Investigating the effect of thermal gradients on stress in solid oxide fuel cell anodes using combined synchrotron radiation and thermal imaging

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Title: Investigating the effect of thermal gradients on stress in solid oxide fuel cell anodes using combined synchrotron radiation and thermal imaging
Author(s): Robinson, JB
Brown, LD
Jervis, R
Taiwo, OO
Heenan, TMM
Millichamp, J
Mason, TJ
Neville, TP
Clague, R
Eastwood, DS
Reinhard, C
Lee, PD
Brett, DJL
Shearing, PR
Item Type: Journal Article
Abstract: Thermal gradients can arise within solid oxide fuel cells (SOFCs) due to start-up and shut-down, non-uniform gas distribution, fast cycling and operation under internal reforming conditions. Here, the effects of operationally relevant thermal gradients on Ni/YSZ SOFC anode half cells are investigated using combined synchrotron X-ray diffraction and thermal imaging. The combination of these techniques has identified significant deviation from linear thermal expansion behaviour in a sample exposed to a one dimensional thermal gradient. Stress gradients are identified along isothermal regions due to the presence of a proximate thermal gradient, with tensile stress deviations of up to 75 MPa being observed across the sample at a constant temperature. Significant strain is also observed due to the presence of thermal gradients when compared to work carried out at isothermal conditions.
Publication Date: 9-May-2015
Date of Acceptance: 16-Apr-2015
URI: http://hdl.handle.net/10044/1/44207
DOI: https://dx.doi.org/10.1016/j.jpowsour.2015.04.104
ISSN: 1873-2755
Publisher: Elsevier
Start Page: 473
End Page: 481
Journal / Book Title: Journal of Power Sources
Volume: 288
Issue: 2015
Copyright Statement: © 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ )
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Electrochemistry
Energy & Fuels
Materials Science, Multidisciplinary
Chemistry
Materials Science
X-ray diffraction
Solid oxide fuel cell
Infrared imaging
Thermal imaging
Stress analysis
Synchrotron radiation
RED-OX CYCLE
RESIDUAL-STRESSES
MECHANICAL-PROPERTIES
FINITE-ELEMENT
STEADY-STATE
SOFC ANODE
PROBABILITY
TEMPERATURE
BEHAVIOR
FAILURE
Energy
09 Engineering
03 Chemical Sciences
Publication Status: Published
Appears in Collections:Faculty of Engineering
Materials



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