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Liquid‐Phase Growth of Small Crystals for Seeding α‐SiAlON Ceramics
Author(s) -
Zenotchkine M.,
Shuba R.,
Chen IWei
Publication year - 2004
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.1551-2916.2004.01040.x
Subject(s) - sialon , nucleation , seeding , materials science , sintering , ceramic , phase (matter) , chemical engineering , seed crystal , crystal growth , grain growth , morphology (biology) , mineralogy , grain size , analytical chemistry (journal) , composite material , crystallography , single crystal , chemistry , chromatography , thermodynamics , organic chemistry , physics , engineering , genetics , biology
Single‐phase small crystals of Li‐, Mg‐, Ca‐, Y‐, Nd‐, and Yb‐α‐SiAlONs have been obtained by liquid‐phase sintering for various compositions and processing conditions. These crystals are suitable for seeding grain growth in α‐SiAlON ceramics. The influence of chemical and processing parameters (starting composition and powders, green density, liquid content, heating schedule, nitrogen pressure, and temperature) on the size and morphology of seed crystals has been investigated. The results are compared with those for β‐Si 3 N 4 crystal formation, and the differences are discussed in terms of nucleation and growth kinetics during liquid‐phase sintering.