Nitinol Alloys - Study of Physical and Chemical Application as Biomaterials

Abstract:

The Nitinol is a term which represents the family of nickel and titanium alloys. With the discovery of the extraordinary biocompatibility of these alloys, their implementation has been emphasized in the medical devices and in general dentistry. The characteristics which make these alloys are of interest its superelasticity, shape memory effect and excellent biocompatibility, the latter two characteristics particularly interesting due to the fact that these materials confer the ability to self-expansion or contraction and not presenting rejection the organism. Thus, this study aims to evaluate three NiTi alloys compositions, being one rich in titanium, other poor and the last equiatomic, through tests of physical characterization and surface tension, after different heat treatments. After the results interpretation, it can be seen that the lower percentages by weight of nickel in their products from corrosion was the Nitinol rich in titanium subjected to heat treatment for 24 hours in the oven. Moreover, the same composition present the smallest angle in the test of surface tension.

• Periodical: Materials Science Forum (Volume 805)
• Pages: 3-6
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.805.3
• Online since: September 2014
• Authors: Isabel Portela Rabello*, Carmem Dolores de Sá Catão, Germana Portela Rabello, Marcus Vinícius Lia Fook
• Keywords: Biomaterial, NiTi Alloys, Shape Memory Alloy (SMA)

References

[1] K.J. Phillips Anusavice: Materiais Dentários (11 ed. Rio de Janeiro: Editora Elsevier Brasil, 2005).

[2] R.L. Oréfice, M.M. Pereira and H.S. Mansur: Biomateriais: Fundamentos e Aplicações, (Cultura Médica Rio de Janeiro, 2006).

[3] G.A.S. Soares: Biomateriais: Classificação, Seleção e Avaliação, (COPPE/UFRJ, Rio de Janeiro, 2002).

[4] L. Krone, J. Mentz, M. Bram, H.P. Buchkremer and D. Stover: The potential of powder metallurgy for the fabrication of biomaterials on the basis of Nickel-Titanium: A case study with a staple showing shape memory behaviour. Advanced Engineering Materials 7 ed. 2005, p.613.

DOI: 10.1002/adem.200500029

[5] B.O. Brien, W.M. Carroll and M.J. Kelly: Biomaterials Vol. 23 (2002), p.1739.

[6] G.S. Firstov, H.K. Vitchev, B. Blanpain and J.V. Humbeeck: Biomaterials Vol. 23 (2001), p.4863.

[7] D. Lagoudas, O. Rediniotis and M. Khan: Applications of shape memory alloys to Bioengineering and Biomedical Technology. In: 4th International Workshop on Scattering Theory and Biomedical Applications, Perdika, Greece, pp.195-207, 1999. MEARS D.C.: Metals in medicine and surgery. Intern Metals Rev 218: 119-155, (1997).

DOI: 10.1142/9789812792327_0020

[8] A.R. Pelton, J. Dicello and S. Miyazaki: Min Invas & Allied Technol Vol. 9(1) (2000), p.107.

[9] J. Ryhänen, E. Niemi and W. Serlo: J. BioMed Mater Res. Vol. 35 (1997), p.451.

[10] C.M. Wayman and T.W. Duerig: Na introduction to martensite and shape memory alloy. In: Duerig, T.W.; Melton, K. N.; Stöckel, D.; Wayman, C.M. Engineering aspects of shape memory alloys. Butterworth-Heinemann, 1990 pp.3-20.

DOI: 10.1016/b978-0-7506-1009-4.50005-6