings was zonal and composed of β-NiAl phase zone and the diffusion zone. The Pt modified aluminide coating's cross-section also incorporated an outermost zone consisting of β-NiAl and PtAl2 phases. The concentration profiles proved that both Pt and Pd contents decrease gradually inwards the modified coatings. Cyclic oxidation tests at 1100°C proved that Pt/Pd-modified aluminide coatings exhibit the best performance under cyclic conditions. The analysis of oxidation kinetics curves showed that the course of simple aluminide coating's oxidation is slightly different from that of Pt- and Pt/Pd-modified aluminide coatings.

AB - The coatings were prepared by the means of Pt and Pt/Pd galvanizing, followed by vapor phase aluminizing at 1050°C. Microstructural and phase analysis revealed that all the investigated coatings consisted mainly of β-NiAl phase, however the Pt-modified aluminide coating also contained PtAl2 phase and pure platinum precipitates. The cross-sectional microstructure of the coatings was zonal and composed of β-NiAl phase zone and the diffusion zone. The Pt modified aluminide coating's cross-section also incorporated an outermost zone consisting of β-NiAl and PtAl2 phases. The concentration profiles proved that both Pt and Pd contents decrease gradually inwards the modified coatings. Cyclic oxidation tests at 1100°C proved that Pt/Pd-modified aluminide coatings exhibit the best performance under cyclic conditions. The analysis of oxidation kinetics curves showed that the course of simple aluminide coating's oxidation is slightly different from that of Pt- and Pt/Pd-modified aluminide coatings.

KW - Aluminide coatings

KW - Cyclic oxidation

KW - Pt/Pd aluminide coatings

KW - Superalloys

UR - https://www.scopus.com/pages/publications/82755197947

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DO - 10.1016/j.surfcoat.2011.06.042

M3 - Article

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SN - 0257-8972

VL - 206

SP - 1538

EP - 1544

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

IS - 7

ER -

Structure and cyclic oxidation resistance of Pt, Pt/Pd-modified and simple aluminide coatings on CMSX-4 superalloy

Abstract

Keywords

ASJC Scopus subject areas

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