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Electronmicroscopical Study of the Formation of Iron Carbide Phases After High-fluence Carbon Ion Implantation into Iron at Low Temperatures

Published online by Cambridge University Press:  31 January 2011

C Hammerl ,
A. Königer  and
B. Rauschenbach
C Hammerl*
Affiliation:
Institut für Physik, Universität Augsburg, D-86135 Augsburg, Germany
A. Königer
Affiliation:
Institut für Physik, Universität Augsburg, D-86135 Augsburg, Germany
B. Rauschenbach
Affiliation:
Institut für Physik, Universität Augsburg, D-86135 Augsburg, Germany
*
a)Address correspondence to this author. e-mail: hammerl@physik.uni-augsburg.de
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Abstract

Carbon ions were implanted with energies between 50 and 150 keV into thin iron layers at temperatures of –10 °C and –70 °C. Formation of iron carbide phases was studied as a function of fluence, which was varied from 1.2 × 1017 C+-ions/cm2 up to 1.4 × 1018 C+-ions/cm2. The sequence of phase transformation during subsequent annealing to temperatures of up to 450 °C was also investigated. Detailed analysis of structure and morphology was done by cross-sectional transmission electron microscopy and electron diffraction experiments. The existence of metastable iron carbide phases, θ-Fe3C, Χ-Fe5C2, η-Fe2C, and also the amorphous phase Fe(C), after high-fluence carbon ion implantation and the transformation of the formed metastable phases by subsequent annealing into the θ-Fe3C phase are demonstrated.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 9 , September 1998 , pp. 2614 - 2622
Copyright
Copyright © Materials Research Society 1998

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