The effect of C content on the mechanical properties of Ti–Zr coatings. (September 2015)

• Record Type: Journal Article
• Authors: Rodríguez-Hernández, M.G.; Jiménez, O.; Alvarado-Hernández, F.; Flores, M.; Andrade, E.; Canto, C.E.; Ávila, C.; Espinoza-Beltrán, F.
• Is Part Of: Journal of the mechanical behavior of biomedical materials. Volume 49(2015)
• Page Start: 269
• Page End: 276
• Publication Date: 2015-09
• Subjects: Metals and alloys -- Thin films -- Vapor deposition -- Mechanical properties; Biomedical materials -- Periodicals; Biomedical materials -- Mechanical properties -- Periodicals; Biomedical materials; Biomedical materials -- Mechanical properties; Periodicals; Electronic journals; 610.28
• DOI: 10.1016/j.jmbbm.2015.05.004
• Languages: English
• ISSNs: 1751-6161

Abstract

Abstract: In this study, Ti–Zr and Ti–Zr–C coatings were deposited at room temperature via pulsed-DC magnetron sputtering. A 70Ti–30Zr at% target and a 99.99% graphite plate were used to deposit samples. In order to modify C content, coatings were deposited at different target powers such as 50, 75 and 100 W. Changes on the structure, microstructure and mechanical properties due to C addition were studied. Results indicate that the as-deposited coatings were partly crystalline and that an increment on C content stabilized α ′ phase and inhibited the appearance of ω precipitates. Therefore, Ti–Zr–C alloys with C>1.9at% showed only α ′ phase whereas the others alloys exhibited α ′+ ω structures. Hardness values from 12.94 to 34.31 GPa were obtained, whereas the elastic modulus was found between 181.84 and 298 GPa. Finally, a high elastic recovery ratio (0.69–0.87) was observed as a function of composition. The overall properties of these coatings were improved due to C content increment, martensitic α ′ phase and nanocrystalline grain size (10–16 nm).