Article Dans Une Revue Surface and Coatings Technology Année : 2024

Superelastic and biocompatible Ti-Zr-Nb-Sn coatings deposited by magnetron sputtering

Résumé

We report on the microstructural, mechanical and biological properties of novel quaternary TiZrNbSn (in at.%) coatings obtained by magnetron sputter-deposition on Si substrates and Ti disks. In particular, the influence of Nb content on the phase composition and superelastic response of as-deposited Ti-22Zr-xNb-3Sn films are examined. Three compositions were selected corresponding to Nb content x = 10, 17 and 20 at.%. The structure of the films containing 10 and 17 at.% Nb consists of a mix of alpha'' and (3 phases in different proportions while the film with higher Nb content (20 at.%) possesses a single (3 structure. Their superelasticity was studied using a nanoindenter equipped with a spherical tip of 50 mu m diameter. It revealed that the film containing 17 at.% Nb exhibited the highest superelastic behavior with the largest indentation depth recovery ratio values all over the broad range of maximum penetration depths investigated as compared to the values measured for the two other films with 10 and 20 at.% Nb. The biocompatibility tests showed that Ti-22Zr-xNb-3Sn coatings involve high cytocompatibility and do not induce haemolysis, similarly to reference materials (Ti and NiTi).

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hal-04788031 , version 1 (25-02-2025)

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Thibaud Choquet, Hiroki Chigama, Grégory Abadias, Anny Michel, Thierry Gloriant, et al.. Superelastic and biocompatible Ti-Zr-Nb-Sn coatings deposited by magnetron sputtering. Surface and Coatings Technology, 2024, 494 (Part 2), pp.131419. ⟨10.1016/j.surfcoat.2024.131419⟩. ⟨hal-04788031⟩
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