High-temperature alkali corrosion of Kyocera SN282 silicon nitride

Madeleine Kant Jordache; Henry Du

doi:10.1016/j.corsci.2014.10.050

High-temperature alkali corrosion of Kyocera SN282 silicon nitride

Madeleine Kant Jordache
, Henry Du

Stevens Institute of Technology

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	68-74
Number of pages	7
Journal	Corrosion Science
Volume	91
DOIs	https://doi.org/10.1016/j.corsci.2014.10.050
State	Published - 1 Feb 2015

Keywords

A. Ceramic
A. Glass
A. Rare earth elements
C. Alkaline corrosion
C. High temperature corrosion
C. Oxidation

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10.1016/j.corsci.2014.10.050

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title = "High-temperature alkali corrosion of Kyocera SN282 silicon nitride",

abstract = "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.",

keywords = "A. Ceramic, A. Glass, A. Rare earth elements, C. Alkaline corrosion, C. High temperature corrosion, C. Oxidation",

author = "Jordache, \{Madeleine Kant\} and Henry Du",

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doi = "10.1016/j.corsci.2014.10.050",

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AU - Jordache, Madeleine Kant

AU - Du, Henry

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

UR - https://www.scopus.com/pages/publications/84916241279

UR - https://www.scopus.com/pages/publications/84916241279#tab=citedBy

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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 -

High-temperature alkali corrosion of Kyocera SN282 silicon nitride

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Keywords

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