Biocorrosion Behavior of a Dental Shape Memory Alloy
Abstract
Designing shape memory alloys (SMAs) with suitable mechanical properties, playing a predominant role as functional biomaterials and targeted degradation behavior has been a goal in recent time. Biocompatibility within the human body environment is the essential requirement of metals and their alloys used in reconstructive surgery, such as dental implants. In this research, a cooper based SMA was proposed to replace the most common dental bronze, benefit of unique property of pseudo-elasticity. Therefore, alloys that performs well in the air being inert or passive, may suffer a severe corrosion in the body. Bio-corrosion is accelerated by aqueous ions inside the complex biomechanical system displayed by various parts of human body. The microstructure and bio-corrosion behaviors of the SMA alloy in NaCl aqueous solution have been systematically investigated for nine years. The surface morphology of the resulted specimens was investigated using scanning electron microscopy (SEM) equipped with an energy dispersive spectrometry (EDX). Electrochemical tests were conducted using simulated body fluid (SBF) solution.
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[2]. Nady H., Helal N. H., El-Rabiee M. M., Badawy W. A., The role of Ni content on the stability of CueAleNi ternary alloy in neutral chloride solutions, Mater. Chem. Phys., vol. 134, p. 945-950, 2012.
[3]. Sarı U., Aksoy İ., Micro-structural analysis of selfaccommodating martensites in Cu-11.92 wt.% Al-3.78 wt.% Ni shape memory alloy, J. Mater. Process. Technol., vol. 195, no. 1-3, p. 72-76, Jan. 2008.
[4]. Sarı U., Kırındı T., Effects of deformation on microstructure and mechanical properties of a Cu-Al-Ni shape memory alloy, Mater. Charact., vol. 59, no. 7, pp. 920–929, Jul. 2008.
[5]. Wang Z., Liu X., Xie J., Effects of solidification parameters on microstructure and mechanical properties of continuous columnar-grained Cu-Al-Ni alloy, Prog. Nat. Sci. Mater. Int., vol. 21, no. 5, p. 368-374, Oct. 2011.
[6]. Dar R. D., Yan H., Chen Y., Grain boundary engineering of Co-Ni-Al, Cu-Zn-Al, and Cu-Al-Ni shape memory alloys by intergranular precipitation of a ductile solid solution phase, Scr. Mater., vol. 115, p. 113-117, Apr. 2016.
[7]. Saud S. N., Hamzah E., Abubakar T., Bakhsheshi-Rad H. R., Correlation of microstructural and corrosion characteristics of quaternary shape memory alloys CuíAlíNiíX (X=Mn or Ti), Trans. Nonferrous Met. Soc. China, vol. 25, p. 1158-1170, 2015.
[8]. Oli M. Č., Rudolf R., Stamenkovi D., Anžel I., Vučevi D., Jenko M., Lazi V., Lojen G., Relationship between microstructure, cytotoxicity and corrosion properties of a Cu-Al-Ni shape memory alloy, Acta Biomater., vol. 6, p. 308-317, 2009.
[9]. Gurau G., Gurau C., Copper Based Shape Memory Alloy a Modern Opportunity to Change Classic Casting Dental Alloys, TMS2013 Supplemental Proceedings, 25 Feb 2013, USA, p. 999-1006.
[10]. Zhu J.-J., Li S.-H., Shen L.-N., Yang W.-L., Li Z., Corrosion behavior of novel Cu−Ni−Al−Si alloy with super-high strength in 3.5% NaCl solution, Trans. Nonferrous Met. Soc. China, vol. 27, p. 1096-1104, 2017.
[11]. Warthon J. A., Stokes K. R., The influence of nickelaluminium bronze microstructure and crevice solution on the initiation of crevice corrosion, Electrochemica Acta, 53, p. 2463-2473, 2008.
[12]. West J., Basic Corrosion and Oxidation of Metals, Ellis Horwood Ltd., England, 1986.
