Effects of powder synthesis method on the sinterability of hydroxyapatite

The sinterability of hydroxyapatite (HA) powder synthesized through a novel wet chemical method (HAp) and a wet mechanochemical method (HAwm) was investigated over a temperature range of 1000oC to 1400oC in terms of phase stability, bulk density, hardness and fracture toughness. The results indicate...

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Main Authors:	K. L., Aw, Ranna, Tolouei, Singh, Ramesh, Tan, Chou Yong, W,, H. Yeo, H., Kelvin, Iis, Sopyan, Teng, Wan Dung
Format:	Article
Language:	English
Published:	Trans Tech Publications, Switzerland 2011
Subjects:	TS Manufactures
Online Access:	http://irep.iium.edu.my/12221/ http://irep.iium.edu.my/12221/ http://irep.iium.edu.my/12221/ http://irep.iium.edu.my/12221/1/AMR.264-265.1538_4.pdf

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recordtype	eprints
spelling	iium-122212012-02-29T09:12:31Z http://irep.iium.edu.my/12221/ Effects of powder synthesis method on the sinterability of hydroxyapatite K. L., Aw Ranna, Tolouei Singh, Ramesh Tan, Chou Yong W,, H. Yeo H., Kelvin Iis, Sopyan Teng, Wan Dung TS Manufactures The sinterability of hydroxyapatite (HA) powder synthesized through a novel wet chemical method (HAp) and a wet mechanochemical method (HAwm) was investigated over a temperature range of 1000oC to 1400oC in terms of phase stability, bulk density, hardness and fracture toughness. The results indicated that the sinterability of HAp powder were significantly better than HAwm powder. Moreover, the XRD traces of HAwm sintered samples showed signs of decomposition into TTCP when sintered at 1300oC and above. Densification of ~98% of theoretical density was attained by HAp compacts at 1100oC while the HAwm compacts exhibited only ~96% of theoretical density even at 1350oC with no significant increase of density at 1400oC. The Vickers hardness of HAp showed increasing trend for temperature range of 1000oC to 1100oC with the compacts attaining HV of ~7 GPa at 1100oC. Subsequently, the hardness decreased with increasing sintering temperature though the value does not dropped below ~5 GPa. Similarly, HAwm compacts showed an increasing trend from 1000oC to 1300oC with the largest HV attained was ~4.57 GPa. Further increased in sintering temperature resulted in the decreased of Vicker’s hardness. Moreover, the HAp samples reached a maximum fracture toughness of ~0.9 MPam1/2 at 1050oC while the HAwm attained maximum KIc of only ~0.7 MPam1/2 at 1300oC. Trans Tech Publications, Switzerland 2011-06 Article NonPeerReviewed application/pdf en http://irep.iium.edu.my/12221/1/AMR.264-265.1538_4.pdf K. L., Aw and Ranna, Tolouei and Singh, Ramesh and Tan, Chou Yong and W,, H. Yeo and H., Kelvin and Iis, Sopyan and Teng, Wan Dung (2011) Effects of powder synthesis method on the sinterability of hydroxyapatite. Advanced Materials Research, 264/5. pp. 1538-1544. ISSN 1022-6680 http://www.scientific.net/AMR.264-265.1538 10.4028/www.scientific.net/AMR.264-265.1538
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TS Manufactures
spellingShingle	TS Manufactures K. L., Aw Ranna, Tolouei Singh, Ramesh Tan, Chou Yong W,, H. Yeo H., Kelvin Iis, Sopyan Teng, Wan Dung Effects of powder synthesis method on the sinterability of hydroxyapatite
description	The sinterability of hydroxyapatite (HA) powder synthesized through a novel wet chemical method (HAp) and a wet mechanochemical method (HAwm) was investigated over a temperature range of 1000oC to 1400oC in terms of phase stability, bulk density, hardness and fracture toughness. The results indicated that the sinterability of HAp powder were significantly better than HAwm powder. Moreover, the XRD traces of HAwm sintered samples showed signs of decomposition into TTCP when sintered at 1300oC and above. Densification of ~98% of theoretical density was attained by HAp compacts at 1100oC while the HAwm compacts exhibited only ~96% of theoretical density even at 1350oC with no significant increase of density at 1400oC. The Vickers hardness of HAp showed increasing trend for temperature range of 1000oC to 1100oC with the compacts attaining HV of ~7 GPa at 1100oC. Subsequently, the hardness decreased with increasing sintering temperature though the value does not dropped below ~5 GPa. Similarly, HAwm compacts showed an increasing trend from 1000oC to 1300oC with the largest HV attained was ~4.57 GPa. Further increased in sintering temperature resulted in the decreased of Vicker’s hardness. Moreover, the HAp samples reached a maximum fracture toughness of ~0.9 MPam1/2 at 1050oC while the HAwm attained maximum KIc of only ~0.7 MPam1/2 at 1300oC.
format	Article
author	K. L., Aw Ranna, Tolouei Singh, Ramesh Tan, Chou Yong W,, H. Yeo H., Kelvin Iis, Sopyan Teng, Wan Dung
author_facet	K. L., Aw Ranna, Tolouei Singh, Ramesh Tan, Chou Yong W,, H. Yeo H., Kelvin Iis, Sopyan Teng, Wan Dung
author_sort	K. L., Aw
title	Effects of powder synthesis method on the sinterability of hydroxyapatite
title_short	Effects of powder synthesis method on the sinterability of hydroxyapatite
title_full	Effects of powder synthesis method on the sinterability of hydroxyapatite
title_fullStr	Effects of powder synthesis method on the sinterability of hydroxyapatite
title_full_unstemmed	Effects of powder synthesis method on the sinterability of hydroxyapatite
title_sort	effects of powder synthesis method on the sinterability of hydroxyapatite
publisher	Trans Tech Publications, Switzerland
publishDate	2011
url	http://irep.iium.edu.my/12221/ http://irep.iium.edu.my/12221/ http://irep.iium.edu.my/12221/ http://irep.iium.edu.my/12221/1/AMR.264-265.1538_4.pdf
first_indexed	2023-09-18T20:21:27Z
last_indexed	2023-09-18T20:21:27Z
_version_	1777408134557466624

Effects of powder synthesis method on the sinterability of hydroxyapatite

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