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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/19966

Title: Fabrication of three-dimensional wavy single chamber solid oxide fuel cell by in situ observation of curvature evolution
Authors: Choi, Indae
Ranaweera, Manoj Prasanna
Kim, Jung-Sik
Issue Date: 2015
Publisher: Wiley / © American Ceramic Society
Citation: CHOI, I., RANAWEERA, M. and KIM, J.-S., 2015.Fabrication of three-dimensional wavy single chamber solid oxide fuel cell by in situ observation of curvature evolution. Journal of the American Ceramic Society, 99 (4), pp. 1174-1173.
Abstract: This study presents a fabrication process via experimental observations for curved porous multi-layer structures with a single step, co-sintering operation. Active monitoring the shrinkage behaviour of each porous layer during the co-sintering process leads to minimise mismatched stresses along with avoidance of severe warping and cracking. During co-sintering, in-plane stresses are developed in each layer due to differing shrinkage behaviours between layers. Analysis of curvature evolution using in-situ monitoring of the structure was performed in the design of a curved multi-layer structure via the co-sintering process. Materials used are NiO/CGO for anode; CGO for electrolyte; and LSCF for cathode. These materials are tape-casted with 207m thickness and stacked to form bi- and triple-layer structures by hot pressing. Bi-layers, consisting of NiO/CGO-CGO and CGO-LSCF, were co-sintered up to 1200°C. The maximum sintering mismatched stress was calculated at the interface of bi-layer structure. In-situ observation, to monitor the shrinkage of each material and the curvature evolution of the bi- and triple-layer structures, was performed using a long focus microscope (Infinity K-2). Thereby, viscosity, shrinkage rate of each material and curvature rate were calculated to determine the mismatched stresses. The monitored results contributed to development of novel design of curved 3D multi-layer structures during co-sintering.
Description: This paper is in closed access until 10th Jan 2017.
Version: Accepted for publication
DOI: 10.1111/jace.14090
URI: https://dspace.lboro.ac.uk/2134/19966
Publisher Link: http://dx.doi.org/10.1111/jace.14090
ISSN: 1551-2916
Appears in Collections:Closed Access (Aeronautical and Automotive Engineering)

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