Browsing by Author "Kara, Ferhat"
Now showing items 21-40 of 89
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Effect of earth alkaline oxides on firing behaviour of porcelain stoneware
Çiğdemir, G.; Kara, Alpagut; Kara, Ferhat (Techna Srl, 2010)Aim of this study was to investigate the relations between chemical composition and firing behaviour of porcelain stoneware formulations. The effects of magnesia and/or calcia incorporation in varying amounts into a standard ... -
Effect of heat treatment on green machinability of SiAlON compacts
Çelik, Ali; Yaman, Halil; Turan, Servet; Kara, Alpagut; Kara, Ferhat (Elsevier Science Sa, 2014)SiAlON based ceramics are promising materials for wear applications such as wire extrusion dies, pipe bending rollers, etc. due to their outstanding mechanical properties both at high and low temperatures. To be able to ... -
Effect of sintering conditions and heat treatment on the properties, microstructure and machining performance of alpha-beta-SiAlON ceramics
Açıkbaş, N. Çalış; Yurdakul, Hilmi; Mandal, Hasan; Kara, Ferhat; Turan, Servet.; Kara, Alpagut; Bitterlich, B. (Elsevier Sci LTD, 2012)The properties of SiAlON ceramics are strongly affected by the composition and structure of the intergranular phase, which are controlled by dopants, sintering conditions and starting silicon nitride (Si3N4) powder ... -
The effect of z value on intergranular phase crystallization of alpha(1)/beta(1)-SiAlON-TiN composites
Açıkbaş, N. Çalış; Kara, Ferhat (Elsevier Sci LTD, 2017)Relationship between z value and intergranular phase (IGP) chemistry has not been completely developed to date for SiAlON based materials. In this study, the effect of z value of beta(1)-SiAlON on crystallization and ... -
Emniyet Performans Göstergelerinin Değerlendirilmesi: Türkıye’deki Uçuş Eğitim Okulları Bağlamında Bır İnceleme
Gerede, Ender; Yaşar, Mehmet (2017)Havayolu taşımacılığının sunduğu faydaların elde edilmesi havayolu taşımacılığının emniyetli bir biçimde sürdürülebilmesi ile mümkündür. Uluslararası Sivil Havacılık Örgütü emniyeti daha da artırmak ve kaza sayılarını ... -
Engopsuz sırlı granit üretimi için sır kompozisyonları geliştirilmesi
Yazırlı, Berkay (Anadolu Üniversitesi, 2017)Seramik karolarda sırlar sağladığı fiziksel avantajların yanı sıra ürünün estetik unsurlarını belirleyen temel malzemelerdir. Engop ise bünye ve sır arasına uygulanan, bünyeden gelen rengi örterek, yüzeyi dekorlama işlemi ... -
Fresnel contrast analysis of composition changes and space charge at grain boundaries in mullite
Kara, Ferhat; Dunin-Borkowski, R. E.; Boothroyd, C. B.; Little, J. A.; Stobbs, W. M. (Elsevier Science B.V., Amsterdam, Netherlands, 1996)Grain boundaries in two mullite specimens have been characterised using Fresnel contrast analysis in the transmission electron microscope. A ratio of the scattering potential differences ?V between the grains and the grain ... -
Functionally graded SiAlON ceramics
Çalış, N; Kuşhan, Seniz Reyhan; Kara, Ferhat; Mandal, Hasan (Elsevier Sci LTD, 2004)Functionally graded SiAlON ceramics were developed by three different methods to improve the mechanical properties of SiAlONs; powder bed, rapid cooling and laminating. beta-SiAlON compacts were embedded in two different ... -
Fundamentals for optimization of binding for high refractory mullite products
Başpınar, M. Serhat; Schulle, W; Kara, Ferhat (Trans Tech Publications LTD, 2004)Properties of the binder matrix affect the quality of the refractory. Better qualities are possible if the binding is optimum. Mechanical properties, thermal shock resistance, creep and corrosion behaviour of the mullite ... -
Glass-ceramic glazes in the CaO-SiO2 system
Alptekin, K; Kara, Ferhat (Trans Tech Publications LTD, 2004)Glass ceramic glazes were developed in the system of CaO-SiO2 system. Compositions containing B2O3 and K2O as fluxing agent were melted at 1450degreesC and fritted. Glazes for porcelain tiles were formulated by using these ... -
