Transformation-induced reduction in the oxidation rate of ordered Zr/sub 3/Al

Journal Article · Fri Aug 01 04:00:00 EDT 1980 · Metall. Trans., A; (United States)

DOI:https://doi.org/10.1007/BF02653503· OSTI ID:5103971

Schulson, E M ^[1]; Trottier, T P

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1. Dartmouth College, Hanover, NH

Oxidation experiments in air from 775 to 1145/sup 0/K have established that at temperatures of 975/sup 0/K and above, the peritectoid Ll/sub 2/ phase, Zr/sub 3/Al, under the influence of oxygen and nitrogen, undergoes the reverse peritectoid transformation Zr/sub 3/Al ..-->.. Zr/sub 2/Al + Zr. This decomposition results in the formation of a lamellar Zr/sub 2/Al/Zr product beneath the exposed surface. Correspondingly, the shortterm oxidation rate decreases and the oxide film becomes more adherent. The change in character is caused, at least in part, by the preferential oxidation of the ..cap alpha..Zr phase within the lamellar product, which leads to oxide platelets being held between the unoxidized Zr/sub 2/Al lamellae.

• OSTI ID: 5103971
• Journal Information: Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 11:8; ISSN MTTAB
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200 -- Nuclear Reactor Technology-- Components & Accessories
36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ALUMINIUM ALLOYS
CHEMICAL REACTIONS
CHROMIUM ADDITIONS
CHROMIUM ALLOYS
IRON ADDITIONS
IRON ALLOYS
MATERIALS
OXIDATION
REACTOR MATERIALS
TIN ALLOYS
ZIRCALOY
ZIRCALOY 2
ZIRCONIUM ALLOYS
ZIRCONIUM BASE ALLOYS