Nano- and microstructure of short fibre reinforced and unreinforced hydroxyaptite.
Hydroxyapatite (HA) and alumina short fibre reinforced hydroxyapatite (Al2O3/HA) were processed by uniaxial pressing of green bodies with 200 MPa and sintering in air for 4 hours at 1150 degrees C, 1175 degrees C and 1200 degrees C. The phase composition of the materials were investigated by transmission electron microscopy and Raman spectroscopy. Results were supported by X-ray diffraction. Amorphous calcium phosphate could be found either as islands in unreinforced HA or at the grain boundaries in the Al2O3/HA composite. The reinforced calcium phosphate contains an enhanced amount of decomposition products like tetracalcium phosphate.
Dorner-Reisel
A
A
Institut für Keramische Werkstoffe, TU Bergakademie Freiberg, Deutschland. dorner@ikw.tu-freiberg.de
Klemm
V
V
Irmer
G
G
Müller
E
E
D000537:Aluminum Oxide; D018786:Bone Substitutes; D002130:Calcium Phosphates; D017886:Durapatite; D006801:Humans; D008855:Microscopy, Electron, Scanning; D019016:Mineral Fibers; D036103:Nanotechnology; D019736:Prostheses and Implants; D013059:Spectrum Analysis, Raman; D013499:Surface Properties; D016474:Weight-Bearing
D018786:Bone Substitutes; D002130:Calcium Phosphates; D019016:Mineral Fibers; C519480:amorphous calcium phosphate; D017886:Durapatite; D000537:Aluminum Oxide