SEDL / STP / STP1023-EB / STP18884S

Oxidation Kinetics and Auger Microprobe Analysis of Some Oxidized Zirconium Alloys

Ploc, RA
Atomic Energy of Canada Limited, Chalk River Nuclear Laboratories, Chalk River, Ontario

Pages: 17    Published: Jan 1989

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Abstract

Oxidation kinetics at 300°C in dry oxygen of 0.5 wt% binary alloys of iron, nickel, and chromium in zirconium were determined for several surface preparations. Further, chemical profiles of the oxides as they existed on the matrix and on the precipitates were obtained by sputtering and Auger electron analysis. The appearance of “breakaway” oxidation was controlled by the surface finish of the alloy, a variable that could be used to eliminate the phenomenon for all alloys except the Zr/Ni binary, which required β-quenching to accomplish the same purpose.