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

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 di...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Materialia 2021-08, Vol.18, p.101174, Article 101174
Hauptverfasser: Stock, SR, Park, JS, Jakus, A, Birkbak, M, Frølich, S, Birkedal, H, Shah, R, Almer, JD
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung: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. [Display omitted]
ISSN:2589-1529
2589-1529
DOI:10.1016/j.mtla.2021.101174