Plasma nitriding of austenitic stainless steel in N2 and N2–H2 dc pulsed discharge

Hardness evaluation, stoichiometry and grain size of titanium nitride films obtained with plasma nitriding on Ti-6Al-4V samples

“…Plasma nitriding by glow discharge is an important process to improve surface properties of these alloys [1][2][3][4][5][6]. Some questions remain about the dependence of surface properties on nitriding parameters.…”

Direct Current and Pulsed Direct Current Plasma Nitriding of Ferrous Materials a Critical Review

“…In order to prevent arcing, the batch must be thoroughly cleaned from oil, grease and rust in relatively expensive cleaning routine (Gallo and Dong, 2009). According to Sharma et al (2006) arcing can also be avoided by optimizing duty factor of the pulse in plasma deposition method.…”

Spatially-resolved Spectral Image of a Microwave-induced Plasma with Okamoto-cavity for Nitridation of Steel Substrate

“…9.8 eV via lots of the excited vibrational levels. 20 On the other hand, the B 3 Πg and the C 3 Πu excited states have an internal energy of ca. 7.6 eV and ca.…”

“…Glow discharge plasmas, which are maintained in nitrogen and nitrogen-hydrogen atmospheres at reduced pressures of 10 2 -10 4 Pa, are used in plasma nitridation most commonly, producing several kinds of iron and chromium nitrides and iron-matrix phases containing large amounts of interstitial nitrogen in stainless-steel materials. [1][2][3][4] It is a drawback in the nitriding treatment using a glow discharge plasma that the reaction rate is very slow; in fact, it requires several hours to obtain a nitrided layer having several micrometers in thickness. 1 This is probably because of the low population of excited nitrogen species as well as the low temperature of the substrate in the glow discharge plasma at low gas pressures.…”