Micro-Structural Characterization and Stress-Corrosion Cracking Behavior of a FGM Glass-Based Coating on Ti6Al4V for Biomedical Applications

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Microstructural and stress-corrosion cracking characterization of two glass-based coatings on Ti6Al4V with different SiO2 content (61% and 64% of SiO2) have been investigated in this work. These coatings belong to the SiO2-CaO-MgO-Na2O-K2O-P2O5 system and were obtained using a simple enamelling technique. They will be used as the first layer of the bioactive FGM coating. Microstructural characterization performed in the coatings by SEM shows the separation of the sintered glass particles after acid etching. The XRD integration method shows that the percentage of the crystalline phase (2.4CaO•0.6Na2O•P2O5) due to the partial devitrification is between 3-16 % vol. Mechanical characterization was made using Vickers and Hertzian indentation. Both coatings were sensitive to Vickers indentation subcritical crack growth with longer crack lengths for the smaller SiO2 content. This coating was also more sensitive to stress-corrosion “ring” cracking by Hertzian indentation. These two results are related with the larger residual stresses due to the thermal expansion mismatch.

Info:

Periodical:

Materials Science Forum (Volumes 492-493)

Edited by:

Omer Van der Biest, Michael Gasik, Jozef Vleugels

Pages:

229-234

Citation:

J. Pavón et al., "Micro-Structural Characterization and Stress-Corrosion Cracking Behavior of a FGM Glass-Based Coating on Ti6Al4V for Biomedical Applications ", Materials Science Forum, Vols. 492-493, pp. 229-234, 2005

Online since:

August 2005

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$38.00

[1] W. Suchanek and M. Yoshimura: J. Mater. Res. Vol. 13 (1998), p.94.

[2] K. Donath: Osseo-Integrated Implants (Ed. G. Heimke. CRC Press, Boca Raton, Florida 1990).

[3] W. Bonfield and Z.B. Luklinska: The Bone-biomaterial Interface (J.E. Davies, U. Of Toronto Press, Toronto 1991).

[4] W.R. Lacefield, E.D. Rigney, L.C. Lucas, J. Ong and J. Gantenberg: Sputter Deposition of CaP Coatings onto Metallic Implants (Ed. P. Vincenzini, Elsevier, N.Y. 1991).

[5] L.L. Hench and O. Anderson: An Introduction to Bioceramics (Eds. LL. Hench and J. Wilson, World Scientific, Singapore 1993), p.239.

[6] J.M. Gómez-Vega, E. Saiz, and A.P. Tomsia: J. Biomed. Mater. Res. Vol. 46 (1999), p.549.

[7] L.L. Hench, R. Splinter,W. Allen and T. Greenlee: J. Biomed. Res. Symp. Vol. 2 (1971), p.117.

[8] B.R. Lawn: Current Opinion in Solid State and Materials Science Vol. 6 (2002), p.229.

[9] G. Klug and M. Alexander: Quatitative X-ray diffractometry (Eds. Zevin, L.S. and Kimmel, G., Springer-Verlag, N.Y., 1995).

[10] B.D. Cullity: Elements of X-ray diffraction (2nd Ed., Adison-Wesley, N.Y. 1978).

[11] P.S. Turner: J. Res. NBS Vol. 37 (1946), p.239.

[12] S. Lopez-Esteban, E. Saiz, S. Fujino, T. Oku, K. Suganuma and A.P. Tomsia: J. Eur. Ceram. Soc. Vol. 23 (2003), p.2921.

[13] P.D. Warren: J. Eur. Ceram. Soc. Vol. 15 (1995), p.201.

[14] W. Freiman: Strength of Inorganic Glass (C.R. Kurkjian, Ed., Plenum Press, 1985), p.197.

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