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Manufacturing of silicon – Bioactive glass scaffolds by selective laser melting for bone tissue engineering

AuthorsRodrigo-Vázquez, C. Sara; Kamboj, Nikhil; Aghayan, Marina; Sáez, Ada; Aza Moya, Antonio H. de ; Rodríguez, Miguel A. ; Hussainova, Irina
KeywordsSelective laser melting
Issue Date10-Aug-2020
CitationCeramics International 46: 26936- 26944 (2020)
AbstractThe irruption of additive manufacturing techniques opens the possibility to develop three-dimensional structures with complex geometries and high precision. In the current investigation a newly designed composite combining silicon (30, 40 and 50 wt%) with a bioactive glass and printed into scaffolds was obtained, using a direct selective laser melting (SLM) approach for the first time. Samples were computer-aided designed (CAD) to have cylindrical pores of 400 μm in diameter in order to be used as biomaterials for bone replacement. X – Ray diffraction was used to characterize the appearance of a new phase of pseudowollastonite precipitated by the partial devitrification of the glassy phase after the incidence of laser radiation. The mechanical behaviour of each composition was studied trough stress-strain curves, obtaining higher values of compressive strength as the silicon content increases. Scanning electron microscopy coupled to energy dispersive X – Ray spectroscopy (SEM-EDS) and Raman spectroscopy were used to study the bioactivity of each composite after soaking in the simulated body fluid (SBF) for 7 days, confirming this behaviour.
Publisher version (URL)http://dx.doi.org/10.1016/j.ceramint.2020.07.171
Identifiersdoi: 10.1016/j.ceramint.2020.07.171
issn: 0272-8842
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