Effects of Ag-Doping on Microstructure and Mechanical Properties of Hydroxyapatite Films


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Ag-doped hydroxyapatite films were deposited on a ZrO2 substrate using r.f. magnetron sputtering to improve the bioaffinity and mechanical properties of the hydroxyapatite. The resulting hydroxyapatite films exhibited a variation in their microstructure and mechanical properties relative to the Ag content. The variation in the (Ca, Ag)/P ratios suggested that some of the Ca2+ ions in the hydroxyapatite were replaced with Ag+ ions. After annealing at 800oC, the hydroxyapatite films showed a microstructure with crystalline nano-grains, whereas the Ag-doped hydroxyapatite films revealed the formation of crystallites embedded in the amorphous matrix. The hydroxyapatite films showed an average roughness of about 3~4nm, very smooth surface, and dense microstructure. The hardness and modulus of the films decreased with an increasing Ag content.



Key Engineering Materials (Volumes 277-279)

Edited by:

Kwang Hwa Chung, Yong Hyeon Shin, Sue-Nie Park, Hyun Sook Cho, Soon-Ae Yoo, Byung Joo Min, Hyo-Suk Lim and Kyung Hwa Yoo




S. S. Park et al., "Effects of Ag-Doping on Microstructure and Mechanical Properties of Hydroxyapatite Films", Key Engineering Materials, Vols. 277-279, pp. 113-118, 2005

Online since:

January 2005




[1] R.G. T. Geesink, K. de Groot and C.P. A. T. Klein, Clin. Orthop., Vol. 225 (1987) p.147.

[2] L. L. Hench, J. Am. Ceram. Soc. Vol. 74(7) (1991) p.1487.

[3] T. J. Berger, J. A. Sparado, S. Chapin and R. O. Becker, Antimicrob. Agents Chemother. Vol. 9 (1976) p.357.

[4] D. S. Dunn, S. Raghavan and R. G. Volz, J. Biomed. Mater. Res. Vol 27 (1993) p.895.

[5] H. W. Kim, S. Y. Lee, C. J. Bae, Y. J. Noh, H. E. Kim, H, M. Kim and J. S. Ko, Biomaterials, Vol. 24 (2003) p.3277.

[6] T. S. Kim, I. C. Kang, T. G and B. T. Lee: Mater. Trans, Vol. 44 (2003) p.1851.

[7] D. B. Chrisey, J. S. Horwitz and K. S. Grabowski, D. C. Paine and J.C. Bravman, Mater. Res. Soc. Proc., Vol. 191 (1990) p.25.

[8] J. A. Jansen, J. G. C. Wolke, S. Swann, J. P. C. M. van der Waerden and K. de Groot, Clin. Oral. Impl. Res. Vol. 4 (1993) p.28.

[9] K. van Dijk, H. G. Schaeken, C. H. M. Maree, J. Verhoeven, J. G. C. Wolke, F. H. P. M. Harbraken and J. A. Jansen, Surf. Coatings Technol., Vol. 76-77 (1995) p.206.

[10] Q. L. Feng, T. N. Kim, J. Wu, E. S. Park, J. O. Kim, D. Y. Lim and F. Z. Cui, Thin Solid Films, Vol. 335 (1998) p.214.

[11] K. van Dijk, H. G. Schaeken, J. G. C. Wolke and J. A. Jansen, Biomaterials, Vol. 17 (1996) p.405.

[12] A. Slosarczyk and J. Bialoskorski, J Mater. Sci.: Mat. in Med. Vol. 9 (1998) p.103.