Güncel Gönderiler: Seramik Mühendisliği
Toplam kayıt 272, listelenen: 1-20
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Seramik sanayii hızlı pişirim fırınlarda kullanılan rulo malzemesi müllitin üretimi ve mekanik özelliklerinin belirlenmesi
(1999)Bu çalışmada, $\alpha-Al_2O_3$ ve kaolin kullanılarak, müllit $(3Al_2O_3. 2SİO_2)$ matriks elde edilmiş ve bu malzemenin seramik hızlı pişirim fırınlarının bir yapı elemanı olan döner rulo malzemesi yerine kullanılabilme ... -
The Crystallography of Interphase Boundaries Between Silicon Carbide and Silicon Nitride in Silicon Nitride— Silicon Carbide Particulate Composites
(Kluwer Academic Publishers, Dordrecht, Netherlands, 2000)Interphase boundaries between 3C SiC grains and two different ß-Si3N4 morphologies in Si3N4-SiC composites have been studied by transmission electron microscopy. In general, boundaries between small ß-Si3N4 intragranular ... -
New developments in ? -SiAlON ceramics
(1999)Two different ?-sialon compositions have been densified by either pressureless sintering or capsul-free sinter HIPing using either single cation namely strontium, lanthanum, cerium, neodymium or their equimolar mixtures ... -
Preparation of multiple-cation ?-SiAlON ceramics containing lanthanum
(1999)Until recently, it was accepted that Ce 3+ cations, with an ionic radius (r) of 1.03 Å, were too large to form an ?-SiAlON structure. However, more-recent studies have shown that cerium cations can be incorporated into ... -
Effect of starting composition, type of rare earth sintering additive and amount of liquid phase on ? ? ß sialon transformation
(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 ... -
Seramik sanayii hızlı pişirim fırınlarda kullanılanan rulo malzemesi müllitin üretimi ve mekanik özelliklerinin belirlenmesi
(Scientific and Technical Research Council of Turkey, Ankara, Turkey, 1999)A mullite matrix ceramic was developed for use as the roller material in fast fire kilns. Samples of the mullite ceramic were produced from mixtures of domestic ?-Al2O3 and kaolin clay through conventional methods of ceramic ... -
The effect of heat-treatment on the performance of submicron SiCp-reinforced ?-ß sialon composites: III. Mechanical properties
(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 influence of silicoferrochromium fume on concrete properties
(1995)Silicoferrochromium fume containing 85.5% SiO 2 was investigated to determine whether it could be used as an admixture in concrete to increase its strength. The fume was added at the dosage rates of 0-5 % by weight of ... -
Interphase boundaries between hexagonal boron nitride and beta silicon nitride in silicon nitride-silicon carbide particulate composites
(1997)Inter phase boundaries between hexagonal boron nitride and Q-Si3N4 in hot isostatically pressed Si3N4-SiC particulate composites, in which boron nitride appears as a trace contaminant, have been examined using high resolution ... -
Optimization and improvement of sialon ceramics with new heat treatment techniques
(1997)Sialons are of interest for use as engineering materials for high temperature (>1000°C) applications becuase they retain good mechanical properties at these temperatures, whereas competing metallic materials are weak and ... -
The driving force for ??ß transformation in rare earth ? sialon ceramics
(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 ... -
?ݧ Sialon Transformation in Calcium-containing ? -SiAlON Ceramics
(1999)Recent studies on rare earth densified ?-sialon ceramics have shown that the resulting ?-sialon product, present either as a single phase or in conjunction with ß-sialon, is unstable when heat treated at lower (1350-1600°C) ... -
Thermal stability of rare earth densified ?-sialon ceramics
(1997)Typical ?-sialon and mixed ?-ß sialon starting compositions were densified by either hot pressing or pressureless sintering using the oxides of Yb, Dy, Sm and Nd. The resulting materials were heat-treated at 1450°C for up ... -
Effects of cobalt, copper, manganese and titanium oxide additions on the microstructures of zinc containing soft porcelain glazes
(2002)Different types of glazes, which are nearly all based upon silicate compositions, are used to meet a wide range of requirements in service. Many artistic effects are achieved by departing from a clear, smooth, transparent ... -
The design of compositions for multi-cation doped ?-ß SiAlON ceramics by the Rietveld method
(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 ... -
Chemical durability behaviour of bulk glasses in the SrO-Mn2O3Fe2O3-MgO-ZrO 2-SiO2 (SMFMZS) system
(2001)It is known that the SrO-MgO-ZrO2-SiO2 (SMZS) system glasses with 40 weight % silica content seem to give a very high chemical endurance against highly alkaline solutions and can be recommended for the reinforcement of ... -
Transmission electron microscopy of SrO containing multi-cation doped ?-SiAlON ceramics
(2002)An advantage of ?-SiAlON is that it can accommodate cations of sintering additives and hence reduces the amount of deleterious remnant intergranular amorphous phase. However, it is believed that relatively large cations ... -
Effect of starting Si3N4 powder type and sintering conditions on the grain morphology of ?-SiAlON ceramics
(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 ... -
a-SiAION ceramics densified with mixed oxide sintering additives
(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 ...
