Abstract
The aim of the present paper was to investigate the modifications occurred in the Ti-based shape memory alloy subject to electrochemical corrosion in artificial saliva. By 2D and 3D microscopy and by qualitative determinations of the luminous variation we could notice the effects of electrochemical corrosion tests on the surface of the metallic material, and by EDS determinations (Line and Mapping modes) of the surface chemical composition we could determine the chemical modifications produced following the corrosion tests.
Highlights
Wire-bracket systems are commonly used in orthodontic techniques
- Ni and Ti proper to the smart alloy under study; - Na, C and O formed on the alloy surface following the reactions with the electrolyte solution
We identified Na and C, chemical elements that diffused from the electrolyte solution on the surface of the shape memory metal material
Summary
Wire-bracket systems are commonly used in orthodontic techniques. Practitioners can choose from a wide range of wires and brackets made from different alloys: stainless steel, titanium, cobalt- chromium, and niobium. Ni-Ti alloys exhibit the shape memory effect (SME – Shape Memory Effect). The behavior of Ni- Ti alloy was studied for the first time by Buehler and Wiley in the U.S Marine Artillery Lab. The behavior of Ni- Ti alloy was studied for the first time by Buehler and Wiley in the U.S Marine Artillery Lab This equiatomic alloy of Nitinol type has a remarkable SME at temperatures close to those in the environment. Deformed initially at temperatures lower than the room temperature, Ni-Ti alloy wires will return to their initial shape once the temperature increases (Bentahar et al, 2005; Rodriguez and Brown, 1975; Henderson et al, 2011)
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