Abstract
NiTi alloys are widely used in biomedical applications for their unique properties particularly the shape memory effect, superelasticity, and biocompatibility. In this research, NiTi/PVA composite nanofibers are fabricated by electrospinning technique, using a novel method of producing NiTi ultrafine particles by immersing amorphous NiTi alloy in dilute aqua regia solution. The NiTi particles are successfully embedded in the PVA matrix. The produced NiTi particles are analyzed by X-ray diffraction (XRD), Energy dispersive spectroscopy (EDS), and Particle size analyzer. The XRD pattern of ultrafine NiTi particles shows much better phases as compared to the XRD pattern of the amorphous NiTi alloy sample. The morphology of the produced NiTi/PVA composite nanofibers are characterized by Field emission scanning microscope (FESEM), and Energy dispersive spectrometry (EDS). The test results show regular continuous smooth bead-free nanofibers.
Highlights
In recent years, more attention has been focused on the fabrication of nanomaterials [1]
The sintered NiTi alloy sample has been examined under an Optical microscope after grinding, polishing, and etching
The X-ray diffraction (XRD) patterns of sintered NiTi alloy and the produced NiTi particles are shown in Figures 2 and 3, respectively
Summary
More attention has been focused on the fabrication of nanomaterials [1]. Nickel-Titanium alloys are mostly used in biomedical industries due to their good biocompatibility, osseointegration, and corrosion resistance in addition to the unique characteristics: superelasticity and shape memory effect. These biomedical industries include orthopedic implants, orthodontic devices, and cardio stents. The material can be deformed by 6-8% without breaking its atomic bonds, this phenomenon known as twinning [4]. These effects occur within a certain temperature range and are highly dependent on the Ni-Ti ratio within a near equiatomic range [5]. Other production methods include ultrasonic electrolysis [7], mechanically assisted synthesis (metal powders in a planetary ball mill) [8], electro-explosion of a NiTi wire with spark-plasma sintering [9], gas-flash evaporation [10], thin-film deposition in combination with nanosphere lithography [11], electric-discharge plasma in liquid [12], and biosynthesis (bio-reduction) [13]
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