Application of Pulsed Electron Beams for Improvement of Material Surface Properties

G. Mueller1 , V. Engelko2 , H. Bluhm1, A. Heinzel1, G. Schumacher1, D. Strauss1,

A. Weisenburger1, F. Zimmermann1, V. Shulov3, N. Notchovnaia3

1- Forschungszentrum Karlsruhe, Institut für Hochleistungsimpuls- und Mikrowellentechnik, Postfach 3640, D-76021 Karlsruhe, Germany

2- Efremov Institute of Electrophysical Apparatus, 189631, St. Petersburg, Russia

3- Moscow Aviation Institute, 125 993 Moscow, Russia

 

Material surface treatment by intense large area pulsed electron beams offers a wide range of applications for the improvement of material surface properties such as wear, corrosion and oxidation resistance. The treatment involves rapid melting of a material surface layer followed by rapid quenching due to heat conduction into the bulk unaffected material.

The pulsed electron beam facilities GESA I and GESA II, have been designed especially for large area surface treatment. They offer the possibility to melt the surface of materials to a depth of 10-100 Ám. The beam parameters are: electron energy 50-400 keV; current 200-500 A; pulse duration 5-250 Ás; maximum power and energy density at the target 6 MW/cm and 500 J/cm2, resp..

Both facilities were developed in cooperation between Efremov Institute St. Petersburg, Russia and the Research Center Karlsruhe (FZK), Germany and operate at FZK, GESA I since 1996 and GESA II since 2000, with the following technological applications:

The present paper describes after a short introduction to the GESA facilities examples and results of the technological applications.