TR Dizin İndeksli Yayınlar / TR Dizin Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7149
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Article Citation - WoS: 1Citation - Scopus: 2Reactive Wetting of Metallic/Ceramic (al/Α-al2 O3 ) Systems: a Parallel Molecular Dynamics Simulation Study(TÜBİTAK - Türkiye Bilimsel ve Teknolojik Araştırma Kurumu, 2020) Aral, GürcanThe reactive wetting process of a flat solid alumina (?-Al2 O3) ceramic surface by metallic aluminum (Al) nanodroplets with different shapes (spherical, cylindrical, and layer) is studied using parallel molecular dynamics (MD) simulations based on a variable charge MD method, with focuses on heat transfer, mass transfer, and the structure of the reactive region at the Al/?-Al2 O3 interface. We find that the diffusion of oxygen (O) atoms from the substrate into the droplet leads to the formation of a continuous layer of reaction product at the interface. The diffusion length of oxygen atoms into the spherical Al droplet is found to be ~7.3 Å, and the number density of O atoms at the ~5 top layers of the substrate decreases substantially. As a result, the structural correlations near the reactive region differ considerably from those in the solid substrate. Heat generated by the exothermic reactions in the reactive region is transferred to both the substrate and the droplet. The heat transfer is found to be sensitive to droplet shape.Article Citation - WoS: 16Citation - Scopus: 19Application of Experimental Design on Determination of Aluminum Content in Saline Samples by Adsorptive Cathodic Stripping Voltammetry(TUBITAK, 2013) Yılmaz, Sinan; Öztürk, Betül; Özdemir, Durmuş; Eroğlu, Ahmet Emin; Ertaş, Fatma NilAdsorptive cathodic stripping voltammetric determination of aluminum at ng mL-1 levels in salt samples based on the metal complexation with Calcon (1-(2-hydroxynaphthylazo)-2 naphthol-4-sulfonic acid) and the subsequent adsorptive deposition onto a hanging mercury drop electrode was studied. Central composite design was used as a design method. Several chemical and instrumental parameters (pH, ligand concentration, deposition time, deposition potential, and complexing time) were involved in the experimental design. Analytical parameters such as repeatability, linearity, and accuracy were also investigated and the detection limit was found as 0.32 ng mL-1.Article Kapalı Hücreli Alüminyum Köpük Metallerin Üretim Metodları ve Mekanik Özellikleri(TMMOB Metalurji ve Malzeme Mühendisleri Odası, 1999) Elbir, Semih; Yılmaz, Selahattin; Güden, MustafaKapali hücreli alüminyum köpük metallerin üretim metodları, mikroyapisi, mekanik özellikleri ve uygulama alanları özetlenmiştir. Bu malzemelerin en önemli mekanik özelliklerinden birisi basma altında yüksek miktarda enerji emme kapasiteleridir. Fraunhofer Research Center tarafından toz metalurjisi ile üretilen değişik yoğunluktaki alüminyum köpük metallerine basma testleri yapılmıştır. Basma gerilmesi yoğunluğun artmasıyla yükselmiştir. Fakat enerji emme kapasiteleri yoğunluğun artması ile azalmıştır. Köpük metal hücre duvarlarının oksit tabakası ile kaplı olduğu gözlenmiştir.