Mechanical properties, in vitro corrosion resistance and biocompatibility of metal injection molded Ti-12Mo alloy for dental applications

Xu, W, Lu, X, Wang, L, Shi, Z, Lv, S, Ma, Q and Qu, X 2018, 'Mechanical properties, in vitro corrosion resistance and biocompatibility of metal injection molded Ti-12Mo alloy for dental applications', Journal of the Mechanical Behavior of Biomedical Materials, vol. 88, pp. 534-547.


Document type: Journal Article
Collection: Journal Articles

Title Mechanical properties, in vitro corrosion resistance and biocompatibility of metal injection molded Ti-12Mo alloy for dental applications
Author(s) Xu, W
Lu, X
Wang, L
Shi, Z
Lv, S
Ma, Q
Qu, X
Year 2018
Journal name Journal of the Mechanical Behavior of Biomedical Materials
Volume number 88
Start page 534
End page 547
Total pages 14
Publisher Elsevier
Abstract A biocompatible Ti-12Mo alloy was fabricated by metal injection moulding (MIM) using non-spherical titanium, molybdenum powders and a purposely designed binder. The density, microstructure and tensile properties were characterized. This was followed by a detailed assessment of its in vitro corrosion and biocompatibility performances, compared with that of two commonly used titanium-based materials extra low interstitial (ELI) Ti-6Al-4V and commercially pure (CP) titanium. The MIM-fabricated Ti-12Mo alloy can achieve a wide range of mechanical properties through controlling sintering process. Specimens sintered at 1400 °C are characterized by fairly uniform near-ß microstructure and high relative density of 97.6%, leading to the highest tensile strength of 845.3 ± 21 MPa and elongation of 4.15 ± 0.2% while the highest elastic modulus of 73.2 ± 5.1 GPa. Owing to the formation of protective TiO2-MoO3 passive film, the MIM-fabricated Ti-12Mo alloy exhibits the highest corrosion resistance including the noblest corrosion potential, the lowest corrosion current density and the highest pitting potential in four different electrolytes. The in vitro cytotoxicity test suggests that the MIM-fabricated Ti-12Mo alloy displays no adverse effect on MC3T3-E1 cells with cytotoxicity ranking of 0 grade, which is nearly close to ELI Ti-6Al-4V or CP Ti. These properties together with its easy net-shape manufacturability make Ti-12Mo an attractive new dental implant alloy.
Subject Metals and Alloy Materials
Keyword(s) Biocompatibility
Corrosion resistance
Dental implants
Metal injection moulding
Ti-12Mo alloy
DOI - identifier 10.1016/j.jmbbm.2018.08.038
Copyright notice © 2018 Elsevier Ltd. All rights reserved.
ISSN 1751-6161
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