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Porous Titanium Scaffolds Fabricated by Metal Injection Moulding for Biomedical Applications

Dehghan-Manshadi, A; Chen, Y; Shi, Z; Bermingham, M; StJohn, D; Dargusch, M; Qian, M; (2018) Porous Titanium Scaffolds Fabricated by Metal Injection Moulding for Biomedical Applications. Materials , 11 (9) 10.3390/ma11091573. Green open access

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Abstract

Biocompatible titanium scaffolds with up to 40% interconnected porosity were manufactured through the metal injection moulding process and the space holder technique. The mechanical properties of the manufactured scaffold showed a high level of compatibility with those of the cortical human bone. Sintering at 1250 °C produced scaffolds with 36% porosity and more than 90% interconnected pores, a compressive yield stress of 220 MPa and a Young's modulus of 7.80 GPa, all suitable for bone tissue engineering. Increasing the sintering temperature to 1300 °C increased the Young's modulus to 22.0 GPa due to reduced porosity, while reducing the sintering temperature to 1150 °C lowered the yield stress to 120 MPa, indicative of insufficient sintering. Electrochemical studies revealed that samples sintered at 1150 °C have a higher corrosion rate compared with those at a sintering temperature of 1250 °C. Overall, it was concluded that sintering at 1250 °C yielded the most desirable results.

Type: Article
Title: Porous Titanium Scaffolds Fabricated by Metal Injection Moulding for Biomedical Applications
Location: Switzerland
Open access status: An open access version is available from UCL Discovery
DOI: 10.3390/ma11091573
Publisher version: http://dx.doi.org/10.3390/ma11091573
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: corrosion, mechanical properties, metal injection moulding, scaffold, space holder, titanium
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10056630
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