期刊
RAPID PROTOTYPING JOURNAL
卷 20, 期 4, 页码 301-310出版社
EMERALD GROUP PUBLISHING LTD
DOI: 10.1108/RPJ-09-2012-0083
关键词
Selective laser melting; Titanium alloy; Hydroxyapatite; Hydroxyapatite decomposition; Microstructure
资金
- project Progress and development through post-doctoral research and innovation in engineering and applied sciences-PRIDE [POSDRU/89/1.5/S/57083]
- European Social Fund through Sectorial Operational Program Human Resources
Purpose - The purpose of this paper was to obtain by means of selective laser melting and then characterize biocomposites of medical-grade Ti6Al7Nb with hydroxyapatite (2 and 5 vol.%) and without hydroxyapatite, as reference. Design/methodology/approach - Rectangular samples were manufactured with the same scanning strategy; the laser power was between 50 W and 200 W. Processed samples were analysed by means of optical microscopy, scanning electron microscopy and microhardness. Findings - The results showed that despite the very short processing times, hydroxyapatite decomposed and interacted with the base Ti6Al7Nb material. The decomposition degree was found to depend on the applied laser power. From the porosity and bulk microstructure point of view, the most appropriate materials for the purposed medical applications were Ti6Al7Nb with hydroxyapatite processed with a laser power of 50 W. Originality/value - The originality of the present work consists in the study of the behaviour and interaction of hydroxyapatite additive with the Ti6Al7Nb base powder under selective laser melting conditions, as depending on the applied laser power.
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