Issue 5, 2020

Low temperature consolidation of hydroxyapatite-reduced graphene oxide nano-structured powders

Abstract

In this study, hydroxyapatite-reduced graphene oxide (HA-rGO) powders were first synthesized in situ using a hydrothermal method. These powders were then consolidated using a cold sintering method. The solvent used in this method was water + dimethylformamide + brushite which was added to the powders at different ratios. The sintered samples were then evaluated using X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, high-resolution transmission electron microscopy, and Vickers microindentation. The results of this study showed that the best conditions for the sintering of rGO-HA nanopowders were a temperature of 200 °C, a holding time of >30 min, and a pressure of 500 MPa. The best mechanical properties were achieved when the solvent content was considered to be 20 wt%. Crack deflection and graphene bridging were among the mechanisms that increased the fracture toughness of these nanocomposites. By adding 1.5% rGO, the fracture toughness of this nanocomposite (using the cold sintering method) was approximately equivalent to that of spark plasma sintered HA.

Graphical abstract: Low temperature consolidation of hydroxyapatite-reduced graphene oxide nano-structured powders

Article information

Article type
Paper
Submitted
16 Apr 2020
Accepted
07 Jul 2020
First published
17 Jul 2020
This article is Open Access
Creative Commons BY license

Mater. Adv., 2020,1, 1337-1346

Low temperature consolidation of hydroxyapatite-reduced graphene oxide nano-structured powders

H. Nosrati, R. Sarraf-Mamoory, R. Zolfaghari Emameh, D. Q. S. Le, M. Canillas Perez and C. E. Bünger, Mater. Adv., 2020, 1, 1337 DOI: 10.1039/D0MA00212G

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