Journal Article

IMPULSE-2017-00053

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Coupling between creep and redox behavior in nickel - yttria stabilized zirconia observed in-situ by monochromatic neutron imaging

Makowska, M. G. ; Kuhn, L. T. ; Frandsen, H. L. ; Lauridsen, E. M. ; De Angelis, S. ; Cleemann, L. N. ; Morgano, M. ; Trtik, P. ; Strobl, M.MLZ*

2017
Elsevier New York, NY [u.a.]

Please use a persistent id in citations: doi:10.1016/j.jpowsour.2016.11.059

Abstract: Ni-YSZ (nickel - yttria stabilized zirconia) is a material widely used for electrodes and supports in solidoxide electrochemical cells. The mechanical and electrochemical performance of these layers, and thusthe whole cell, depends on their microstructure. During the initial operation of a cell, NiO is reduced toNi. When this process is conducted under external load, like also present in a stack assembly, significantdeformations of NiO/Ni-YSZ composite samples are observed. The observed creep is orders of magnitudelarger than the one observed after reduction during operation. This phenomenon is referred to asaccelerated creep and is expected to have a significant influence on the microstructure development andstress field present in the Ni-YSZ in solid oxide electrochemical cells (SOCs), which is highly important forthe durability of the SOC. In this work we present energy selective neutron imaging studies of theaccelerated creep phenomenon in Ni/NiO-YSZ composite during reduction and also during oxidation.This approach allowed us to observe the phase transition and the creep behavior simultaneously in-situunder SOC operation-like conditions.

Keyword(s): Energy (1st) ; Materials Science (2nd)

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Contributing Institute(s):

1. DOMUSER
2. NECTAR
3. ANTARES

Experiment(s):

1. Measurement at external facility

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Database coverage:
; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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