Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - High-strength nanograined and translucent hydroxyapatite monoliths via continuous hydrothermal synthesis and optimized spark plasma sintering
AU - Chaudhry, A.A.
AU - Yan, H.
AU - Gong, K.
AU - Inam, F.
AU - Viola, G.
AU - Reece, M.J.
AU - Goodall, J.B.M.
AU - Ur Rehman, I.
AU - McNeil-Watson, F.K.
AU - Corbett, J.C.W.
AU - Knowles, J.C.
AU - Darr, J.A.
PY - 2011
Y1 - 2011
N2 - The synthesis of high-strength, completely dense nanograined hydroxyapatite (bioceramic) monoliths is a challenge as high temperatures or long sintering times are often required. In this study, nanorods of hydroxyapatite (HA) and calcium-deficient HA (made using a novel continuous hydrothermal flow synthesis method) were consolidated using spark plasma sintering (SPS) up to full theoretical density in ∼5 min at temperatures up to 1000 °C. After significant optimization of the SPS heating and loading cycles, fully dense HA discs were obtained which were translucent, suggesting very high densities. Significantly high three-point flexural strength values for such materials (up to 158 MPa) were measured. Freeze-fracturing of disks followed by scanning electron microscopy investigation revealed selected samples possessed sub-200 nm sized grains and no visible pores, suggesting they were fully dense. © 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
AB - The synthesis of high-strength, completely dense nanograined hydroxyapatite (bioceramic) monoliths is a challenge as high temperatures or long sintering times are often required. In this study, nanorods of hydroxyapatite (HA) and calcium-deficient HA (made using a novel continuous hydrothermal flow synthesis method) were consolidated using spark plasma sintering (SPS) up to full theoretical density in ∼5 min at temperatures up to 1000 °C. After significant optimization of the SPS heating and loading cycles, fully dense HA discs were obtained which were translucent, suggesting very high densities. Significantly high three-point flexural strength values for such materials (up to 158 MPa) were measured. Freeze-fracturing of disks followed by scanning electron microscopy investigation revealed selected samples possessed sub-200 nm sized grains and no visible pores, suggesting they were fully dense. © 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
KW - CHFS
KW - Hydroxyapatite
KW - Nanobioceramics
KW - Nanorods
KW - SPS
KW - bioceramics
KW - hydroxyapatite
KW - nanomaterial
KW - article
KW - freezing
KW - heating
KW - powder
KW - priority journal
KW - shear strength
KW - thermostability
KW - Hydroxyapatites
KW - Light
KW - Materials Testing
KW - Nanotubes
KW - Particle Size
KW - Plasma Gases
KW - Scattering, Radiation
KW - Temperature
KW - Water
KW - X-Ray Diffraction
U2 - 10.1016/j.actbio.2010.09.029
DO - 10.1016/j.actbio.2010.09.029
M3 - Journal article
VL - 7
SP - 791
EP - 799
JO - Acta Biomaterialia
JF - Acta Biomaterialia
SN - 1742-7061
IS - 2
ER -