Metal surface modification by a nanosecond diffuse discharge in nitrogen

M. Erofeev, M. Shulepov, V. Tarasenko

Research output: Contribution to journalArticle

Abstract

The study demonstrates the feasibility of surface modification by a runaway electron preionized diffuse discharge (REP DD) at atmospheric pressures on a nanosecond pulse generator. It is shown that REP DD treatment provides an up to twofold decrease in carbon concentrations in the surface layers of steel and aluminum. It is found that both materials subjected to REP DD are involved in surface oxidation with the result that the oxygen concentration in steel surface layers increases three times and the surface microhardness of the material is enhanced at different depths, whereas the oxygen concentration in aluminum surface layers remains almost unchanged, and the surface microhardness of the material decreases due to the formation of an amorphous oxide layer.

Original languageEnglish
Pages (from-to)71-75
Number of pages5
JournalHigh Temperature Material Processes
Volume19
Issue number1
DOIs
Publication statusPublished - 2015

Keywords

  • Atmospheric pressure
  • Plasma modification of steel and aluminum
  • Runaway electron preionized diffuse discharge

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Engineering(all)
  • Materials Science(all)
  • Energy Engineering and Power Technology
  • Spectroscopy
  • Physical and Theoretical Chemistry

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