Sürdürülebilir Kalkınma Amaçları

• 1

Yazarlar

• Dağdelen, Fethi(1)
• Kanca, Muhammed Sait(1)
• Kök, Mediha(1)
• Qader, Ibrahim Nazem(1)
• Say, Yakup(1)
• Saydam, Sinan(1)
• Uysal, T.(1)

• MakaleYayıncıda açık erişim2024Scopus SJRQ2/r/munzur/2202
  Selenium Inhibitor Coating on NiTi Shape Memory Alloys by Using Thermal Evaporation System

  Kök, Mediha; Kanca, Muhammed Sait; Say, Yakup; Saydam, Sinan; Dağdelen, Fethi; Qader, Ibrahim Nazem

  NiTi-based memory alloys are often used as intracorporeal implant materials because of their superelasticity and shape memory properties. However, over time, the release of nickel from the NiTi alloy into the body becomes unfavorable; therefore, studies should be conducted to reduce the negative impact of nickel leakage. In this study, the biocompatible selenium element was used to coat NiTi alloys with different thicknesses. The coating process was performed using the thermal evaporation technique. Scanning electron microscopy-Energy Dispersive X-ray Analysis measurements revealed that the surfaces of the samples were well covered. Also, the atomic force microscope device determined the surface roughness of the alloys. The roughness of the surface increased after the coating process. The Tafel test was accomplished to determine the biocompatibility of the coated and uncoated alloys in an artificial body fluid. The corrosion test reveals that Se-coated NiTi alloys have high corrosion resistance.

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• MakaleAçık Erişim2023Scopus SJRQ3/r/munzur/2321
  Optimization of shape factor by the response surface method, and the effect on sphalerite flotation recovery

  Uysal, T.

  Various morphological parameters that affect the flotation recovery of sphalerite were modelled and optimized using the response surface method (RSM). The effects of roughness value, shape factor, and collector concentration were investigated using the central composite full design method. The results were evaluated by analysis of variance. The optimum roughening time was found to be 25 minutes, the optimum roughness value was 2.9071 μm, and the optimum collector concentration was 0.001 M. Using these values, a flotation recovery of 98.01% was obtained. Similarly, in shape factor studies, the optimum grinding time was 15 seconds, the optimum roundness value 0.7421, and the optimum collector concentration 0.0009 M, which resulted in a flotation recovery of 94.30%. The average error between the optimization results and the experimental results was estimated to be less than 6%, and the R2 values were greater than 90%. The study shows that RSM can be effectively applied in finding the economic optimum condition for obtaining maximum flotation recovery with minimum reagent consumption.

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  AtıfScopus2·WoS2·OpenAlex2

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