TY - JOUR
T1 - Scratch-resistant and well-adhered nanotube arrays produced via anodizing process on β-titanium alloy
AU - Pereira, Bruno Leandro
AU - Beilner, Gregory
AU - Lepienski, Carlos Maurício
AU - de Souza, Gelson Biscaia
AU - Kuromoto, Neide Kazue
AU - Szameitat, Erico Saito
AU - Peng, Ambrose Ngu See
AU - Lee, Jia Yee
AU - Claro, Ana Paula Rosifini Alves
AU - Nugent, Michael J.D.
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/3
Y1 - 2021/3
N2 - Well-adhered nanotube arrays were produced through the anodizing technique on a Ti-25Nb-25Ta alloy and tribo-mechanically evaluated by nanoindentation and nanoscratch tests. Disregarding substrate effects, the hardness of the nanotube arrays layer was 0.7 ± 0.1 GPa and elastic modulus was < 12 GPa, respectively. With the load increase and nanotubes compaction, hardness reached 1.8 GPa and elastic modulus stabilized in ∼40 GPa, which features a mechanically biocompatible gradient zone for implant applications. Under scratching, plastic deformations predominated in the nanotube arrays coating, which mechanism was load-dependent: in the first stage (up to 50 mN) and the initial tubes collapsing, the coating presented low cohesive strength; under higher loads and the progressive nanotubes compaction, the cohesive strength increased, as suggested by the pattern of cracks produced. The scratch resistance for the coating failure was higher than 500 mN, consisting of an excellent bonding adhesion for a nanotube layer produced by anodization.
AB - Well-adhered nanotube arrays were produced through the anodizing technique on a Ti-25Nb-25Ta alloy and tribo-mechanically evaluated by nanoindentation and nanoscratch tests. Disregarding substrate effects, the hardness of the nanotube arrays layer was 0.7 ± 0.1 GPa and elastic modulus was < 12 GPa, respectively. With the load increase and nanotubes compaction, hardness reached 1.8 GPa and elastic modulus stabilized in ∼40 GPa, which features a mechanically biocompatible gradient zone for implant applications. Under scratching, plastic deformations predominated in the nanotube arrays coating, which mechanism was load-dependent: in the first stage (up to 50 mN) and the initial tubes collapsing, the coating presented low cohesive strength; under higher loads and the progressive nanotubes compaction, the cohesive strength increased, as suggested by the pattern of cracks produced. The scratch resistance for the coating failure was higher than 500 mN, consisting of an excellent bonding adhesion for a nanotube layer produced by anodization.
KW - Anodizing
KW - Nanoindetation
KW - Nanoscratch
KW - Nanotube
KW - Ti-25Nb-25Ta
KW - β-Titanium alloys
UR - http://www.scopus.com/inward/record.url?scp=85097707481&partnerID=8YFLogxK
U2 - 10.1016/j.mtcomm.2020.101947
DO - 10.1016/j.mtcomm.2020.101947
M3 - Article
AN - SCOPUS:85097707481
SN - 2352-4928
VL - 26
JO - Materials Today Communications
JF - Materials Today Communications
M1 - 101947
ER -