Nitriding of Cp Titanium
Gas nitriding of a commercial purity Grade 4 titanium at 1120°C for 5 h formed hard TiN layer (2450 HV) on the surface with a thickness of about 35 m. When compared to the as-received state, nitrided titanium exhibited excellent wear resistance along with a relatively low coefficient of friction (CoF) against Al2O3 ball under dry sliding conditions.
Andreas Öchsner, Graeme E. Murch and João M.P.Q. Delgado
F. Seahjani and H. Cimenoglu, "Nitriding of Cp Titanium", Defect and Diffusion Forum, Vols. 312-315, pp. 1010-1014, 2011