TR Dizin İndeksli Yayınlar / TR Dizin Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7149

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1999 - 199912010 - 20201

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Department: search.filters.department.İzmir Institute of Technology. Mechanical EngineeringInstitution Author: search.filters.institutionAuthor.Yılmaz, Selahattin

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  • Article
    Citation - WoS: 11
    Citation - Scopus: 13
    Effect of Cnt Incorporation on Pan/Ppy Nanofibers Synthesized by Electrospinning Method
    (TÜBİTAK, 2020) İnce Yardımcı, Atike; Tanoğlu, Metin; Yılmaz, Selahattin; Selamet, Yusuf
    In this study, carbon nanotubes (CNTs) added polyacrylonitrile/polypyrrole (PAN/PPy) electrospun nanofibers were produced. Average diameters of the nanofibers were measured as 268 and 153 nm for 10 and 25 wt% of PPy contents, respectively. A relatively higher strain to failure values (23.3%) were observed for the low PPy content. When as-grown CNTs (1 and 4 wt%) were added into the PAN/PPy blends, disordered nanofibers were observed to form within the microstructure. To improve the interfacial properties of CNTs/PAN/PPy composites, CNTs were functionalized with H2SO4/HNO3/HCl solution. The functionalized CNTs were well dispersed within the nanofibers and aligned along the direction of nanofibers. Therefore, beads formation on nanofibers decreased. The impedance of the nanofibers was found to decrease with the PPy content and CNT addition. These nanofibers had a great potential to be used as an electrochemical actuator or a tissue engineering scaffold.
  • Article
    Kapalı Hücreli Alüminyum Köpük Metallerin Üretim Metodları ve Mekanik Özellikleri
    (TMMOB Metalurji ve Malzeme Mühendisleri Odası, 1999) Elbir, Semih; Yılmaz, Selahattin; Güden, Mustafa
    Kapali 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.