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Title: Surface chemistry of Ti6Al4V components fabricated using selective laser melting for biomedical applications
Authors: Vaithilingam, Jayasheelan
Prina, Elisabetta
Goodridge, Ruth
Hague, Richard J.M.
Edmondson, Steve
Rose, Felicity R.A.J.
Christie, Steven D.R.
Keywords: Additive manufacturing
Selective laser melting (SLM)
Surface chemistry
Issue Date: 2016
Publisher: © The Authors. Published by Elsevier
Citation: VAITHILINGAM, J. ...et al., 2016. Surface chemistry of Ti6Al4V components fabricated using selective laser melting for biomedical applications. Materials Science and Engineering C, 67, pp. 294-303.
Abstract: © 2016 The Authors. Published by Elsevier B.V.Selective laser melting (SLM) has previously been shown to be a viable method for fabricating biomedical implants; however, the surface chemistry of SLM fabricated parts is poorly understood. In this study, X-ray photoelectron spectroscopy (XPS) was used to determine the surface chemistries of (a) SLM as-fabricated (SLM-AF) Ti6Al4V and (b) SLM fabricated and mechanically polished (SLM-MP) Ti6Al4V samples and compared with (c) traditionally manufactured (forged) and mechanically polished Ti6Al4V samples. The SLM-AF surface was observed to be porous with an average surface roughness (Ra) of 17.6 ± 3.7 μm. The surface chemistry of the SLM-AF was significantly different to the FGD-MP surface with respect to elemental distribution and their existence on the outermost surface. Sintered particles on the SLM-AF surface were observed to affect depth profiling of the sample due to a shadowing effect during argon ion sputtering. Surface heterogeneity was observed for all three surfaces; however, vanadium was witnessed only on the mechanically polished (SLM-MP and FGD-MP) surfaces. The direct and indirect 3T3 cell cytotoxicity studies revealed that the cells were viable on the SLM fabricated Ti6Al4V parts. The varied surface chemistry of the SLM-AF and SLM-MP did not influence the cell behaviour.
Description: This is an Open Access Article. It is published by Elsevier under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/
Sponsor: This work was supported by the Engineering and Physical Sciences Research Council (EPSRC; UK) under grant EP/I033335/2 and the Medical Research Council (MRC) -EPSRC Centre for Doctoral Training (CDT) in Regenerative Medicine (EP/L015072/1)
Version: Published
DOI: 10.1016/j.msec.2016.05.054
URI: https://dspace.lboro.ac.uk/2134/22260
Publisher Link: http://dx.doi.org/10.1016/j.msec.2016.05.054
ISSN: 0928-4931
Appears in Collections:Published Articles (Chemistry)

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