Porous titanium scaffolds fabricated by metal injection moulding for biomedical applications

Dehghan-Manshadi, A, Chen, Y, Shi, Z, Bermingham, M, StJohn, D, Dargusch, M and Ma, Q 2018, 'Porous titanium scaffolds fabricated by metal injection moulding for biomedical applications', Materials, vol. 11, no. 9, pp. 1-13.


Document type: Journal Article
Collection: Journal Articles

Title Porous titanium scaffolds fabricated by metal injection moulding for biomedical applications
Author(s) Dehghan-Manshadi, A
Chen, Y
Shi, Z
Bermingham, M
StJohn, D
Dargusch, M
Ma, Q
Year 2018
Journal name Materials
Volume number 11
Issue number 9
Start page 1
End page 13
Total pages 13
Publisher MDPIAG
Abstract Biocompatible titaniumscaffoldswith up to 40%interconnected porosityweremanufactured 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.
Subject Metals and Alloy Materials
Keyword(s) Corrosion
Mechanical properties
Metal injection moulding
Scaffold
Space holder
Titanium
DOI - identifier 10.3390/ma11091573
Copyright notice © 2018 by the authors. Licensee MDPI, Basel, Switzerland. Creative Commons Attribution (CC BY) license
ISSN 1996-1944
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