VARIATION OF ALUMINUM CONCENTRATION IN BETA'-SIALON GRAINS FORMED DURING LIQUID-PHASE SINTERING OF SI3N4-AL2O3-ND2O3

Authors
KIM NK KIM DY KRANZMANN A BISCHOFF E KANG SJL
Citation
Nk. Kim et al., VARIATION OF ALUMINUM CONCENTRATION IN BETA'-SIALON GRAINS FORMED DURING LIQUID-PHASE SINTERING OF SI3N4-AL2O3-ND2O3, Journal of Materials Science, 28(16), 1993, pp. 4355-4358
Citations number
20
Categorie Soggetti
Material Science
Journal title
Journal of Materials Science → ACNP
ISSN journal
00222461
Volume
28
Issue
16
Year of publication
1993
Pages
4355 - 4358
Database
ISI
SICI code
0022-2461(1993)28:16<4355:VOACIB>2.0.ZU;2-8
Abstract
The aluminium concentration in beta'-sialon grains of the 74Si3N4 (alp ha)-6Al2O3-20Nd2O3 (Wt %) specimen has been determined. As the alpha-b eta' transformation proceeded, the average aluminium concentration in beta'-sialon grains decreased. For individual beta' grains, the alumin ium concentration at the centre was higher than that at the edge. The observed variation of aluminium concentration has been explained in te rms of the compositional change of the liquid matrix during sintering.