Journal
POWDER METALLURGY
Volume 55, Issue 4, Pages 309-314Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1179/1743290112Y.0000000007
Keywords
Titanium alloy; Hydroxyapatite; Selective laser melting; Microstructure; Tensile properties
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Funding
- 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
- Romanian National Council for the Higher Education Scientific Research
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The aim of the present work was to estimate the feasibility of selective laser melting (SLM) to produce Ti-hydroxyapatite bioactive composite materials for personalised endosseous implants. Mixtures of Ti6Al7Nb surface conditioned powder with hydroxyapatite up to 5 vol.-% were processed by SLM with the same scanning strategy and laser power in the range of 50-200 W. Specimens with porous structures were characterised from a structural and mechanical point of view. Irrespective to the initial hydroxyapatite content, density increased by increasing the laser power. The microstructure of manufactured parts mainly consisted of alpha' martensite. In materials with 5 vol.-% hydroxyapatite, a phosphorous containing phase formed as a consequence of hydroxyapatite decomposition and interaction with the base Ti alloy. By increasing the laser power, the tensile strength increased mainly due to the density improvement of all the investigated materials.
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