Browsing Makale Koleksiyonu by Issue Date
Now showing items 1-20 of 286
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Sintering behaviour of precursor mullite powders and resultant microstructures
(Elsevier BV, 1996)Crystallization and sintering behaviour of two structurally different diphasic precursor mullite powders were studied. Powder derived from boehmite and colloidal silica formed mullite at around 1250°C and could be sintered ... -
? › ß reverse phase transformation in silicon carbide in silicon nitride-particulate-reinforced-silicon carbide composites
(American Ceramic Society, 1996)The ? › ß reverse transformation in SiC is observed in Si3N4-particulate-reinforced-SiC composites made from as-received ?-SiC and ?-Si3N4 powders. However, the transformation does not occur to any great extent in composites ... -
Reaction-bonded aluminium oxide (RBAO) process: II, the solid-state oxidation of RBAO compacts
(2000)The oxidation kinetics and the fraction of aluminum that is oxidized via solid-gas reaction in reaction-bonded aluminum oxide (RBAO) compacts are shown to be strongly dependent on the oxidation temperature and the ... -
Modeling anisotropic single crystal growth kinetics in liquid phase sintered ?-Al2O3
(Kluwer Academic Publishers, Dordrecht, Netherlands, 2000)Single crystals of ?-alumina with {0001}, {11¯20} and {01¯12} orientations were embedded in a matrix of liquid phase sintered alumina to study ?-alumina single crystal growth in the presence of a calcium aluminosilicate ... -
Mechanical properties of magnesia-spinel composites
(2002)A set of dense magnesia-magnesium aluminate spinel composites has been prepared by hot-pressing magnesia powder using 0 to 30 wt.% of spinel powder of mean particle size 3, 11 and 22 µm. Bend stength, modulus, and fracture ... -
The microstructural features of an alumina-mullite-zirconia refractory material corroded by molten glass
(Elsevier Sci LTD, 2003)An alumina-mullite-zirconia refractory penetrated by a standard soda-lime-silica glass was statically tested at 1370 degreesC for 72 h. Microstructural features and EDAX analysis of the compositions in the corroded region ... -
Young's modulus measurements of magnesia-spinel composites using load-deflection curves, sonic modulus, strain gauges and Rayleigh waves
(Elsevier Sci LTD, 2003)The extent of interlinking of the microcracking and a decrease in strength and modulus values were determined to be a function of both spinel particle size and volume fraction to allow calculation of thermal shock parameter, ... -
Quantitative X-ray diffraction analysis of reactive infiltrated boron carbide-aluminium composites
(Elsevier Sci LTD, 2003)Dense (> 98% of theoretical) boron carbide, (B4C)-aluminium (Al) composites were produced between 985 and 1370 degreesC by pressureless melt infiltration of Al alloys into porous B4C compacts under. argon (Ar) atmosphere. ... -
Mechanical properties and thermal shock behaviour of alumina-mullite-zirconia and alumina-mullite refractory materials by slip casting
(Elsevier Sci LTD, 2003)Strength and modulus values of slip-cast alumina-mullite-zirconia and alumina-mullite refractories have been determined as a function of quench temperature by air and water quenching. The resistance to fracture initiation ... -
The Microstructural Studies in Limonite Containing Satin and Opaque Wall Tile Glazes
(2003)There have been a number of studies to investigate possible use of limonite and limonite-based pigments in different ceramic glaze systems. In these researches it was reported that Eskisehir Mihaliccik region's limonite ... -
Interactions between a leadless glaze and a biscuit fired bone China body during glost firing - part III: effect of glassy matrix phase
(Elsevier Sci LTD, 2003)As the final part of the study, the interactions between a commercial leadless glaze and a simulated bone china body glass during glost firing at different temperatures have been investigated. Advanced techniques such as ... -
The effect of mullite on the mechanical properties and thermal shock behaviour of alumina-mullite refractory materials
(Elsevier Sci LTD, 2003)Mechanical properties and thermal shock behaviour of slip-cast alumina-mullite refractories have been investigated. There was a marked improvement in strength, Young's modulus and fracture toughness values with the addition ... -
The influence of zircon in a model aluminosilicate glass tank forehearth refractory
(Elsevier Sci LTD, 2003)Standard aluminosilicate forehearth refractories are normally fabricated with a small proportion of zircon to improve their performance. To identify possible bases for the action of the zircon, fine-grain aluminosilicate ... -
Production and characterisation of iron-chromium pigments and their interactions with transparent glazes
(Elsevier Sci LTD, 2003)In this study, production and characterisation of pigments by using less expensive raw materials such as limonite and chromite was undertaken. The resulting pigments were characterised by using X-ray diffraction (XRD) and ... -
Effect of the particle size distribution of spinel on the mechanical properties and thermal shock performance of MgO-spinel composites
(Elsevier Sci LTD, 2003)The influence of varying the amounts of spinel with a similar median particle size, but with different distribution, on the mechanical properties and thermal shock performance of MgO-spinel composites was investigated. ... -
Fast pyrolysis of sesame stalk: yields and structural analysis of bio-oil
(Elsevier Science BV, 2004)Sesame stalk pyrolysis experiments were conducted in a fixed-bed reactor in an attempt to determine the effects of pyrolysis temperature, particle size, heating rate and sweeping gas (N-2) flow rate on the product yields ... -
Thermal shock behaviour of magnesia-spinel composites
(Elsevier Sci LTD, 2004)The incorporation of up to 30% of spinel powder of median particle sizes 3, 11 and 22 mum into dense magnesia gives improved resistance to thermal shock as indicated both by the R''' thermal shock resistance parameters ... -
Fracture behaviour of magnesia and magnesia-spinel composites before and after thermal shock
(Elsevier Sci LTD, 2004)Microstructural changes, as a consequence of the thermal expansion mismatch between magnesia and spinel phases, and fracture behaviour of magnesia and spinel composites have been investigated as a function of spinel content ... -
Decolouration effect of WC addition on gas pressure sintered alpha-beta SiAlON ceramics
(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. ... -
Investigation of parameters affecting grain growth of sintered magnesite refractories
(Elsevier Sci LTD, 2005)The parameters influencing grain size of sintered magnesite such as temperature (1700 and 1800degreesC), time (19 and 50 min), cooling rate (5, 10 and 25degreesC min(-1)) and various particle size (-3; +3,-5; +5,-8; +8,-10 ...