Title

Characterization of Kanthal APMT and T91 oxidation at beyond design-basis accident temperatures

Publication Date

3-25-2020

Department

Materials Science and Engineering; Electrical and Computer Engineering; Chemistry; Ames Laboratory; Center for Nondestructive Evaluation (CNDE)

Campus Units

Materials Science and Engineering, Electrical and Computer Engineering, Chemistry, Ames Laboratory, Center for Nondestructive Evaluation (CNDE)

OSTI ID+

1637487

Report Number

IS-J 10245; BNL-216099-2020-JAAM

DOI

10.1016/j.corsci.2020.108598

Journal Title

Corrosion Science

Volume Number

171

First Page

108598

Abstract

Limited information is available on the oxidation mechanism of accident tolerant claddings (ATC) Kanthal APMT and T91 at the onset of beyond design-basis accident (BDBA) conditions. We characterized the surface of these ATC alloys after steam and air exposure at 1200 °C for 2 h, defining the oxidation mechanism. Thickness and composition were analyzed with microscopy, Raman spectroscopy, and synchrotron diffraction. Our results demonstrate that APMT forms a compact and homogeneous α-Al2O3 layer when exposed to air or steam. T91 forms a heterogeneous porous layer, containing a mixture of Cr- and Fe-based oxides, whose composition changes with the exposure environment.

DOE Contract Number(s)

SC0012704; NE0008823; 1917467; 1940055; AC02-07CH11358

Language

en

Department of Energy Subject Categories

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE

Publisher

Iowa State University Digital Repository, Ames IA (United States)

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