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Title: Effect of Neutron Irradiation on Tensile Properties of Unidirectional Silicon Carbide Composites

Abstract

Tensile properties of uni-directionally reinforced Hi-Nicalon EType S SiC fiber, chemically vapor-infiltrated (CVI) SiC-matrix composites, with either pyrolytic carbon (PyC) or multilayered PyC/SiC interphase, were characterized following neutron irradiations to the maximum fluence of 7.7x1025 n/m2 at 380 and 800 C. The stress - strain behavior of the multilayered interphase composites remained unmodified after irradiation. The PyC interphase composite increased in ultimate tensile stress and strain to failure following neutron irradiation, whereas the proportional limit stress exhibited a slight decrease. Potential mechanisms for these changes include accommodation of misfit stress through irradiation creep, reduced interfacial friction, and differential swelling among individual composite constituents.

Authors:
 [1];  [1];  [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); High Flux Isotope Reactor
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
978204
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Nuclear Materials; Journal Volume: 367; Journal Issue: 1
Country of Publication:
United States
Language:
English

Citation Formats

Katoh, Yutai, Nozawa, Takashi, Snead, Lance Lewis, and Hinoki, Tatsuya. Effect of Neutron Irradiation on Tensile Properties of Unidirectional Silicon Carbide Composites. United States: N. p., 2007. Web. doi:10.1016/j.jnucmat.2007.03.083.
Katoh, Yutai, Nozawa, Takashi, Snead, Lance Lewis, & Hinoki, Tatsuya. Effect of Neutron Irradiation on Tensile Properties of Unidirectional Silicon Carbide Composites. United States. doi:10.1016/j.jnucmat.2007.03.083.
Katoh, Yutai, Nozawa, Takashi, Snead, Lance Lewis, and Hinoki, Tatsuya. Mon . "Effect of Neutron Irradiation on Tensile Properties of Unidirectional Silicon Carbide Composites". United States. doi:10.1016/j.jnucmat.2007.03.083.
@article{osti_978204,
title = {Effect of Neutron Irradiation on Tensile Properties of Unidirectional Silicon Carbide Composites},
author = {Katoh, Yutai and Nozawa, Takashi and Snead, Lance Lewis and Hinoki, Tatsuya},
abstractNote = {Tensile properties of uni-directionally reinforced Hi-Nicalon EType S SiC fiber, chemically vapor-infiltrated (CVI) SiC-matrix composites, with either pyrolytic carbon (PyC) or multilayered PyC/SiC interphase, were characterized following neutron irradiations to the maximum fluence of 7.7x1025 n/m2 at 380 and 800 C. The stress - strain behavior of the multilayered interphase composites remained unmodified after irradiation. The PyC interphase composite increased in ultimate tensile stress and strain to failure following neutron irradiation, whereas the proportional limit stress exhibited a slight decrease. Potential mechanisms for these changes include accommodation of misfit stress through irradiation creep, reduced interfacial friction, and differential swelling among individual composite constituents.},
doi = {10.1016/j.jnucmat.2007.03.083},
journal = {Journal of Nuclear Materials},
number = 1,
volume = 367,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}