Effect of neutron irradiation on tensile properties of unidirectional silicon carbide composites

Y. Katoh; T. Nozawa; L. L. Snead; T. Hinoki

doi:10.1016/j.jnucmat.2007.03.083

Effect of neutron irradiation on tensile properties of unidirectional silicon carbide composites

Y. Katoh, T. Nozawa, L. L. Snead, T. Hinoki

Materials Science and Technology Div

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

31 Scopus citations

Abstract

Tensile properties of unidirectionally reinforced Hi-Nicalon™ Type 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 7.7 × 10²⁵ 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.

Original language	English
Pages (from-to)	774-779
Number of pages	6
Journal	Journal of Nuclear Materials
Volume	367-370 A
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.jnucmat.2007.03.083
State	Published - Aug 1 2007

Funding

This research was sponsored by the Office of Fusion Energy Sciences, US Department of Energy under contract DE-AC05-00OR22725 with UT-Battelle, LLC.

Funders	Funder number
U.S. Department of Energy	DE-AC05-00OR22725
Fusion Energy Sciences

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title = "Effect of neutron irradiation on tensile properties of unidirectional silicon carbide composites",

abstract = "Tensile properties of unidirectionally reinforced Hi-Nicalon{\texttrademark} Type 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 7.7 × 1025 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.",

author = "Y. Katoh and T. Nozawa and Snead, {L. L.} and T. Hinoki",

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doi = "10.1016/j.jnucmat.2007.03.083",

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T1 - Effect of neutron irradiation on tensile properties of unidirectional silicon carbide composites

AU - Katoh, Y.

AU - Nozawa, T.

AU - Snead, L. L.

AU - Hinoki, T.

PY - 2007/8/1

Y1 - 2007/8/1

N2 - Tensile properties of unidirectionally reinforced Hi-Nicalon™ Type 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 7.7 × 1025 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.

AB - Tensile properties of unidirectionally reinforced Hi-Nicalon™ Type 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 7.7 × 1025 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.

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JO - Journal of Nuclear Materials

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Effect of neutron irradiation on tensile properties of unidirectional silicon carbide composites

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