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Artículo

Mechanical characterization of nano-reinforced silica based sol-gel hybrid coatings on AISI 316L stainless steel using nanoindentation techniques

Ballarre, JosefinaIcon ; Jimenez Pique, Emilio; Anglada, Marc; Pellice, Sergio AntonioIcon ; Cavalieri, Ana LiaIcon
Fecha de publicación: 07/2009
Editorial: Elsevier Science Sa
Revista: Surface and Coatings Technology
ISSN: 0257-8972
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Nano-materiales

Resumen

One way to enhance the surface properties of metals used as surgical implants such as wear or protective behaviour is to use hybrid organic-inorganic sol-gel coatings. The addition of SiO2 colloidal particles to some hybrid formulation is thought to give films with bigger thickness than the coatings without particles, acting as mechanical reinforcement and to make an adequate surface to resist the extreme surgical procedures taking place in orthopaedic replacements. Coatings made by sol-gel with tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES) with the addition of silica nanoparticles were applied onto surgical grade stainless steel. One of the most recent techniques used to study the mechanical properties of thin films is the instrumented indentation, known as nanoindentation, was used to evaluate elastic modulus, hardness and friction coefficient. This is a superficial technique used to measure quasi-statically the penetration of an indenter at increasing loads applied to very little volumes of material. The mechanical properties values found for the TEOS-MTES-10%SiO2 coating are smaller than for the 30% filled coating, and higher that the coating without nanoparticles. In the scratch test of the TEOS-MTES-SiO2 30 wt.% coating it can be seen that in this case the failure takes place at higher applied load than for the less silica reinforced one, indicating a much better adhesion than the system with 10% of SiO2 nanoparticles. © 2009 Elsevier B.V. All rights reserved.
Palabras clave: Mechanical Properties , Nanoindentation , Orthopaedic Stainless Steel , Silica Coatings
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/66115
DOI: https://dx.doi.org/10.1016/j.surfcoat.2009.04.014
URL: https://linkinghub.elsevier.com/retrieve/pii/S0257897209003594
Colecciones
Articulos(INTEMA)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Citación
Ballarre, Josefina; Jimenez Pique, Emilio; Anglada, Marc; Pellice, Sergio Antonio; Cavalieri, Ana Lia; Mechanical characterization of nano-reinforced silica based sol-gel hybrid coatings on AISI 316L stainless steel using nanoindentation techniques; Elsevier Science Sa; Surface and Coatings Technology; 203; 20-21; 7-2009; 3325-3331
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