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Perforation and Carbon Ablation Experiments on Nano-Ceria by Electron Irradiation

Published online by Cambridge University Press:  04 June 2013

Umananda M. Bhatta ,
Faris Karounis ,
Andrew Stringfellow  and
Günter Möbus
Umananda M. Bhatta
Affiliation:
Dept. Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, UK
Faris Karounis
Affiliation:
Dept. Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, UK
Andrew Stringfellow
Affiliation:
Dept. Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, UK
Günter Möbus
Affiliation:
Dept. Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, UK
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Abstract

The well-known high irradiation resistance of fluorite-structured oxides is examined on the nanoscale by focused electron beam irradiation of ceria nanoparticles. It is found that ceria is amongst the nanomaterials most resistant to electron beam perforation with mainly swelling and amorphisation damage observed, along with grain reorientation effects. A comparison to reference nano-materials, shows that cubic zirconia behaves similarly resistant but that ultra-fine holes can be drilled, unlike for ceria, while SiC on the other hand can be perforated easily. Ablation of carbon films around electron beam impact zones is found accelerated in ceria, as compared to SiC, and discussed as a potential catalytic effect.

Keywords

nanostructureCeradiation effects
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1552: Symposium S – Nanostructured Metal Oxides for Advanced Applications , 2013 , pp. 125 - 130
Copyright
Copyright © Materials Research Society 2013 

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References

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