Kurum Yazarı "Mandal, Hasan" WoS İndeksli Yayınlar Koleksiyonu İçin Listeleme
-
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 ... -
A comparative study of SiAlON ceramics
Mallik, Awadesh Kumar; Acikbas, Nurcan Çalış; Kara, Ferhat; Mandal, Hasan; Basu, Debabrata (Elsevier Sci LTD, 2012)Two different varieties of Si3N4 powders were used to prepare SiAlON ceramics. 100% beta-Si3N4 was used from refractory grade powders (B1) and another purer 98% alpha-Si3N4 (50A) powder was used to prepare the SiAlON ... -
Cytocompatibility property evaluation of gas pressure sintered SiAlON-SiC composites with L929 fibroblast cells and Saos-2 osteoblast-like cells
Kumar, Alok; Mallik, Awadesh Kumar; Açıkbaş, Nurcan Çalış; Yaygingol, Merve; Kara, Ferhat; Mandal, Hasan; Basu, Bikramjit (Elsevier Science BV, 2012)Although the oxide ceramics have widely been investigated for their biocompatibility, non-oxide ceramics, such as SiAlON and SiC are yet to be explored in detail. Lack of understanding of the biocompatibility restricts the ... -
Decolouration effect of WC addition on gas pressure sintered alpha-beta SiAlON ceramics
Ayas, Erhan; Kara, Alpagut; Mandal, Hasan; Turan, Servet; Kara, Ferhat (Elsevier Science BV, 2004)In this study, an attempt was made to mask an inhomogeneous gray colouration featured on the surfaces of the gas pressure sintered alpha-beta SiAlON ceramics containing 50% alpha and 50% beta SiAlONs in the form of spots. ... -
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 ... -
Development of alpha-beta SiAlON ceramics from different Si3N4 starting powders
Açıkbaş, N. Çalış; Kara, Ferhat; Mandal, Hasan (Trans Tech Publications LTD, 2009)alpha-beta SiAlON ceramics were produced from different starting Si3N4 powders including beta-Si3N4 and alpha-Si3N4 powders and mixtures of these powders. Gas pressure sintering was used for sintering. After sintering, ... -
Development of laminar type functionally graded SiAlON ceramics
Çalış, N; Kara, Alpagut; Kara, Ferhat; Mandal, Hasan (Trans Tech Publications LTD, 2004)In order to combine high hardness with high toughness, laminar type (two layers) functionally graded (FGM) SiAlON ceramics were developed. In a previous study achieved by the same authors, presence of a sharp transition ... -
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 ... -
Effect of different nucleation temperatures on the microstructural development of alpha-SiAlON ceramics
Kuşhan, Seniz Reyhan; Mandal, Hasan (Trans Tech Publications LTD, 2004)alpha-SiAlON ceramics with elongated grains were previously observed in different studies. Sintering conditions are known to have a significant role on the microstructural development. By the nucleation treatment application ... -
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 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 SiC addition on the thermal diffusivity of SiAlON ceramics
Akın, Seniz Reyhan Kushan; Turan, Servet; Gençoğlu, Pervin; Mandal, Hasan (Elsevier Sci LTD, 2017)Despite the fact that thermal conductivity is a crucial parameter for SiAlON ceramics with respect to their suitability in various applications, including high-temperature structural components, wear parts, and cutting ... -
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 ... -
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 ... -
Effects of different Si3N4 starting powders and sintering conditions on the grain morphology and mechanical properties of alpha-SiAlON ceramics
Kuşhan, Seniz Reyhan; Mandal, Hasan (Trans Tech Publications LTD, 2002)Nitrogen rich yttrium-cerium containing multi-cation alpha -SiAlON starting compositions have been prepared by gas pressure sintering using "conventional" alpha -Si3N4 or alpha-beta Si3N4 containing powder. The effect of ... -
Experimental and finite element study of the thermal conductivity of alpha-SiAlON ceramics
Kuşhan, Seniz Reyhan; Uzun, İbrahim; Doğan, Battal; Mandal, Hasan (Blackwell Publishing, 2007)The thermal conductivity of monolithic Y-Sm/alpha-SiAlON was evaluated using experimental data and finite element analysis. The thermal diffusivities of Y, Y-Dy, and Y-Ce/alpha-SiAlON ceramics were also investigated ... -
Fabrication of functionally graded SiAlON ceramics by tape casting
Açıkbaş, N. Çalış; Suvacı, Ender; Mandal, Hasan (Blackwell Publishing, 2006)Functionally graded SiAlON ceramics (FG-SiAlONs) were successfully prepared by the tape casting and lamination approach. Non-aqueous SiAlON slurries with five different alpha to beta-SiAlON ratios (85 alpha:15 beta, 70 ...