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Enhanced Crystallization of a Glassy Phase in Silicon Nitride by the Addition of Scandia
Author(s) -
Mecartney Martha L.
Publication year - 1987
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1987.tb04926.x
Subject(s) - crystallization , crystallite , materials science , dissolution , phase (matter) , silicon nitride , grain boundary , nitride , silicon , mineralogy , chemical engineering , crystallography , microstructure , composite material , metallurgy , chemistry , organic chemistry , layer (electronics) , engineering
A Sc 2 O 3 ‐MgO‐Al 2 O 3 ‐SiO 2 melt reacted with bulk pieces of hot‐pressed Si 3 N 4 , dissolving Si 3 N 4 at the surface and penetrating into the interior via the grain boundaries. During subsequent cooling, the glass phase in the Si 3 N 4 easily crystallized and fine crystallites were formed, but no phase separation was observed. This behavior contrasts strongly with that observed for a similar melt reaction without Sc 2 O 3 .