Role of platinum in aluminide coatings

H. M. Tawancy; N. M. Abbas; T. N. Rhys-Jones

doi:10.1016/0257-8972(91)90022-O

Role of platinum in aluminide coatings

H. M. Tawancy^*
, N. M. Abbas
, T. N. Rhys-Jones

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

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

123 Scopus citations

Abstract

An investigation has been carried out to determine the role of platinum in aluminide coatings on selected nickel-based superalloys. Various microscopy, spectroscopy and diffraction techniques were used to characterize the microstructure. It is found that platinum improves the protective nature of the coating by (1) increasing its diffusional stability, (2) eliminating chromium-rich precipitates from the outer coating layer and (3) preventing refractory transition elements such as molybdenum, vanadium and tungsten from diffusing into the outer coating layer. However, the oxidation behaviour of the coating varies from one alloy substrate to another depending upon its chemical composition and, in particular, the rare earth elements.

Original language	English
Pages (from-to)	1-7
Number of pages	7
Journal	Surface and Coatings Technology
Volume	49
Issue number	1-3
DOIs	https://doi.org/10.1016/0257-8972(91)90022-O
State	Published - 10 Dec 1991

Bibliographical note

Funding Information:
It is a pleasure to acknowledge the financial support of Rolls—Royce plc who also provided the coated alloys used in this study. Also, the support of the Research

ASJC Scopus subject areas

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

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abstract = "An investigation has been carried out to determine the role of platinum in aluminide coatings on selected nickel-based superalloys. Various microscopy, spectroscopy and diffraction techniques were used to characterize the microstructure. It is found that platinum improves the protective nature of the coating by (1) increasing its diffusional stability, (2) eliminating chromium-rich precipitates from the outer coating layer and (3) preventing refractory transition elements such as molybdenum, vanadium and tungsten from diffusing into the outer coating layer. However, the oxidation behaviour of the coating varies from one alloy substrate to another depending upon its chemical composition and, in particular, the rare earth elements.",

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AU - Tawancy, H. M.

AU - Abbas, N. M.

AU - Rhys-Jones, T. N.

N1 - Funding Information: It is a pleasure to acknowledge the financial support of Rolls—Royce plc who also provided the coated alloys used in this study. Also, the support of the Research

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Y1 - 1991/12/10

N2 - An investigation has been carried out to determine the role of platinum in aluminide coatings on selected nickel-based superalloys. Various microscopy, spectroscopy and diffraction techniques were used to characterize the microstructure. It is found that platinum improves the protective nature of the coating by (1) increasing its diffusional stability, (2) eliminating chromium-rich precipitates from the outer coating layer and (3) preventing refractory transition elements such as molybdenum, vanadium and tungsten from diffusing into the outer coating layer. However, the oxidation behaviour of the coating varies from one alloy substrate to another depending upon its chemical composition and, in particular, the rare earth elements.

AB - An investigation has been carried out to determine the role of platinum in aluminide coatings on selected nickel-based superalloys. Various microscopy, spectroscopy and diffraction techniques were used to characterize the microstructure. It is found that platinum improves the protective nature of the coating by (1) increasing its diffusional stability, (2) eliminating chromium-rich precipitates from the outer coating layer and (3) preventing refractory transition elements such as molybdenum, vanadium and tungsten from diffusing into the outer coating layer. However, the oxidation behaviour of the coating varies from one alloy substrate to another depending upon its chemical composition and, in particular, the rare earth elements.

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ER -

Role of platinum in aluminide coatings

Abstract

Bibliographical note

ASJC Scopus subject areas

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