Observations of chromium-oxide films containing cerium and yttrium using transmission electron microscopy
- Oregon Graduate Institute of Science and Technology, Portland, OR (United States)
Samples of a pure Fe-26%Cr alloy were sputter-coated with a 4-nm layer of CeO{sub 2} or Y{sub 2}O{sub 3}, then oxidized at 900{degrees}C in 5 x 10{sup -3} torr of oxygen. The oxide scale was removed from the substrate by dissolution of the alloy substrate in a solution of iodine in anhydrous methanol and examined in a transmission electron microscope to determine the microstructure of the oxide and the phases present in the scale. The phases CeCrO{sub 3} (space group 62, Pnma and space group 221 Pm{bar 3}m), YCrO{sub 3} (space group 62, Pnma), and Y{sub 2}O{sub 3} (space group 164, P{bar 3}ml) were found in the oxide scale in the initial stages of oxidation. The relevance of these species in the reactive-element effect is discussed.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 96455
- Journal Information:
- Oxidation of Metals, Vol. 43, Issue 5-6; Other Information: PBD: Jun 1995
- Country of Publication:
- United States
- Language:
- English
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