Browsing Makale Koleksiyonu by Issue Date
Now showing items 1-20 of 36
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Kaynaklı birleştirmeli konstrüksiyonların çarpılma eğilimlerinin belirlenmesi için deneysel bir yaklaşım
(2008)Bu çalışmada, kaynaklı birleştirmeli konstrüksiyonların imalat sürecinde ve sonrasında oluşan çarpılma eğilimlerinin, çarpılma kuvvetleri vasıtasıyla belirlenmesi amaçlanmıştır. Bu amaçla, rijit bir kafes hücre sistemi ve ... -
Alüminyumun iletken polimer ile kaplanması ve kaplama mikroyapısına korozyonun etkisinin incelenmesi
(Gazi Üniversitesi Mühendislik - Mimarlık Fakültesi, 2010)Bu çalışmada, alüminyumun iletken polimer bir malzeme olan polianilin ile elektrokimyasal yöntemle kaplanması, kaplanan yüzeyin korozyon öncesi ve sonrası mikroyapısı incelenmiştir. Polianilin kaplama işlemi, okzalik asit ... -
Effect of electrolytic nickel coating on fatigue life of iron based powder metal parts
(2011)Electrolytic coating is one of the methods mainly used to provide corrosion resistance for the powder metal parts. The coatings have strong effects on mechanical properties of coated parts as well as on surface properties. ... -
A comparison on physical, structural, and photocatalytical properties of TiO2 nanopowders produced using sol-gel and flame spray pyrolysis
(2013)In this study, nanoscale photocatalyst TiO2 powders were synthesized via sol-gel and flame spray pyrolysis (FSP). Phase structures and ratios were analyzed by X-ray diffractometer (XRD). Size, specific surface area, and ... -
Degradation of contaminated industrial waste water using sol-gel derived Ru-doped TiO2 photocatalytic films
(Foundation for Environmental Protection and Research (FEPR), 2013)In this study, Ru-TiO2 films were deposited on glass substrates with a sol-gel route for degradation of contaminated industrial water. A solution with the Ru/Ti molar ratio of 0.05 was prepared using ruthenium and titanium ... -
Particle-size and morphology dependence of the preferred interface orientation in LiFePO4 nano-particles
(Royal Society of Chemistry, 2014)We gain new insights into the equilibrium properties and potential two-phase lithiation mechanisms in LiFePO4 nano-particles by conducting a first-principles investigation of the anisotropic chemical interfacial energy ... -
The effect of anodization parameters on the formation of nanoporous TiO2 layers and their photocatalytic activities
(Elsevier B.V., 2014)In this work, nanoporous titanium dioxide (TiO2) layers were successfully formed by electrochemical anodization method on titanium (Ti) surface in fluorine containing electrolytes with different processing parameters. The ... -
Optimization of coal flocculation with an anionic flocculant using a Box-Wilson statistical design method
(Oficyna Wydawnicza Politechniki Wroclawskiej, 2014)In this study, the Box-Wilson statistical experimental design method was employed to evaluate suspension pH, salt (CaCl2·2H2O) concentration and anionic flocculant (A-150) amount in flocculation of coal. Response function ... -
Characterization and photocatalytic properties of nanoporous titanium dioxide layer fabricated on pure titanium substrates by the anodic oxidation process
(Elsevier Ltd, 2014)Nanoporous titanium oxide (TiO2) layers were fabricated on commercially pure titanium (Cp-Ti) substrates by the anodic oxidation method under a potentiostatic regime. Anodic oxidation was performed in an aqueous solution ... -
Determination of optimum washing conditions for a lignite coal based on ash and sulfur content
(2014)This study deals with the maximization of composite yield subjected to multiple product constraints simultaneously based on float-sink data of a lignite coal from Yozgat-AyrIdam district of Turkey by using equal incremental ... -
Synthesis and characterization of silicon carbide powders converted from metakaolin-based geopolymer
(Blackwell Publishing Inc., 2016)Silicon carbide (SiC) ceramic powders were synthesized by carbothermal reduction in specific geopolymers containing carbon nanopowders. Geopolymers containing carbon and having a composition M2O·Al2O3·4.5SiO2·12H2O+18C, ... -
The thermodynamic stability of intermediate solid solutions in LiFePO4 nanoparticles
(Royal Society of Chemistry, 2016)Theoretical predictions from first principles and recent advances in in situ electrochemical characterization techniques have confirmed the presence of solid-solution states during electrochemical (de)lithiation of LiFePO4 ... -
Abrasive wear, structure, and mechanical aspects of Al–Al2O3 composites fabricated using various mixing media during P/M routes
(Springer New York LLC, 2016)The effects of mixing method during powder metallurgy (PM) routes on the abrasive wear behavior of Al–Al2O3p composite materials is investigated. For this purpose, starting Al powders with a constant volume fraction of 10% ... -
Thermal grooving by surface diffusion: a review of classical thermo-kinetics approach
(Hitit University, 2017)In polycrystalline materials wherever a grain boundary intersects a free surface and whenever the topographic variation associated with the atomic motion is favored by total free energy dissipation, the material surface ... -
Mechanochemical activation of sodium geopolymers containing carbon-nano powder
(Gazi Üniversitesi, 2017)Mekanokimyasal aktivasyon için 9 veya 18 mol karbon nano-tozlar içeren iki farklı sodyum geopolymer iyi bilinen geopolymer yöntemi ile hazırlanmıştır. 9 mol karbon, geopolimer üretimi aşamasında geopolimer reçineye dahil ... -
Geopolimerlerden mekanokimyasal aktivasyon ile silisyum karbür tip nano parçacıkların üretilebilirliğinin araştırılması
(Gazi Üniversitesi, 2017)Mekanokimyasal olarak 6, 12, 24, 48 saat süreyle aktive edilen ve M= (Na+ veya K+) olmak üzere, sodyum veya potasyum alkali metal içeren (M2OoAl2O3o4.5SiO2o12H2O+18C) geopolimer karbon kompozisyonlarının karbotermal ... -
Structural, electronic, and electrochemical analyses of sputter-coated Pt and Pt–Co/GCE electrodes with ultra-low metal loadings for PEM fuel cell applications
(Springer Netherlands, 2017)In this study, unsupported platinum and platinum–cobalt ultra-thin catalyst layers with varying metal loadings were prepared by a sequential magnetron sputtering technique. The deposited catalyst layers were characterized ... -
Fully reacted high strength geopolymer made with diatomite as a fumed silica alternative
(Elsevier Ltd, 2017)Geopolymers are formed by mixing of aluminosilicate sources with alkaline meta-silicate solution at room temperature. In the current study, diatomite of Turkish origin was fully utilized as a fumed silica alternative for ... -
Synthesis, characterization and electrochemical performance of Nb doped LiFePO4/C cathodes by mechanochemical activation
(Hitit University, 2018)We synthesized Nb-doped LiFePO4/C nano composite cathode materials by mechanochemical activation followed by a single step calcination. The starting chemicals of Li2CO3, FeC2O4.2H2O, NH4H2.PO4 and C6H8O7 as lithium, iron, ... -
Size controllable synthesis and characterization of cuO nanostructure
(Trans Tech Publications Ltd, 2018)In this study, copper oxide (CuO) nanostructures were successfully prepared by adding EG (ethylene glycol) and PEG (4000, 8000) (polyethylene glycol) via an in-situ chemical precipitation method. EG and PEG (4000, 8000) ...
