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Processing of Injection Moulded of Synthesized HAp by Single Step Wick-Debinding and Sintering

The present study was conducted to investigate the possibility of merging the wick-debinding and sintering of injection-molded ceramic parts into a single-step operation. In this study, the synthesized hydroxyapatite (HAp) feedstock prepared was injection moulded according to ASTM standard C1424-10 to produce green specimens. The green specimens were then debound and sintered through a single step wick-debinding and sintering process by using alumina powder as an embedment agent. The principle of this method is that it carried out at a temperature where the binder is melt, allowing it to flow out of the specimens into pores in the contacting of substrate. Once, the binder is successfully removed from the specimens, sintering process is took place to bond the particle together leading to densification of sintered specimens. From the results, it shows that the binders were successfully removed from the green specimens by capillary suction of the molten binder and single phase of HAp was presented at the sintering temperature of 1000°C.