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

Trishelle M. Copeland-Johnson; Charles K.A. Nyamekye; Simerjeet K. Gill; Lynne Ecker; Nicola Bowler; Emily A. Smith; Raul B. Rebak

doi:10.1016/j.corsci.2020.108598

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

Trishelle M. Copeland-Johnson, Charles K.A. Nyamekye, Simerjeet K. Gill, Lynne Ecker, Nicola Bowler, Emily A. Smith, Raul B. Rebak

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

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.

Original language	English
Article number	108598
Journal	Corrosion Science
Volume	171
DOIs	https://doi.org/10.1016/j.corsci.2020.108598
State	Published - Jul 15 2020
Externally published	Yes

Keywords

APMT
Atmospheric corrosion
Raman spectroscopy
SEM
Synchrotron XRD
T91

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10.1016/j.corsci.2020.108598

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title = "Characterization of Kanthal APMT and T91 oxidation at beyond design-basis accident temperatures",

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.",

keywords = "APMT, Atmospheric corrosion, Raman spectroscopy, SEM, Synchrotron XRD, T91",

author = "Copeland-Johnson, {Trishelle M.} and Nyamekye, {Charles K.A.} and Gill, {Simerjeet K.} and Lynne Ecker and Nicola Bowler and Smith, {Emily A.} and Rebak, {Raul B.}",

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doi = "10.1016/j.corsci.2020.108598",

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TY - JOUR

T1 - Characterization of Kanthal APMT and T91 oxidation at beyond design-basis accident temperatures

AU - Copeland-Johnson, Trishelle M.

AU - Nyamekye, Charles K.A.

AU - Gill, Simerjeet K.

AU - Ecker, Lynne

AU - Bowler, Nicola

AU - Smith, Emily A.

AU - Rebak, Raul B.

PY - 2020/7/15

Y1 - 2020/7/15

N2 - 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.

AB - 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.

KW - APMT

KW - Atmospheric corrosion

KW - Raman spectroscopy

KW - SEM

KW - Synchrotron XRD

KW - T91

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DO - 10.1016/j.corsci.2020.108598

M3 - Article

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VL - 171

JO - Corrosion Science

JF - Corrosion Science

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ER -

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

Abstract

Keywords

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