Kurum Yazarı "Kurama, Semra" WoS İndeksli Yayınlar Koleksiyonu İçin Listeleme
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Characterization of porosity and defect imaging in ceramic tile using ultrasonic inspections
Eren, Elif; Kurama, Semra; Solodov, Igor (Elsevier Sci LTD, 2012)In this study, three different ultrasonic nondestructive methods (NDT) used to characterize porosity and identify defects in ceramic materials were employed as alternative approaches to conventional systems. A contact ... -
A comparison of sintering techniques using different particle sized beta-SiAlON powders
Eser, Onur; Kurama, Semra (Elsevier Sci LTD, 2012)In the present study sintering behavior and mechanical properties of beta-SiAlON ceramics were investigated using different sintering techniques (gas pressured sintering (GPS), pressureless sintering and spark plasma ... -
Densification of Sr-Mg doped SiAlONs with GPS and SPS
Kurama, Semra; Herrmann, M. (Trans Tech Publications LTD, 2007)At temperature above 1200 degrees C, the thermal stability of alpha-SiAlON phases has been debated since 1992; however, it has been discussed if any alpha-SiAlON phase can be formed in Ce, La, Eu and Sr-doped SiAlON systems. ... -
Design of Alternative Composite Material to Available Tractor Cabins
Mihalic, Fatma; Kurama, Semra (Springer, 2016)All mobile machinery is at the risk of rolling over, depending on the machinery characteristics the need to protect operator from the risk of being injured or causing death due to rollover has been of prime importance in ... -
The design of compositions for multi-cation doped alpha-beta SiAlON ceramics by the Rietveld method
Kurama, Semra; Herrmann, M; Mandal, Hasan (Trans Tech Publications LTD, 2003)Although densification of alpha-beta-SiAlON ceramics is easier by using sintering additives, it is difficult to achieve the designed composition and therefore the mechanical properties after sintering. This is mainly due ... -
Determination of optimum insulation thickness for building's walls with respect to different insulation materials: a case study of International Hasan Polatkan Airport terminal
Akyüz, Mehmet Kadri; Altuntaş, Önder; Söğüt, Mehmet Ziya; Karakoç, Tahir Hikmet; Kurama, Semra (Inderscience Enterprises LTD, 2018)The systems in which energy is most intensely used in airport terminal buildings are HVAC systems. More efficient heating and cooling systems and the performance of the building envelope can provide significant reductions ... -
Effect of Al2O3 Nanofiller on ion conductivity, transmittance, and glass transition temperature of PEI: LiTFSI: PC: EC polymer electrolytes
Sakarya, Oğuzhan; Kurama, Semra; Günkaya, Göktuğ (Springer, 2016)In the present study, ion conductivity, optical properties, and glass transition temperatures are characterized for polymer electrolytes composed of poly(ethyleneimine) (PEI), lithium bis(trifluoromethane) sulfonylimide ... -
The effect of boron waste in phase and microstructural development of a terracotta body during firing
Kurama, Semra; Kara, Alpagut; Kurama, H (Elsevier Sci LTD, 2006)In the present study, a dewatering sieve waste (TSW) of Etibor Kirka Borax company (Turkey) was employed in different amounts in order to develop an experimental terracotta floor tile body composition in combination with ... -
Effect of grinding time and MgO source on Cordierite formation
Kurama, Semra; Ay, Nuran (Amer Ceramic Soc, 2002)… -
The Effect of Porosity and Glassy Phase Amount of Porcelain Tiles on Ultrasonic Velocity
Gültekin, Elif Eren; Öztürk, Zahide Bayer; Kurama, Semra (Australian Ceramic Society, 2015)Non-destructive testing (NDT) has been playing critical role in processing, testing and structural evaluation of materials. Ultrasonic testing is a widely used characterization method in non-destructive testing (NDT). The ... -
The effect of processing conditions, amount of additives and composition on the microstructures and mechanical properties of alpha-SiAlON ceramics
Kurama, Semra; Herrmann, M; Mandal, Hasan (Elsevier Sci LTD, 2002)A series of samples with yttrium alpha -SiAlON compositions and different amounts of additive has been fabricated from alpha -Si3N4, AIN, Al2O3 and Y2O3 starting powders, using gas pressure sintering and three different ... -
Effect of the processing on the production of cordierite-mullite composite
Özel, Emel; Kurama, Semra (Elsevier Sci LTD, 2010)In this study, effect of process on the production of cordierite mullite composite was studied. For this reason two different processing methods were used in the production of cordierite mullite composites. In first process, ... -
The effect of the wet-milling process on sintering temperature and the amount of additive of SiAlON ceramics
Eser, Onur; Kurama, Semra (Elsevier Sci LTD, 2010)In this study, nano-sized SiAlON powders were produced by wet milling at elevated speeds as a top-to-bottom process. Before the milling process, different milling times and mediums were performed for the determination of ... -
Effects of Modification of Glassy Phase Composition on Sintering Temperature of Sanitaryware
Sarı, Hasan; Kurama, Semra (Gazi University, Fac Engineering Architecture, 2013)In this study, the effect of glassy phase viscosity and chemical composition of sanitaryware body was investigated. Additionally, the effects of these parameters on the sintering temperature were researched. The amount of ... -
The effects of processing on the alpha <-> beta SiAlON transformation during cycling heat treatments
Kurama, Semra (Elsevier Science Sa, 2008)Typical alpha/beta-SiAlON starting composition of formula Nd(0.33)Si(9.38)Al(2.62)O(1.62)N(14.38) was densified by two different sintering processes, hot pressing (HP) and gas pressure sintering (GPS), using Nd(2)O(3) as ... -
The effects of sintering temperature on phase and pore evolution in porcelain tiles
Gültekin, Elif Eren; TopAteş, Gülsüm; Kurama, Semra (Elsevier Sci LTD, 2017)The phase and pore evolution of porcelain tiling against sintering temperature are investigated in this study. A standard porcelain tile composition was sintered at nine different temperatures between 1150 and 1230 degrees ... -
Formation of alpha-SiAlON ceramics containing scandium
Kurama, Semra; Mandal, Hasan (Trans Tech Publications LTD, 2004)alpha-SiAlON is able to accommodate cations into its crystal structure if the cations are sufficiently small in size, thus helping to reduce the volume of the remnant grain boundary phase after processing. Lutetium with ... -
Improvement in the Oxidation Resistance of beta-SiAlON Ceramics Produced from Mechanically Milled Powders
Eser, Onur; Kurama, Semra (Trans Tech Publications LTD, 2012)In the present study the oxidation behavior of beta-SiAlON ceramics, which were produced from conventional and high energy mechanical milled powders, was investigated. High energy mechanically milled powders have lower ... -
Improvement of elongated alpha-SiAlON ceramics by variation of the processing conditions and amounts of additives
Kurama, Semra; Herrmann, M; Mandal, Hasan (Trans Tech Publications LTD, 2002)Two types of Y-alpha -SiAlON composition, with different amounts of additional liquid phase were densified in a gas pressure sintering furnace using three different sintering cycles. One series of samples was heated up to ... -
The influence of different CaO source in the production of anorthite ceramics
Kurama, Semra; Özel, Emel (Elsevier Sci LTD, 2009)The effects of starting raw materials and firing conditions oil anorthite (CaAl2Si2O8) phase formation are investigated by differential thermal analysis (DTA)-thermogravimetry (TG) and X-ray powder diffraction (XRD). Four ...