Browsing by Author "Alfarisi, Cory Dian"

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    INFLUENCE OF YOLK ADDITION ON PROTEIN FOAMINGCONSOLIDATION POROUS ALUMINA CONTAINING HYDROXYAPATITE NANOPOWDER
    (2014-05-21) Fadli, Ahmad; Komalasari; Alfarisi, Cory Dian
    Present paper reports the influence of yolk addition on physical properties of porous aluminahydroxyapatite composites prepared using protein foaming-consolidation method. Alumina and hydroxyapatite (HA) powders were mixed with yolk at an adjusted mass ratio to make slurries. The slurries were cast into molds and the dried for foaming- consolidation process. The dried bodies were burned at 600ºC for 1 hour, followed by sintering at temperature of 1550ºC for 2 hours. The addition of yolk into the slurry shifted the rheological properties from shear thinning behavior to a Newtonian fluid and resulted in bigger foaming capacity. The porous alumina-HA composites with shrinkages in the range of 43.3 vol.% – 58.4 vol.% were obtained. The shrinkage of bodies increased with increasing concentration of yolk. The compressive strength was 7.5 MPa at 44.6% porosity 2.6 MPa at 57% porosity
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    Preparation Of Porous Alumina-Tri Calcium Phosphate Composite Using Protein Foaming-Consolidation Method For Biomedical Application
    (2015-12-01) Fadli, Ahmad; Komalasari; Alfarisi, Cory Dian
    Porous alumina-tri calcium phosphate (TCP) composite has been prepared via protein foaming-consolidation method. Sintering temperature was varied to amend performance of the porous composite. The shrinkage of sintered bodies decreased with increasing TCP loading. The decreasing porosity of porous alumina-TCP body from 45.0 to 38.9% improved the compressive strength from 0.3 to 10.6 MPa. Increasing sintering temperature resulted in large grain size among powder particles, thus improving the compressive strength of porous bodies. The macroporous alumina-TCP composite sample produced has been proven to be highly potential for bone implant application.
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    Recent Research and Development in Porous Alumina Ceramics for Biomedical Applications
    (2015-12-01) Fadli, Ahmad; Komalasari; Alfarisi, Cory Dian
    Alumina is a bioinert ceramic with adequate mechanical properties for manufacturing of medical devices. In biomedical field, porous alumina scaffold is used for cell loading and bone grafts due to their good biocompatibility, inertness and chemical stability. Porous alumina can be prepared by a variety of methods involving starch consolidation, extrusion, fused deposition modeling (FDM), freeze drying, gel casting, magnetron sputtering and protein foaming. These techniques will produce porous alumina bodies that closely mimic with the structures of trabecular bone. Calcium phosphate coatings are an effective way to enhance the bioactivity ability of the porous alumina. The present paper gives an overview of various recent synthetic methods used to prepare porous alumina and their applications, especially for bone regeneration