Yazar "Kurama, Semra" için listeleme
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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 ... -
Endüstriyel uygulamalar için SiAlON/cam kompozit sistemlerinin mekanik ve ısıl şok özelliklerinin incelenmes
Akkaşoğlu, Ezgi (Anadolu Üniversitesi, 2016)Bu çalışmanın temel amacı, endüstriyel ve mühendislik amaçlı uygulamalarda yaygın olarak kullanılan ?-SiAlON seramiklerin yüksek sıcaklık mekanik özelliklerini koruyarak ısıl şok dayanımının iyileştirilmesidir. Bu amaçla, ... -
Formation of ?-SiAlON ceramics containing scandium
Kurama, Semra; Mandal, Hasan (2004)?-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 an ... -
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 ?-SiAlON ceramics by variation of the processing conditions and amounts of additives
Kurama, Semra; Herrmann, M.; Mandal, Hasan (2001)Two types of Y-?-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 1825°C ... -
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 ... -
Investigation of borax waste behaviour in tile production
Kurama, Semra; Kara, Alpagut; Kurama, H. (Elsevier Sci LTD, 2007)Although there are various studies published in the relevant literature on the use of borates in tile production, borax waste has been mainly used in place of feldspar and the results showed that borate migration to the ... -
Investigation of the influence of initial powder size on the optical properties of Dy-alpha-SiAlON ceramics fabricated by gas pressure sintering
Avcıoğlu, Suna; Kurama, Semra (Elsevier Sci LTD, 2017)Translucent Dy3+ doped alpha-SiAlON ceramics were successfully fabricated by the gas pressure sintering (GPS) method. The efficacy of this sintering technique also the affects initial particle size on densification, final ... -
Investigation properties of BaO/RO-Al2O3-R2O3-B2O3-SiO2 glass-ceramic sealants for solid oxide fuel cell
Kurama, Semra; Saydam, Gamze (Australian Ceramic Society, 2017)Glass-ceramics are commonly used as sealing materials for planar solid oxide fuel cells (SOFCs). The major requirements of stack and module builders for these materials are the stability of the coefficient of thermal ... -
İndüksiyon ocağı astar malzemesinin farklı katkı malzemeleri ile kullanım performansının arttırılması
Cengiz, Uğur (Anadolu Üniversitesi, 2017)Demir çelik üretiminde maliyet optimizasyonu çalışmaları gereği refrakter malzemelerin performanslarında sürekli iyileştirme faaliyetleri zorunlu olmaktadır. Aynı zamanda kendiliğinden dökülebilen, dövme harçları ve ... -
Mg+2 and Ce+3 doped ?-SiAlON ceramics
Kurama, Semra; Mandal, Hasan (2004)In the present work, stabilization of MgO and CeO2 in ?-SiAlON structure is studied. Mg and CeO2 were used in 50:50 molar ratios as additives. The mixture was sintered at 1830°C for 1 hour in gas pressure sintering furnace ... -
Mg+2 and Ce+3 doped alpha-SiAlON ceramics
Kurama, Semra; Mandal, Hasan (Trans Tech Publications LTD, 2004)In the present work, stabilization of MgO and CeO2 in alpha-SiAlON structure is studied. Mg and CeO2 were used in 50:50 molar ratios as additives. The mixture was sintered at 1830degreesC for 1 hour in gas pressure sintering ... -
Microstructural evolution R-?-SiAlON ceramics (R=Y, Y+Sm and Sm)
Kurama, Semra; Mandal, Hasan (2004)Yttrium or samarium doped ?-SiAlON composition was sintered using gas pressure sintering through two different sintering procedures. One group of samples was heated up to 1800°C and then held for 1h while another group of ... -
Microstructural evolution R-alpha-SiAlON ceramics (R=Y, Y+Sm and Sm)
Kurama, Semra; Mandal, Hasan (Trans Tech Publications LTD, 2004)Yttrium or samarium doped alpha-SiAlON composition was sintered using gas pressure sintering through two different sintering procedures. One group of samples was heated up to 1800degreesC and then held for 1 h while another ... -
Optimization of ?-sialon microstructure by heat treatment
Kurama, Semra (2008)Nd-doped ?-SiAlON starting composition (Nd0.33Si 9.38Al2.62O1.62N14.38) was prepared by gas pressure sintering at 1825°C for 3 hrs. In order to explore the effect of post heat treatment on the developments of elongated ... -
Optimization of alpha-sialon microstructure by heat treatment
Kurama, Semra (Trans Tech Publications LTD, 2008)Nd-doped alpha-SiAlON starting composition (Nd(0.33)Si(9.38)Al(2.62)O(1.62)N(14.38)) was prepared by gas pressure sintering at 1825 degrees C for 3 hrs. In order to explore the effect of post heat treatment on the developments ...