On the kinetics of nitride and diffusion layer growth in niobium plasma nitriding

Effect of Sputtered Fe on the Plasma Nitriding Mechanism of AISI H13 Tool Steel Using Electron-Beam-Excited Plasma

“…10. The diffusion coefficient D was determined by the following approximation: 32,33) where d is the depth of the nitrided layer and t is the treatment time. The diffusion coefficients of the samples nitrided under a V Fe of − 50 or + 3 V (experimental conditions without sputtering) were constant.…”

Tribocorrosion and Surface Protection Technology of Titanium Alloys: A Review

“…Chemical heat treatment is a process in which the material is placed in a medium containing a particular active element for heating and heat preservation, and a concentration gradient is formed on the surface to make the active ingredient enter the surface of the material to form a layer [ 164 , 165 , 166 , 167 ]. Chemical heat treatment can effectively improve the thermal fatigue resistance, wear resistance, and corrosion resistance of materials, and chemical heat treatment has a low cost, wide application, and mature technology [ 168 , 169 , 170 , 171 , 172 , 173 , 174 , 175 ].…”

Study of Surface Modification of Niobium Caused by Nitriding and Cathodic Cage Deposition

“…Nitriding and plasma deposition has been widely used to form niobium nitrides to improve the tribological behavior of several steels. In addition, these nitrides can act as protective layers against oxidation processes 9 and improve tribological performance 10 . Niobium nitride has excellent physical and chemical properties such as hardness 11 , wear resistance 12 , chemical stability 13 , and superconducting properties 14 high electrical conductivity, and superconducting transition temperature 15,16 .…”