Fabrication and characterization of HAp /Al2O3 composite cating on titanium substrate

Zhou-Cheng Wang, Yong-Jin Ni, Jin-Cong Huang

Department of Chemical and Biological Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen.
Department of Chemical and Biological Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China.

DOI: 10.4236/jbise.2008.13032                

Abstract

HAp/Al2O3 composite coating was fabricated onto micro-arc oxidized titanium substrate using a combination of electrophoretic depo-sition and reaction bonding process. SEM, EDS and XRD were employed to characterize the titanium substrate and as-prepared coat-ings. The interfacial bonding strength of the sintered composite coating was tested by shear strength testing experiment. Results show that the green form composite coating can be easily sintered with no cracks and de-composition at 850℃, the bonding strength to the substrate is significantly improved com-pared with the single HAp coating.

Keywords

Hydroxyapatite; Composite coating; Electrophoretic deposition; Reaction bonding process

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	M. Wei, A. J. Ruys, M. V. Swain, B. K. Milthorpe, C. C. Sorrell, “Hydroxyapatite-coated metals: interfacial reactions during sintering,” J. Mater. Sci.: Mater. Med., vol. 16, pp. 101-106, February 2005.
[2]	M. M. Andin, L. S. Ozyegin, F. N. Oktar, E. Z. Erkmen, O. Anzabi, K. Gross, “Plasma sprayed zirconia-hydroxyapatite composite coatings,” Key Engineering Materials, vol. 309-311, pp. 631-634, January 2006.
[3]	H. Li, K. A. Khor, P. Cheang, “Impact formation and microstructure characterization of thermal sprayed hydroxyapatite/titania composite coatings,” Biomaterials, vol. 24, pp. 949–957, March 2003.
[4]	H. W. Kim, Y. H. Koh, L. H. Li, S. Lee, H. E. Kim, “Hydroxyapatite coating on titanium substrate with titania buffer layer processed by sol-gel method,” Biomaterials, vol. 25, pp. 2533–2538, June 2004.
[5]	C. M. Lin, S. K. Yen, “Characterization and bond strength of electrolytic HA/TiO2 double layers for orthopedic applications,” J. Mater. Sci.: Mater. Med., vol. 15, pp. 1237-1246, November 2004.
[6]	L. Besra, M. Liu, “A review on fundamentals and applications of electrophoretic deposition (EPD),” Progress in Materials Science, vol. 52, pp. 1-61, January 2007.
[7]	P. Sarkar, D. De, H. Rho, “Synthesis and microstructural manipulation of ceramics by electrophoretic deposition,” J. Mater. Sci., vol. 39, pp. 819–823, February 2004.
[8]	A. Khor, H. Li, K. P. Cheang, “Processing-microstructure-property relations in HVOF sprayed calcium phosphate based bioceramic coatings,” Biomaterials, vol. 24, pp. 2233–2243, June 2003.
[9]	M. Wei, A. J. Ruys, M. V. Swain, “Precipitation of hydroxyapatite nanoparticles: Effects of precipitation method on electrophoretic deposition,” J. Mater. Sci.: Mater. Med., vol. 16, pp. 319-324, April 2005.
[10]	J. Ma, C. H. Liang, L. B. Kong, C. Wang, “Colloidal characterization and electrophoretic deposition of hydroxyapatite on titanium substrate,” J. Mater. Sci.: Mater. Med., vol. 14, pp. 797-801, September 2003.
[11]	Z. Wang, P. Xiao, J. Shemilt, “Fabrication of composite coatings using a combination of electrochemical methods and reaction bonding process,” J. European Ceramic Society, vol.20, pp. 1469-1473, September 2000.
[12]	H. Kurzweg, R. B. Heimann, T. Troczynski, M. L. Wayman, “Development of plasma-sprayed bioceramic coatings with bond coats based on titania and zirconia,” Biomaterials, vol. 19, pp. 1507–1511, August 1998.
[13]	L. H. Li, Y. M. Kong, H. W. Kim, Y. W. Kim, H. E. Kim, S. J. Heo, “Improved biological performance of Ti implants due to surface modification by micro-arc oxidation,” Biomaterials, vol. 25, pp. 2867–2875, June 2004.
[14]	X. Nie, A. Leyland, A. Matthews, “Deposition of layered bioceramic hydroxyapatite/TiO2 coatings on titanium alloys using a hybrid technique of micro-arc oxidation and electrophoresis,” Surface and Coatings Technology, vol. 125, pp. 407-414, March 2000.
[15]	L. A. de Sena, M. C. de Andrade, A. M. Rossi, “Hydroxyapatite deposition by electrophoresis on titanium sheets with different surface finishing,” J. Biomedical Materials Research, vol. 60, pp.1-7, April 2002.