Investigation on Hard-Tissue Compatibility of TiN Surface Formed by Atmospheric-Pressure-Plasma Nitriding

Abstract

In this study, we demonstrated the improvement in the biocompatibility of titanium alloy by atmosphericpressure-plasma nitriding, in which the pulsed-arc plasma jet is sprayed onto a titanium alloy to form TiN surface. The deposition properties of calcium phosphate on different samples were compared after immersion in simulated body fluid to investigate hard-tissue compatibility. It was determined that the growth of the calcium phosphate layer on the nitrided sample was the most rapid. This result suggests that atmospheric-pressure-plasma nitriding has the potential to easily improve the hard-tissue compatibility of titanium alloy.

Controlling Nitrogen Dose Amount in Atmospheric-Pressure Plasma Jet Nitriding

“…As another technological seed, nitriding methods using atmospheric-pressure plasmas have been developed, where the disuse of vacuum equipment makes the process much quicker and easier-to-operate. Two types of atmospheric-pressure plasmas are utilized to nitriding, namely the pulsed-arc (PA) plasma jet [17][18][19][20][21][22] and the dielectric barrier discharge (DBD) [23,24]. The PA plasma-jet nitriding has proved to be available to die steel [17,18,22], austenitic stainless steel [20], and titanium alloy [19,21], where the jet plume is sprayed onto the sample surface to thermally diffuse nitrogen atoms into it.…”

Bright nitriding using atmospheric-pressure pulsed-arc plasma jet based on NH emission characteristics

“…On the other hand, we have been developing original nitriding techniques by utilizing atmospheric-pressure plasmas. [18][19][20][21][22][23][24][25][26][27][28] For example, we have achieved surface nitriding of tool steel, [18][19][20][21] stainless steel, 22) and titanium alloy 23,24) with a pulsed-arc (PA) plasma jet. In addition, several groups have proved that dielectric barrier discharge enables the nitriding of steel.…”