In the present work, X-ray photoelectron spectroscopy (XPS) was used to study the surface chemical composition of three alloys for biomedical applications: Ti–7Nb–6Al, Ti–13Nb–13Zr and Ti–15Zr–4Nb. The surface of these alloys was modified by annealing in air at 750 °C for different times with the aim of developing an oxide thick layer on top. The evolution of surface composition with annealing time was studied by XPS, and compared with the composition of the native oxide layer present on the samples before annealing. Two different oxidation trends were observed depending on the alloying elements and their corresponding diffusion kinetics, which give rise to different chemical species at the topmost layers. These results were linked with an evaluation of the biological response of the alloys by bringing them in contact with human peripheral blood mononuclear cells (PBMC).

Thermal oxidation of vanadium-free Ti alloys: An X-ray photoelectron spectroscopy study / M.F.Lopez; A.Gutierrez; J.A.Jimenez; M.Martinesi; M.Stio; C.Treves. - In: MATERIALS SCIENCE AND ENGINEERING. C, BIOMIMETIC MATERIALS, SENSORS AND SYSTEMS. - ISSN 0928-4931. - STAMPA. - 30:(2010), pp. 465-471. [10.1016/j.msec.2010.01.004]

Thermal oxidation of vanadium-free Ti alloys: An X-ray photoelectron spectroscopy study

STIO, MARIA;TREVES, CRISTINA
2010

Abstract

In the present work, X-ray photoelectron spectroscopy (XPS) was used to study the surface chemical composition of three alloys for biomedical applications: Ti–7Nb–6Al, Ti–13Nb–13Zr and Ti–15Zr–4Nb. The surface of these alloys was modified by annealing in air at 750 °C for different times with the aim of developing an oxide thick layer on top. The evolution of surface composition with annealing time was studied by XPS, and compared with the composition of the native oxide layer present on the samples before annealing. Two different oxidation trends were observed depending on the alloying elements and their corresponding diffusion kinetics, which give rise to different chemical species at the topmost layers. These results were linked with an evaluation of the biological response of the alloys by bringing them in contact with human peripheral blood mononuclear cells (PBMC).
2010
30
465
471
M.F.Lopez; A.Gutierrez; J.A.Jimenez; M.Martinesi; M.Stio; C.Treves
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/386200
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