BACK-SCATTERING AND NEUTRALIZATION COEFFICIENTS OF NITROGEN IONS ON IRON SURFACE

The coefficients of back-scattering and neutralization of nitrogen ions (N+) on iron surface during ion bombardment at the processes of ion sputtering and niriding have been calculated using TRIM code. The pure iron target and two-element targets, Fe+Mo (1 and 5 %), Fe+W (1 and 5 %), were tested. The ion energy was from 0.1 to 70 keV. The ions N+
are considered to be back-scattering in the form of energetic N atoms. The calculations showed the back-scattering and neutralization coefficients are tens of percent for low energies N+ ions and several percent for energies of tens kiloelectron-volts. The average penetration depth of the ions into the Fe target and the ion sputtering coefficients are calculated, too.