Laser and plasma nitriding of titanium using CW-CO2 laser in the atmosphere

Surface nitriding of the titanium by the mixing technology with laser and plasma (LPN) in atmosphere has been investigated. Comparing with the technique of laser nitriding, we could obtain the titanium nitride at relatively low laser power density and the oxidation was prevented without the chamber. The synthesized layers comprised of titanium nitrides were about 178 μm depth. The effect of the laser power density, scanning velocity, and plasma flow rate on the components consisting of the material of the nitrided layer was studied. X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were used to reveal the components consisting of the material of the nitrided layer.