Surface damage in TEM thick α-Fe samples by implantation with 150 keV Fe ions

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:352

Article

Aliaga, M. J.¹  Caturla, M. J.¹  Schaeublin, R.² 

[1] Univ Alicante, Fac Ciencias, Dept Fis Aplicada, E-03690 Alicante, Spain

[2] ETH, Dept Mat, Met Phys & Technol, CH-8093 Zurich, Switzerland

关键词: Molecular dynamics;    Defects;    Ion irradiation;    Surface damage;    Transmission electron microscopy;   

DOI  :  10.1016/j.nimb.2014.11.111

来源: Elsevier

【 摘 要 】

We have performed molecular dynamics simulations of implantation of 150 keV Fe ions in pure bcc Fe. The thickness of the simulation box is of the same order of those used in in situ TEM analysis of irradiated materials. We assess the effect of the implantation angle and the presence of front and back surfaces. The number and type of defects, ion range, cluster distribution and primary damage morphology are studied. Results indicate that, for the very thin samples used in in situ TEM irradiation experiments the presence of surfaces affect dramatically the damage produced. At this particular energy, the ion has sufficient energy to damage both the top and the back surfaces and still leave the sample through the bottom. This provides new insights on the study of radiation damage using TEM in situ. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

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