Selective laser sintering/melting of nitinol-hydroxyapatite composite for medical applications

I. V. Shishkovskii, I. A. Yadroitsev, I. Yu Smurov

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

The layer-by-layer synthesis of 3D parts from nitinol (NiTi intermetallide) and hydroxyapatite additions using selective laser sintering/melting (SLS/SLM) is studied. The effect of different laser parameters on the structure and phase composition of sintered/melted samples is analyzed with optical and scanning electron microscopy, x-ray diffraction, and energy-dispersive x-ray analysis. Optimum SLS/SLM parameters are determined for the synthesis of NiTi∈+∈HA to be used in tissue engineering and manufacture of medical devices (pins, nails, porous implants, drug delivery systems). No significant destruction of HA ceramics under laser treatment is observed. The amount of nickel released to the surface of 3D parts decreases owing to the additional oxidation of free titanium during SLS/SLM and the formation of a protective HA layer. Full-density 3D parts are produced from nitinol by SLM including preheating to 300°C.

Original languageEnglish
Pages (from-to)275-283
Number of pages9
JournalPowder Metallurgy and Metal Ceramics
Volume50
Issue number5-6
DOIs
Publication statusPublished - Sep 2011
Externally publishedYes

Keywords

  • hydroxyapatite (HA)
  • nitinol
  • porous tissue engineering
  • selective laser sintering/melting (SLS/SLM)

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