Synthesis of high fracture toughness of hydroxyapatite bioceramics

Tan, Chou Yong and Singh, Ramesh and Ranna, Tolouei and Iis, Sopyan and Teng, Wan Dung (2011) Synthesis of high fracture toughness of hydroxyapatite bioceramics. Advanced Materials Research, 264/5. pp. 1849-1855. ISSN 1022-6680

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Abstract

The sinterability of magnesium oxide (MgO) doped hydroxyapatite (HA) ranging from 1 to 10 wt% when sintered at 1150°C was investigated in terms of phase stability, bulk density, Young's modulus, Vickers hardness and fracture toughness. The addition of up to 1 wt% MgO as sintering additive was found to be beneficial in promoting the densification of HA. Further addition of MgO in the HA matrix would deteriorate its densification properties. Similar results were observed for its stiffness and Vickers hardness. Nevertheless, the fracture toughness of HA was greatly enhanced by the incorporation of 5 wt% MgO. An increased toughness of up to 35% was obtained for the MgOdoped HA when compared to the undoped HA. This improvement is associated to the smaller grain size of the doped sample as compared to the undoped HA.

Item Type:	Article (Journal)
Additional Information:	4809/12224
Uncontrolled Keywords:	Hydroxyapatite; Magnesium oxide (MgO); Mechanical properties; Sinterability
Subjects:	T Technology > TS Manufactures
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	PROF. DR. IIS SOPYAN
Date Deposited:	24 Feb 2012 11:04
Last Modified:	08 May 2012 14:34
URI:	http://irep.iium.edu.my/id/eprint/12224

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