Güncel Gönderiler: Metalurji ve Malzeme Mühendisliği Bölümü
Toplam kayıt 39, listelenen: 21-39
-
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 ... -
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. ... -
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 ... -
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 ... -
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 ... -
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 ... -
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% ... -
Effects of nitridation time and precursor particle size on yield of β-SiAlON synthesized from calcined kaolinite
(Springer New York LLC, 2019)Carbothermal reduction and simultaneous nitriding (CTRN) of natural aluminosilicates is a method used to obtain phases of Si–Al–O–N system. SiAlON phases have important applications, such as high technology ceramics, for ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
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) ... -
In situ carbothermal reduction/nitridation carbon-nano powder added geopolymer composites
(American Ceramic Society, 2014)Geopolymer was prepared by mixing metakaolin (Al2O3 center dot SiO2) with sodium water glass solution and then the activated carbon nano powder was added the geopolymer. To determine the best composition for carbothermal ... -
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, ... -
Simulation of phase equilibria in high chromium white cast irons
(Uludağ University, 2018-12)In this study, using the Materials Calculator software program, the pseudo binary phase diagrams (i.e. isoplethal maps) of high chromium white cast irons (~19% in weight) with different molybdenum contents were simulated. ... -
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, ...
