TY - JOUR
T1 - Dry and wet oxidation of Y-α-SiAlON powder at 1000°-1300°C
AU - Kiyono, H.
AU - Aketo, T.
AU - Watanuki, H.
AU - Shimada, S.
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2003
Y1 - 2003
N2 - Oxidation of Y-α-sialon powder was investigated in and Ar/O2 (dry) and Ar/O2/H2O (wet) atmospheres at the temperature range 1000° ∼ 1300°C. Oxidation products were identified by X-ray powder diffraction, 29Si magic angle spinning nuclear magnetic resonance and transmission electron microscope. The weight change by isothermal oxidation was followed by thermogravimetry. Oxidation product was composed of mullite, y-Y2Si2O7 and amorphous SiO2 in both atmospheres. Amorphous SiO2 is crystallized to cristobalite at 1300°C in the wet atmosphere. The weight changes were represented by the first order reaction equation. The rate constants for oxidation were greater 4 ∼ 10 times in the wet atmosphere than in the dry atmosphere.
AB - Oxidation of Y-α-sialon powder was investigated in and Ar/O2 (dry) and Ar/O2/H2O (wet) atmospheres at the temperature range 1000° ∼ 1300°C. Oxidation products were identified by X-ray powder diffraction, 29Si magic angle spinning nuclear magnetic resonance and transmission electron microscope. The weight change by isothermal oxidation was followed by thermogravimetry. Oxidation product was composed of mullite, y-Y2Si2O7 and amorphous SiO2 in both atmospheres. Amorphous SiO2 is crystallized to cristobalite at 1300°C in the wet atmosphere. The weight changes were represented by the first order reaction equation. The rate constants for oxidation were greater 4 ∼ 10 times in the wet atmosphere than in the dry atmosphere.
KW - Nucleation Limiting-Rate
KW - Oxidation
KW - Powder
KW - Water Vapor
KW - Y-α-SiAlON
UR - http://www.scopus.com/inward/record.url?scp=0037272252&partnerID=8YFLogxK
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U2 - 10.4028/www.scientific.net/kem.237.227
DO - 10.4028/www.scientific.net/kem.237.227
M3 - Conference article
AN - SCOPUS:0037272252
SN - 1013-9826
VL - 237
SP - 227
EP - 232
JO - Key Engineering Materials
JF - Key Engineering Materials
T2 - Proceedings of the International Symposium on SiAlONs
Y2 - 2 December 2001 through 4 December 2001
ER -