Effect of Y2O3 content on the oxidation behavior of Fe-Cr-Al-based ODS alloys

Anwar Ul-Hamid

doi:10.1361/105994903770343529

Effect of Y₂O₃ content on the oxidation behavior of Fe-Cr-Al-based ODS alloys

Anwar Ul-Hamid^*

^*Corresponding author for this work

Core Research Facilities

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

12 Scopus citations

Abstract

A study was conducted to investigate the cyclic oxidation behavior of two oxide dispersion strengthened (ODS) Fe-Cr-Al based alloys containing 0.17 wt.% and 0.7 wt.% Y₂O₃. The alloys were oxidized in air for 100 h at 1200°C based on a 24 h cycle period. X-ray diffraction (XRD) and analytical transmission electron microscopy (TEM) were used to characterize the structure, morphology, and composition of the oxide scales. Both alloys formed highly adherent and continuous layers of α-Al₂O₃ exhibiting a morphology indicative of inward scale growth. The role of Y₂O₃ was to promote adherence by segregating to the grain boundaries within the oxide. Concurrently, Y₂O₃ generated micro-porosity resulting in a scale of comparatively higher thickness in the alloy with 0.7 wt.% Y₂O₃.

Original language	English
Pages (from-to)	87-94
Number of pages	8
Journal	Journal of Materials Engineering and Performance
Volume	12
Issue number	1
DOIs	https://doi.org/10.1361/105994903770343529
State	Published - Feb 2003

Keywords

Fe-Cr-Al
MA956
Oxidation
REE
TEM
YO

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1361/105994903770343529

Cite this

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title = "Effect of Y2O3 content on the oxidation behavior of Fe-Cr-Al-based ODS alloys",

abstract = "A study was conducted to investigate the cyclic oxidation behavior of two oxide dispersion strengthened (ODS) Fe-Cr-Al based alloys containing 0.17 wt.\% and 0.7 wt.\% Y2O3. The alloys were oxidized in air for 100 h at 1200°C based on a 24 h cycle period. X-ray diffraction (XRD) and analytical transmission electron microscopy (TEM) were used to characterize the structure, morphology, and composition of the oxide scales. Both alloys formed highly adherent and continuous layers of α-Al2O3 exhibiting a morphology indicative of inward scale growth. The role of Y2O3 was to promote adherence by segregating to the grain boundaries within the oxide. Concurrently, Y2O3 generated micro-porosity resulting in a scale of comparatively higher thickness in the alloy with 0.7 wt.\% Y2O3.",

keywords = "Fe-Cr-Al, MA956, Oxidation, REE, TEM, YO",

author = "Anwar Ul-Hamid",

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T1 - Effect of Y2O3 content on the oxidation behavior of Fe-Cr-Al-based ODS alloys

AU - Ul-Hamid, Anwar

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N2 - A study was conducted to investigate the cyclic oxidation behavior of two oxide dispersion strengthened (ODS) Fe-Cr-Al based alloys containing 0.17 wt.% and 0.7 wt.% Y2O3. The alloys were oxidized in air for 100 h at 1200°C based on a 24 h cycle period. X-ray diffraction (XRD) and analytical transmission electron microscopy (TEM) were used to characterize the structure, morphology, and composition of the oxide scales. Both alloys formed highly adherent and continuous layers of α-Al2O3 exhibiting a morphology indicative of inward scale growth. The role of Y2O3 was to promote adherence by segregating to the grain boundaries within the oxide. Concurrently, Y2O3 generated micro-porosity resulting in a scale of comparatively higher thickness in the alloy with 0.7 wt.% Y2O3.

AB - A study was conducted to investigate the cyclic oxidation behavior of two oxide dispersion strengthened (ODS) Fe-Cr-Al based alloys containing 0.17 wt.% and 0.7 wt.% Y2O3. The alloys were oxidized in air for 100 h at 1200°C based on a 24 h cycle period. X-ray diffraction (XRD) and analytical transmission electron microscopy (TEM) were used to characterize the structure, morphology, and composition of the oxide scales. Both alloys formed highly adherent and continuous layers of α-Al2O3 exhibiting a morphology indicative of inward scale growth. The role of Y2O3 was to promote adherence by segregating to the grain boundaries within the oxide. Concurrently, Y2O3 generated micro-porosity resulting in a scale of comparatively higher thickness in the alloy with 0.7 wt.% Y2O3.

KW - Fe-Cr-Al

KW - MA956

KW - Oxidation

KW - REE

KW - TEM

KW - YO

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DO - 10.1361/105994903770343529

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