KIT | KIT-Bibliothek | Impressum | Datenschutz

Effect of intergranular glass on phase relation of Nd-alpha-sialon

Zhu, B.; Gu, H.; Holzer, S.; Hoffmann, M. J.

Abstract:
Quantitative analytical electron microscopy study of dopant
distribution in the rnicrostructure of selected Nd-alpha-sialon samples
revealed the presence of relatively large amounts of glassy phase at
quadruple pockets, which exhibited a common composition similar to a
melilite solution. Al segregants were depleted from adjacent grain
boundaries to satisfy the "stoichiometry" of such glass. Existence of
this glass results in significant deviation of the Nd-alpha-sialon
composition from the expected values, which shifts the
alpha-beta-sialon phase boundary. Only extra Nd2O3 additives enable a
monolithic alpha-sialon microstructure. The absence of similar glass in
Yb-alpha-sialon materials keeps the phase relations from such
deviations.


Zugehörige Institution(en) am KIT Institut für Keramik im Maschinenbau (IKM)
Publikationstyp Zeitschriftenaufsatz
Jahr 2006
Sprache Englisch
Identifikator ISSN: 1359-6462
KITopen ID: 1000007615
Erschienen in Scripta Materialia
Band 54
Heft 8
Seiten 1469-1473
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft KITopen Landing Page