Effect of Yttria-doping on Mechanical Properties of Bovine Hydroxyapatite (BHA)

Sintered bodies of hydroxyapatite, derived from calcinated bovine bone (BHA) and doped with 0.5 and 1 wt% Y2O3, were prepared. Measurements of density, compression strength, and microhardness, along with scanning electron microscopy (SEM) and X-ray diffraction (XRD) were carried out. The experimenta...

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Bibliographic Details
Published in:Journal of composite materials 2008-07, Vol.42 (13), p.1281-1287
Main Authors: Gunduz, O., Daglilar, S., Salman, S., Ekren, N., Agathopoulos, S., Oktar, F.N.
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Materials science
Materials synthesis
materials processing
Physics
Solid mechanics
Structural and continuum mechanics
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Summary:Sintered bodies of hydroxyapatite, derived from calcinated bovine bone (BHA) and doped with 0.5 and 1 wt% Y2O3, were prepared. Measurements of density, compression strength, and microhardness, along with scanning electron microscopy (SEM) and X-ray diffraction (XRD) were carried out. The experimental results showed that BHA doping with yttria favors formation of glassy phase, which advances sintering and results in a dense and reinforced BHA matrix. The best mechanical properties were achieved after sintering at 1200°C for compressive strength (82MPa) and 1300°C for microhardness (672HV). These results are better than pure BHA or composites of hydroxyapatite with Y2O3-stablized zirconia, qualifying yttria (as dopant of BHA) for further in vitro and in vivo experimentation.
ISSN:0021-9983
1530-793X
DOI:10.1177/0021998308092196