The effects of neutron irradiation on shear properties of monolayered PyC and multilayered PyC/SiC interfaces of SiC/SiC composites

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

doi:10.1016/j.jnucmat.2007.03.096

The effects of neutron irradiation on shear properties of monolayered PyC and multilayered PyC/SiC interfaces of SiC/SiC composites

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

Materials Science and Technology Div

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

35 Scopus citations

Abstract

The effect of neutron irradiation on mechanical properties at the fiber/matrix interface of SiC/SiC composites was evaluated. The materials investigated were Hi-Nicalon™ Type-S fiber reinforced chemically vapor infiltrated SiC matrix composites with varied interphases: monolayered pyrolytic carbon (PyC) or multilayered PyC/SiC. The neutron fluence was 7.7 × 10²⁵ n/m² (E > 0.1 MeV), and the irradiation temperature was 800 °C. Interfacial shear properties were evaluated by the fiber push-out test method. A modified shear-lag model was applied to analyze the interfacial shear parameters. Test results indicate that the interfacial debond shear strength and the interfacial friction stress for the multilayer composites were significantly degraded by irradiation. Nevertheless, the multilayer composites retained sufficient interfacial shear properties so that overall composite strength after neutron irradiation was unaffected. The actual mechanism of interphase property decrease for the multilayer composites is unknown. The interfacial shear properties of the irradiated monolayer composites appear unaffected.

Original language	English
Pages (from-to)	685-691
Number of pages	7
Journal	Journal of Nuclear Materials
Volume	367-370 A
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.jnucmat.2007.03.096
State	Published - Aug 1 2007

Funding

The authors would like to thank Drs T.S. Byun and E. Lara-Curzio for reviewing the manuscript. 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
US Department of Energy	DE-AC05-00OR22725
Fusion Energy Sciences

Access to Document

10.1016/j.jnucmat.2007.03.096

Cite this

@article{3524bac8386441f488637e3486eb070e,

title = "The effects of neutron irradiation on shear properties of monolayered PyC and multilayered PyC/SiC interfaces of SiC/SiC composites",

abstract = "The effect of neutron irradiation on mechanical properties at the fiber/matrix interface of SiC/SiC composites was evaluated. The materials investigated were Hi-Nicalon{\texttrademark} Type-S fiber reinforced chemically vapor infiltrated SiC matrix composites with varied interphases: monolayered pyrolytic carbon (PyC) or multilayered PyC/SiC. The neutron fluence was 7.7 × 1025 n/m2 (E > 0.1 MeV), and the irradiation temperature was 800 °C. Interfacial shear properties were evaluated by the fiber push-out test method. A modified shear-lag model was applied to analyze the interfacial shear parameters. Test results indicate that the interfacial debond shear strength and the interfacial friction stress for the multilayer composites were significantly degraded by irradiation. Nevertheless, the multilayer composites retained sufficient interfacial shear properties so that overall composite strength after neutron irradiation was unaffected. The actual mechanism of interphase property decrease for the multilayer composites is unknown. The interfacial shear properties of the irradiated monolayer composites appear unaffected.",

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

year = "2007",

month = aug,

day = "1",

doi = "10.1016/j.jnucmat.2007.03.096",

language = "English",

volume = "367-370 A",

pages = "685--691",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

number = "SPEC. ISS.",

}

TY - JOUR

T1 - The effects of neutron irradiation on shear properties of monolayered PyC and multilayered PyC/SiC interfaces of SiC/SiC composites

AU - Nozawa, T.

AU - Katoh, Y.

AU - Snead, L. L.

PY - 2007/8/1

Y1 - 2007/8/1

N2 - The effect of neutron irradiation on mechanical properties at the fiber/matrix interface of SiC/SiC composites was evaluated. The materials investigated were Hi-Nicalon™ Type-S fiber reinforced chemically vapor infiltrated SiC matrix composites with varied interphases: monolayered pyrolytic carbon (PyC) or multilayered PyC/SiC. The neutron fluence was 7.7 × 1025 n/m2 (E > 0.1 MeV), and the irradiation temperature was 800 °C. Interfacial shear properties were evaluated by the fiber push-out test method. A modified shear-lag model was applied to analyze the interfacial shear parameters. Test results indicate that the interfacial debond shear strength and the interfacial friction stress for the multilayer composites were significantly degraded by irradiation. Nevertheless, the multilayer composites retained sufficient interfacial shear properties so that overall composite strength after neutron irradiation was unaffected. The actual mechanism of interphase property decrease for the multilayer composites is unknown. The interfacial shear properties of the irradiated monolayer composites appear unaffected.

AB - The effect of neutron irradiation on mechanical properties at the fiber/matrix interface of SiC/SiC composites was evaluated. The materials investigated were Hi-Nicalon™ Type-S fiber reinforced chemically vapor infiltrated SiC matrix composites with varied interphases: monolayered pyrolytic carbon (PyC) or multilayered PyC/SiC. The neutron fluence was 7.7 × 1025 n/m2 (E > 0.1 MeV), and the irradiation temperature was 800 °C. Interfacial shear properties were evaluated by the fiber push-out test method. A modified shear-lag model was applied to analyze the interfacial shear parameters. Test results indicate that the interfacial debond shear strength and the interfacial friction stress for the multilayer composites were significantly degraded by irradiation. Nevertheless, the multilayer composites retained sufficient interfacial shear properties so that overall composite strength after neutron irradiation was unaffected. The actual mechanism of interphase property decrease for the multilayer composites is unknown. The interfacial shear properties of the irradiated monolayer composites appear unaffected.

UR - http://www.scopus.com/inward/record.url?scp=34447550545&partnerID=8YFLogxK

U2 - 10.1016/j.jnucmat.2007.03.096

DO - 10.1016/j.jnucmat.2007.03.096

M3 - Article

AN - SCOPUS:34447550545

SN - 0022-3115

VL - 367-370 A

SP - 685

EP - 691

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - SPEC. ISS.

ER -

The effects of neutron irradiation on shear properties of monolayered PyC and multilayered PyC/SiC interfaces of SiC/SiC composites

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this