Sol-gel derived zinc doped calcium phosphate bioceramics prepared via different sintering strategies

Sopyan, Iis and -, Gunawan and -, Suryanto (2015) Sol-gel derived zinc doped calcium phosphate bioceramics prepared via different sintering strategies. Advanced Materials Research, 1115. pp. 341-344. ISSN 1022-6680

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Abstract

Sinterability of zinc doped calcium phosphate (CaP) sintered via conventional pressureless and two step sintering methods was investigated. The starting powders have been synthesized through sol-gel method with zinc concentration varied in the range of 0, 1, 4, and 10mol%. After uniaxial pressing, the compacts were sintered via conventional pressureless sintering. The dense samples were studied in terms of the phase stability, relative density, Vickers hardness, and fracture toughness. The phase of samples was hydroxyapatite and β-tricalcium phosphate. The presence of Zn caused a change in the sintering behaviour of dense calcium phosphate. Zn doping has improved relative density of 4mol% Zn-doped by 8.1% compared to undoped fired at 1300oC. The maximum fracture toughness of 1.43 MPa.m1/2 and Vickers hardness of 3.44 GPa were achieved at 1200oC by 4 mol% Zn-doped. The low Vickers hardness and fracture toughness obtained for dense samples sintered of two step sintering compared to conventional pressureless sintering is due to the low measured bulk density. This study showed that conventional pressureless sintering was beneficial in producing high toughness of Zn doped CaP.

Item Type:	Article (Journal)
Additional Information:	4809/46933
Uncontrolled Keywords:	sintering, conventional, two step, method, zinc doping, calcium phosphate, bioceramics, characterization
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA164 Bioengineering T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction
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:	08 Jan 2016 09:32
Last Modified:	18 Aug 2017 11:43
URI:	http://irep.iium.edu.my/id/eprint/46933

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