Ion implantation of oxygen and nitrogen in CpTi

• Published in: Progress in organic coatings Vol. 64; no. 2; pp. 259 - 263
• Main Authors: Muñoz-Castro, A.E., López-Callejas, R., Granda-Gutiérrez, E.E., Valencia-Alvarado, R., Barocio, S.R., Peña-Eguiluz, R., Mercado-Cabrera, A., de la Piedad Beneitez, A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2009
• Subjects: Corrosion; Microhardness; PIII; Titanium; XRD; Titanium; XRD; Corrosion; PIII; Microhardness
• ISSN: 0300-9440; 1873-331X
• DOI: 10.1016/j.porgcoat.2008.08.021

A study of the plasma ion implantation (PIII) of commercially pure titanium (CpTi) at a low voltage (<4 kV) is presented. The processed samples were treated in divers mixtures of O and N in order to achieve biocompatible oxidized and nitrided layers as well as to enhance their superficial hardness. In this way, the low wearing resistance of CpTi can be avoided while creating a biocompatible rutile phase titanium oxide layer for a better bone integration. A form of synergy associated to the dependence of microhardness on the implanted layer disposition is identified. Thus, an upper rutile layer is immediately followed by another one, in which titanium, a nitride (TiN 0.26) and rutile coexist. The latter leads to a superior microhardness performance. Most of all these surface treatments of titanium, when applying an 80%N–20%O mixture, yield higher corrosion resistance parameters with respect to the main metallic materials used in prosthetics, including the Co–Cr–Mo alloys, albeit excluding CpTi.