TY - JOUR
T1 - High-temperature alkali corrosion of Kyocera SN282 silicon nitride
AU - Jordache, Madeleine Kant
AU - Du, Henry
N1 - Publisher Copyright:
© 2014 Elsevier Ltd.
PY - 2015/2/1
Y1 - 2015/2/1
N2 - The role of Cs in corrosion of SN282 Si3N4 with 5.35wt.% Lu2O3 was examined at 1200°C for up to 20h in oxygen with 220ppm CsNO3 to determine particulars of SN282 corrosion under Cs, and high-temperature Cs+ behavior in glass silicate hosting 137Cs. Cs accelerates SN282 oxidation. The pronounced adverse effect of Cs on Si3N4 corrosion resistance is predicted thermodynamically more strongly for SiO2 dissolution in Cs silicate than in other alkali silicates. While oxidation kinetics remained parabolic, Cs oxide layers were thick, uneven, heterogeneous and cracked.
AB - The role of Cs in corrosion of SN282 Si3N4 with 5.35wt.% Lu2O3 was examined at 1200°C for up to 20h in oxygen with 220ppm CsNO3 to determine particulars of SN282 corrosion under Cs, and high-temperature Cs+ behavior in glass silicate hosting 137Cs. Cs accelerates SN282 oxidation. The pronounced adverse effect of Cs on Si3N4 corrosion resistance is predicted thermodynamically more strongly for SiO2 dissolution in Cs silicate than in other alkali silicates. While oxidation kinetics remained parabolic, Cs oxide layers were thick, uneven, heterogeneous and cracked.
KW - A. Ceramic
KW - A. Glass
KW - A. Rare earth elements
KW - C. Alkaline corrosion
KW - C. High temperature corrosion
KW - C. Oxidation
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U2 - 10.1016/j.corsci.2014.10.050
DO - 10.1016/j.corsci.2014.10.050
M3 - Article
AN - SCOPUS:84916241279
SN - 0010-938X
VL - 91
SP - 68
EP - 74
JO - Corrosion Science
JF - Corrosion Science
ER -