Imperial College London
Alternate

ProfessorJohnKilner

Faculty of Engineering, Department of Materials

Senior Research Investigator
 
 
 
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Contact

 

+44 (0)20 7594 6745j.kilner Website

 
 
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Location

 

214Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Tellez:2016:10.1149/07207.0057ecst,
author = {Tellez, H and Druce, J and Ishihara, T and Kilner, JA},
doi = {10.1149/07207.0057ecst},
pages = {57--69},
publisher = {Electrochemical Society},
title = {Effects of microstructure on surface segregation: role of grain boundaries},
url = {http://dx.doi.org/10.1149/07207.0057ecst},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - The effects of microstructure on the kinetics of strontium segregation in La0.6Sr0.4CoO3-δ ceramic samples are investigated. A faster segregation of the Sr cations towards the surface was observed after annealing for 1 h at 600 °C in dry oxygen (pO2= 200 mbar) as the density of grain boundaries at the surface increases (i.e. with a decrease of the grain size). The presence of surface impurities, such as Na, partially inhibits the Sr segregation towards the surface. Optical micrographs and ToF-SIMS chemical imaging showed that the segregation and precipitation of Sr starts at the grain boundaries, with an apparent enrichment of the surface around the grain boundary via Sr surface diffusion.
AU  - Tellez,H
AU  - Druce,J
AU  - Ishihara,T
AU  - Kilner,JA
DO  - 10.1149/07207.0057ecst
EP  - 69
PB  - Electrochemical Society
PY  - 2016///
SN  - 1938-5862
SP  - 57
TI  - Effects of microstructure on surface segregation: role of grain boundaries
UR  - http://dx.doi.org/10.1149/07207.0057ecst
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000403795400006&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/53548
ER  -
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