Comparative study on Ti-Nb binary alloys fabricated through spark plasma sintering and conventional P/M routes for biomedical application

Karre, Rajamallu and Kodli, Basanth Kumar and Rajendran, Archana and J, Nivedhitha and Pattanayak, Deepak K and Ameyama, Kei and Dey, Suhash Ranjan (2019) Comparative study on Ti-Nb binary alloys fabricated through spark plasma sintering and conventional P/M routes for biomedical application. Materials Science and Engineering: C, 94. pp. 619-627. ISSN 0928-4931

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Abstract

The main purpose of this work is to obtain homogenous, single β phase in binary Ti-xNb (x = 18.75, 25, and 31.25 at.%) alloys by simple mixing of pure elemental powders using different sintering techniques such as spark plasma sintering (pressure-assisted sintering) and conventional powder metallurgy (pressure-less sintering). Synthesis parameters such as sintering temperature and holding time etc. are optimized in both techniques in order to get homogenous microstructure. In spark plasma sintering (SPS), complete homogeneous β phase is achieved in Ti25at.%Nb using 1300 °C sintering temperature with 60 min holding time under 50 MPa pressure. On the other hand, complete β phase is obtained in Ti25at.%Nb through conventional powder metallurgy (P/M) route using sintering temperature of 1400 °C for 120 min holding time which are adopted from the dilatometry studies. Nano-indentation is carried out for mechanical properties such as Young's modulus and nano-hardness. Elastic properties of binary Ti-xNb compositions are fallen within the range of 80–90 GPa. Cytotoxicity as well as cell adhesion studies carried out using MG63, osteoblast-like cells showed excellent biocompatibility of thus developed Ti25at.%Nb surface irrespective of fabrication route.

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IITH Creators:
IITH CreatorsORCiD
Dey, Suhash Ranjanhttp://orcid.org/0000-0002-5148-9534
Item Type: Article
Uncontrolled Keywords: Biomedical applications, Dilatometry, Nano-indentation, Powder metallurgy, Spark plasma sintering, β Ti alloys
Subjects: Materials Engineering > Materials engineering
Divisions: Department of Material Science Engineering
Depositing User: Team Library
Date Deposited: 09 Oct 2018 08:22
Last Modified: 09 Oct 2018 08:22
URI: http://raiithold.iith.ac.in/id/eprint/4469
Publisher URL: http://doi.org/10.1016/j.msec.2018.10.006
OA policy: http://www.sherpa.ac.uk/romeo/issn/0928-4931/
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