Improvements in Surface Properties of Ti-6Al-4V by Ion Nitriding

摘要

This paper presents the results from the studies on the surface layers produced by ion Nitriding at three different temperatures in order to improve wear resistance, hardness, and to modulate microstructure and chemical composition of surface layers. X-ray diffraction indicated the formation of two phases (TiN, Ti_2N) and the preferred orientation of TiN occurred when nitrided at 810 deg C. Ion nitrided surface had the Vickers hardness of 860 Hv and greatly improved the wear resistance of Ti-6Al-4V. The cytotoxicity was measured with NIH 3T3 fibroblast by SRB method and was compared with that of the FDA approved Ti-6Al-4V. Corrosion resistance and cytotoxicity was similar to untreated Ti-6Al-4V alloy.