Chemistry, Electrical and Computer Engineering, Materials Science and Engineering, Ames Laboratory, Center for Nondestructive Evaluation (CNDE)
Journal or Book Title
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.
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Copeland-Johnson, Trishelle M.; Nyamekye, Charles K. A.; Gill, Simerjeet; Ecker, Lynne; Bowler, Nicola; Smith, Emily A.; and Rebak, Raul B., "Characterization of Kanthal APMT and T91 oxidation at beyond design-basis accident temperatures" (2020). Materials Science and Engineering Publications. 369.
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