Determination of the cerium oxidation state in cerium vanadate

Journal Article · Sat Apr 01 04:00:00 EST 1995 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1995.tb08453.x· OSTI ID:82612

Reidy, R F; Swider, K E ^[1]

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1. Naval Research Lab., Washington, DC (United States)

Use of low-quality fuels in gas turbines can lead to vanadium hot corrosion of stabilized-zirconia turbine blade coatings. The stabilizing oxide reacts with V{sub 2}O{sub 5} in the melt, forming a vanadate, thus removing the stabilizer from the zirconia. To better understand the vanadation reaction of one such oxide, CeO{sub 2}, the authors have employed X-ray absorption spectroscopy to determine the oxidation state of the resulting vanadate, CeVO{sub 4}. A comparison of the cerium vanadate X-ray absorption spectra with Ce{sup 4+} and Ce{sup 3+} standards has established that the cerium valence in this compound is 3{sup +}. This result indicates that cerium is reduced during CeVO{sub 4} formation and suggests that the vanadium reactant remains in the 5{sup +} oxidation state.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 82612
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 4 Vol. 78; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
36 MATERIALS SCIENCE
ABSORPTION SPECTROSCOPY
BINDING ENERGY
CERIUM COMPOUNDS
CORROSION
MAGNETIC SUSCEPTIBILITY
TURBINE BLADES
VALENCE
VANADATES
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY