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Biomimetic Coatings on Ti-Based Alloys Obtained by Powder Metallurgy for Biomedical Applications

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Abstract:

Comparing to hydroxyapatite (HA), which forms a strong chemical bond with the bony tissues, metallic materials are not able to bond with bone. For this reason, a great variety of complex coating methods, such as pulse-laser deposition, ion-beam assisted deposition and plasma-spray has been used to form a HA layer onto metallic surfaces. This study evaluated the performance of the biomimetic technique on apatite-based coating formation on two Tialloys. Ti-13Nb-13Zr and Ti-35Nb-7Zr-5Ta were obtained via powder metallurgy. The Tibased alloys were biomimetically coated using a technique which was modified from the conventional ones using a sodium silicate solution as the nucleant agent. Both alloys presented similar behavior in the evaluated conditions which means the formation of a homogeneous and well defined HA coating. These results show that these new non-toxic Tialloys seem to be very promising for biomedical applications.

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Periodical:

Materials Science Forum (Volumes 530-531)

Pages:

599-604

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.530-531.599

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Online since:

November 2006

Authors:

E.C.S. Rigo, M.C. Bottino, B.D. Carraro, Elisa B. Taddei, Vinicius André Rodrigues Henriques, Cosme Roberto Moreira Silva, Ana Helena A. Bressiani, José Carlos Bressiani

Keywords:

Biomimetic Method, Hydroxyapatite (HAP), Powder Metallurgy (PM), Sodium Silicate, TiAl

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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