Yazar "Mandal, Hasan" için Fen Bilimleri Enstitüsü listeleme
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a-SiAION ceramics densified with mixed oxide sintering additives
Mandal, Hasan; Oberacker, R. (2000)Densification and stabilization of ?-sialon ceramics were investigated by using oxides of large cations (Sr2+, La3+, Ce3+, Nd3+) and their equi-molar mixtures with CaO or Yb2O3. All multi-cation and single cation (only ... -
a-SİAION faz bölgesinin tespiti ve mikroyapısının karakterizasyonu
Kurama, Semra (Anadolu Üniversitesi, 2003)Bu tezde, tek ve çok katyonlu a-SiAION seramiklerinin faz ilişkileri, kararlılıkları ve mikroyapısal gelişimleri incelenmiştir. a-SiAION seramiklerinin mekanik ve kimyasal özelliklerinin kontrolünün dikkatli bir başlangıç ... -
alpha ->beta sialon transformation in calcium-containing alpha-SiAlON ceramics
Mandal, Hasan; Thompson, D. P. (Elsevier Sci LTD, 1999)Recent studies on rare earth densified a-sialon ceramics have shown that the resulting alpha-sialon product, present either as a single phase or in conjunction with beta-sialon, is unstable when heat treated at lower ... -
Aşınma direnci yüksek yer karosu sırlarının üretim imkanının araştırılması
Kara Kilerci, Damla (Anadolu Üniversitesi, 2002)Bu çalışmanın amacı, yüzey özelliklerini geliştirmek için fritlerden kristalleştirme (cam-seramik yöntemi) veya sırlara kristallerin ilavesi ile aşınmaya dayanıklı yer karosu sırları geliştirmektir. Bir diğer amaç, özellikle ... -
The design of compositions for multi-cation doped ?-ß SiAlON ceramics by the Rietveld method
Kurama, Semra; Herrmann, M.; Mandal, Hasan (2003)Although densification of ?-ß-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 to the ... -
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 ... -
Dizel partikül filtre (DPF) üretimine yönelik Si3N4 esaslı malzeme geliştirilmesi
Topateş, Gülsüm (Anadolu Üniversitesi, 2013)Dizel partikül filtrelerden artan beklentileri karşılayabilmek için yapılan çalışmalar; yeni malzeme arayışı ve filtre yapısının değiştirilmesi üzerine odaklanmaktadır. Yapılan tez çalışması ile ticari seramik dizel partikül ... -
The driving force for ??ß transformation in rare earth ? sialon ceramics
Mandal, Hasan; Thompson, D. P. (1997)In-situ ??ß sialon transformation in rare earth sialon systems, which occurs when dense ?- and ?/ß-sialon samples are heat-treated at temperatures in the range 1300-1600°C was first observed five years ago, and has generated ... -
The effect of different nucleation temperatures on the grain morphology of ?-SiAlON ceramics
Kuşhan, Seniz Reyhan; Mandal, Hasan (2003)Nitrogen rich yttrium-cerium containing multi-cation ?-SiAlON starting compositions were prepared by gas pressure sintering using conventional ?-Si3N4 powder. Microstructural characterization of the two stage sintered ... -
The effect of different nucleation temperatures on the grain morphology of alpha-SiAlON ceramics
Kuşhan, Seniz Reyhan; Mandal, Hasan (Trans Tech Publications LTD, 2003)Nitrogen rich yttrium-cerium containing multi-cation alpha-SiAlON starting compositions were prepared by gas pressure sintering using conventional alpha-Si3N4 powder. Microstructural characterization of the two stage ... -
The effect of heat-treatment on the performance of sub-micron SiCp-reinforced alpha-beta sialon composites .1. Preparation of agglomerate-free starting powders
Liu, Q; Gao, L; Yan, DS; Mandal, Hasan; Thompson, DP (Elsevier Sci LTD, 1997)In order to prepare good-quality, dense, SiCp-reinforced alpha-beta sialon composites by hot-pressing, a technique was developed to prevent agglomeration of the SiC grains during powder processing. For this purpose, the ... -
The effect of heat-treatment on the performance of sub-micron SiCp-reinforced alpha-beta sialon composites .2. Heat-treatment studies
Liu, Q; Gao, L; Yan, DS; Mandal, Hasan; Thompson, DP (Elsevier Sci LTD, 1997)The effects of heat-treatment on alpha --> beta sialon transformation in dense, agglomerate-free Ln-sialon/SiCp(Ln=Nd,Yb) composites are reported. The stability of the alpha-sialon phase is not only dependent on the ... -
The effect of heat-treatment on the performance of sub-micron SiCp-reinforced alpha-beta sialon composites .3. Mechanical properties
Liu, Q; Gao, L; Yan, DS; Mandal, Hasan; Thompson, DP (Elsevier Sci LTD, 1997)Agglomerate-free SiCp-reinforced Ln-sialon (Ln=Nd and Yb) composites were fabricated by hot-pressing and by pressureless sintering to evaluate the improvement in microstructure and mechanical properties that could be ... -
The effect of heat-treatment on the performance of submicron SiCp-reinforced ?-ß sialon composites: III. Mechanical properties
Liu, Q.; Gao, L.; Yan, D. S.; Mandal, Hasan; Thompson, D. P. (Elsevier BV, 1997)Agglomerate-free SiCp-reinforced Ln-sialon (Ln=Nd and Yb) composites were fabricated by hot-pressing and by pressureless sintering to evaluate the improvement in microstructure and mechanical properties that could be ... -
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 starting composition, type of rare earth sintering additive and amount of liquid phase on ? ? ß sialon transformation
Camuşcu, N.; Thompson, D. P.; Mandal, Hasan (1997)Five different ?-ß sialon and ?-sialon compositions have been prepared using different rare earth oxide additives namely, neodymium, samarium, dysprosium and ytterbium. Post-sintering heat treatments have been carried out ... -
Effect of starting composition, type of rare earth sintering additive and amount of liquid phase on alpha reversible arrow beta sialon transformation
Camuşcu, N.; Thompson, DP; Mandal, Hasan (Elsevier Sci LTD, 1997)Five different alpha-beta sialon and alpha-sialon compositions have been prepared using different rare earth oxide additives namely, neodymium, samarium, dysprosium and ytterbium., Post-sintering heat treatments have been ... -
Effect of starting Si3N4 powder type and sintering conditions on grain morphology of alpha-SiAlON ceramics
Kuşhan, Seniz Reyhan; Mandal, Hasan (Maney Publishing, 2002)Nitrogen rich multication alpha-SiAlON ceramics doped with Y-Ce have been densified by gas pressure sintering using alpha-Si3N4 or mixed beta/alpha-Si3N4 starting powder. The effects of alpha-SiAlON nucleation and growth ... -
Effect of starting Si3N4 powder type and sintering conditions on the grain morphology of ?-SiAlON ceramics
Kuşhan, Seniz Reyhan; Mandal, Hasan (2002)Nitrogen rich neodymium-ytterbium containing multi-cation ?-sialon starting compositions have been prepared by gas pressure sintering using "conventional" ?-Si3N4 or plasma produced ß-Si3N4 powder. The effect of ?-SiAlON ... -
Effects of different Si3N4 starting powders and sintering conditions on the grain morphology and mechanical properties of ?-SiAlON ceramics
Kuşhan, Seniz Reyhan; Mandal, Hasan (2001)The preparation of ?-SiAlON microstructures by ß-Si3N4 starting powder or by applying nucleation step during sintering was studied. The application of sintering cycles on nucleation effect and the effect of different Si3N4 ...