title: The effect of C content on the mechanical properties of Ti-Zr coatings.
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>1.9 at% 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).
authors.affiliation: Departamento de Ingeniería de Proyectos, Universidad de Guadalajara, José Guadalupe Zuno 48, Zapopan, Jalisco 45100, Mexico. Electronic address: mgpergz@hotmail.com.
authors.forename: M G
authors.initials: MG
authors.lastname: Rodríguez-Hernández
authors.affiliation: Departamento de Ingeniería de Proyectos, Universidad de Guadalajara, José Guadalupe Zuno 48, Zapopan, Jalisco 45100, Mexico.
authors.forename: O
authors.initials: O
authors.lastname: Jiménez
authors.affiliation: Unidad Académica de Ingeniería I, Universidad Autónoma de Zacatecas, Av. López Velarde 801, Zacatecas, Zacatecas 98060, Mexico.
authors.forename: F
authors.initials: F
authors.lastname: Alvarado-Hernández
authors.affiliation: Departamento de Ingeniería de Proyectos, Universidad de Guadalajara, José Guadalupe Zuno 48, Zapopan, Jalisco 45100, Mexico.
authors.forename: M
authors.initials: M
authors.lastname: Flores
authors.affiliation: Instituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica Ciudad Universitaria S/N, D.F. 04510, Mexico.
authors.forename: E
authors.initials: E
authors.lastname: Andrade
authors.affiliation: Instituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica Ciudad Universitaria S/N, D.F. 04510, Mexico.
authors.forename: C E
authors.initials: CE
authors.lastname: Canto
authors.affiliation: Centro de Investigación y Estudios Avanzados del I.P.N., Libramiento Norponiente 2000, Querétaro, Querétaro 76230, Mexico.
authors.forename: C
authors.initials: C
authors.lastname: Ávila
authors.affiliation: Centro de Investigación y Estudios Avanzados del I.P.N., Libramiento Norponiente 2000, Querétaro, Querétaro 76230, Mexico.
authors.forename: F
authors.initials: F
authors.lastname: Espinoza-Beltrán
mesh_terms: D000497:Alloys / Q000737:chemistry*; D001672:Biocompatible Materials / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D008422:Materials Testing; D055595:Mechanical Phenomena; D013329:Structure-Activity Relationship; D014025:Titanium / Q000737:chemistry*; D015040:Zirconium / Q000737:chemistry*
chemical_list: D000497:Alloys; D001672:Biocompatible Materials; D002244:Carbon; D015040:Zirconium; D014025:Titanium
keywords: Mechanical properties; Metals and alloys; Thin films; Vapor deposition