Mechanical Properties of Microwave Sintered 60YSZ-Al2O3/10HAP Bioceramics Composites


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Microwave heating technology promising shorter processing times and less energy consumption beneficial for economic perspective with improved properties and better microstructural control. This study focussed on microwave sintered bioceramics material of 60YSZ-Al2O3/10HAP mixture fabricated by powder metallurgy route. The study was conducted based on three different sintering temperatures, starting with 900 °C, 1000°C ended with 1100°C. Mechanical properties of materials such as porosity, density, hardness and compressive strength were then determined for each composites. Results showed that lowest porosity was obtained at 1000°C which promoting to higher density, hardness and compressive strength. However, the increasing sintering temperature up to 1100 °C was initiated the decomposition of HAP and constitutes the formation of CaZrO3 determined by X-ray Diffraction (XRD) analysis. Microstructure characterization by Scanning Electron Microscope (SEM) observed the growth of large particles and pores result in excessive grain coarsening. Better sinterability was achieved through an adequate sintering temperature of 1000°C with no reaction reported between HA and ZrO2 during the sintering process facilitate by microwave hybrid heating. The pores was found to be interconnected for each composites via microwave heating expected to be useful for biomedical application which was favorable to osteo-integration.



Edited by:

Bale V. Reddy, Shishir Kumar Sahu, A. Kandasamy and Manuel de La Sen




M.R.N. Liyana et al., "Mechanical Properties of Microwave Sintered 60YSZ-Al2O3/10HAP Bioceramics Composites", Applied Mechanics and Materials, Vol. 627, pp. 18-23, 2014

Online since:

September 2014




* - Corresponding Author

[1] D. M. BC Muddugangahar, GS Amarnath, Siddhi Tripathi, Sushismita Dikshit, Biomaterials for Dental Implants : An Overview, Int. J. Oral Implantol. Clin. Res., vol. 2, no. April, p.13–24, (2011).

[2] S. Kanchana and S. Hussain, Zirconia a Bio-inert Implant Material, J. Dent. Med. Sci., vol. 12, no. 6, p.66–67, (2013).

[3] E. Sahin, Synthesis and Characteriztion of Hydroxyapatite-Alumina-Zirconia Biocomposites, Izmir Institute of Technology, (2006).

[4] Y. Nayak, Hydroxyapatite - TZP Composites : Processing, Mechanical Properties, Microstructure and In-Vitro, (2010).

[5] Y. -M. Kong, C. -J. Bae, S. -H. Lee, H. -W. Kim, and H. -E. Kim, Improvement in biocompatibility of ZrO2-Al2O3 nano-composite by addition of HA., Biomaterials, vol. 26, no. 5, p.509–17, Feb. (2005).

[6] I. Brook, C. Freeman, S. Grubb, N. Cummins, D. Curran, C. Reidy, S. Hampshire, and M. Towler, Biological evaluation of nano-hydroxyapatite-zirconia (HA-ZrO2) composites and strontium-hydroxyapatite (Sr-HA) for load-bearing applications., J. Biomater. Appl., vol. 27, no. 3, p.291–8, Sep. (2012).


[7] D. J. Curran, T. J. Fleming, M. R. Towler, and S. Hampshire, Mechanical properties of hydroxyapatite-zirconia compacts sintered by two different sintering methods, J. Mater. Sci., (2010).

[8] C. Ângela, M. Volpato, L. Gustavo, D. A. Garbelotto, M. C. Fredel, F. Bondioli, and R. Emilia, Application of Zirconia in Dentistry : Biological , Mechanical and Optical Considerations, in Advances in Ceramics, 2011, p.550.

[9] N. A. Travitzky, A. Goldstein, O. Avsian, and A. Singurindi, Microwave sintering and mechanical properties of Y-TZP / 20 wt . %, vol. 286, p.225–229, (2000).


[10] A. Thuault, E. Savary, J. -C. Hornez, G. Moreau, M. Descamps, S. Marinel, and A. Leriche, Improvement of the hydroxyapatite mechanical properties by direct microwave sintering in single mode cavity, J. Eur. Ceram. Soc., vol. 34, no. 7, p.1865–1871, Jul. (2014).


[11] C. Vasconcelos, New Challenges in the Sintering of HA / ZrO 2 Composites, vol. 2, (2012).

[12] H. Guo, K. A. Khor, Y. C. Boey, and X. Miao, Laminated and functionally graded hydroxyapatite/ yttria stabilized tetragonal zirconia composites fabricated by spark plasma sintering , J. Biomater., vol. 24, (2003).