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Effects of ramp rates with short holding time on the sinterability of hydroxyapatite

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dc.citedby0
dc.contributor.authorSamuel L.K.L.en_US
dc.contributor.authorTan C.Y.en_US
dc.contributor.authorRamesh S.en_US
dc.contributor.authorYap B.K.en_US
dc.contributor.authorTolouei R.en_US
dc.contributor.authorAmiriyan M.en_US
dc.contributor.authorid55443195000en_US
dc.contributor.authorid16029485400en_US
dc.contributor.authorid41061958200en_US
dc.contributor.authorid26649255900en_US
dc.contributor.authorid36706646500en_US
dc.contributor.authorid36705737200en_US
dc.date.accessioned2023-12-29T07:46:49Z
dc.date.available2023-12-29T07:46:49Z
dc.date.issued2012
dc.description.abstractHydroxyapatite (HA) is by far the closest match to the human bone in terms of chemical composition. Furthermore, HA boasts excellent biocompatibility thus earning its reputation for human bone replacement. However, HA lacks desirable mechanical properties (i.e. hardness, fracture toughness, etc.). Due to the poor heat conductivity of ceramics, it is hypothesized that HA when sintered via conventional pressureless sintering, smaller ramp rates are advantageous as oppose to larger ramp rates. These advantages can be observed as improved densification along with improved mechanical properties. In the present work, the sintering profile for the HA green bodies were held at 1 minute in comparison to the usual 2 hours holding time. The applied ramp rates were 2 �C/min, 5 �C/min and 10 �C/min. Sintering temperatures were set to 1000, 1100, 1200, and 1300 �C. Sample characterization was then reviewed in the aspects of phase stability, % shrinkage, bulk and relative density, Young's modulus, Vickers hardness, as well as fracture toughness. The results revealed that sintering with shorter holding time yielded an improvement in the mechanical properties of HA. It was observed that sintering HA with a 2 �C/min ramp rate does not result in the formation of extrageneous phases even when sintered to 1300 �C. Similarly at 2 �C/min and 1300 �C, densification was observed to be 99.05 %. In addition, Young's modulus recorded its highest value (117.03 GPa) when sintered with a ramp rate of 2�C/min. It was also observed that sintering HA at a ramp rate of 2�C/min produced a hardness value of 5.88 GPa (improvement of 0.68 GPa when compared with 2 hours holding time). � (2012) Trans Tech Publications, Switzerland.en_US
dc.description.natureFinalen_US
dc.identifier.doi10.4028/www.scientific.net/AMR.545.229
dc.identifier.epage234
dc.identifier.scopus2-s2.0-84868223460
dc.identifier.spage229
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84868223460&doi=10.4028%2fwww.scientific.net%2fAMR.545.229&partnerID=40&md5=699214a978e6295808f702bfa3fbf271
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/30336
dc.identifier.volume545
dc.pagecount5
dc.sourceScopus
dc.sourcetitleAdvanced Materials Research
dc.subjectCa <sub>10</sub>(PO <sub>4</sub>) <sub>6</sub>(OH) <sub>2</sub>
dc.subjectHA
dc.subjectHydroxyapatite
dc.subjectRamp rate
dc.subjectShort holding time
dc.subjectSintering
dc.subjectHA
dc.subjectHydroxyapatite
dc.subjectRamp rates
dc.subjectShort holdings
dc.subjectSintering
dc.titleEffects of ramp rates with short holding time on the sinterability of hydroxyapatiteen_US
dc.typeReviewen_US
dspace.entity.typePublication
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