Porous alumina from protein foaming-consolidation method containing hydrothermal derived hydroxyapatite powder
Document Type
Article
Publication Date
1-1-2012
Abstract
Porous alumina containing hydrothermal derived hydroxyapatite (HA) composite were successfully fabricated via protein foaming-consolidation method. Alumina and HA powders were mixed with yolk, starch and darvan 821 A at an adjusted mass ratio to make slurry. The slurries were cast into cylindrical shaped molds and then dried for foaming and consolidation process. Subsequently, the dried bodies were burned at 600 degrees C for 1 h, followed by sintering at temperatures of 1300 - 1400 degrees C for 2 h. The porous alumina-HA composites with pore size in the range of 95-300 im and density of 2.7 - 2.9 g cm(-3) were obtained. Porosity of bodies decreased from 31.7 to 27.6 when sintering temperatures increased from 1300 to 1400 degrees C. The increasing HA-to-alumina mass ratio from 0.2 to 0.8 w/w increased compressive strength of sintered bodies from 2.3 to 10.0 MPa. XRD pattern results show intensity of tricalcium phosphate (TCP) phase increased with sintering temperatures and also found that the sintering process did not alter phases in the porous bodies.
Keywords
Alumina hydroxyapatite hydrothermal protein foaming-consolidation method
Divisions
fac_eng
Publication Title
Applied Mechanics and Materials
Volume
117-11
Additional Information
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