Porous alumina from protein foaming-consolidation method containing hydrothermal derived hydroxyapatite powder

Fadli, A. and Sopyan, I. and Ramesh, S. (2012) Porous alumina from protein foaming-consolidation method containing hydrothermal derived hydroxyapatite powder. Applied Mechanics and Materials, 117-11. pp. 782-785. ISSN 3037852801

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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.

Item Type: Article
Additional Information: you can e-mail to me for the full text of my jurnal at ramesh79@um.edu.my
Uncontrolled Keywords: Alumina hydroxyapatite hydrothermal protein foaming-consolidation method
Subjects: T Technology > TS Manufactures
Divisions: Faculty of Engineering
Depositing User: Mr. Mohammed Salim Abd Rahman
Date Deposited: 03 Jul 2013 02:02
Last Modified: 03 Jul 2013 02:02
URI: http://eprints.um.edu.my/id/eprint/6302

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