Department of Metallurgical and Materials Engineering, Article

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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 ...
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...
Fabrication and cellular interactions of nanoporous tantalum oxide Uslu, Ece; Öztatlı, Hayriye; Garipcan, Bora; Ercan, Batur (Wiley, 2020-10-01) Tantalum possesses remarkable chemical and mechanical properties, and thus it is considered to be one of the next generation implant materials. However, the biological properties of tantalum remain to be improved for its u...
Experimental investigation on the electrocatalytic behavior of Ag-based oxides, Ag2XO4 (X= Cr, Mo, W), for the oxygen reduction reaction in alkaline media Hamat, Burcu Arslan; Aydınol, Mehmet Kadri (Elsevier BV, 2020-10-01) The oxygen reduction (ORR) is one of the most essential electrochemical reactions for the development of promising energy storage and conservation technologies such as metal-air batteries and fuel cells. The slow kinetics ...
Synthesis of alpha-Fe2O3/TiO2 heterogeneous composites by the sol-gel process and their photocatalytic activity Bouziani, Asmae; PARK, JONGEE; Öztürk, Abdullah (Elsevier BV, 2020-09-01) alpha-Fe2O3/TiO2 heterogeneous composites were synthesized by the sol-gel process to increase the photocatalytic activity of TiO2. The structural, morphological, and optical characteristics of the composites were determine...
Preparation and photocatalytic activity of g-C3N4/TiO2 heterojunctions under solar light illumination Gundogmus, Pelin; PARK, JONGEE; Öztürk, Abdullah (Elsevier BV, 2020-09-01) The solar light sensitive g-C3N4/TiO2 heterojunction photocatalysts containing 20, 50, 80, and 90 wt% graphitic carbon nitride (g-C3N4) were prepared by growing Titania (TiO2) nanoparticles on the surfaces of g-C3N4 partic...
Excessive damage increase in dual phase steels under high strain rates and temperatures Cobanoglu, Merve; Ertan, Rasim K.; Şimşir, Caner; Efe, Mert (SAGE Publications, 2020-09-01) Damage formation in dual phase steels is a complex process and it may be sensitive to the deformation conditions and mechanisms. In this study, the damage parameter is measured and compared under quasi-static and industria...
Facile control of hydroxyapatite particle morphology by utilization of calcium carbonate templates at room temperature Oral, Çağatay M.; Çalışkan, Arda; Kapusuz, Derya; Ercan, Batur (Elsevier BV, 2020-09-01) Hydroxyapatite (HAp, Ca-10(PO4)(6)(OH)(2)) particles are widely used in orthopedic applications due to their chemical resemblance to the inorganic component of bone tissue. Since physical and chemical properties of HAp par...

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