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Porous poly-ether ether ketone (PEEK) manufactured by a novel powder route using near-spherical salt bead porogens: characterisation and mechanical properties

Siddiq, Abdur R.; Kennedy, Andrew R.

Authors

Abdur R. Siddiq

Andrew R. Kennedy



Abstract

Porous PEEK structures with approximately 85% open porosity have been made using PEEK-OPTIMA® powder and a particulate leaching technique using porous, near-spherical, sodium chloride beads. A novel manufacturing approach is presented and compared with a traditional dry mixing method. Irrespective of the method used, the use of near-spherical beads with a fairly narrow size range results in uniform pore structures. However the integration, by tapping, of fine PEEK into a pre-existing network salt beads, followed by compaction and “sintering”, produces porous structures with excellent repeatability and homogeneity of density; more uniform pore and strut sizes; an improved and predictable level of connectivity via the formation of “windows” between the cells; faster salt removal rates and lower levels of residual salt. Although tapped samples show a compressive yield stress N1 MPa and stiffness N30 MPa for samples with 84% porosity, the presence of windows in the cell walls means that tapped structures show lower strengths and lower stiffnesses than equivalent structures made by mixing.

Citation

Siddiq, A. R., & Kennedy, A. R. (2015). Porous poly-ether ether ketone (PEEK) manufactured by a novel powder route using near-spherical salt bead porogens: characterisation and mechanical properties. Materials Science and Engineering: C, 47, https://doi.org/10.1016/j.msec.2014.11.044

Journal Article Type Article
Acceptance Date Nov 11, 2014
Online Publication Date Nov 13, 2014
Publication Date Feb 1, 2015
Deposit Date Jun 28, 2016
Publicly Available Date Jun 28, 2016
Journal Materials Science and Engineering: C
Print ISSN 0928-4931
Electronic ISSN 0928-4931
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 47
DOI https://doi.org/10.1016/j.msec.2014.11.044
Public URL http://eprints.nottingham.ac.uk/id/eprint/34449
Publisher URL http://www.sciencedirect.com/science/article/pii/S0928493114007450
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0

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PEEK Paper MSE-C.pdf (1.3 Mb)
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0





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