Atomic structure of nano voids in irradiated 3C-SiC

Yan Ru Lin; Liu Gu Chen; Cheng Yo Hsieh; Alice Hu; Sheng Chuan Lo; Fu Rong Chen; Ji Jung Kai

doi:10.1016/j.jnucmat.2017.09.043

Atomic structure of nano voids in irradiated 3C-SiC

Yan Ru Lin, Liu Gu Chen, Cheng Yo Hsieh, Alice Hu, Sheng Chuan Lo, Fu Rong Chen, Ji Jung Kai

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

5 Scopus citations

Abstract

It is important to understand the atomic structure of defect clusters in SiC, a promising material for nuclear application. In this study, we have directly observed and identified nano voids in ion irradiated 3C-SiC at 800 °C, 20 dpa through ABF and HAADF STEM images. A quantitative method was used to analyze HAADF images in which atomic columns with a difference in the number of atoms could be identified and scattered intensities can be computed. Our result shows that these voids are composed of atomic vacancies in an octahedral arrangement. The density of the void was measured by STEM to be 9.2 × 10¹⁹m⁻³ and the size was ∼1.5 nm.

Original language	English
Pages (from-to)	71-75
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	498
DOIs	https://doi.org/10.1016/j.jnucmat.2017.09.043
State	Published - Jan 2018
Externally published	Yes

Funding

This work was supported by the Bureau of Energy, Ministry of Economic Affairs (Taiwan) Program NSC104-AB-001-EJ . Electron Microscopy was performed with the JEM-ARM200F microscope at the Material and Chemical Research Laboratories, which is supported by the Industrial Technology Research Institute, Taiwan (Program G301AA5630 ). We thank Tsai-Tian Wu for his assistance with sample preparation.

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title = "Atomic structure of nano voids in irradiated 3C-SiC",

abstract = "It is important to understand the atomic structure of defect clusters in SiC, a promising material for nuclear application. In this study, we have directly observed and identified nano voids in ion irradiated 3C-SiC at 800 °C, 20 dpa through ABF and HAADF STEM images. A quantitative method was used to analyze HAADF images in which atomic columns with a difference in the number of atoms could be identified and scattered intensities can be computed. Our result shows that these voids are composed of atomic vacancies in an octahedral arrangement. The density of the void was measured by STEM to be 9.2 × 1019m−3 and the size was ∼1.5 nm.",

author = "Lin, {Yan Ru} and Chen, {Liu Gu} and Hsieh, {Cheng Yo} and Alice Hu and Lo, {Sheng Chuan} and Chen, {Fu Rong} and Kai, {Ji Jung}",

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doi = "10.1016/j.jnucmat.2017.09.043",

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T1 - Atomic structure of nano voids in irradiated 3C-SiC

AU - Lin, Yan Ru

AU - Chen, Liu Gu

AU - Hsieh, Cheng Yo

AU - Hu, Alice

AU - Lo, Sheng Chuan

AU - Chen, Fu Rong

AU - Kai, Ji Jung

PY - 2018/1

Y1 - 2018/1

N2 - It is important to understand the atomic structure of defect clusters in SiC, a promising material for nuclear application. In this study, we have directly observed and identified nano voids in ion irradiated 3C-SiC at 800 °C, 20 dpa through ABF and HAADF STEM images. A quantitative method was used to analyze HAADF images in which atomic columns with a difference in the number of atoms could be identified and scattered intensities can be computed. Our result shows that these voids are composed of atomic vacancies in an octahedral arrangement. The density of the void was measured by STEM to be 9.2 × 1019m−3 and the size was ∼1.5 nm.

AB - It is important to understand the atomic structure of defect clusters in SiC, a promising material for nuclear application. In this study, we have directly observed and identified nano voids in ion irradiated 3C-SiC at 800 °C, 20 dpa through ABF and HAADF STEM images. A quantitative method was used to analyze HAADF images in which atomic columns with a difference in the number of atoms could be identified and scattered intensities can be computed. Our result shows that these voids are composed of atomic vacancies in an octahedral arrangement. The density of the void was measured by STEM to be 9.2 × 1019m−3 and the size was ∼1.5 nm.

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JO - Journal of Nuclear Materials

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Atomic structure of nano voids in irradiated 3C-SiC

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