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Modification of materials surface using plasma enhanced ion beams

Published online by Cambridge University Press:  09 March 2009

V. Bystritskii ,
A. Kharlov ,
E. Lavernia ,
X. Peng ,
Y. Yankelevich ,
E. Garate  and
V. Grigoriev
V. Bystritskii
Affiliation:
University of California at Irvine, Irvine, CA 92697–4575, USA
A. Kharlov
Affiliation:
University of California at Irvine, Irvine, CA 92697–4575, USA
E. Lavernia
Affiliation:
University of California at Irvine, Irvine, CA 92697–4575, USA
X. Peng
Affiliation:
University of California at Irvine, Irvine, CA 92697–4575, USA
Y. Yankelevich
Affiliation:
University of California at Irvine, Irvine, CA 92697–4575, USA
E. Garate
Affiliation:
Applied Pulsed Power Technologies, CDM, CA 92625, USA
V. Grigoriev
Affiliation:
Institute of Nuclear Physics, Tomsk 634050, Russia
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Abstract

The paper presents experimental results on the application of microsecond plasma opening switch (MPOS) technology for materials surface modification. The ion beam parameters generated by the MPOS are up to 250 keV energy and current density and energy densities of up to 150 A/cm2 and 2.2 J/cm2, respectively. Characterization of the treated samples showed structural changes to a depth of several microns. The small ion range (few microns) and fast cooling of the upper melted layer (up to 1010 K/s) result in formation of fine-grain structures characterized by improved corrosion and erosion properties. Measurements indicate an increase in microhardness of a factor of about 3 for carbon steel samples. Corrosion resistance increase for the treated samples of at least 3, as measured by mass loss and potentiodynamic methods, has been measured for Al alloys. Microstructural changes in the surface morphology indicate a reduction in grain size for the treated samples and the appearance of shallow craters. Results of numeric simulations are given for the temperature distribution in materials due to ion beam heating.

Type
Regular Papers
Information
Laser and Particle Beams , Volume 16 , Issue 4 , December 1998 , pp. 569 - 580
Copyright
Copyright © Cambridge University Press 1998

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