Characterisation of oxide scale formation on a new single crystal superalloy for power generation applications

Atsushi Sato; Yu Lung Chiu; Emmanuelle A. Marquis; Roger C. Reed

doi:10.3184/096034012X13335334078005

Characterisation of oxide scale formation on a new single crystal superalloy for power generation applications

Atsushi Sato^*, Yu Lung Chiu, Emmanuelle A. Marquis, Roger C. Reed

^*Corresponding author for this work

Metallurgy and Materials

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

8 Citations (Scopus)

Abstract

The oxidation behaviour at 950°C of a prototype nickel-based single crystal superalloy containing ~15 wt%Cr is studied, with and without silicon alloying. It is demonstrated that the alloy is a marginal alumina former, with further alloying by Si promoting the formation of a continuous, protective alumina scale. Transmission electron microscopy reveals that out-growing alumina forms during the early stages of oxidation. The presence of silicon within the alumina is detected using atom probe tomography.

Original language	English
Pages (from-to)	272-278
Number of pages	7
Journal	Materials at High Temperatures
Volume	29
Issue number	3
DOIs	https://doi.org/10.3184/096034012X13335334078005
Publication status	Published - 1 Aug 2012

Keywords

Heterogeneous nucleation of phase transformations
Kinetics
Nickel alloys
Oxidation
Superalloy

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.3184/096034012X13335334078005

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abstract = "The oxidation behaviour at 950°C of a prototype nickel-based single crystal superalloy containing ~15 wt%Cr is studied, with and without silicon alloying. It is demonstrated that the alloy is a marginal alumina former, with further alloying by Si promoting the formation of a continuous, protective alumina scale. Transmission electron microscopy reveals that out-growing alumina forms during the early stages of oxidation. The presence of silicon within the alumina is detected using atom probe tomography.",

keywords = "Heterogeneous nucleation of phase transformations, Kinetics, Nickel alloys, Oxidation, Superalloy",

author = "Atsushi Sato and Chiu, {Yu Lung} and Marquis, {Emmanuelle A.} and Reed, {Roger C.}",

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AU - Sato, Atsushi

AU - Chiu, Yu Lung

AU - Marquis, Emmanuelle A.

AU - Reed, Roger C.

PY - 2012/8/1

Y1 - 2012/8/1

N2 - The oxidation behaviour at 950°C of a prototype nickel-based single crystal superalloy containing ~15 wt%Cr is studied, with and without silicon alloying. It is demonstrated that the alloy is a marginal alumina former, with further alloying by Si promoting the formation of a continuous, protective alumina scale. Transmission electron microscopy reveals that out-growing alumina forms during the early stages of oxidation. The presence of silicon within the alumina is detected using atom probe tomography.

AB - The oxidation behaviour at 950°C of a prototype nickel-based single crystal superalloy containing ~15 wt%Cr is studied, with and without silicon alloying. It is demonstrated that the alloy is a marginal alumina former, with further alloying by Si promoting the formation of a continuous, protective alumina scale. Transmission electron microscopy reveals that out-growing alumina forms during the early stages of oxidation. The presence of silicon within the alumina is detected using atom probe tomography.

KW - Heterogeneous nucleation of phase transformations

KW - Kinetics

KW - Nickel alloys

KW - Oxidation

KW - Superalloy

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JO - Materials at High Temperatures

JF - Materials at High Temperatures

IS - 3

ER -

Characterisation of oxide scale formation on a new single crystal superalloy for power generation applications

Abstract

Keywords

ASJC Scopus subject areas

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