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Article: Analysis of toughening mechanisms of ZrO2/nano-SiC ceramic composites

TitleAnalysis of toughening mechanisms of ZrO2/nano-SiC ceramic composites
Authors
Issue Date2004
PublisherSage Science Press (UK). The Journal's web site is located at http://www.sagepub.co.uk/journal.aspx?pid=105625
Citation
Journal Of Composite Materials, 2004, v. 38 n. 3, p. 227-241 How to Cite?
AbstractThree effects of nano-particles on the toughness of nano-composite ceramics, namely, nano-particle clustering, crack pinning, and transgranular fracture, are identified from both the experimental and analytical studies. It is found that crack pinning toughens the nano-composite ceramics because a higher stress intensity factor is needed to cause crack propagation around or pull-out of the nano-particle. The nano-particle along the grain boundary steers the crack into the matrix grain due to the strong cohesion between the nano-particle and the matrix. Transgranular fracture increases with the increase of the volume fraction of nano-particles. Since the fracture resistance of the grain boundary is lower than that of the grain lattice, the higher the probability of transgranular fracture induced by nano-particles, the tougher is the nano-composite. Nano-particle clustering, which increases with increasing volume fraction of nano-particles, leads to the reduction of both the strength and toughness of the nano-composite ceramics. The larger the size of the clustered particle, the more defects it contains and, thus, the easier it is for the crack to pass through the clustered particle. That is, the nano-particle clustering can reduce toughening induced by crack pinning. The theoretical prediction, based on the combination of the three effects of nano-particles, is in agreement with the experimental data.
Persistent Identifierhttp://hdl.handle.net/10722/156734
ISSN
2015 Impact Factor: 1.242
2015 SCImago Journal Rankings: 0.604
References

 

DC FieldValueLanguage
dc.contributor.authorSoh, AKen_US
dc.contributor.authorFang, DNen_US
dc.contributor.authorDong, ZXen_US
dc.date.accessioned2012-08-08T08:43:45Z-
dc.date.available2012-08-08T08:43:45Z-
dc.date.issued2004en_US
dc.identifier.citationJournal Of Composite Materials, 2004, v. 38 n. 3, p. 227-241en_US
dc.identifier.issn0021-9983en_US
dc.identifier.urihttp://hdl.handle.net/10722/156734-
dc.description.abstractThree effects of nano-particles on the toughness of nano-composite ceramics, namely, nano-particle clustering, crack pinning, and transgranular fracture, are identified from both the experimental and analytical studies. It is found that crack pinning toughens the nano-composite ceramics because a higher stress intensity factor is needed to cause crack propagation around or pull-out of the nano-particle. The nano-particle along the grain boundary steers the crack into the matrix grain due to the strong cohesion between the nano-particle and the matrix. Transgranular fracture increases with the increase of the volume fraction of nano-particles. Since the fracture resistance of the grain boundary is lower than that of the grain lattice, the higher the probability of transgranular fracture induced by nano-particles, the tougher is the nano-composite. Nano-particle clustering, which increases with increasing volume fraction of nano-particles, leads to the reduction of both the strength and toughness of the nano-composite ceramics. The larger the size of the clustered particle, the more defects it contains and, thus, the easier it is for the crack to pass through the clustered particle. That is, the nano-particle clustering can reduce toughening induced by crack pinning. The theoretical prediction, based on the combination of the three effects of nano-particles, is in agreement with the experimental data.en_US
dc.languageengen_US
dc.publisherSage Science Press (UK). The Journal's web site is located at http://www.sagepub.co.uk/journal.aspx?pid=105625en_US
dc.relation.ispartofJournal of Composite Materialsen_US
dc.titleAnalysis of toughening mechanisms of ZrO2/nano-SiC ceramic compositesen_US
dc.typeArticleen_US
dc.identifier.emailSoh, AK:aksoh@hkucc.hku.hken_US
dc.identifier.authoritySoh, AK=rp00170en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1177/0021998304038646-
dc.identifier.scopuseid_2-s2.0-1342282322en_US
dc.identifier.hkuros88993-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-1342282322&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume38en_US
dc.identifier.issue3en_US
dc.identifier.spage227en_US
dc.identifier.epage241en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridSoh, AK=7006795203en_US
dc.identifier.scopusauthoridFang, DN=7202133612en_US
dc.identifier.scopusauthoridDong, ZX=7402274414en_US

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