Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 21st October 2020 from 07:00 AM to 07:00 PM (BST).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 53, 2016
Previous Article Next Article

Substantial enhancement of corrosion resistance and bioactivity of magnesium by incorporating calcium silicate particles

Author affiliations

Abstract

Biodegradable metal matrix composites (MMCs) with pure magnesium as the matrix and bioceramic calcium silicate (CS) as the reinforcement phase were fabricated by means of spark plasma sintering (SPS). The microstructure, mechanical properties and degradation behavior of the composites as well as the cellular responses to these composites were investigated. The formation of CS networks in the Mg matrix was observed when the CS content reached 20%. Among the composites with CS weight percentages ranging from 10% to 40%, the composite containing 20% CS possessed the highest structural compactness and compressive strength. Immersion tests in simulated body fluid (SBF) revealed that the Mg–20% CS composite exhibited a substantially enhanced corrosion resistance as compared with pure Mg, which was attributed to the formation of a hydroxyapatite (HA) layer on the surface as a result of the presence of the CS networks throughout the Mg matrix. In addition, ionic products from the interaction between the Mg–20% CS composite and SBF brought about a significant stimulatory effect on the alkaline phosphate (ALP) expression of MC3T3-E1 osteoblast cells. Our results indicate that CS is an effective reinforcement phase to improve both the corrosion resistance and bioactivity of Mg and the Mg–CS composites developed in this research are able to overcome the inherent drawbacks of magnesium as a biodegradable implant material.

Graphical abstract: Substantial enhancement of corrosion resistance and bioactivity of magnesium by incorporating calcium silicate particles

Back to tab navigation

Article information


Submitted
21 Dec 2015
Accepted
29 Apr 2016
First published
03 May 2016

RSC Adv., 2016,6, 47897-47906
Article type
Paper

Substantial enhancement of corrosion resistance and bioactivity of magnesium by incorporating calcium silicate particles

Z. Huan, C. Xu, B. Ma, J. Zhou and J. Chang, RSC Adv., 2016, 6, 47897
DOI: 10.1039/C5RA27302A

Social activity

Search articles by author

Spotlight

Advertisements