Low-modulus biomedical Ti-30Nb-5Ta-3Zr additively manufactured by Selective Laser Melting and its biocompatibility.
Mater Sci Eng C Mater Biol Appl
; 97: 275-284, 2019 Apr.
Article
in En
| MEDLINE
| ID: mdl-30678912
ABSTRACT
Low Young's modulus titanium alloys, such as Ti-30Nb-5Ta-3Zr (TNTZ) of this study, were promising biocompatible implant materials. In this work, TNTZ samples with relative density of 96.8%-99.2% were additively manufactured by powder-bed based Selective Laser Melting (SLM) through tuning processing parameters, i.e. varying the point distance between 50 and 75⯵m, laser exposure time between 135 and 200⯵s, and a fixed laser power of 200â¯W. The microstructure, elastic properties, fatigue properties and machining accuracy of the fabricated samples have been investigated. Lattice structure TNTZ samples with porosity of 77.23% were also fabricated to further reduce the Young's modulus of the TNTZ. According to the Relative Growth Rate (RGR) value, the as-printed TNTZ samples exhibited no cell cytotoxicity, where they showed even better biocompatibility than the comparative, as-printed Ti-6Al-4V samples. The as-printed TNTZ developed by the study demonstrates good biocompatibility, low stress shielding tendency and high mechanical properties.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Biocompatible Materials
/
Alloys
Limits:
Animals
Language:
En
Journal:
Mater Sci Eng C Mater Biol Appl
Year:
2019
Document type:
Article