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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Tribocorrosion behavior of TiO2/Al2O3 nanolaminate, Al2O3, and TiO2 thin films produced by atomic layer deposition

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Radi, Polyana Alves [1, 2] ; Testoni, Giorgio Ernesto [3] ; Pessoa, Rodrigo Savio [1, 2] ; Maciel, Homero Santiago [1, 2] ; Rocha, Luis Augusto [4, 5, 6] ; Vieira, Lucia [1, 2]
Total Authors: 6
[1] Ctr Ciencia & Tecnol Plasmas & Mat PlasMat, Aeronaut Inst Technol ITA, Plasma & Proc Lab, Sao Paulo - Brazil
[2] Univ Paraiba Valley UNIVAP, Nanotechnol & Plasmas Proc Lab NanoTecPlasma, Sao Jose Dos Campos, SP - Brazil
[3] Univ Ctr SOCIESC UNISOCIESC, Joinville, SC - Brazil
[4] Sao Paulo State Univ UNESP, Fac Sci Bauru, Phys Dept, Bauru, SP - Brazil
[5] Inst Biomat Trihocorros & Nanomed IBTN Br, Brazilan Branch, Bauru, SP - Brazil
[6] Univ Minho, Ctr MicroElectroMech Syst CMEMS, Azurem, Guimaraes - Portugal
Total Affiliations: 6
Document type: Journal article
Source: SURFACE & COATINGS TECHNOLOGY; v. 349, p. 1077-1082, SEP 15 2018.
Web of Science Citations: 5

Metallic materials are the most widely used for orthopedic applications and, their corrosion resistance is one of the main prerequisites for avoiding impairment of the material properties due to degradation. Ti-6A1-4V is one of the main medical titanium alloys. However, for permanent implant applications, this alloy may cause toxic effect due to release of vanadium and aluminum. Nanolaminates of alternatively ordered thin films of transition metal oxides with nanoscale thickness are known to have distinct properties of a single layer film. Atomic layer deposition (ALD) is a promising method for fabrication of thin sealing coatings for corrosion protection. These films can also be used as in vivo sensors to antedate the detection of diseases such as cancer, to inform the best treatments, and to understand the response to therapies. The ideal in vivo sensor should be non-toxic, biocompatible, stable, and very sensitive. In this work, TiO2/Al2O3 nanolaminate, Al2O3 and TiO2 thin films were deposited on Ti-6A1-4V substrates by using ALD and their structure, adhesion and tribocorrosion properties were analyzed. The tribocorrosion tests were performed in Ringer's solution. The coatings showed to protect the sample surface evidenced by the increase on the OCP both in static mode and in dynamic mode. The TiO2/Al2O3 nanolaminates presented lower friction coefficient. (AU)

FAPESP's process: 11/50773-0 - Center of excellence in physics and applications of plasmas
Grantee:Ricardo Magnus Osório Galvão
Support type: Research Projects - Thematic Grants
FAPESP's process: 08/05533-9 - Analytical Tribochemistry: tribological parameters dependence with surface modification study on carbon based films
Grantee:Polyana Alves Radi Gonçalves
Support type: Scholarships in Brazil - Doctorate