Contribution of dangling-bonds to polycrystalline SiC corrosion

Sosuke Kondo; Kotaro Seki; Yuki Maeda; Hao Yu; Kazuhiro Fukami; Ryuta Kasada

doi:10.1016/j.scriptamat.2020.07.001

Contribution of dangling-bonds to polycrystalline SiC corrosion

Sosuke Kondo, Kotaro Seki, Yuki Maeda, Hao Yu, Kazuhiro Fukami, Ryuta Kasada

IMR - Materials Design Division

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

5 Citations (Scopus)

Abstract

The relationship between lattice defects and the corrosion of SiC irradiated with heavy ions at 400 °C and 800 °C was investigated using electrochemistry and electron spin resonance spectroscopy. An immersion test in high-pressure hot water was also used to evaluate surface recession. The corrosion current increased monotonically with dangling-bond (DB) density, indicating that DBs were the primary reaction sites. Further, the surface recession rate in hot water increased exponentially with increasing DB density. The dense DBs were found to be surrounded by distorted lattices. These findings indicated that SiC dissolution was further accelerated by the accumulated lattice distortion.

Original language	English
Pages (from-to)	6-9
Number of pages	4
Journal	Scripta Materialia
Volume	188
DOIs	https://doi.org/10.1016/j.scriptamat.2020.07.001
Publication status	Published - 2020 Nov

Keywords

Ceramics
Corrosion
Electrochemistry
Lattice defects

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10.1016/j.scriptamat.2020.07.001

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title = "Contribution of dangling-bonds to polycrystalline SiC corrosion",

abstract = "The relationship between lattice defects and the corrosion of SiC irradiated with heavy ions at 400 °C and 800 °C was investigated using electrochemistry and electron spin resonance spectroscopy. An immersion test in high-pressure hot water was also used to evaluate surface recession. The corrosion current increased monotonically with dangling-bond (DB) density, indicating that DBs were the primary reaction sites. Further, the surface recession rate in hot water increased exponentially with increasing DB density. The dense DBs were found to be surrounded by distorted lattices. These findings indicated that SiC dissolution was further accelerated by the accumulated lattice distortion.",

keywords = "Ceramics, Corrosion, Electrochemistry, Lattice defects",

author = "Sosuke Kondo and Kotaro Seki and Yuki Maeda and Hao Yu and Kazuhiro Fukami and Ryuta Kasada",

note = "Funding Information: This work was supported by JSPS Grants-in-Aid for Young Scientist (A) (No. 17H04977 ), by GIMRT Program of the Institute for Materials Research, Tohoku University (No. 20G0411 ), and by the Joint Usage/Research Program on Zero-Emission Energy Research, Institute of Advanced Energy, Kyoto University . Publisher Copyright: {\textcopyright} 2020",

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language = "English",

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T1 - Contribution of dangling-bonds to polycrystalline SiC corrosion

AU - Kondo, Sosuke

AU - Seki, Kotaro

AU - Maeda, Yuki

AU - Yu, Hao

AU - Fukami, Kazuhiro

AU - Kasada, Ryuta

N1 - Funding Information: This work was supported by JSPS Grants-in-Aid for Young Scientist (A) (No. 17H04977 ), by GIMRT Program of the Institute for Materials Research, Tohoku University (No. 20G0411 ), and by the Joint Usage/Research Program on Zero-Emission Energy Research, Institute of Advanced Energy, Kyoto University . Publisher Copyright: © 2020

PY - 2020/11

Y1 - 2020/11

N2 - The relationship between lattice defects and the corrosion of SiC irradiated with heavy ions at 400 °C and 800 °C was investigated using electrochemistry and electron spin resonance spectroscopy. An immersion test in high-pressure hot water was also used to evaluate surface recession. The corrosion current increased monotonically with dangling-bond (DB) density, indicating that DBs were the primary reaction sites. Further, the surface recession rate in hot water increased exponentially with increasing DB density. The dense DBs were found to be surrounded by distorted lattices. These findings indicated that SiC dissolution was further accelerated by the accumulated lattice distortion.

AB - The relationship between lattice defects and the corrosion of SiC irradiated with heavy ions at 400 °C and 800 °C was investigated using electrochemistry and electron spin resonance spectroscopy. An immersion test in high-pressure hot water was also used to evaluate surface recession. The corrosion current increased monotonically with dangling-bond (DB) density, indicating that DBs were the primary reaction sites. Further, the surface recession rate in hot water increased exponentially with increasing DB density. The dense DBs were found to be surrounded by distorted lattices. These findings indicated that SiC dissolution was further accelerated by the accumulated lattice distortion.

KW - Ceramics

KW - Corrosion

KW - Electrochemistry

KW - Lattice defects

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SP - 6

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JO - Scripta Materialia

JF - Scripta Materialia

ER -

Contribution of dangling-bonds to polycrystalline SiC corrosion

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Keywords

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