Department of Metallurgical and Materials Engineering, Article

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Conducting fluorine doped tin dioxide (FTO) coatings by ultrasonic spray pyrolysis for heating applications Süer, Başar; Özenbaş, Ahmet Macit (2021-06-01) Fluorine doped tin dioxide (FTO) coatings were deposited on AISI 304 stainless steel (SS) substrates using ultrasonic spray pyrolysis (USP) technique. Four different candidate insulating intermediate layers of TiO2, MgO, A...
Microwave-assisted decoration of cotton fabrics with Nickel-Cobalt sulfide as a wearable glucose sensing platform Hekmat, Farzaneh; Ezzati, Milad; Shahrokhian, Saeed; Ünalan, Hüsnü Emrah (2021-06-01) © 2021 Elsevier B.V.Flexibility and human-body compatibility have been emerged through the use of commercial fabrics (CFs) in designing wearable non-enzymatic glucose sensing platforms. In this work, electrodes fabricated ...
An Empirical Approach to Analyze Creep Rupture Behavior of P91 Steel Aslam, Muhammad Junaid; Gür, Cemil Hakan (2021-05-01) © 2021 Materials Research Society of Korea. All Rights Reserved.P91 steel has been a highly researched material because of its applicability for high-temperature applications. Considerable efforts have been made to produce...
Seamless Monolithic Design for Foam Based, Flexible, Parallel Plate Capacitive Sensors Çiçek, Melih Ögeday; Doğanay, Doğa; Durukan, Mete Batuhan; Gorur, Mustafa Caner; Ünalan, Hüsnü Emrah (2021-04-01) Capacitive pressure sensors received significant attention in line with advancements in wearable electronics. However, in the era of the wearable electronics, fabricated sensors fail to fulfill the absolute requirements. S...
Microstructure, phase relationships and microhardness of Fe60Al40-nHfn alloys (n=1, 3, and 5 at.%) Yildirim, Mehmet; Cetinbakis, Nese; Culu, Ayse; Akdeniz, Mahmut Vedat; Mehrabov, Amdulla (2021-04-01) The microstructural evolution, solidification behavior, phase relationships, microhardness and room temperature magnetic properties of the hypoeutectic Fe60Al40-nHfn (n = 1, 3, and 5 at.%) compositions are investigated in ...
Advances in protective layer-coating on metal nanowires with enhanced stability and their applications Bang, Junhyuk; Coşkun, Şahin; Pyun, Kyung Rok; Doğanay, Doğa; Tunca, Sensu; Koylan, Serkan; Kim, Dongkwan; Ünalan, Hüsnü Emrah; Ko, Seung Hwan (Elsevier BV, 2021-03-01) © 2020 Elsevier LtdThe demand for flexibility in transparent conductive electrodes(TCEs) is increasing due to the functionality demand and convenience of deformable electrodes. The high-cost and brittleness of the conventi...
Nonalloyed Ohmic Contacts in AlGaN/GaN HEMTs With MOCVD Regrowth of InGaN for Ka-Band Applications Cakmak, Huseyin; Ozturk, Mustafa; Ozbay, Ekmel; İmer, Muhsine Bilge (2021-03-01) Low-resistance ohmic contacts in AlGaN/GaN high-electron-mobility transistor (HEMT) devices require high-temperature (HT) annealing (>800 C) which can deteriorate material quality, surface morphology, and edge acuity of th...
Tensile properties and microstructure of additively manufactured Grade 91 steel for nuclear applications Eftink, Benjamin P.; Vega, Daniel A.; El Atwani, Osman; Sprouster, David J.; Yoo, Yung Suk J.; Steckley, Todd E.; Aydoğan Güngör, Eda; Cady, Carl M.; Al-Sheikhly, Mohamad; Lienert, Thomas J.; Maloy, Stuart A. (Elsevier BV, 2021-02-01) © 2020 Elsevier B.V.Laser powder bed additively manufactured Grade 91 composition steel was investigated in comparison to wrought Grade 91 steel in terms of microstructure and mechanical properties. As-deposited additively...
Effect of calcium or yttrium doping on cation ordering and electrochemical performance of Li(Ni0.80-xCo0.15Al0.05Mx)O-2 (M = Ca, Y) as a Li-ion battery cathode Uygur, Cansu Savas; Aydınol, Mehmet Kadri (Elsevier BV, 2021-02-01) The electrochemical performance of Li(Ni-0.80-xCo(0.15)Al(0.05)M(x))O-2 (NCA) cathode was demonstrated to be improved by calcium and yttrium doping. Samples were synthesized by ultrasonic sound-assisted co-precipitation me...
Enhanced methylene blue removal efficiency of TiO2 embedded porous glass Ertus, E. Burak; Vakifahmetoglu, Cekdar; Öztürk, Abdullah (Elsevier BV, 2021-02-01) A porous glass (PG) embedded with titanium dioxide (TiO2) was produced via impregnation of the PG with Titanium (IV) Isopropoxide solution followed by crystallization. N-2 sorption analyses revealed that the specific surfa...
