Mühendislik Fakültesi: Recent submissions

Now showing items 401-420 of 2863

Preparation and Characterization of Copper Powders with Sn Coating by the Electroless Plating

Uysal, Mehmet; Çetinkaya, Tuğrul; H. Gul; Kartal, Muhammet; Algül, Hasan; Tokur, Mahmud; Alp, Ahmet; Akbulut, Hatem (POLISH ACAD SCIENCES INST PHYSICS, 2015)

In this work, Sn-Cu composite powders were produced using an electroless process. The tin content on the surface of copper powders was vaned by using different concentrations of SnSO4 in the plating bath. The surface ...
Structural Characterization of Boro-Titanized AISI 1040 Steel

O. Kon; S. Pazarlioglu; Durmaz, Mustafa; Şen, Uğur; Şen, Şaduman (POLISH ACAD SCIENCES INST PHYSICS, 2015)

In this study, boro-titanizing treatment was applied to AISI 1040 steel. In the coating treatment, steel samples were pre-boronized in a slurry salt bath consisting of borax, boric acid and ferro-silicon at 900 degrees C ...
Nanostructured ATO Anodes Produced by RF Magnetron Sputtering for Li-Ion Batteries

Cevher, Özgür; Toçoğlu, Ubeyd; Akbulut, Hatem (POLISH ACAD SCIENCES INST PHYSICS, 2015)

In this study, the reversible capacities, as well as the cycling behavior, of crystalline antimony-doped tin oxide (ATO) films have been investigated. ATO films were deposited on Cr-coated stainless steel substrates by the ...
The Cordierite Formation in Mechanically Activated Talc-Kaoline-Alumina-Basalt-Quartz Ceramic System

Kırsever, Derya; N. Karakus; Canikoğlu, Nuray; Toplan, Nil; H. O. Toplan (POLISH ACAD SCIENCES INST PHYSICS, 2015)

The powder mixtures of Talc-Kaolinite-Alumina-Basalt-Quartz were mechanically activated in a planetary ball mill for 1 hour. The structural alterations and thermal behaviour of the powder mixture were examined by X-ray ...
Recycling of Secondary Aluminium Production Waste in Processing of Mullite Based Refractory Ceramics

Kırsever, Derya; N. K. Karabulut; Toplan, Nil; H. O. Toplan (POLISH ACAD SCIENCES INST PHYSICS, 2015)

This work describes the studies to reuse secondary aluminium production waste (SAPW) derived from aluminium casting processes in the fabrication of mullite-based refractory ceramics. SAPW was characterized by using particle ...
High capacity Graphene/alpha-MnO2 nanocomposite cathodes for Li-O-2 batteries

Çetinkaya, Tuğrul; Akbulut, Hatem; Tokur, Mahmud; Seyma Ozcan; Uysal, Mehmet (PERGAMON-ELSEVIER SCIENCE LTD, 2016)

Graphene/alpha-MnO2 nanocomposite cathodes containing various amount of alpha-MnO2 catalysts (10 wt.%, 30 wt.%, 50 wt.%) were produced using planetary ball milling. The charge-discharge characteristics of the Li-O-2 cells ...
Morphological Differences and Their Effects on the Mechanical Properties of Titanium Oxides Thin Film Obtained via Anodization Process

N. Sarica; Z. Z. Ozturk; Bindal, Cuma; A. H. Ucisik (POLISH ACAD SCIENCES INST PHYSICS, 2016)

It is well known that anodization process is helpful for obtaining metallic oxides on the metal surfaces. The advantages of this process are used in this study to obtain rough surfaces consisting of titanium oxides and ...
Raman Studies of ZnO Products Synthesized by Solution Based Methods

Gültekin, Deniz; Akbulut, Hatem (POLISH ACAD SCIENCES INST PHYSICS, 2016)

In this study, nanostructured ZnO thin film coatings produced by sol-gel method have been examined and characterized. ZnO thin film coatings synthesized by the preparation of ZnO sols in the liquid phase from homogeneous ...
Study of the Nickel-Tungsten and Nickel-Cobalt Coatings Plated on Ductile Iron

Ayday, Aysun; H. Skulev (POLISH ACAD SCIENCES INST PHYSICS, 2016)

Hard coatings such as nickel, chromium and tungsten can improve the surface properties of the substrate. The coating surfaces have been developed for increase of the wear resistance, hardness or corrosion resistance for ...
Closing to Scaling-Up High Reversible Si/rGO Nanocomposite Anodes for Lithium Ion Batteries

Tokur, Mahmud; Algül, Hasan; Özcan, Serdar; Çetinkaya, Tuğrul; Uysal, Mehmet; Akbulut, Hatem (PERGAMON-ELSEVIER SCIENCE LTD, 2016)

