Duplex nitriding treatment of a beta-metastable Ti94Mo6 alloy for biomedical applications

D.M. Gordin (1) , A. Guillou (1) , I. Thibon (1) , Marcel Bohn (2) , D. Ansel (1) , T. Gloriant (1)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 LDO - Domaines Océaniques

In the present work, nitridation process of a biocompatible beta-type Ti94Mo6 (at.%) alloy was carried out to optimize the microhardness and brittleness surface characteristics. We propose a duplex treatment consisting of a superficial gas nitriding at high temperature followed by an annealing treatment. By this treatment, the superficial TiN layer is transformed into a nitrogen rich α-Ti layer with a superior adherence on the substrate. The coated Ti94Mo6 alloy combines the profitable bulk properties of the beta-type microstructure and a superior superficial microhardness reducing the wear debris in service for a use as prosthetic device.

Mots clés: Metals; Gas–solid reactions; Scanning electron microscopy; Surface electron diffraction

Domaines: Géochimie

D.M. Gordin, A. Guillou, I. Thibon, Marcel Bohn, D. Ansel, et al.. Duplex nitriding treatment of a beta-metastable Ti94Mo6 alloy for biomedical applications. Journal of Alloys and Compounds, 2008, 457 (1-2), pp.384-388. ⟨10.1016/j.jallcom.2007.02.155⟩. ⟨insu-00338844⟩