Rheological Properties of HA Slurry for the Production of Bone Scaffolds by Layer Manufacturing

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dc.contributor.author Jones, Jason B. en
dc.contributor.author Tallis, Andrea en
dc.contributor.author Tillotta, V. en
dc.contributor.author Moroz, Adam en
dc.contributor.author Wimpenny, D. I. (David I.) en
dc.date.accessioned 2012-07-10T15:09:24Z
dc.date.available 2012-07-10T15:09:24Z
dc.date.issued 2007
dc.identifier.citation Jones, J.B. et al. (2007) Rheological Properties of HA Slurry for the Production of Bone Scaffolds by Layer Manufacturing. 8th National Conference on Rapid Design, Prototyping and Manufacture, Ghent, Belgium, en
dc.identifier.uri http://hdl.handle.net/2086/6328
dc.description.abstract In recent years, innovative methods have been developed for the repair and regeneration of damaged and diseased bone tissue. Ceramic bio-scaffolds provide advantageous features as compared to other materials. The potential exists to use a slurry* composed of silica and hydroxyapatite (HA) which can be extruded through a controlled rate/pressure nozzle for rapid and accurate manufacturing of the green body of the scaffold. In order to fine-tune the slurry to be used in this process analysis of the HA particles and rheological characterisation and testing of a range of slurry formulations was undertaken. The measurement of the viscosity, its time dependent behaviour and the strength of the internal structure of the slurry are vital tools to characterize the suitability of ceramic slurry for the extrusion process. A plotting trial was also conducted with the objective of examining the behaviour of the different formulations under a range of pressure/extrusion rate parameters. The composition of the slurry formulations was in the range of 30 to 40 weight % of HA and was eventually fine-tuned to 35% by weight HA, which gave the best performance from the point of view of viscosity, oscillation, and extrusion properties. It was observed that the slurries behaved in non-Newtonian, shear-dependent complex modes. en
dc.language.iso en en
dc.subject Direct writing en
dc.subject Additive Manufacturing en
dc.subject 3D Printing en
dc.subject rheology en
dc.subject medical implants en
dc.subject Mass customization en
dc.title Rheological Properties of HA Slurry for the Production of Bone Scaffolds by Layer Manufacturing en
dc.type Article en
dc.type Conference en
dc.researchgroup Additive Manufacturing Technology Group en
dc.peerreviewed Yes en


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