Osteogenic Properties of 3D-Printed Silica-Carbon-Calcite Composite Scaffolds: Novel Approach for Personalized Bone Tissue Regeneration Memarian, Parastoo; Sartor, Francesco; Bernardo, Enrico; Elsayed, Hamada; Ercan, Batur; Delogu, Lucia Gemma; Zavan, Barbara; Isola, Maurizio (2021-01-01) Carbon enriched bioceramic (C-Bio) scaffolds have recently shown exceptional results in terms of their biological and mechanical properties. The present study aims at assessing the ability of the C-Bio scaffolds to affect ...
In Situ Micro-Pillar Compression to Examine Radiation-Induced Hardening Mechanisms of FeCrAl Alloys Cui, Yuchi; Aydoğan Güngör, Eda; Gigax, Jonathan G.; Wang, Yongqiang; Misra, Amit; Maloy, Stuart A.; Li, Nan (Elsevier BV, 2021-01-01) © 2020The effects of 5 MeV Fe2+ ion irradiation at 300°C on the microstructure evolution and deformation behavior of a FeCrAl C26M alloy are presented. It has been found that dislocation loop density increases an order of ...
Effect of isothermal transformation treatment and tempering on the microstructure and hardness of a medium c and high si steels KAFADAR, Gülten; Kalkanlı, Ali; ÖZDEMİR, ABBAS TAMER; Ögel, Bilgehan (2021-01-01) © 2021 Iron and Steel Institute of Japan. All rights reserved.This research work aims to study the effect of 2wt%Mo on bainitic transformation kinetics and bainite morphology in 0.6wt%C-1.2wt%Si-1.0wt%Mn-0.2wt%Cr steel. Sp...
A Point-of-Use (POU) Water Disinfection: Silver Nanowire Decorated Glass Fiber Filters Bahcelioglu, Ecem; Doğanay, Doğa; Coskun, Sahin; Ünalan, Hüsnü Emrah; Bayramoğlu, Tuba Hande (2020-12-01) Investigation of a new, low-cost, safe and highly efficient water disinfection alternative to conventional methods has prime importance. This study aims to develop silver nanowire decorated glass fiber (AgNW-GF) filters fo...
Nitrogen effects on radiation response in 12Cr ferritic/martensitic alloys Aydogan, E.; Gigax, J. G.; Parker, S. S.; Eftink, B. P.; Chancey, M.; Poplawsky, J.; Maloy, S. A. (Elsevier BV, 2020-12-01) Ferritic/martensitic steels are one of the best candidates for structural materials for high dose applications in next generation nuclear reactors. The composition of structural materials must be optimized for reliable ser...
In-situ observation of nano-oxide and defect evolution in 14YWT alloys Aydoğan Güngör, Eda; El-Atwani, O.; Li, M.; Maloy, S.A. (Elsevier BV, 2020-12-01) © 2020 Elsevier Inc.Nanostructured ferritic alloys (NFAs) are considered as candidates for structural components in advanced nuclear reactors due to their excellent radiation resistance as a result of a high density of nan...
Effect of Welding Parameters on the Liquation Cracking Behavior of High-Chromium Ni-Based Superalloy Mashhuriazar, Amirhossein; Omidvar, Hamid; Gür, Cemil Hakan; Sajuri, Zainuddin (2020-11-01) Gas turbine blades working under extremely harsh operating conditions are made of superalloys. These superalloys are exposed to various damage mechanisms, which wear them out gradually. Welding is often preferred to repair...
Development of electrically conductive porous silk fibroin/CNF scaffolds. Tufan, Yiğithan; Öztatlı, H; Garipcan, B; Ercan, B (IOP Publishing, 2020-10-22) Tissue engineering applications typically require 3D scaffolds which provide requisite surface area for cellular functions, while allowing nutrient, waste and oxygen transportation with the surrounding tissues. Concurrentl...
Microstructural and texture evolution during thermo-hydrogen processing of Ti6Al4V alloys produced by electron beam melting Dogu, Merve Nur; ESEN, ZİYA; Davut, Kemal; Tan, Evren; Gumus, Berkay; Dericioğlu, Arcan Fehmi (Elsevier BV, 2020-10-01) The present study was conducted to reveal the effects of building angles and post heat-treatments (2-step Thermo-Hydrogen Processing (THP) and conventional annealing treatment) on the density, microstructure and texture of...
Facile preparation of nanoparticle based SERS substrates for trace molecule detection Demirta, Ozge; Doğanay, Doğa; Öztürk, İbrahim Murat; Ünalan, Hüsnü Emrah; Bek, Alpan (Royal Society of Chemistry (RSC), 2020-10-01) In this work, we demonstrate that a polished Si wafer surface can be converted to possess strong surface-enhanced Raman scattering (SERS) activity by spray coating of polyol synthesized colloidal silver nanoparticles (AgNP...

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