Effect of microstructure and grain boundary chemistry on slow crack growth in silicon carbide at ambient conditions
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
Silicon carbide (SiC) is being used increasingly as a room temperature structural material in environments where moisture cannot always be excluded. Unfortunately, there have been almost no reports on slow crack growth (SCG) in SiC at room temperature. To address this gap, SCG in SiC was studied using constant stress rate and double torsion tests in water. SiC based materials were produced with a wide range of grain boundary chemistries and microstructures, which may affect their slow crack growth behaviour. To clarify the role of chemistry and microstructure respectively, solid state (SS) sintering with carbon and boron along with liquid phase (LP) sintering using oxides additives were used to produce materials with fine and coarse grains. The LP-SiC was three times more sensitive to SCG than SS-SiC materials. Moreover, the larger grained material with a higher toughness was less sensitive to SCG than the materials with fine grains.
Date Issued
2015-08-01
Date Acceptance
2015-02-19
Citation
Journal of the European Ceramic Society, 2015, 35 (8), pp.2253-2260
ISSN
0955-2219
Publisher
Elsevier
Start Page
2253
End Page
2260
Journal / Book Title
Journal of the European Ceramic Society
Volume
35
Issue
8
Copyright Statement
© 2015 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000353254100005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
EP/F033605/1
Subjects
Science & Technology
Technology
Materials Science, Ceramics
Materials Science
Slow crack growth
SiC
Toughness
Grain morphology
MECHANICAL-PROPERTIES
FRACTURE-TOUGHNESS
DYNAMIC FATIGUE
BEHAVIOR
CERAMICS
GLASSES
PHASE
PROPAGATION
STRENGTH
0912 Materials Engineering
Materials
Publication Status
Published
Date Publish Online
2015-03-05