Mechanical strength of extrusion freeformed calcium phosphate filaments
Mechanical strength of extrusion freeformed calcium phosphate filaments
Hydroxyapatite-tricalcium phosphate mixtures of various compositions were extruded by a solid freeforming process to form lattice structures to serve as hard tissue scaffolds. The unwelded filaments, sintered at temperatures from 1100 to 1300°C, had radii from 115 to 135 ?m and were tested in three point flexural loading using a purpose-built fixture. Flexural strength ranged from 20 to 100 MPa depending on composition and sintering temperature. Weibull moduli up to 13 were obtained. Compositions with 50% or more tri-calcium phosphate did not develop strengths much above 40 MPa and the strength of most compositions fell when the sintering temperature exceeded 1250°C. Multiple layer lattice structures were created and tested in compression
1503-1510
Yang, H. Y.
6b221f38-dec4-4a37-aa9d-e3b0e6709aa6
Chi, X. P.
975471ac-87bc-479d-80bd-48a684fb2242
Yang, S.
e0018adf-8123-4a54-b8dd-306c10ca48f1
Evans, J. R. G.
c5f05fc6-7fdc-4f8f-af7f-95725bb51ff0
May 2010
Yang, H. Y.
6b221f38-dec4-4a37-aa9d-e3b0e6709aa6
Chi, X. P.
975471ac-87bc-479d-80bd-48a684fb2242
Yang, S.
e0018adf-8123-4a54-b8dd-306c10ca48f1
Evans, J. R. G.
c5f05fc6-7fdc-4f8f-af7f-95725bb51ff0
Yang, H. Y., Chi, X. P., Yang, S. and Evans, J. R. G.
(2010)
Mechanical strength of extrusion freeformed calcium phosphate filaments.
Journal of Materials Science: Materials in Medicine, 21 (5), .
(doi:10.1007/s10856-010-4009-5).
(PMID:20145978)
Abstract
Hydroxyapatite-tricalcium phosphate mixtures of various compositions were extruded by a solid freeforming process to form lattice structures to serve as hard tissue scaffolds. The unwelded filaments, sintered at temperatures from 1100 to 1300°C, had radii from 115 to 135 ?m and were tested in three point flexural loading using a purpose-built fixture. Flexural strength ranged from 20 to 100 MPa depending on composition and sintering temperature. Weibull moduli up to 13 were obtained. Compositions with 50% or more tri-calcium phosphate did not develop strengths much above 40 MPa and the strength of most compositions fell when the sintering temperature exceeded 1250°C. Multiple layer lattice structures were created and tested in compression
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Published date: May 2010
Organisations:
Engineering Mats & Surface Engineerg Gp
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Local EPrints ID: 164981
URI: http://eprints.soton.ac.uk/id/eprint/164981
ISSN: 0957-4530
PURE UUID: 7359fe19-c798-4c0d-b8a1-5274701199ba
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Date deposited: 07 Oct 2010 13:54
Last modified: 14 Mar 2024 02:09
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Author:
H. Y. Yang
Author:
X. P. Chi
Author:
J. R. G. Evans
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