TY - JOUR
T1 - The Cr-Doped Ni-YSZ(111) interface: Segregation, oxidation and the Ni equilibrium crystal shape
T2 - Segregation, oxidation and the Ni equilibrium crystal shape
AU - Nahor, Hadar
AU - Kauffmann, Yaron
AU - Kaplan, Wayne D.
N1 - Funding Information: The authors would like to acknowledge Hadas Sternlicht for her assistance with the TEM sample preparation of the standard. This research was partially supported by the Israel Science Foundation (grant 381/14 ). Publisher Copyright: © 2018 Acta Materialia Inc.
PY - 2019/3/1
Y1 - 2019/3/1
N2 - In this work we studied the influence of Cr, as well as Fe combined with Cr, on the thermodynamics and structural characteristics of equilibrated interfaces between Ni and the (111) surface of yttrium stabilized ZrO2 (YSZ). Ni particles were doped with Cr, or with Fe and Cr. Chemical analysis of the interfaces was conducted using energy dispersive spectroscopy (EDS) in scanning transmission electron microscopy (STEM), and the equilibrium crystal shapes (ECS) were simulated using the “Wulffmaker” software. Cr was found to adsorb to the Ni-YSZ interface, and in parallel to create a Cr2O3 phase which partially wets the interface. The presence of Fe in solution in the Ni was found to reduce the amount of adsorption to the interface and prevent formation of Cr2O3. Furthermore, in both doped systems, the same orientation relationship as in the un-doped system was found, regardless of the significant change in the equilibrium crystal shape.
AB - In this work we studied the influence of Cr, as well as Fe combined with Cr, on the thermodynamics and structural characteristics of equilibrated interfaces between Ni and the (111) surface of yttrium stabilized ZrO2 (YSZ). Ni particles were doped with Cr, or with Fe and Cr. Chemical analysis of the interfaces was conducted using energy dispersive spectroscopy (EDS) in scanning transmission electron microscopy (STEM), and the equilibrium crystal shapes (ECS) were simulated using the “Wulffmaker” software. Cr was found to adsorb to the Ni-YSZ interface, and in parallel to create a Cr2O3 phase which partially wets the interface. The presence of Fe in solution in the Ni was found to reduce the amount of adsorption to the interface and prevent formation of Cr2O3. Furthermore, in both doped systems, the same orientation relationship as in the un-doped system was found, regardless of the significant change in the equilibrium crystal shape.
KW - Adsorption
KW - Dewetting
KW - Equilibrium crystal shape
KW - Interface
KW - YSZ
UR - https://www.mendeley.com/catalogue/522e9a68-f062-322d-8d43-5fed8aacfe5e/
UR - http://www.scopus.com/inward/record.url?scp=85058631884&partnerID=8YFLogxK
U2 - 10.1016/j.actamat.2018.12.023
DO - 10.1016/j.actamat.2018.12.023
M3 - Article
SN - 1359-6454
VL - 166
SP - 28
EP - 36
JO - Acta Materialia
JF - Acta Materialia
ER -