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Heterogeneous Nucleation in the Intergranular Phase of a SiAlON

Szabo, D. V. ORCID iD icon; Campbell, G. H.; Brulely, J.; Hoffmann, M. J.; Ruhle, M.


A SiAlON ceramic with yttria as a sintering aid has been fabricated and
subjected to a 1-h heat treatment at 1150-degrees-C.Microstructural
characterization by analytical electron microscopy and diffraction
analysis indicates that the residual intergranular phase crystallizes
into a metastable hexagonal phase (Y2SiAlO5N) and mullite.The mullite
appears as a characteristically shaped precipitate forming with a
definite orientation relationship on the (1010BAR) facets of SiAlON
grains.The absence of a residual amorphous film between the
precipitate and the SiAlON indicates that the precipitation occurred in
a heterogeneous manner on the surface of the SiAlON.

DOI: 10.1111/j.1151-2916.1992.tb05479.x
Zitationen: 7
Zitationen: 8
Zugehörige Institution(en) am KIT Fakultät für Maschinenbau – Institut für Keramik im Maschinenbau (IKM)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 1992
Sprache Englisch
Identifikator ISSN: 0002-7820, 1551-2916
KITopen-ID: 1000007799
Erschienen in Journal of the American Ceramic Society
Verlag American Ceramic Society
Band 75
Heft 1
Seiten 249-252
Nachgewiesen in Dimensions
Web of Science
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