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Structural Disordering in Magnesium Aluminate Spinel Compounds under Ion-Beam Irradiation

Published online by Cambridge University Press:  01 February 2011

Syo Matsumura ,
Mikio Shimada ,
Kazuhiro Yasuda  and
Chiken Kinoshita
Syo Matsumura
Affiliation:
Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Fukuoka 812–8581, Japan
Mikio Shimada
Affiliation:
Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Fukuoka 812–8581, Japan
Kazuhiro Yasuda
Affiliation:
Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Fukuoka 812–8581, Japan
Chiken Kinoshita
Affiliation:
Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Fukuoka 812–8581, Japan
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Abstract

High Angular Resolution Electron Channeling X-ray Spectroscopy (HARECXS) of analytical electron microscopy was employed in quantitative analysis of irradiation-induced structural disordering in MgO·n Al2O3 spinel compounds irradiated with 1 MeV Ne+ ions and 200 MeV Xe14+ ions. The results successfully show the disordering behavior in MgO·n Al2O3 as a function of composition and irradiation condition. It has been revealed by HARECXS that 1 MeV Ne+ irradiation at 873 K causes significant cation-disordering in the pre-peak damaged area where no indication is recognized in conventional TEM observation. Displacement of O2- ions is also recognized in heavily damaged areas. Irradiation with 200 MeV Xe14+ swift ions, on the other hand, forms structurally-disordered cylinders of 4 nm in diameter along their tracks. HARECXS profiles indicate that the disordering takes place over extended areas of about 10 nm in radius centered on the ion tracks.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 792: Symposium R – Radiation Effects and Ion Beam Processing of Materials , 2003 , R5.2
Copyright
Copyright © Materials Research Society 2004

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