Micro-mechanical evaluation of SiC-SiC composite interphase properties and debond mechanisms

J. Kabel; Y. Yang; M. Balooch; C. Howard; T. Koyanagi; K. A. Terrani; Y. Katoh; P. Hosemann

doi:10.1016/j.compositesb.2017.07.035

Micro-mechanical evaluation of SiC-SiC composite interphase properties and debond mechanisms

J. Kabel, Y. Yang, M. Balooch, C. Howard, T. Koyanagi, K. A. Terrani, Y. Katoh, P. Hosemann

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

59 Scopus citations

Abstract

SiC-SiC composites exhibit exceptional high temperature strength and oxidation properties making them an advantageous choice for accident tolerant nuclear fuel cladding. In the present work, small scale mechanical testing along with AFM and TEM analysis were employed to evaluate PyC interphase properties that play a key role in the overall mechanical behavior of the composite. The Mohr-Coulomb formulation allowed for the extraction of the internal friction coefficient and debonding shear strength as a function of the PyC layer thickness, an additional parameter. These results have led to re-evaluation of the Mohr-Coulomb failure criterion and adjustment via a new phenomenological equation.

Original language	English
Pages (from-to)	173-183
Number of pages	11
Journal	Composites Part B: Engineering
Volume	131
DOIs	https://doi.org/10.1016/j.compositesb.2017.07.035
State	Published - Dec 15 2017
Externally published	Yes

Funding

This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ). This work was supported by the U.S. Department of Energy (DOE) , Office of Nuclear Energy's Nuclear Science User Facilities (NSUF) program. A portion of this study was also supported by the U.S. DOE , Office of Nuclear Energy for the Advanced Fuels Campaign of the Fuel Cycle R&D program under contact DE-AC05-00OR22725 with Oak Ridge National Laboratory managed by UT Battelle, LLC.

Funders	Funder number
U.S. Department of Energy	DE-AC05-00OR22725
Office of Nuclear Energy
UT-Battelle

Keywords

Composites
Interface
Interphase
Micro-mechanical
Micro-pillar compression
Nuclear
Pyrolytic carbon (PyC)
SiC-SiC
Small scale mechanical testing (SSMT)

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10.1016/j.compositesb.2017.07.035

Cite this

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abstract = "SiC-SiC composites exhibit exceptional high temperature strength and oxidation properties making them an advantageous choice for accident tolerant nuclear fuel cladding. In the present work, small scale mechanical testing along with AFM and TEM analysis were employed to evaluate PyC interphase properties that play a key role in the overall mechanical behavior of the composite. The Mohr-Coulomb formulation allowed for the extraction of the internal friction coefficient and debonding shear strength as a function of the PyC layer thickness, an additional parameter. These results have led to re-evaluation of the Mohr-Coulomb failure criterion and adjustment via a new phenomenological equation.",

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AU - Yang, Y.

AU - Balooch, M.

AU - Howard, C.

AU - Koyanagi, T.

AU - Terrani, K. A.

AU - Katoh, Y.

AU - Hosemann, P.

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AB - SiC-SiC composites exhibit exceptional high temperature strength and oxidation properties making them an advantageous choice for accident tolerant nuclear fuel cladding. In the present work, small scale mechanical testing along with AFM and TEM analysis were employed to evaluate PyC interphase properties that play a key role in the overall mechanical behavior of the composite. The Mohr-Coulomb formulation allowed for the extraction of the internal friction coefficient and debonding shear strength as a function of the PyC layer thickness, an additional parameter. These results have led to re-evaluation of the Mohr-Coulomb failure criterion and adjustment via a new phenomenological equation.

KW - Composites

KW - Interface

KW - Interphase

KW - Micro-mechanical

KW - Micro-pillar compression

KW - Nuclear

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Micro-mechanical evaluation of SiC-SiC composite interphase properties and debond mechanisms

Abstract

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Keywords

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