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Radiation-Induced Nanostructures in an Iron Phosphate Glass

Published online by Cambridge University Press:  01 February 2011

K. Sun ,
T. Ding ,
L.M. Wang  and
R.C. Ewing
K. Sun
Affiliation:
Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI 48109 Electron Microbeam Analysis Laboratory, University of Michigan, Ann Arbor, MI 48109
T. Ding
Affiliation:
Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI 48109
L.M. Wang
Affiliation:
Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI 48109 Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109
R.C. Ewing
Affiliation:
Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI 48109 Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109
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Abstract

Electron and ion irradiation-induced nanostructures in an iron phosphate glass with a composition of 45 mol%Fe2O3-55 mol%P2O5 have been characterized by advanced electron microbeam techniques. Analysis by energy-filtered transmission electron microscopy indicated that Fe-rich and P-rich nanophases were formed when the glass was irradiated under a broad (with a diameter of 1.2μm) electron beam [give the dose range]. Phase separation developed with the increase in electron dose (from 1.0×1026e/m2 to 4.8×1026e/m2) as a result of the formation of an Fe-rich phase and pure P-phase. The formation of the Fe-rich and the P-phases are thought to be due to mainly ionization process. Under a low energy ion beam irradiation, Fe/FeO nanoparticles were formed, as confirmed by selected-area electron diffraction analysis. However, no nanoparticles were observed under a high-energy high-dose ion irradiation. The ion beam-irradiation results suggest that the formation of the Fe/FeO nanoparticles was due to preferential sputtering during ion irradiation and that the nanoparticles lie within the surface layers of the glass.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 792: Symposium R – Radiation Effects and Ion Beam Processing of Materials , 2003 , R3.21
Copyright
Copyright © Materials Research Society 2004

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References

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