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  • PEEK Paper MSE-C

    Rights statement: This is the author’s version of a work that was accepted for publication in Materials Science and Engineering C. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Materials Science and Engineering C, 47, 2015 DOI: 10.1016/j.msec.2014.11.044

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    Available under license: CC BY-NC-ND: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License

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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

Research output: Contribution to journalJournal articlepeer-review

Published
<mark>Journal publication date</mark>1/02/2015
<mark>Journal</mark>Materials Science and Engineering: C
Volume47
Number of pages9
Pages (from-to)180-188
Publication StatusPublished
Early online date13/11/14
<mark>Original language</mark>English

Abstract

Porous PEEK structures with approximately 85% open porosity have been made using PEEK-OPTIMAtextregistered 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 textquotedblleftsinteringtextquotedblright, 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 textquotedblleftwindowstextquotedblright 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.

Bibliographic note

This is the author’s version of a work that was accepted for publication in Materials Science and Engineering C. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Materials Science and Engineering C, 47, 2015 DOI: 10.1016/j.msec.2014.11.044