Heterojen içyapıya sahip seramik kesici uçların geliştirilmesi
Kara, Ferhat; Anadolu Üniversitesi, Fen Bilimleri Enstitüsü, Malzeme Bilimi ve Mühendisliği Anabilim Dalı; Akkaşoğlu, Ufuk (Tez (doktora) - Anadolu Üniversitesi, 2018)Metalik malzemelerin üretiminin büyük çoğunluğunda ürüne son şeklini veren süreç talaşlı imalattır. Bu durum havacılık sektörü için de geçerlidir ve uçak motorlarında kullanılan parçaların üretiminde talaşlı imalat ... -
High strength diopside containing porcelain tiles
Cavac, M; Kara, Ferhat (Trans Tech Publications LTD, 2004)A new diopside based porcelain tile is developed. Raw materials containing a frit crystallising to diopside. Ukrainian clay, calcite, magnesite and quartz have formulated so as to form diopside during firing and sintered ... -
Homojen çöktürme yöntemi ile alümina üretimi
Şahin, Gülcan (Anadolu Üniversitesi, 2006)Bu çalışmada alüminyum sülfat tuzundan homojen çöktürme yöntemi ile üre kullanılarak mikronaltı boyuta sahip alümina tozunun üretilebilirliği araştırılmıştır. Sırasıyla alüminyum sülfat ve üre su içinde çözündürüldükten ... -
Hydrated aluminium sulfate precipitation by enzyme-catalysed urea decomposition
Kara, Ferhat; Şahin, G (Elsevier Sci LTD, 2000)Hydrated basic aluminium hydroxide precipitates were obtained from aluminium sulphate solution at room temperature and at 92 degrees C by using urea. Enzyme urease was used to decompose urea at room temperature. It was ... -
Improvement of sintering and microstructural homogeneity of a diphasic mullite
Kara, Ferhat; Şener, O (Elsevier Sci LTD, 2001)Effect of seeding of boehmite-colloidal silica mixture with aluminium sulphate-colloidal silica mixture on its mullite formation and sintering behaviours and microstructural development was studied. It was observed that ... -
Influence of beta-Si3N4 particle size and heat treatment on microstructural evolution of alpha:beta-SiAlON ceramics
Açıkbaş, N. Çalış; Kumar, R.; Kara, Ferhat; Mandal, Hasan; Basu, B. (Elsevier Sci LTD, 2011)In the present study, we report the effects of starting beta-Si3N4 particle sizes and post-sintering heat treatment on microstructure evolution and mechanical properties of prepared alpha-beta SiAlON ceramics. Three different ... -
Influence of SiC addition on tribological properties of SiAlON
Mallik, Awadesh Kumar; Reddy, K. Madhav; Açıkbaş, Nurcan Çalış; Kara, Ferhat; Mandal, Hasan; Basu, Debabrata; Basu, Bikramjit (Elsevier Sci LTD, 2011)The tribological properties of gas pressure sintered SiAlON and its composite with 18 wt% silicon carbide (SiC) against two different mating materials, i.e., alumina and SiAlON are evaluated. SiAlON and SiAlON-18%SiC ... -
Influence of type of cations on intergranular phase crystallisation of SiAlON ceramics
Açıkbaş, N. Çalış; Kara, Alpagut; Turan, Servet; Kara, Ferhat; Mandal, Hasan; Bitterlich, B. (Trans Tech Publications LTD, 2007)25 alpha:75 beta SiAION composition was designed with different cations and at different molar ratios. Effect of the type of cations both on the composition and the type of intergranular phase investigated after gas pressure ... -
Interactions Between AlN and SiAlON Ceramics
Kalemtaş, Ayşe; Acikbas, N. Çalış; Kara, Ferhat; Mandal, Hasan; Krnel, K.; Kosmac, T. (Trans Tech Publications LTD, 2009)In the present study, interactions between AlN and SiAlON laminated couples were investigated after gas pressure (GPS) and spark plasma sintering (SPS) by scanning electron microscopy (SEM) and energy dispersive x-ray ... -
Investigation on the performance of SiAlON ceramic drills on aerospace grade CFRP composites
Çelik, Ali; Lazoğlu, İsmail; Kara, Alpagut; Kara, Ferhat (Elsevier Science Sa, 2015)Carbon fiber reinforced polymer (CFRP) composites are widely used in aircraft structure due to their outstanding physical and mechanical properties. Drilling is one of the most critical operation in the handling of CFRP ...