Preparation and evaluation of cerium oxide-bovine hydroxyapatite composites for biomedical engineering applications

The fabrication and characterization of bovine hydroxyapatite (BHA) and cerium oxide (CeO2) composites are presented. CeO2 (at varying concentrations 1, 5 and 10wt%) were added to calcinated BHA powder. The resulting mixtures were shaped into green cylindrical samples by powder pressing (350MPa) fol...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the mechanical behavior of biomedical materials 2014-07, Vol.35, p.70-76
Main Authors: Gunduz, O., Gode, C., Ahmad, Z., Gökçe, H., Yetmez, M., Kalkandelen, C., Sahin, Y.M., Oktar, F.N.
Format: Article
Language:English
Subjects:
Animals
BHA
Bioceramics
Biocompatible Materials - chemistry
Biomedical Engineering
Bone Substitutes - chemistry
Bovine hydroxyapatite
Cattle
Ceramics
Cerium - chemistry
Cerium oxide
Compressive Strength
Durapatite - chemistry
Hardness
Hydroxyapatite
Materials Testing
Mechanical properties
Microscopy, Electron, Scanning
Microstructure
Powders
Pressure
Scanning electron microscopy
Sintering
Sintering (powder metallurgy)
Stress, Mechanical
Temperature
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The fabrication and characterization of bovine hydroxyapatite (BHA) and cerium oxide (CeO2) composites are presented. CeO2 (at varying concentrations 1, 5 and 10wt%) were added to calcinated BHA powder. The resulting mixtures were shaped into green cylindrical samples by powder pressing (350MPa) followed by sintering in air (1000–1300°C for 4h). Density, Vickers microhardness (HV), compression strength, scanning electron microscopy (SEM) and X-ray diffraction (XRD) studies were performed on the products. The sintering behavior, microstructural characteristics and mechanical properties were evaluated. Differences in the sintering temperature (for 1wt% CeO2 composites) between 1200 and 1300°C, show a 3.3% increase in the microhardness (564 and 582.75HV, respectively). Composites prepared at 1300°C demonstrate the greatest compression strength with comparable results for 5 and 10wt% CeO2 content (106 and 107MPa) which are significantly better than those for 1wt% and those that do not include any CeO2 (90 and below 60MPa, respectively). The results obtained suggest optimal parameters to be used in preparation of BHA and CeO2 composites, while also highlighting the potential of such materials in several biomedical engineering applications.
ISSN:1751-6161
1878-0180
DOI:10.1016/j.jmbbm.2014.03.004