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A new approach to the fabrication of “smart” near-surface nanostructure composites

Published online by Cambridge University Press:  10 February 2011

Laurence Gea ,
S. Honda ,
L. A. Boatner ,
T. E. Haynes ,
B. C. Sales ,
F. A. Modine ,
A. Meldrum ,
J. D. Budai  and
L Beckers
Laurence Gea
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
S. Honda
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
L. A. Boatner
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
T. E. Haynes
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
B. C. Sales
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
F. A. Modine
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
A. Meldrum
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
J. D. Budai
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
L Beckers
Affiliation:
Forschungzentrum Juelich, Germany
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Abstract

A new method for the formation of “smart” near-surface nanoscale composites has been developed. In this approach, small precipitates of active phases are embedded in the near-surface region of the material that is to be modified by a combination of ion implantation and thermal processing. The dispersion, concentration, and microstructure of the nanocrystals formed in the substrate material can be tailored through a careful choice of processing parameters – making this approach well suited to high-value-added, high-technology applications. The applicability of this approach to forming “smart” surfaces on otherwise inactive materials was established in the case of VO2 precipitates which were embedded in A12O3 single crystals to create a medium suitable for optical applications – including optical data storage. Most recently, this concept has been extended to the fabrication of magnetic-field-sensitive nanostructured surfaces by forming magnetostrictive precipitates of materials such as Ni or RFe2 (with R = Tm, Tb, Sm) that are embedded in various single-crystal-oxide hosts. These nanostructured, active surface composites have been characterized using XRD, RBS, TEM, and magneto-optical techniques.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 501: Symposium FF – Surface Controlled Nanoscale Materials for High-Added… , 1997 , 137
Copyright
Copyright © Materials Research Society 1998

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References

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