Development and Characterization of Ni55Ti45 Shape Memory Alloy for Biomedical Applications: Development and Characterization of Ni55Ti45 Shape Memory Alloy for Biomedical Applications

Aqsa  Amir; Shabbar  Atiq; Waheed  Ahmad; Ayisha  Saleem; Hafiza  Haseebah

Authors

Aqsa Amir Institute of Advanced Materials, Bahauddin Zakariya University, Multan-60800, Pakistan
Shabbar Atiq Institute of Advanced Materials, Bahauddin Zakariya University, Multan-60800, Pakistan
Waheed Ahmad Institute of Advanced Materials, Bahauddin Zakariya University, Multan-60800, Pakistan
Ayisha Saleem Institute of Advanced Materials, Bahauddin Zakariya University, Multan-60800, Pakistan
Hafiza Haseebah Institute of Advanced Materials, Bahauddin Zakariya University, Multan-60800, Pakistan

Keywords:

Biomaterials, shape memory, nickel-titanium, X-ray diffraction, scanning electron Mmicroscope

Abstract

In this study, a shape memory alloy of Ni55Ti45 was developed by Vacuum Arc melting technique under a vacuum of 10-5mbar. It was followed by homogenization in Nabertherm Tube furnace at a temperature of 1000°C for 54 hrs and subsequent furnace cooling. A series of tests had been performed in the laboratory in order to characterize the behavior of this alloy. Scanning electron microscopy results confirmed the presence of primary NiTi and secondary Ni3Ti phases respectively. X ray diffraction confirmed the BCC (body centered cubic) and HCP (hexagonal close packed) structures of NiTi and Ni3Ti respectively. In differential scanning calorimetry, no transformation was observed in the temperature range of 0ᵒC-1200ᵒC. This is indicative of the fact that the transformation temperature for shape memory effect lies below this temperature range.

References

Machado, L.G. & M.A. Savi. Medical applications of shape memory alloys. Brazilian Journal of Medical and Biological Research 36: 683-691 (2003).

Lekston, Z. & E. giewka. X-ray diffraction studies of NiTi shape memory alloys. Archives of Materials Science and Engineering 28: 665-672 (2007).

Thompson, S.A. An overview of nickel–titanium alloys used in dentistry. International Endodontic Journal 33: 297–310 (2000).

Xuanyong Liua, Paul K. Chub, & Chuanxian Dinga. Surface modification of titanium, titanium alloys, and related materials for biomedical applications. Materials Science and Engineering 47: 49–121 (2004).

Miyazaki, S., Kima, & H.Y., Hosoda. Development and characterization of Ni-free Tibase shape memory and superelastic alloys. Materials Science and Engineering A 438–440: 18–24 (2006).

Verdian, M. M, Raeissi, K. Salehi, & S. Sabooni. Characterization and corrosion behavior of NiTi- Ti2Ni-Ni3Ti multiphase intermetallics produced by vacuum sintering. Vacuum 86 : 91-95 (2011).

Povoden, E., D. Karadeniz, C. Cirstea, P. Lang, T. Wojcik, & E. Kozeschnik. Thermodynamics of Ti- Ni shape memory alloys. CALHAD: Computer Coupling of Phase Diagrams 41: 128-139 (2013).

Gil, F.J., M. Cenizo, E. Espina, A. Rodrigu, E. Rúperez, & J.M. Manero. NiTi super elastic orthodontic wires with variable stress obtained by aging treatments. Materials Letters 104: 5-7 (2013).

Development and Characterization of Ni55Ti45 Shape Memory Alloy for Biomedical Applications