TY - JOUR
T1 - Ti-25nb-25ta alloy treated by plasma electrolytic oxidation in phosphoric acid for implant applications
AU - Beilner, Gregory
AU - Pereira, Bruno Leandro
AU - Lepienski, Carlos Maurício
AU - de Souza, Gelson Biscaia
AU - Szameitat, Erico Saito
AU - Kuromoto, Neide Kazue
AU - Claro, Ana Paula Rosifini Alves
AU - Sampaio, Viviane Seba
AU - Chee, Bor Shin
AU - da Luz, Aline Rosseto
AU - Nugent, Michael J.D.
N1 - Publisher Copyright:
© 2021, Universidade Federal do Rio de Janeiro. All rights reserved.
PY - 2021
Y1 - 2021
N2 - Among titanium alloys with non-toxic elements, the Ti-25Nb-25Ta alloy has good elastic behavior for applications in osseous implants, biocompatibility, and excellent corrosion resistance. The present study aimed to better the biocompatibility characteristics of Ti-25Nb-25Ta alloy modifying its surface through Plasma Electrolytic Oxidation (PEO) treatment. The formed oxide coating is amorphous and composed of two distinct porous formations: smaller hole-shaped pores and larger volcano-like pores. The regions with the formation of smaller pores and in the hole shaped presented the highest atomic percentage of the chemical element phosphorus. Nanoindentation tests have shown that the hardness of the Ti-25Nb-25Ta alloy is slightly lower than the commercially pure grade 2 titanium (a material used as reference), while elastic modulus measurements of Ti-25Nb-25Ta presented more suitable values for implant application (lower values when compared with titanium reference). After PEO treatment there were significant mechanical surface improvements (in-creased fairly surface hardness and decreased elastic modulus) for application in osseous tissue. Despite the Ti-25Nb-25Ta alloy presented excellent characteristics for applications in hard biological tissues, the PEO treatment better its features.
AB - Among titanium alloys with non-toxic elements, the Ti-25Nb-25Ta alloy has good elastic behavior for applications in osseous implants, biocompatibility, and excellent corrosion resistance. The present study aimed to better the biocompatibility characteristics of Ti-25Nb-25Ta alloy modifying its surface through Plasma Electrolytic Oxidation (PEO) treatment. The formed oxide coating is amorphous and composed of two distinct porous formations: smaller hole-shaped pores and larger volcano-like pores. The regions with the formation of smaller pores and in the hole shaped presented the highest atomic percentage of the chemical element phosphorus. Nanoindentation tests have shown that the hardness of the Ti-25Nb-25Ta alloy is slightly lower than the commercially pure grade 2 titanium (a material used as reference), while elastic modulus measurements of Ti-25Nb-25Ta presented more suitable values for implant application (lower values when compared with titanium reference). After PEO treatment there were significant mechanical surface improvements (in-creased fairly surface hardness and decreased elastic modulus) for application in osseous tissue. Despite the Ti-25Nb-25Ta alloy presented excellent characteristics for applications in hard biological tissues, the PEO treatment better its features.
KW - Mechanical properties
KW - Nanoindentation
KW - Plasma Electrolytic Ox-idation
KW - Ti-25Nb-25Ta
KW - Titanium alloy
UR - http://www.scopus.com/inward/record.url?scp=85103127640&partnerID=8YFLogxK
U2 - 10.1590/s1517-707620210001.1233
DO - 10.1590/s1517-707620210001.1233
M3 - Article
AN - SCOPUS:85103127640
SN - 1517-7076
VL - 26
JO - Revista Materia
JF - Revista Materia
IS - 1
M1 - e12933
ER -