Enhancing the Oxidation Properties of Gamma Prime + Gamma Platinum Bond Coat by Rhenium and Yttrium Additions for Improved Adhesion of Thermal Barrier Coatings on Nickel-Base Superalloys

H. M. Tawancy

doi:10.1007/s11085-015-9566-z

Enhancing the Oxidation Properties of Gamma Prime + Gamma Platinum Bond Coat by Rhenium and Yttrium Additions for Improved Adhesion of Thermal Barrier Coatings on Nickel-Base Superalloys

H. M. Tawancy^*

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

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

8 Scopus citations

Abstract

A Re- and Y-modified γ′ + γ Pt bond coat was synthesized by diffusing 25 μm layer of Ni-6 wt%Re–0.5 wt%Y alloy and 5 μm layer of Pt into a Ni-based superalloy. It was observed that the modified bond coat can extend the useful life of thermal barrier coating systems with yttria-stabilized zirconia as top coat by more than double relative to the conventional bond coat synthesized by diffusing 8 μm layer of Pt into the same superalloy. The superior performance of the modified bond coat is explained in terms of the combined beneficial effects of Re and Y on the oxidation properties as determined from thermal exposure tests at 1150 °C and detailed microstructural characterization using various electron-optical techniques.

Original language	English
Pages (from-to)	491-507
Number of pages	17
Journal	Oxidation of Metals
Volume	84
Issue number	5-6
DOIs	https://doi.org/10.1007/s11085-015-9566-z
State	Published - 1 Dec 2015

Bibliographical note

Publisher Copyright:
© 2015, Springer Science+Business Media New York.

Keywords

Bond coats
Oxidation
SEM
Superalloys
TEM
Thermal barrier coatings

ASJC Scopus subject areas

Inorganic Chemistry
Metals and Alloys
Materials Chemistry

Access to Document

10.1007/s11085-015-9566-z

Cite this

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title = "Enhancing the Oxidation Properties of Gamma Prime + Gamma Platinum Bond Coat by Rhenium and Yttrium Additions for Improved Adhesion of Thermal Barrier Coatings on Nickel-Base Superalloys",

abstract = "A Re- and Y-modified γ′ + γ Pt bond coat was synthesized by diffusing 25 μm layer of Ni-6 wt\%Re–0.5 wt\%Y alloy and 5 μm layer of Pt into a Ni-based superalloy. It was observed that the modified bond coat can extend the useful life of thermal barrier coating systems with yttria-stabilized zirconia as top coat by more than double relative to the conventional bond coat synthesized by diffusing 8 μm layer of Pt into the same superalloy. The superior performance of the modified bond coat is explained in terms of the combined beneficial effects of Re and Y on the oxidation properties as determined from thermal exposure tests at 1150 °C and detailed microstructural characterization using various electron-optical techniques.",

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N2 - A Re- and Y-modified γ′ + γ Pt bond coat was synthesized by diffusing 25 μm layer of Ni-6 wt%Re–0.5 wt%Y alloy and 5 μm layer of Pt into a Ni-based superalloy. It was observed that the modified bond coat can extend the useful life of thermal barrier coating systems with yttria-stabilized zirconia as top coat by more than double relative to the conventional bond coat synthesized by diffusing 8 μm layer of Pt into the same superalloy. The superior performance of the modified bond coat is explained in terms of the combined beneficial effects of Re and Y on the oxidation properties as determined from thermal exposure tests at 1150 °C and detailed microstructural characterization using various electron-optical techniques.

AB - A Re- and Y-modified γ′ + γ Pt bond coat was synthesized by diffusing 25 μm layer of Ni-6 wt%Re–0.5 wt%Y alloy and 5 μm layer of Pt into a Ni-based superalloy. It was observed that the modified bond coat can extend the useful life of thermal barrier coating systems with yttria-stabilized zirconia as top coat by more than double relative to the conventional bond coat synthesized by diffusing 8 μm layer of Pt into the same superalloy. The superior performance of the modified bond coat is explained in terms of the combined beneficial effects of Re and Y on the oxidation properties as determined from thermal exposure tests at 1150 °C and detailed microstructural characterization using various electron-optical techniques.

KW - Bond coats

KW - Oxidation

KW - SEM

KW - Superalloys

KW - TEM

KW - Thermal barrier coatings

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