Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Kanca, Muhammed Sait(2)
- Kök, Mediha(2)
- Say, Yakup(2)
- Ali, Leila Ait(1)
- Aslan, Naim(1)
- Ates, Mehmet(1)
- Benhala, B.(1)
- Dağdelen, Fethi(1)
- Dikici, Burak(1)
- Durukan, Ilknur Kars(1)
- Kar, Bulent(1)
- Mansouri, K.(1)
- Mücahit Oflaz(1)
- Niinomi, Mitsuo(1)
- Qader, Ibrahim Nazem(1)
- Qbadou, M.(1)
- Raihani, A.(1)
- Saydam, Sinan(1)
- Sen, Anil(1)
- Yilmaz, Ersen(1)
- Yilmazer, Hakan(1)
Yayınlar
- MakaleYayıncıda açık erişim2024Scopus SJRQ2Selenium 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.
- BildiriYalnız künye2023Investigation of corrosion behavior of ZrN-based PVD coatings on Ti-29Nb-13Ta-4.6Zr alloy in Hank's solution
Ali, Leila Ait; Aslan, Naim; Yilmazer, Hakan; Niinomi, Mitsuo; Sen, Anil; Dikici, Burak; Benhala, B.; Raihani, A.; Mansouri, K.; Qbadou, M.
In this study, the TiNbTaZr (TNTZ) alloys, which do not contain toxic and allergic elements, have been coated with hard ZrN physical vapor deposition (PVD) coatings to increase their in-vitro corrosion resistance. In-vitro electrochemical behavior of the ZrN coating and uncoated TNTZ alloy was evaluated using open circuit potential (OCP) and potentiodynamic polarization (PDS) techniques, respectively. The characterizations of the coatings were carried out using scanning electron microscopy (SEM), energy dispersion spectroscopy (EDS), and X-ray diffraction (XRD). The SEM examinations showed that ZrN coating is homogeneous. Besides, ZrN coating had a higher corrosion resistance than uncoated TNTZ alloy in Hank's solution.
- MakaleAçık Erişim2023Scopus SJRQ2Silver and Copper Coating Effects on Surface Morphology, Crystal Structure and Corrosion Behavior of NiTinol Shape Memory Alloy Plate
Say, Yakup; Kanca, Muhammed Sait; Kök, Mediha
NiTinol alloy has recently been in high demand in biomaterials applications due to its excellent superelasticity and shape memory properties. This demand has increased the studies on improving the negative properties of the NiTinol alloy, even if it is less. In this study, it was aimed to coat the nickel element in the NiTi alloy with biocompatible elements in order to prevent it from secreting its toxic effect after its implantation into the body. In accordance with this purpose, NiTi shape memory alloys were coated with silver and copper element by using thermal evaporation system, and the surface morphology of the alloys after coating was investigated by SEM–EDX (Scanning Electron microscope), and AFM (Atomic force Microscope). After the measurements, it was observed that the coating was successful and homogeneously distributed on the entire surface of the alloy. In addition, an important and positive result was that, the roughness value of the NiTi alloy was decreased with the coating. The change in the crystal structure of the uncoated and coated NiTi alloy was evaluated using an X-ray device, and it was observed that the silver and copper element peaks were formed along with the B2 phase, which is the main phase of the NiTi alloy. In order to examine the effect of coating on the biocompatibility of NiTi alloy, electrochemical test was performed by rapid measurement method in simulated body fluid and corrosion behavior was investigated. According to these experiments, it was concluded that silver plating is more successful in term of biocompatibility than copper coating.
