Processing Route to Fully Dense Nanostructured HAp Bioceramics: From Powder Synthesis to Sintering
Abstract
The study is devoted to the processing of hydroxyapatite (HAp) nanopowder to develop fully dense nanostructured bioceramics by pressureless sintering. The sintering behavior of stoichiometric HAp prepared by hydrothermal processing was investigated by nonisothermal, two-step, and conventional sintering. By low-temperature two-step sintering (TSS), at 900°C and 850°C, with appropriate dwell time, dense bioceramics without final-stage grain growth and average grain size of 75 nm was obtained. A concept of master sintering curve was applied, enabling control of sintering process, estimation of effective activation energy for sintering of HAp nanopowder, and qualitative understanding of sintering mechanisms. According to estimated activation energy of 412.6 kJ/mol, low sintering temperature and particles' microstructure as the dominant sintering mechanism we proposed diffuse-viscous flow controlled by grain boundary diffusion. HAp nanoparticles comprising of different interior and boundary... regions as ordered/disordered microstructure are found to be of an advantage for low-temperature sintering.
Keywords:
hydroxyapatite / nanopowders / bioceramics / pressureless sintering / two-step sinteringSource:
Journal of the American Ceramic Society, 2012, 3394-3402Publisher:
- Hoboken, NJ : John Wiley & Sons
Funding / projects:
DOI: 10.1111/j.1551-2916.2012.05376.x
ISSN: 1551-2916
WoS: 000209785900001
Scopus: 2-s2.0-84868480467
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Lukić, Miodrag J. AU - Škapin, Srečo Davor AU - Marković, Smilja AU - Uskoković, Dragan PY - 2012 UR - https://dais.sanu.ac.rs/123456789/475 AB - The study is devoted to the processing of hydroxyapatite (HAp) nanopowder to develop fully dense nanostructured bioceramics by pressureless sintering. The sintering behavior of stoichiometric HAp prepared by hydrothermal processing was investigated by nonisothermal, two-step, and conventional sintering. By low-temperature two-step sintering (TSS), at 900°C and 850°C, with appropriate dwell time, dense bioceramics without final-stage grain growth and average grain size of 75 nm was obtained. A concept of master sintering curve was applied, enabling control of sintering process, estimation of effective activation energy for sintering of HAp nanopowder, and qualitative understanding of sintering mechanisms. According to estimated activation energy of 412.6 kJ/mol, low sintering temperature and particles' microstructure as the dominant sintering mechanism we proposed diffuse-viscous flow controlled by grain boundary diffusion. HAp nanoparticles comprising of different interior and boundary regions as ordered/disordered microstructure are found to be of an advantage for low-temperature sintering. PB - Hoboken, NJ : John Wiley & Sons T2 - Journal of the American Ceramic Society T1 - Processing Route to Fully Dense Nanostructured HAp Bioceramics: From Powder Synthesis to Sintering SP - 3394 EP - 3402 DO - 10.1111/j.1551-2916.2012.05376.x UR - https://hdl.handle.net/21.15107/rcub_dais_475 ER -
@article{ author = "Lukić, Miodrag J. and Škapin, Srečo Davor and Marković, Smilja and Uskoković, Dragan", year = "2012", abstract = "The study is devoted to the processing of hydroxyapatite (HAp) nanopowder to develop fully dense nanostructured bioceramics by pressureless sintering. The sintering behavior of stoichiometric HAp prepared by hydrothermal processing was investigated by nonisothermal, two-step, and conventional sintering. By low-temperature two-step sintering (TSS), at 900°C and 850°C, with appropriate dwell time, dense bioceramics without final-stage grain growth and average grain size of 75 nm was obtained. A concept of master sintering curve was applied, enabling control of sintering process, estimation of effective activation energy for sintering of HAp nanopowder, and qualitative understanding of sintering mechanisms. According to estimated activation energy of 412.6 kJ/mol, low sintering temperature and particles' microstructure as the dominant sintering mechanism we proposed diffuse-viscous flow controlled by grain boundary diffusion. HAp nanoparticles comprising of different interior and boundary regions as ordered/disordered microstructure are found to be of an advantage for low-temperature sintering.", publisher = "Hoboken, NJ : John Wiley & Sons", journal = "Journal of the American Ceramic Society", title = "Processing Route to Fully Dense Nanostructured HAp Bioceramics: From Powder Synthesis to Sintering", pages = "3394-3402", doi = "10.1111/j.1551-2916.2012.05376.x", url = "https://hdl.handle.net/21.15107/rcub_dais_475" }
Lukić, M. J., Škapin, S. D., Marković, S.,& Uskoković, D.. (2012). Processing Route to Fully Dense Nanostructured HAp Bioceramics: From Powder Synthesis to Sintering. in Journal of the American Ceramic Society Hoboken, NJ : John Wiley & Sons., 3394-3402. https://doi.org/10.1111/j.1551-2916.2012.05376.x https://hdl.handle.net/21.15107/rcub_dais_475
Lukić MJ, Škapin SD, Marković S, Uskoković D. Processing Route to Fully Dense Nanostructured HAp Bioceramics: From Powder Synthesis to Sintering. in Journal of the American Ceramic Society. 2012;:3394-3402. doi:10.1111/j.1551-2916.2012.05376.x https://hdl.handle.net/21.15107/rcub_dais_475 .
Lukić, Miodrag J., Škapin, Srečo Davor, Marković, Smilja, Uskoković, Dragan, "Processing Route to Fully Dense Nanostructured HAp Bioceramics: From Powder Synthesis to Sintering" in Journal of the American Ceramic Society (2012):3394-3402, https://doi.org/10.1111/j.1551-2916.2012.05376.x ., https://hdl.handle.net/21.15107/rcub_dais_475 .