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The effects of calcium-to-phosphorus ratio on the densification and mechanical properties of hydroxyapatite ceramic

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dc.citedby58
dc.contributor.authorTan C.Y.en_US
dc.contributor.authorSingh R.en_US
dc.contributor.authorTeh Y.C.en_US
dc.contributor.authorTan Y.M.en_US
dc.contributor.authorYap B.K.en_US
dc.contributor.authorid16029485400en_US
dc.contributor.authorid41061958200en_US
dc.contributor.authorid55877640300en_US
dc.contributor.authorid55877494100en_US
dc.contributor.authorid26649255900en_US
dc.date.accessioned2023-05-29T06:02:14Z
dc.date.available2023-05-29T06:02:14Z
dc.date.issued2015
dc.descriptionDensity (specific gravity); Elastic moduli; Fracture; Fracture toughness; Hydroxyapatite; Mechanical properties; Orthophosphoric acid; Particle size; Phosphorus; Powders; Precipitation (chemical); Sintering; Toughness; Vickers hardness; Calcium deficients; High temperature; Hydroxyapatite ceramics; Microstructural examination; NO decomposition; Relative density; Wet-chemical precipitation; Young's Modulus; Calciumen_US
dc.description.abstractIn this work, hydroxyapatite (HA) powders were synthesized using calcium hydroxide Ca(OH)2 and orthophosphoric acid H3PO4 via wet chemical precipitation method in aqueous medium. Calcium-to-phosphorus (Ca/P) ratio was set to 1.57, 1.67, 1.87 that yield calcium-deficient HA, stoichiometric HA, and calcium-rich HA, respectively. These synthesized HA powders (having different Ca/P ratio) were characterized in terms of particle size and microstructural examination. Then, the densification and mechanical properties of the calcium-deficient HA, stoichiometric HA, and calcium-rich HA were evaluated from 1000 to 1350�C. Experimental results have shown that no decomposition of hydroxyapatite phase was observed for stoichiometric HA (Ca/P = 1.67) and calcium-deficient HA (Ca/P = 1.57) despite sintered at high temperature of 1300�C. However, calcium oxide (CaO) was detected for calcium-rich HA (Ca/P = 1.87) when samples sintered at the same temperature. The study revealed that the highest mechanical properties were found in stoichiometric HA samples sintered at 1100-1150�C, having relative density of ?99.8%, Young's modulus of ?120 GPa, Vickers hardness of ?7.23 GPa, and fracture toughness of ?1.22 MPam1/2. � 2014 The American Ceramic Society.en_US
dc.description.natureFinalen_US
dc.identifier.doi10.1111/ijac.12249
dc.identifier.epage227
dc.identifier.issue1
dc.identifier.scopus2-s2.0-84920696823
dc.identifier.spage223
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84920696823&doi=10.1111%2fijac.12249&partnerID=40&md5=4bb48db5dccce3bec6f632527fec88d5
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/22579
dc.identifier.volume12
dc.publisherBlackwell Publishing Ltden_US
dc.sourceScopus
dc.sourcetitleInternational Journal of Applied Ceramic Technology
dc.titleThe effects of calcium-to-phosphorus ratio on the densification and mechanical properties of hydroxyapatite ceramicen_US
dc.typeArticleen_US
dspace.entity.typePublication
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