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İncele - Yüksek Lisans TeziAçık Erişim2022Çeşitli derin ötektik sıvılarda elektrokimyasal analiz yöntemi ile katkı kimyasallarının etkisinin çinko ve nikel metalleri için incelenmesi
Mücahit Oflaz
Bu tez çalışmasında derin ötektik sıvı (DES) kullanılarak saf nikel ve çinko kaplamaları üretilmiş olup, üretilen saf kaplamalar katkı kimyasalı ile üretilen nikel ve çinko kaplamalar ile karşılaştırılarak fiziksel ve morfolojik özellikleri üzerine etkisi incelenmiştir. Bu tez çalışmasında temel amaç saf nikel ve çinko kaplamaların fiziksel ve morfolojik özelliklerini kaplama banyolarına eklenen katkı kimyasallarının pozitif etkisi ile iyileştirmektir. Tez çalışmasında kaplama işleminin gerçekleşeceği 50mL'lik beherler içerisinde iki ana DES hazırlanmıştır. Birincisi ikili bileşim komponent karışımı ile oluşturulan, molar olarak 1:4 karışımından meydana gelen ZnCl2:EG ve ikincisi üçlü komponent karışımı ile hazırlanan molar olarak 1:4:0,4 karışımından meydana gelen ChCl:EG:NiCl26H2O DES çözeltisidir. Üretilen DES'lerin içerisine potasyum hidrojen tartarat (PHT), sodyum sitrat tribazik (SCT) ve amonyum klorür (NH4Cl) katkı maddeleri eklenerek toplamda sekiz adet DES üretilmiş olup üretilen DES'lerin iletkenlik ve pH gibi fiziksel özellikleri incelendi. Elektrokimyasal özelliklerinin incelenmesinde dönüşümlü voltametri ve kronoamperometri teknikleri kullanıldı. Her iki teknikte de analizler üç elektrotlu sistem kullanılarak gerçekleştirildi. Fiziksel ve elektrokimyasal özellikleri incelenen DES çözeltilerini kullanılarak yumuşak çelik üzerine çinko ve nikel kaplaması yapıldı. Elde edilen kaplamaların yüzey pürüzlülük ve kalınlık ölçümü, sertlik ölçümü, SEM-EDS analizi ve XRD analizleri yapıldı. Yapılan analizler sonrasında katkı maddeleri eklenerek yapılan kaplamaların katkı kimyasalı içermeyen sistemler sistemler ile karşılaştırması yapılarak incelendi. Yapılan analizler sonucunda elde edilen verilere göre NH₄Cl katkı kimyasalının kaplamanın sertliğini, kalınlığını ve pürüzlülüğü arttırdığı, tane yönlenmelerini ve boyutunu değiştirdiği belirlenmiştir. Sonuç olarak bu tez çalışmasında kullanılan tüm katkı maddelerinin kaplama özellikleri incelenerek kaplama yapısına avantaj ve dezavantaj sağlayan özellikleri verilmiştir
- MakaleAçık Erişim2021Synthesis and Characterization of Silver Nanoparticles and Coating with Chitosan
Ates, Mehmet; Yilmaz, Ersen; Kar, Bulent; Durukan, Ilknur Kars
Recent advancements in nanotechnology have garnered increasing attention due to the improvements in producing and utilizing particles whose sizes are extremely small. There is particular interest in metal nanoparticles due to their distinctive properties. Silver nanoparticles (Ag-NPs) have been of particular interest owing to their unique electrical, optical and physicochemical properties as well as their biomedical applications. Ag-NPs are the fastest growing class of nanoscale materials because of their antibacterial activities. They are now considered to be the next generation antimicrobials. Today, owing to their disinfectant properties, Ag-NPs are extensively used in numerous consumer products, including disinfecting medical devices and home appliances, paints, optical devices, plastics, textiles, soaps and laundry detergents, cosmetics, health-care products, as well as in food packing and food products as preservative and anti-caking agents. Despite their widespread usage, the products containing Ag-NP additives are a serious environmental and human health concern because of their toxicity. Studies on cell and bacterial cultures have shown that Ag-NPs are toxic; and the toxic effects are mainly due to the dissolved Ag ions when Ag-NPs degrade in water. In this study, considering the criteria outlined above, the purpose of the study and Ag-NPs were chemically synthesized in the laboratory environment and modified as chitosan coating. UV-Vis spectroscopy, transmission electron microscopy, scanning electron microscopy, X-ray crystallography and zeta potential analysis were used to characterize the silver nanoparticles.
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