Analytical Characterization of Various Titanium Nitride Based Coatings Obtained by Reactive Plasma Spraying

In this investigation, titanium layers with different titanium nitride phases are deposited via reactive gas plasma spraying using a statistical design-of-experiments approach to determine the effect of process parameters on coating properties. The layers are characterized by various means, showing how nitrogen concentration in the plasma gas, spraying pressure, and substrate temperature correspond with coating hardness, porosity, and nitriding levels. The values of all layer properties were found to increase with increasing nitrogen content in either the plasma gas or spraying atmosphere. Paper includes a German-language abstract.