Effect of H2O and CO2 on The Oxidation Behavior and Durability at High Temperature of ODS-FeCrAl

Journal Article · Tue Jan 01 00:00:00 EST 2013 · Oxidation of Metals

DOI:https://doi.org/10.1007/s11085-013-9382-2· OSTI ID:1158759

Dryepondt, Sebastien N ^[1]; Pint, Bruce A ^[1]; Rouaix-Vande Put, Aurelie ^[2]

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1. ORNL
2. CIRIMAT-ENSIACET, Toulouse, France

Cyclic oxidation testing was conducted on alloy MA956 and two different batches of alloy PM2000 at 1100 and 1200 C in different atmospheres rich in O2, H2O and CO2. Compared to 1h cycles in dry O2, exposure in air+10 vol.% H2O resulted in an increase of the oxidation rate and a decrease of the time to breakaway for all alloys at 1200 C, and a faster consumption of Al in the MA956 alloy. One hour cyclic testing in 49.25%CO2+50%H2O+0.75% O2 had a smaller effect on the oxidation rate but led to increased formation of voids in alloy MA956, which had an impact on the alloy creep resistance. At 1100 C, exposure in 50%CO2+50%H2O resulted in significant oxide spallation compared with oxidation in air, but this was not the case when 0.75% O2 was added to the CO2/H2O mixture as a buffer. The control of impurity levels drastically improved the oxidation resistance of PM2000.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: FE USDOE - Office of Fossil Energy (FE)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1158759
• Journal Information: Oxidation of Metals, Vol. 79, Issue 5-6; ISSN 0030--770X
• Country of Publication: United States
• Language: English

Related Subjects

ODS alloys
Lifetime
H2O
CO2