Porous titanium manufactured by a novel powder tapping method using spherical salt bead space holders: characterisation and mechanical properties

Jia, Jiangang and Siddiq, Abdur R. and Kennedy, Andrew R. (2015) Porous titanium manufactured by a novel powder tapping method using spherical salt bead space holders: characterisation and mechanical properties. Journal of the Mechanical Behavior of Biomedical Materials, 48. pp. 229-240. ISSN 1751-6161

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Abstract

Porous Ti with open porosity in the range of 70textendash80% has been made using Ti powder and a particulate leaching technique using porous, spherical, NaCl beads. By incorporating the Ti powder into a pre-existing network of salt beads, by tapping followed by compaction, salt dissolution and textquotedblleftsinteringtextquotedblright, porous structures with uniform density, pore and strut sizes and a predictable level of connectivity have been produced, showing a significant improvement on the structures made by conventional powder mixing processes. Parts made using beads with sizes in the range of 0.5-1.0 mm show excellent promise as porous metals for medical devices, showing structures and porosities similar to those of commercial porous metals used in this sector, with inter-pore connections that are similar to trabecular bone. The elastic modulus (0.86GPa) is lower than those for commercial porous metals and more closely matches that of trabecular bone and good compressive yield strength is retained (21MPa). The ability to further tailor the structure, in terms of the density and the size of the pores and interconnections has also been demonstrated by immersion of the porous components in acid.

Item Type:
Journal Article
Journal or Publication Title:
Journal of the Mechanical Behavior of Biomedical Materials
Additional Information:
This is the author’s version of a work that was accepted for publication in Journal of Mechanical Behavior of Biomedical Materials. 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 Journal of Mechanical Behavior of Biomedical Materials, 48, 2015 Doi: 10.1016/j.jmbbm.2015.04.018
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2211
Subjects:
ID Code:
87965
Deposited By:
Deposited On:
06 Oct 2017 19:36
Refereed?:
Yes
Published?:
Published
Last Modified:
27 Sep 2020 04:06