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Title: Raman study of amorphization in nanocrystalline 3C–SiC irradiated with C + and He + ions

Journal Article · · Journal of Raman Spectroscopy
DOI:https://doi.org/10.1002/jrs.5631· OSTI ID:1523304
ORCiD logo [1];  [2];  [1];  [3];  [1];  [1];  [1]
  1. School of Nuclear Science and Technology Lanzhou University Lanzhou Gansu China, Engineering Research Center for Neutron Application Technology, Ministry of Education Lanzhou University Lanzhou Gansu China
  2. Energy and Environment Directorate Pacific Northwest National Laboratory Richland Washington
  3. Laboratório de Implantação Iônica, Instituto de Fίsica Universidade Federal do Rio Grande do Sul Porto Alegre Brazil

Abstract This study examines C + and He + ion irradiation‐induced amorphization processes in 3C–SiC nanograins embedded in an amorphous SiC matrix. Raman spectroscopy and Rutherford backscattering spectrometry are used for damage characterization. SiC grains with an average size of either ~6 or ~20 nm were observed to be fully amorphized to a lower dose at room temperature compared with their monocrystalline counterpart under the identical irradiation condition. In addition to damage accumulation‐induced amorphization in the grains, preferential amorphization at the crystalline/amorphous interfaces could play a significant role. This interface‐driven amorphization proceeds at comparable rates for C + and He + ion irradiations. The results may have an important implication for nanocrystalline SiC to be applied in advanced nuclear reactors.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE‐AC05‐76RL01830
OSTI ID:
1523304
Journal Information:
Journal of Raman Spectroscopy, Journal Name: Journal of Raman Spectroscopy Vol. 50 Journal Issue: 8; ISSN 0377-0486
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Netherlands
Language:
English
Citation Metrics:
Cited by: 15 works
Citation information provided by
Web of Science

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