Crack healing in liquid-phase-pressureless-sintered silicon carbide-aluminum nitride composites

TitleCrack healing in liquid-phase-pressureless-sintered silicon carbide-aluminum nitride composites
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2010
AuthorsMagnani, G., Beaulardi L., Brentari A., Toyoda T., and Takahashi K.
JournalJournal of the European Ceramic Society
Volume30
Pagination769-773
ISSN09552219
KeywordsAlN, Aluminum, Aluminum nitride, Crack healing, Cracks, Healing temperature, Liquid Phase, Liquids, Mechanical properties, Mullite, Nitrides, oxidation, Oxidation heat, Pressureless-sintered, SiC, Silica, Silicate minerals, Silicon carbide, Sintered carbides, Sintering
Abstract

Crack healing in liquid-phase-pressureless-sintered SiC-AlN composites was investigated by introducing cracks into specimens and subsequently heat-treating the specimens. It was observed that cracks were healed and the strength was recovered. Cracks were filled with silica or mullite produced by the oxidation of the composites. It was shown that the healing temperature could be fixed in the range 1100-1300 °C and that large cracks up to about 300 μm could be healed completely. Our results imply that a simple oxidation heat-treatment can improve the reliability of silicon carbide-aluminum nitride components. © 2009 Elsevier Ltd. All rights reserved.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-70449520108&doi=10.1016%2fj.jeurceramsoc.2009.08.002&partnerID=40&md5=cfe5cf8d05ee465f363199bd4f051f0c
DOI10.1016/j.jeurceramsoc.2009.08.002