Powder injection moulding of synthesized hydroxyapatite powder from clamshell / Nurul Huda M. Ali

Hydroxyapatite (HAp) is one of the most versatile bioceramic materials since it is widely used in biomedical and dentistry applications. This research focused on the effect of pH and calcination temperature on synthesized HAp powder from clamshells via chemical precipitation method. Besides that, th...

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Main Author:	M. Ali, Nurul Huda
Format:	Thesis
Language:	English
Published:	2015
Subjects:	Molding and casting Chemical engineering
Online Access:	https://ir.uitm.edu.my/id/eprint/40096/1/40096.pdf
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id	my-uitm-ir.40096
record_format	uketd_dc
spelling	my-uitm-ir.400962021-08-25T08:48:06Z Powder injection moulding of synthesized hydroxyapatite powder from clamshell / Nurul Huda M. Ali 2015-08 M. Ali, Nurul Huda Molding and casting Chemical engineering Hydroxyapatite (HAp) is one of the most versatile bioceramic materials since it is widely used in biomedical and dentistry applications. This research focused on the effect of pH and calcination temperature on synthesized HAp powder from clamshells via chemical precipitation method. Besides that, the process of PIM using synthesized HAp powder mixed with PS based binder system had studied. The effect of sintering temperatures on the as-sintered HAp specimens had evaluated for its physical and mechanical properties. The process to synthesize HAp powder involves calcination of clamshells powder followed by the titration method using low concentration of phosphoric acid. Based on the analysis, synthesized HAp powder at the temperature of 850°C with the final pH solution of 6.5 has similar characterizations with commercial HAp powder. Then, the process is followed by a green processing route via PIM technique to produce the assintered HAp specimen. From the results attained, it shows that synthesized HAp feedstock prepared with the powder loading of 60 vol.% shows pseudo-plastic behavior. The feedstock was successfully injection moulded according to ASTM standard CI 424- 10 to produce green specimens at the temperature of 200°C with the pressure range from 4 to 7 bars. The green specimens were then successfully debound and sintered through single step wick-debinding and sintering process using alumina powder as an embedment agent. The sintered specimens were than evaluated on physical and mechanical properties. From the results obtained, sintering temperature above 1100°C is not preferable since HAp is start to decompose and forming TCP which not suitable for load bearing applications. 2015-08 Thesis https://ir.uitm.edu.my/id/eprint/40096/ https://ir.uitm.edu.my/id/eprint/40096/1/40096.pdf text en public masters Universiti Teknologi MARA Faculty of Chemical Engineering Subuki, Istikamah (Dr.)
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Subuki, Istikamah (Dr.)
topic	Molding and casting Chemical engineering
spellingShingle	Molding and casting Chemical engineering M. Ali, Nurul Huda Powder injection moulding of synthesized hydroxyapatite powder from clamshell / Nurul Huda M. Ali
description	Hydroxyapatite (HAp) is one of the most versatile bioceramic materials since it is widely used in biomedical and dentistry applications. This research focused on the effect of pH and calcination temperature on synthesized HAp powder from clamshells via chemical precipitation method. Besides that, the process of PIM using synthesized HAp powder mixed with PS based binder system had studied. The effect of sintering temperatures on the as-sintered HAp specimens had evaluated for its physical and mechanical properties. The process to synthesize HAp powder involves calcination of clamshells powder followed by the titration method using low concentration of phosphoric acid. Based on the analysis, synthesized HAp powder at the temperature of 850°C with the final pH solution of 6.5 has similar characterizations with commercial HAp powder. Then, the process is followed by a green processing route via PIM technique to produce the assintered HAp specimen. From the results attained, it shows that synthesized HAp feedstock prepared with the powder loading of 60 vol.% shows pseudo-plastic behavior. The feedstock was successfully injection moulded according to ASTM standard CI 424- 10 to produce green specimens at the temperature of 200°C with the pressure range from 4 to 7 bars. The green specimens were then successfully debound and sintered through single step wick-debinding and sintering process using alumina powder as an embedment agent. The sintered specimens were than evaluated on physical and mechanical properties. From the results obtained, sintering temperature above 1100°C is not preferable since HAp is start to decompose and forming TCP which not suitable for load bearing applications.
format	Thesis
qualification_level	Master's degree
author	M. Ali, Nurul Huda
author_facet	M. Ali, Nurul Huda
author_sort	M. Ali, Nurul Huda
title	Powder injection moulding of synthesized hydroxyapatite powder from clamshell / Nurul Huda M. Ali
title_short	Powder injection moulding of synthesized hydroxyapatite powder from clamshell / Nurul Huda M. Ali
title_full	Powder injection moulding of synthesized hydroxyapatite powder from clamshell / Nurul Huda M. Ali
title_fullStr	Powder injection moulding of synthesized hydroxyapatite powder from clamshell / Nurul Huda M. Ali
title_full_unstemmed	Powder injection moulding of synthesized hydroxyapatite powder from clamshell / Nurul Huda M. Ali
title_sort	powder injection moulding of synthesized hydroxyapatite powder from clamshell / nurul huda m. ali
granting_institution	Universiti Teknologi MARA
granting_department	Faculty of Chemical Engineering
publishDate	2015
url	https://ir.uitm.edu.my/id/eprint/40096/1/40096.pdf
_version_	1783734561931264000

Powder injection moulding of synthesized hydroxyapatite powder from clamshell / Nurul Huda M. Ali

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