Influence of fiber coating thickness on fracture behavior of continuous woven Nicalon® fabric-reinforced silicon-carbide matrix ceramic composites

J. H. Miller; P. K. Liaw; J. D. Landes

doi:10.1016/S0921-5093(01)01184-4

Influence of fiber coating thickness on fracture behavior of continuous woven Nicalon® fabric-reinforced silicon-carbide matrix ceramic composites

J. H. Miller, P. K. Liaw, J. D. Landes

Nonreactor Nuclear Facilities Division

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

46 Scopus citations

Abstract

Nicalon^® plain-weave fiber fabric-reinforced silicon carbide (SiC) matrix composites with various pyrolytic carbon fiber/matrix interface coating thicknesses have been successfully fabricated by forced chemical vapor infiltration (FCVI) methods. The influence of the carbon interface coating thickness on the fracture behavior of these fiber fabric-reinforced SiC composites has been investigated. Experimental results indicate that fiber coating thickness significantly alters the fracture behavior of SiC composites. The fracture strength exhibits a maximum as the coating thickness increases. A theoretical model has been developed to simulate the fracture behavior in the SiC composites with varied carbon interface coatings. The model assumes that microcracking, which is due to low matrix toughness, initiates and arrests continuously. The model-predicted fracture behavior compares well with the experimental results.

Original language	English
Pages (from-to)	49-58
Number of pages	10
Journal	Materials Science and Engineering: A
Volume	317
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-5093(01)01184-4
State	Published - Oct 31 2001

Funding

The authors would like to thank R.A. Lowden, J.C. Mclaughlin, N.L. Vaughn, O.J. Schwarz, D.P. Stinton, and T.M. Besmann for their invaluable help in conducting this research. This research was performed in cooperation with the University of Tennessee, Knoxville, under contract 11X-SN191V with Lockheed-Martin Energy Research Corporation and is sponsored by the US Department of Energy, Assistant Secretary for Conservation and Renewable Energy, Office of Industrial Technology, Industrial Energy Division, under contract DE-AC05-84OR21400 with Lockheed-Martin Energy Research Corporation. P.K. Liaw is very grateful for the financial support of National Science Foundation (DMI-9724476 and EEC-9527527) with Dr D.R. Durham and M.F. Poats, as contract monitors, respectively.

Funders	Funder number
Assistant Secretary for Conservation and Renewable Energy
Lockheed-Martin Energy Research Corporation
Office of Industrial Technology, Industrial Energy Division	DE-AC05-84OR21400
National Science Foundation	DMI-9724476, EEC-9527527
U.S. Department of Energy
University of Tennessee

Keywords

Ceramic composites
Coating thickness
Fiber
Fracture
Interface
Silicon carbide

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10.1016/S0921-5093(01)01184-4

Cite this

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title = "Influence of fiber coating thickness on fracture behavior of continuous woven Nicalon{\textregistered} fabric-reinforced silicon-carbide matrix ceramic composites",

abstract = "Nicalon{\textregistered} plain-weave fiber fabric-reinforced silicon carbide (SiC) matrix composites with various pyrolytic carbon fiber/matrix interface coating thicknesses have been successfully fabricated by forced chemical vapor infiltration (FCVI) methods. The influence of the carbon interface coating thickness on the fracture behavior of these fiber fabric-reinforced SiC composites has been investigated. Experimental results indicate that fiber coating thickness significantly alters the fracture behavior of SiC composites. The fracture strength exhibits a maximum as the coating thickness increases. A theoretical model has been developed to simulate the fracture behavior in the SiC composites with varied carbon interface coatings. The model assumes that microcracking, which is due to low matrix toughness, initiates and arrests continuously. The model-predicted fracture behavior compares well with the experimental results.",

keywords = "Ceramic composites, Coating thickness, Fiber, Fracture, Interface, Silicon carbide",

author = "Miller, {J. H.} and Liaw, {P. K.} and Landes, {J. D.}",

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T1 - Influence of fiber coating thickness on fracture behavior of continuous woven Nicalon® fabric-reinforced silicon-carbide matrix ceramic composites

AU - Miller, J. H.

AU - Liaw, P. K.

AU - Landes, J. D.

PY - 2001/10/31

Y1 - 2001/10/31

N2 - Nicalon® plain-weave fiber fabric-reinforced silicon carbide (SiC) matrix composites with various pyrolytic carbon fiber/matrix interface coating thicknesses have been successfully fabricated by forced chemical vapor infiltration (FCVI) methods. The influence of the carbon interface coating thickness on the fracture behavior of these fiber fabric-reinforced SiC composites has been investigated. Experimental results indicate that fiber coating thickness significantly alters the fracture behavior of SiC composites. The fracture strength exhibits a maximum as the coating thickness increases. A theoretical model has been developed to simulate the fracture behavior in the SiC composites with varied carbon interface coatings. The model assumes that microcracking, which is due to low matrix toughness, initiates and arrests continuously. The model-predicted fracture behavior compares well with the experimental results.

AB - Nicalon® plain-weave fiber fabric-reinforced silicon carbide (SiC) matrix composites with various pyrolytic carbon fiber/matrix interface coating thicknesses have been successfully fabricated by forced chemical vapor infiltration (FCVI) methods. The influence of the carbon interface coating thickness on the fracture behavior of these fiber fabric-reinforced SiC composites has been investigated. Experimental results indicate that fiber coating thickness significantly alters the fracture behavior of SiC composites. The fracture strength exhibits a maximum as the coating thickness increases. A theoretical model has been developed to simulate the fracture behavior in the SiC composites with varied carbon interface coatings. The model assumes that microcracking, which is due to low matrix toughness, initiates and arrests continuously. The model-predicted fracture behavior compares well with the experimental results.

KW - Ceramic composites

KW - Coating thickness

KW - Fiber

KW - Fracture

KW - Interface

KW - Silicon carbide

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Influence of fiber coating thickness on fracture behavior of continuous woven Nicalon® fabric-reinforced silicon-carbide matrix ceramic composites

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