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
N1 - Publisher Copyright:
© 2017 Institute of Materials, Minerals and Mining Published by Taylor & Francis on behalf of the Institute.
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 -