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Title: A nanomechanical Raman spectroscopy based assessment of stress distribution in irradiated and corroded SiC

Abstract

Silicon carbide (SiC) composites are under consideration for cladding and structural materials in various types of reactors. The effects of ion irradiation and corrosion on stress distribution due to mechanical loading on chemical vapor deposited (CVD) SiC were investigated here in this paper by using nanomechanical Raman spectroscopy (NMRS). The stress distribution was analyzed as a function of the oxide formation on a corroded specimen and as a function of ion-induced irradiation damage in an irradiated specimen. A finite element method (FEM) based model was developed based on local mechanical properties measured using nanoindentation to predict the NMRS measured stress distribution. The stress distribution was also predicted theoretically by using a stress concentration factor, which is a function of sample geometry and boundary conditions. The maximum stress obtained theoretically was in good agreement with the FEM model and NMRS based measurements. FEM results captured the stress variation trends and maximum stress value in the analyzed samples. NMRS measurements predicted that corrosion had a greater influence on increasing the maximum value of stress in comparison to ion irradiation. The increase in stress attributed to corrosion in comparison to ion irradiated samples was approximately 10%–20%.

Authors:
ORCiD logo [1];  [1];  [1];  [1]
  1. Purdue University, West Lafayette, IN (United States)
Publication Date:
Research Org.:
Purdue Univ., West Lafayette, IN (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1538490
Alternate Identifier(s):
OSTI ID: 1549553
Grant/Contract Number:  
NE0008259; NE0008558
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 497; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Mohanty, Debapriya Pinaki, Wang, Hao, Okuniewski, Maria, and Tomar, Vikas. A nanomechanical Raman spectroscopy based assessment of stress distribution in irradiated and corroded SiC. United States: N. p., 2017. Web. doi:10.1016/j.jnucmat.2017.07.025.
Mohanty, Debapriya Pinaki, Wang, Hao, Okuniewski, Maria, & Tomar, Vikas. A nanomechanical Raman spectroscopy based assessment of stress distribution in irradiated and corroded SiC. United States. https://doi.org/10.1016/j.jnucmat.2017.07.025
Mohanty, Debapriya Pinaki, Wang, Hao, Okuniewski, Maria, and Tomar, Vikas. Thu . "A nanomechanical Raman spectroscopy based assessment of stress distribution in irradiated and corroded SiC". United States. https://doi.org/10.1016/j.jnucmat.2017.07.025. https://www.osti.gov/servlets/purl/1538490.
@article{osti_1538490,
title = {A nanomechanical Raman spectroscopy based assessment of stress distribution in irradiated and corroded SiC},
author = {Mohanty, Debapriya Pinaki and Wang, Hao and Okuniewski, Maria and Tomar, Vikas},
abstractNote = {Silicon carbide (SiC) composites are under consideration for cladding and structural materials in various types of reactors. The effects of ion irradiation and corrosion on stress distribution due to mechanical loading on chemical vapor deposited (CVD) SiC were investigated here in this paper by using nanomechanical Raman spectroscopy (NMRS). The stress distribution was analyzed as a function of the oxide formation on a corroded specimen and as a function of ion-induced irradiation damage in an irradiated specimen. A finite element method (FEM) based model was developed based on local mechanical properties measured using nanoindentation to predict the NMRS measured stress distribution. The stress distribution was also predicted theoretically by using a stress concentration factor, which is a function of sample geometry and boundary conditions. The maximum stress obtained theoretically was in good agreement with the FEM model and NMRS based measurements. FEM results captured the stress variation trends and maximum stress value in the analyzed samples. NMRS measurements predicted that corrosion had a greater influence on increasing the maximum value of stress in comparison to ion irradiation. The increase in stress attributed to corrosion in comparison to ion irradiated samples was approximately 10%–20%.},
doi = {10.1016/j.jnucmat.2017.07.025},
journal = {Journal of Nuclear Materials},
number = C,
volume = 497,
place = {United States},
year = {Thu Jul 13 00:00:00 EDT 2017},
month = {Thu Jul 13 00:00:00 EDT 2017}
}

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Cited by: 6 works
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