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Metals 2016, 6(11), 261; doi:10.3390/met6110261

Temperature-Dependent Helium Ion-Beam Mixing in an Amorphous SiOC/Crystalline Fe Composite

1
Nebraska Center for Energy Sciences Research, University of Nebraska-Lincoln, Lincoln, NE 68583-0857, USA
2
Department of Nuclear Engineering, Texas A & M University, College Station, TX 77843-3128, USA
3
Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE 68583-0857, USA
4
Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, NE 68588-0298, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Hugo F. Lopez
Received: 22 August 2016 / Revised: 12 October 2016 / Accepted: 25 October 2016 / Published: 31 October 2016
(This article belongs to the Special Issue Radiation Effects in Metals)
View Full-Text   |   Download PDF [3149 KB, uploaded 31 October 2016]   |  

Abstract

Temperature dependent He-irradiation-induced ion-beam mixing between amorphous silicon oxycarbide (SiOC) and crystalline Fe was examined with a transmission electron microscope (TEM) and via Rutherford backscattering spectrometry (RBS). The Fe marker layer (7.2 ± 0.8 nm) was placed in between two amorphous SiOC layers (200 nm). The amount of ion-beam mixing after 298, 473, 673, 873, and 1073 K irradiation was investigated. Both TEM and RBS results showed no ion-beam mixing between Fe and SiOC after 473 and 673 K irradiation and a very trivial amount of ion-beam mixing (~2 nm) after 298 K irradiation. At irradiation temperatures higher than 873 K, the Fe marker layer broke down and RBS could no longer be used to quantitatively examine the amount of ion mixing. The results indicate that the Fe/SiOC nanocomposite is thermally stable and tends to demix in the temperature range from 473 to 673 K. For application of this composite structure at temperatures of 873 K or higher, layer stability is a key consideration. View Full-Text
Keywords: radiation tolerant materials; amorphous SiOC; nanocrystalline Fe; amorphous/crystalline interface radiation tolerant materials; amorphous SiOC; nanocrystalline Fe; amorphous/crystalline interface
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Su, Q.; Price, L.; Shao, L.; Nastasi, M. Temperature-Dependent Helium Ion-Beam Mixing in an Amorphous SiOC/Crystalline Fe Composite. Metals 2016, 6, 261.

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