Hot corrosion behaviour of 7YSZ + Gd2O3 nano-composites in molten salts prepared by spark plasma sintering

Cuauhtémoc Flores Ferreyra; Angel de Jesus Morales Ramirez; Hugo Martinez Gutierrez; Fernando Juarez Lopez

doi:10.1080/1478422X.2016.1255370

Hot corrosion behaviour of 7YSZ + Gd₂O₃ nano-composites in molten salts prepared by spark plasma sintering

Cuauhtémoc Flores Ferreyra, Angel de Jesus Morales Ramirez, Hugo Martinez Gutierrez, Fernando Juarez Lopez

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

2 Scopus citations

Abstract

This study compares the hot corrosion performance of yttria-stabilised zirconia (7YSZ), and 7YSZ + Gd₂O₃ composite samples in the presence of molten mixture of Na₂SO₄ + V₂O₅ at 1150°C. For 7YSZ, the reaction between NaVO₃ and Y₂O₃ produces YVO₄ and leads the transformation of tetragonal ZrO₂ to monoclinic ZrO₂. A high-density in sintered 7YSZ + Gd₂O₃ samples, led minor amounts of monoclinic ZrO₂ and tetragonal GdVO₄ as the hot corrosion products with only traceable amounts of YVO₄, and a stable corroded layer was formed. Due to the synergic effect of doping of zirconia with Gd₂O₃, the 7YSZ + Gd₂O₃ sample has a much better hot corrosion crack resistance than 7YSZ.

Original language	English
Pages (from-to)	236-243
Number of pages	8
Journal	Corrosion Engineering Science and Technology
Volume	52
Issue number	3
DOIs	https://doi.org/10.1080/1478422X.2016.1255370
State	Published - 3 Apr 2017

Keywords

Corrosion
Gadolinia
composite
yttria-stabilised-zirconia

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10.1080/1478422X.2016.1255370

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title = "Hot corrosion behaviour of 7YSZ + Gd2O3 nano-composites in molten salts prepared by spark plasma sintering",

abstract = "This study compares the hot corrosion performance of yttria-stabilised zirconia (7YSZ), and 7YSZ + Gd2O3 composite samples in the presence of molten mixture of Na2SO4 + V2O5 at 1150°C. For 7YSZ, the reaction between NaVO3 and Y2O3 produces YVO4 and leads the transformation of tetragonal ZrO2 to monoclinic ZrO2. A high-density in sintered 7YSZ + Gd2O3 samples, led minor amounts of monoclinic ZrO2 and tetragonal GdVO4 as the hot corrosion products with only traceable amounts of YVO4, and a stable corroded layer was formed. Due to the synergic effect of doping of zirconia with Gd2O3, the 7YSZ + Gd2O3 sample has a much better hot corrosion crack resistance than 7YSZ.",

keywords = "Corrosion, Gadolinia, composite, yttria-stabilised-zirconia",

author = "Ferreyra, {Cuauht{\'e}moc Flores} and Ramirez, {Angel de Jesus Morales} and {Martinez Gutierrez}, Hugo and {Juarez Lopez}, Fernando",

note = "Publisher Copyright: {\textcopyright} 2017 Institute of Materials, Minerals and Mining Published by Taylor & Francis on behalf of the Institute.",

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doi = "10.1080/1478422X.2016.1255370",

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AU - Ferreyra, Cuauhtémoc Flores

AU - Ramirez, Angel de Jesus Morales

AU - Martinez Gutierrez, Hugo

AU - Juarez Lopez, Fernando

PY - 2017/4/3

Y1 - 2017/4/3

N2 - This study compares the hot corrosion performance of yttria-stabilised zirconia (7YSZ), and 7YSZ + Gd2O3 composite samples in the presence of molten mixture of Na2SO4 + V2O5 at 1150°C. For 7YSZ, the reaction between NaVO3 and Y2O3 produces YVO4 and leads the transformation of tetragonal ZrO2 to monoclinic ZrO2. A high-density in sintered 7YSZ + Gd2O3 samples, led minor amounts of monoclinic ZrO2 and tetragonal GdVO4 as the hot corrosion products with only traceable amounts of YVO4, and a stable corroded layer was formed. Due to the synergic effect of doping of zirconia with Gd2O3, the 7YSZ + Gd2O3 sample has a much better hot corrosion crack resistance than 7YSZ.

AB - This study compares the hot corrosion performance of yttria-stabilised zirconia (7YSZ), and 7YSZ + Gd2O3 composite samples in the presence of molten mixture of Na2SO4 + V2O5 at 1150°C. For 7YSZ, the reaction between NaVO3 and Y2O3 produces YVO4 and leads the transformation of tetragonal ZrO2 to monoclinic ZrO2. A high-density in sintered 7YSZ + Gd2O3 samples, led minor amounts of monoclinic ZrO2 and tetragonal GdVO4 as the hot corrosion products with only traceable amounts of YVO4, and a stable corroded layer was formed. Due to the synergic effect of doping of zirconia with Gd2O3, the 7YSZ + Gd2O3 sample has a much better hot corrosion crack resistance than 7YSZ.

KW - Corrosion

KW - Gadolinia

KW - composite

KW - yttria-stabilised-zirconia

UR - http://www.scopus.com/inward/record.url?scp=85012081800&partnerID=8YFLogxK

U2 - 10.1080/1478422X.2016.1255370

DO - 10.1080/1478422X.2016.1255370

M3 - Artículo

SN - 1478-422X

VL - 52

SP - 236

EP - 243

JO - Corrosion Engineering Science and Technology

JF - Corrosion Engineering Science and Technology

IS - 3

ER -

Hot corrosion behaviour of 7YSZ + Gd₂O₃ nano-composites in molten salts prepared by spark plasma sintering

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