Nas duas últimas décadas tem-se observado um grande avanço em técnicas para
modificação da superfície (1-10). Essas técnicas fazem uso de plasmas, lasers, feixes de …

In order to investigate the behavior of nitrogen active species during the pulsed dc plasma
nitriding process, emission spectra measurements by using optical emission spectroscopy …

Plasma diffusion treatment (PDT) is one of the most promising methods for improving both
the surface and the near-surface properties. The duplex treatment combining the plasma …

Austenitic stainless steel AISI 316 has been nitrided by low-temperature rf plasmas
containing various nitrogen–hydrogen gas mixtures, in order to study the effect of hydrogen …

Modern ion nitriding equipment are powered by pulsed sources in order to prevent arcing
and overheating. In industrial applications, the pulse frequency is usually adjusted to set the …

The purpose of this study is to investigate the effects of the duty factor on the surface
characteristics of plasma nitrided and diamond-like carbon (DLC) coated high-speed steels …

It is widely known that the hydrogen in steel produces embrittlement. This effect may cause
the failure of the elements (confining walls, mechanical parts, etc.) whose surfaces are in …

Notwithstanding its rapid development and numerous advantages over traditional nitriding
methods, the uptake of plasma nitriding technology into industrial surface engineering has …

Titanium substrates were nitrided in a pot type arc plasma furnace in the temperature range
1400–1500° C under different gas (Ar, N2, H2) mixture plasma for 15min each. The nitrided …

This study compares the nitriding efficiency of a low-pressure pure-nitrogen rf plasma for the
materials AISI-316 stainless steel, 99.8% iron and the low-alloy steels AISI 4140 and En41B …