In situ loading and x-ray diffraction quantification of strains in hydroxyapatite particles within a 3D printed scaffold

S. R. Stock*, J. S. Park, A. Jakus, M. Birkbak, S. Frølich, H. Birkedal, R. Shah, J. D. Almer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A 3D printed scaffold consisting of a composite with very high volume fraction of particulate hydroxyapatite (hAp, 74 vol.%) and small volume fraction of poly-lactic-co-glycolic acid (26 vol.%) was loaded in compression, and the internal strains in the hAp phase were measured by high-energy x-ray diffraction. Diffraction patterns were recorded at multiple positions in the scaffold at cross-head displacements of 0, -0.52 and -0.62 mm (2.0 mm total scaffold height). The 00.2 and 21.0 hAp strains never exceeded 2 × 10−4, and most positions showed strains ≤ 1 × 10−4, which was the magnitude of the experimental uncertainty.

Original languageEnglish (US)
Article number101174
JournalMaterialia
Volume18
DOIs
StatePublished - Aug 2021

Keywords

  • Hydroxyapatite (hAp)
  • Internal stresses
  • Synchrotron radiation
  • Tissue engineering
  • X-ray diffraction

ASJC Scopus subject areas

  • Materials Science(all)

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