In spite of its excellent discharge capacity, low conductivity and poor cycling stability prevent to commercialize silicon negative electrodes for the Lithium ion batteries (LIBs). Since graphene has large surface area, ...
Antimicrobial peptide families expressed by human tissues

Şen, Murat; Şen, Şaduman; S. Celik; Altındiş, Mustafa (WILEY-BLACKWELL, 2016)
EFFECT OF MECHANICAL ACTIVATION ON THE SYNTHESIS OF A MAGNESIUM ALUMINATE SPINEL

Kırsever, Derya; Canikoğlu, Nuray; Toplan, Hüseyin Özkan (INST ZA KOVINSKE MATERIALE I IN TEHNOLOGIE, 2016)

A magnesium aluminate spinel powder (72 % Al2O3 & 28 % MgO) was prepared with mechanical activation. Samples were sintered in a temperature range of 1400-1750 degrees C. The final sintered products were characterized with ...
Sintering and aging behaviours of Al4CuXMg PM alloy

Gökçe, Azim; Fındık, Fehim; Kurt, Ali Osman (TAYLOR & FRANCIS LTD, 2016)

Sintering and aging behaviours of Al-Cu-Mg powder metallurgy (PM) alloy produced from elemental powders were examined. After evaluating results from thermal analysis, tests were carried out on Al-4Cu alloys with magnesium ...
EFFECT OF ACID CONCENTRATION ON THE EXTRACTION OF NICKEL FROM LATERITE

Tunç Parlak, Tuğba; Yıldız, Kenan (TANGER LTD, 2016)

Nickel is essential metal due to usage area as stainless steel, non-ferrous alloy production, electroplating and chemical industry. Degradation of nickel sulphides leads to extraction of nickel from laterites. High cost ...
Electrochemical Characterization of Al3+ Doped Spinel Cathode Active Nanoparticles for Li-Ion Batteries

Bulut, Emrah; Akbulut, Hatem (POLISH ACAD SCIENCES INST PHYSICS, 2016)

Al3+ doped spinel structured cathode active nanoparticles were produced by microwave hydrothermal synthesis. Structural characterization of as synthesized nanoparticles was performed by X-Ray Diffraction (XRD) Spectroscopy ...
ELECTROMAGNETIC-SHIELDING EFFECTIVENESS AND FRACTURE BEHAVIOR OF LAMINATED (Ni-NiAl3) COMPOSITES

Yener, Tuba; Yener, Tuba; Yener, Şuayb Çağrı; Yener, Şuayb Çağrı; Zeytin, Sakin (INST ZA KOVINSKE MATERIALE I IN TEHNOLOGIE, 2016)

In this research Ni-NiAl3 multilayer composites were produced through reactive sintering in an open atmosphere using Ni and Al foils with a 250-mu m initial thickness. The sintering was performed at 700 degrees C under 2 ...
INFLUENCE OF Na 2SiF6 ON THE SURFACE MORPHOLOGY AND CORROSION RESISTANCE OF AN AM60 MAGNESIUM ALLOY COATED BY MICRO ARC OXIDATION

Ayday, Aysun (INST ZA KOVINSKE MATERIALE I IN TEHNOLOGIE, 2016)

Oxide coatings were formed by micro arc oxidation (MAO) on an AM60 magnesium alloy substrate. The effects of Na2SiF6 in an electrolytic solution on the micro arc oxidation process and the structure and mechanical properties ...
Electrochemical characterization of silicon/graphene/MWCNT hybrid lithium-ion battery anodes produced via RF magnetron sputtering

Toçoğlu, Ubeyd; Hatipoğlu, Gizem; Alaf, M; Kayış, Fuat; Akbulut, Hatem (ELSEVIER SCIENCE BV, 2016)

In this study it was aimed to enhance cycling performance of silicon lithium ion battery anodes via producing flexible Silicon/Graphene/MWCNT composite structures. The volumetric expansions, which are the primary obstacle ...
EFFECT OF ALTERNATIVE HEAT-TREATMENT PARAMETERS ON THE AGING BEHAVIOR OF SHORT-FIBER-REINFORCED 2124 Al COMPOSITES

Yahya Altunpak; Aslan, Serdar; Güler, Mehmet Oğuz; Akbulut, Hatem (INST ZA KOVINSKE MATERIALE I IN TEHNOLOGIE, 2016)

The 2124 Al alloy and a composite of the 2124 Al alloy reinforced with 20 % of volume fractions of delta-Al2O3 short fibers made by squeeze casting were subjected to controlled and systematic aging treatments. The materials ...
Advanced Structured Materials

F. E. Bastan; O. Karaarslan; Erdoğan, Garip; Üstel, Fatih; A Ochsner; H Altenbach (SPRINGER-VERLAG SINGAPORE PTE LTD, 2016)

Hydroxyapatite (HA) is one of the most significant calcium phosphate bio-ceramic which is used commercially in biomedical application due to its similar structure with natural bone, bioactivity, and stability in body fluid. ...