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

University of California at Berkeley

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

54 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

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Ltd

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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title = "Micro-mechanical evaluation of SiC-SiC composite interphase properties and debond mechanisms",

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 - Kabel, J.

AU - Yang, Y.

AU - Balooch, M.

AU - Howard, C.

AU - Koyanagi, T.

AU - Terrani, K. A.

AU - Katoh, Y.

AU - Hosemann, P.

PY - 2017/12/15

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N2 - 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.

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

KW - Pyrolytic carbon (PyC)

KW - SiC-SiC

KW - Small scale mechanical testing (SSMT)

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JO - Composites Part B: Engineering

JF - Composites Part B: Engineering

ER -

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

Abstract

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Keywords

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