Solution combustion synthesis of strontium-doped hydroxyapatite: Effect of sintering and low compaction pressure on the mechanical properties and physiological stability

Solution combustion synthesis of strontium-doped hydroxyapatite: Effect of sintering and low compaction pressure on the mechanical properties and physiological stability

•The strontium-doped hydroxyapatite was synthesised by a facile and reproducible method.•Solution combustion (SC) synthesis seems to favour formation of less crystalline Sr-HAp.•The intense reflections for the SC-derived samples corresponded to (002), (211), (112), (210), and (222) planes.•Fabricati...

Full description

Saved in:
Bibliographic Details
Published in:Materials letters Vol. 304; p. 130613
Main Authors: Obada, D.O., Salami, K.A., Oyedeji, A.N., Fasanya, O.O., Suleiman, M.U., Ibisola, B.A., Atta, A.Y., Dodoo-Arhin, D., Kuburi, L.S., Dauda, M., Dauda, E.T.
Format: Journal Article
Language:English
Published: Amsterdam Elsevier B.V 01-12-2021
Elsevier BV
Subjects:
Bioceramics
Buffers
Calcium ions
Combustion synthesis
Fracture toughness
Hydroxyapatite
Indentation and hardness
Materials science
Mechanical properties
Microstructure
Pelleting
Pellets
Phase transformation
Physical properties
Physiology
Saline solutions
Sintering
Sintering (powder metallurgy)
Stability
Strontium
Bioceramics
Phase transformation
Microstructure
Indentation and hardness
Sintering
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•The strontium-doped hydroxyapatite was synthesised by a facile and reproducible method.•Solution combustion (SC) synthesis seems to favour formation of less crystalline Sr-HAp.•The intense reflections for the SC-derived samples corresponded to (002), (211), (112), (210), and (222) planes.•Fabrication of strontium-based scaffolds with low compaction and two-step sintering reduced surface pores.•The fluid retention capacity (swelling ratio) showed that the scaffolds were stable under physiological conditions.•Microhardness increased with strontium-doped HAp. The solution combustion route was used to fabricate strontium (Sr) doped hydroxyapatite (HAp). A low compaction pressure method was adopted for pelletizing the powders (Sr-HAp) prior to physical and mechanical properties measurement. Physiological stability of the pellets was conducted by immersing in Phosphate Buffer Saline (PBS) solution for 24 h. The Sr-HAp produced a comparatively higher hardness and fracture toughness of 0.38 GPa and 0.82 MPa·m1/2 compared with 0.20 GPa and 0.67 MPa·m1/2 for undoped HAp. The SEM images suggested that strontium co-existed with the calcium ion in hydroxyapatite due to the presence of irregular bead-like structures on a micro-scale. The Sr-HAp pellets were stable in Phosphate Buffer Saline solution.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2021.130613