首页|Titanium Nitride Coatings on Ti Alloys by PIRAC for Orthopedic Implants
Titanium Nitride Coatings on Ti Alloys by PIRAC for Orthopedic Implants
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NETL
NSTL
Trans Tech Publications Ltd
In the present work, Ti and Ti-6A1-4V were PIRAC nitrided at the relatively low temperatures of 700-850℃. To obtain thicker TiN layers, 3 stage PIRAC based coating was applied: (1) PIRAC nitriding followed by (2) PIRAC titanizing followed by (3) additional PIRAC nitriding. The microstructure and phase composition of the obtained surface layers were characterized employing X-ray diffraction and scanning electron microscopy with chemical analysis (SEM/EDS). Bending test was employed to evaluate the coatings adhesion to the substrate. Lower PIRAC nitriding temperatures yielded smoother TiN coatings with a more gradual microhardness decrease from the surface to the bulk. All PIRAC TiN based coatings have excellent adhesion to substrate - no delamination of the coating in bending tests was observed. The best combination of microhardness and adhesion was obtained using 3 stage PIRAC process.
NETL
NSTL
Trans Tech Publications Ltd
