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Fabrication and characterization of Zinc-xTitanium alloys by SPS for biodegradable implants: A comparative study on corrosion resistance and biological behavior

Salahi, A. H ; Sharif University of Technology | 2024

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matchemphys.2024.129696
  3. Publisher: 2024
  4. Abstract:
  5. This study investigated the fabrication and characterization of two new zinc-titanium-based alloys. The Zn-xTi alloys (x = 4 and 10 wt%) were mechanically alloyed by powder metallurgy for 10 h. The spark plasma sintering (SPS) method shaped the resulting powder. The fabricated samples were evaluated in terms of morphology and structure by XRD, SEM, and microhardness tests. The obtained parts’ corrosion resistance and biological behavior were also examined by potentiodynamic polarization analysis, electrochemical impedance spectroscopy (EIS), and MTT tests. The results showed that alloying increased the hardness compared to pure zinc samples. The corrosion test results indicated higher corrosion resistance of Zn–4Ti alloy than Zn–10Ti alloy. The cell toxicity test, performed indirectly by the extraction process, clearly showed lower toxicity of Zn–4Ti alloy compared to the other alloy. In the extractions with low concentrations (25 % and 12.5 %), no cell toxicity was observed in the Zn–4Ti alloy. This research concludes that the alloy containing 4 wt% titanium can be a suitable candidate for making biodegradable implants. © 2024 Elsevier B.V
  6. Keywords:
  7. Zinc-titanium ; Binary alloys ; Corrosion resistance ; Corrosion resistant alloys ; Electrochemical corrosion ; Electrochemical impedance spectroscopy ; Fabrication ; Powder metallurgy ; Spark plasma sintering ; Titanium alloys ; Zinc alloys ; Biodegradable implants ; Biological behavior ; Cell toxicity ; Comparatives studies ; Fabrication and characterizations ; Resistance behaviors ; Titania ; Titanium-based alloys ; Zinc-titania ; Mechanical alloying
  8. Source: Materials Chemistry and Physics ; Volume 324 , 2024 ; 02540584 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0254058424008216