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Title: Microstrain in hydroxyapatite carbon nanotube composites
Authors: Kealley, CS
Elcombe, MM
van Riessen, A
Keywords: Strains
Composite materials
Synchrotron radiation
Issue Date: 15-Jan-2008
Publisher: Wiley-Blackwell
Citation: Kealley, C., Elcombe, M., & van Riessen, A. (2008). Microstrain in hydroxyapatite carbon nanotube composites. Journal of Synchrotron Radiation, 15, 86-90. doi:10.1107/S0909049507055720
Abstract: Synchrotron radiation diffraction data were collected from hydroxyapatite–carbon nanotube bioceramic composites to determine the crystallite size and to measure changes in non-uniform strain. Estimates of crystallite size and strain were determined by line-profile fitting of discrete peaks and these were compared with a Rietveld whole-pattern analysis. Overall the two analysis methods produced very similar numbers. In the commercial hydroxyapatite material, one reflection in particular, (0 2 3), has higher crystallite size and lower strain values in comparison with laboratory-synthesized material. This could indicate preferential crystal growth in the [0 2 3] direction in the commercial material. From the measured strains in the pure material and the composite, there was a degree of bonding between the matrix and strengthening fibres. However, increasing the amount of carbon nanotubes in the composite has increased the strain in the material, which is undesirable for biomedical implant applications. © 2008, Wiley-Blackwell
Gov't Doc #: 1180
ISSN: 0909-0495
Appears in Collections:Journal Articles

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