Akademik Veri Yönetim Sistemi
Tezin Türü: Yüksek Lisans
Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Metalurji ve Malzeme Mühendisliği Bölümü, Türkiye
Tezin Onay Tarihi: 2014
Tezin Dili: İngilizce
Öğrenci: Aylin Güneş
Danışman: ARCAN FEHMİ DERİCİOĞLU
Özet:The aim of this study was to develop processing pathways to fabricate glass flake reinforced bio-inspired composites with microstructural architecture similar to that of nacre using two processing routes based on hot-pressing and magnetic field assistance. Glass flakes with different aspect ratios were used as inorganic reinforcement in two different thermoplastic matrices, polystyrene (PS) and acrylonitrile butadiene styrene (ABS). Correlation between inorganic content, microstructural architecture and mechanical property enhancement of the composites fabricated by various process combinations was examined. To investigate the effect of inorganic-organic phase interfacial interaction and adhesion on the mechanical properties of the fabricated composites, glass flakes surfaces were treated with an organofunctional silane called aminopropyltriethoxy silane. X-Ray Photoelectron Spectroscopy (XPS) was used to analyze the adsorption of silane molecules on the inorganic reinforcement surfaces. Mechanical properties of the fabricated composites were examined using three point bending, micro hardness and work of fracture tests. Results indicated that hot-pressing and magnetic field assistance based methods are easy and effective pathways to fabricate nacre-like bulk inorganic-organic composites with brick and mortar microstructural architecture. Composites fabricated by these two different pathways reinforced by glass flakes exhibited improved mechanical characteristics such as higher flexural strength, stiffness and hardness. Treatment of the glass flake surfaces by silane further enhanced the mechanical properties of the fabricated composites, where it provided simultaneous improvement in both strength and fracture resistance of the composites, which is the main challenging task to be achieved in the field of materials science from a structural point of view.