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Formation and Erosion of WC under W+ Irradiation of Graphite

Published online by Cambridge University Press:  18 March 2011

J. Roth ,
U. v. Toussaint ,
K. Schmid ,
J. Luthin ,
W. Eckstein ,
R. A. Zuhr  and
D.K. Hensley
J. Roth
Affiliation:
Max-Planck-Institut für Plasmaphysik, EURATOM Association, Garching, GERMANY
U. v. Toussaint
Affiliation:
Max-Planck-Institut für Plasmaphysik, EURATOM Association, Garching, GERMANY
K. Schmid
Affiliation:
Max-Planck-Institut für Plasmaphysik, EURATOM Association, Garching, GERMANY
J. Luthin
Affiliation:
Max-Planck-Institut für Plasmaphysik, EURATOM Association, Garching, GERMANY
W. Eckstein
Affiliation:
Max-Planck-Institut für Plasmaphysik, EURATOM Association, Garching, GERMANY
R. A. Zuhr
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN, USA
D.K. Hensley
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN, USA
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Abstract

The bombardment of C with 100 keV and 1 MeV W at normal incidence is studied as a function of the incident W fluence experimentally and by computer simulation with the program TRIDYN. Calculated oscillations in the amount of retained W and in the target weight change are confirmed experimentally for 100 keV at room temperature. XPS investigations show W2C formation during ion implantation already at room temperature. RBS depth profiles for 1 MeV bombardment show W mobility and surface segregation even at liquid nitrogen (LN2) temperatures. At elevated temperatures W clusters to form nano-particles at the surface and the oscillations in the retained amount of W disappear.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 658: Symposium GG – Solid-State Chemistry of Inorganic Materials III , 2000 , O5.31
Copyright
Copyright © Materials Research Society 2001

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References

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