Accession Number:

AD0763511

Title:

Oxidation Properties of a Zirconium-2.7 w/o Niobium Alloy in the Temperature Range 650 Degrees-1000 Degrees C,

Descriptive Note:

Corporate Author:

MCMASTER UNIV HAMILTON (ONTARIO) DEPT OF METALLURGY AND MATERIALS SCIENCE

Personal Author(s):

Report Date:

1972-06-06

Pagination or Media Count:

5.0

Abstract:

The reaction kinetics and structures of the alloyoxide composite system were determined for a Zr-2.7 weight per cent Nb alloy exposed at temperatures over the range 650-1000C in oxygen at 1 atm pressure. These kinetics may be represented by a parabolic-linear relationship. The zirconia scales contained small amounts of the intramolecular oxide, 6ZrO2-Nb2O5. An investigation was carried out on the morphological development of the columnar scale and the underlying layer of oxygen stabilized alpha-Zr plates in the beta-Zr alloy during parabolic oxidation. The sequence of the reaction product layers was consistent with predictions from the Zr-Nb-O phase diagram. Author

Subject Categories:

  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE