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

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

2 Citas (Scopus)

Resumen

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.

Idioma original	Inglés
Páginas (desde-hasta)	236-243
Número de páginas	8
Publicación	Corrosion Engineering Science and Technology
Volumen	52
N.º	3
DOI	https://doi.org/10.1080/1478422X.2016.1255370
Estado	Publicada - 3 abr. 2017

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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.",

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

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Hot corrosion behaviour of 7YSZ + Gd₂O₃ nano-composites in molten salts prepared by spark plasma sintering. / Ferreyra, Cuauhtémoc Flores; Ramirez, Angel de Jesus Morales ; Martinez Gutierrez, Hugo et al.
En: Corrosion Engineering Science and Technology, Vol. 52, N.º 3, 03.04.2017, p. 236-243.

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

TY - JOUR

T1 - Hot corrosion behaviour of 7YSZ + Gd2O3 nano-composites in molten salts prepared by spark plasma sintering

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

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DO - 10.1080/1478422X.2016.1255370

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JO - Corrosion Engineering Science and Technology

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