Sulfidation-oxidation behavior of FeCrAl and TiCrAl and the third-element effect

M. P. Brady; P. F. Tortorelli; K. L. More; L. R. Walker

doi:10.1007/s11085-010-9194-6

Sulfidation-oxidation behavior of FeCrAl and TiCrAl and the third-element effect

M. P. Brady, P. F. Tortorelli, K. L. More, L. R. Walker

Center for Nanophase Matls Sciences

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

14 Scopus citations

Abstract

Short-term sulfidation-oxidation exposures were conducted under high pS ₂ and low pO ₂ conditions for TiCrAl and FeCrAl alloys at 600 and 800 °C. Low mass gains and submicron Al-and Ti-rich oxide scales were formed on TiCrAl at 600 °C, while high mass gains and FeS-based scale formation were observed for FeCrAl. Based on the good behavior of TiCrAl, third-element effect additions of Cr are not inherently detrimental under sulfidation-oxidation conditions. Rather, differences in the mechanistic action of the third-element addition of Cr between FeCrAl and TiCrAl alloys and its relevance to low oxygen potential sulfidation-oxidation environments were the key factors in determining whether or not a protective alumina scale was established.

Original language	English
Pages (from-to)	1-9
Number of pages	9
Journal	Oxidation of Metals
Volume	74
Issue number	1-2
DOIs	https://doi.org/10.1007/s11085-010-9194-6
State	Published - Aug 2010

Funding

Acknowledgements The authors thank I.G. Wright, T. Bessman, S. Dryepondt, and B.A. Pint for reviewing this manuscript. Funding from the U.S. Department of Energy’s Fossil Energy Advanced Research Materials Program is gratefully acknowledged. Research supported by ORNL’s SHaRE User Facility, which is sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, the U.S. Department of Energy. ORNL is managed by UT-Battelle, LLC for the US DOE under contract DE-AC05-00OR22725. Notice: This submission was sponsored by a contractor of the United States Government under contract DE-AC05-00OR22725 with the United States Department of Energy. The United States Government retains, and the publisher, by accepting this submission for publication, acknowledges that the United States Government retains, a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this submission, or allow others to do so, for United States Government purposes.

Keywords

Alumina
Oxidation
Sulfidation
Third-element effect
Titanium aluminide

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10.1007/s11085-010-9194-6

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abstract = "Short-term sulfidation-oxidation exposures were conducted under high pS 2 and low pO 2 conditions for TiCrAl and FeCrAl alloys at 600 and 800 °C. Low mass gains and submicron Al-and Ti-rich oxide scales were formed on TiCrAl at 600 °C, while high mass gains and FeS-based scale formation were observed for FeCrAl. Based on the good behavior of TiCrAl, third-element effect additions of Cr are not inherently detrimental under sulfidation-oxidation conditions. Rather, differences in the mechanistic action of the third-element addition of Cr between FeCrAl and TiCrAl alloys and its relevance to low oxygen potential sulfidation-oxidation environments were the key factors in determining whether or not a protective alumina scale was established.",

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AB - Short-term sulfidation-oxidation exposures were conducted under high pS 2 and low pO 2 conditions for TiCrAl and FeCrAl alloys at 600 and 800 °C. Low mass gains and submicron Al-and Ti-rich oxide scales were formed on TiCrAl at 600 °C, while high mass gains and FeS-based scale formation were observed for FeCrAl. Based on the good behavior of TiCrAl, third-element effect additions of Cr are not inherently detrimental under sulfidation-oxidation conditions. Rather, differences in the mechanistic action of the third-element addition of Cr between FeCrAl and TiCrAl alloys and its relevance to low oxygen potential sulfidation-oxidation environments were the key factors in determining whether or not a protective alumina scale was established.

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Sulfidation-oxidation behavior of FeCrAl and TiCrAl and the third-element effect

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