Başlık için Malzeme Bilimi ve Mühendisliği Bölümü listeleme
Toplam kayıt 444, listelenen: 178-197
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High-surface-area SBA-15-SO3H with enhanced catalytic activity by the addition of poly(ethylene glycol)
(Springer, 2013)The influence of poly(ethylene glycol) (PEG) and synthesis temperature in the synthesis of SBA-15-SO3H was investigated to evaluate the catalytic activity in the esterification of propionic acid with methanol. The catalysts ... -
Hybrid processing and anisotropic sintering shrinkage in textured ZnO ceramics
(Natl Inst Materials Science, 2010)We have studied the combined effects of the templated grain growth and magnetic alignment processes on sintering, anisotropic sintering shrinkage, microstructure development and texture in ZnO ceramics. Suspensions of 0-10 ... -
Hydrothermal synthesis of calcium hexaborate pentahydrate from local boric acid and its photoluminescence characteristic
(Springer, 2018)The aim of the study is to synthesize hydrated calcium hexaborates via a hydrothermal method with the use of local (obtained from Turkish deposits) boric acid. The effects of temperature and boric acid to water and calcium ... -
Identification of Ti incorporation into beta-SiAlON crystal structure through transmission electron microscopy techniques
(Elsevier Sci LTD, 2012)In this paper, we report the transmission electron microscopy (TEM) observations on the incorporation of Ti transition metal element into beta-SiAlON crystal structure in a bulk beta-SiAlON-TiN composite material. Considering ... -
Image analysis of sulfate attack on hardened cement paste
(Elsevier Sci LTD, 2008)This paper presents an investigation conducted on the sodium sulfate resistance of Portland cements with various C(3)A contents, and on two blended cements produced by replacing 40% Of low C3A cement with fly ashes having ... -
Improvement in the Oxidation Resistance of beta-SiAlON Ceramics Produced from Mechanically Milled Powders
(Trans Tech Publications LTD, 2012)In the present study the oxidation behavior of beta-SiAlON ceramics, which were produced from conventional and high energy mechanical milled powders, was investigated. High energy mechanically milled powders have lower ... -
Improvements on corrosion behaviours of MgO-spinel composite refractories by addition of ZrSiO4
(Elsevier Sci LTD, 2012)Corrosion behaviours of MgO-spinel-ZrSiO4 compositions were investigated. The influence of corrosion resistance based on the microstructural changes occurred due to the solubilities of constituents in corroded regions was ... -
Improvements on the mechanical properties and thermal shock behaviours of MgO-spinel composite refractories by ZrO2 incorporation
(Elsevier Sci LTD, 2012)Microstructural features and improvements on the mechanical properties and thermal shock behaviours of MgO-spinel composite refractories with ZrO2 addition were examined. ZrO2 incorporation into MgO-spinel led to improvements ... -
Improvements on the thermal shock behaviour of MgO-spinel composite refractories by incorporation of zircon-3 mol% Y2O3
(Elsevier Sci LTD, 2012)The effects of incorporations of zircon-3 mol% Y2O3 (Y) into MgO-spinel (M S) compositions to improve mechanical properties and thermal shock behaviour were investigated. Mechanical properties were measured, R R parameters ... -
In-situ synthesis and densification of HfB2 ceramics by the spark plasma sintering technique
(Elsevier Sci LTD, 2017)Hafnium diboride (HfB2) ceramics were in-situ synthesized and densified by the spark plasma sintering (SPS) method using HfO2 and amorphous boron (B) as starting powders. Both synthesis and densification processes were ... -
Incorporation of the transition metals (Cr and Fe) into beta-SiAlON crystal structure
(Elsevier Sci LTD, 2011)Outstanding properties for SiAlON ceramics can be obtained by tailoring the microstructure through alpha-SiAlON and beta-SiAlON phase content as well as a type of secondary phases. It is so far well known that while some ... -
Influence of beta-Si3N4 particle size and heat treatment on microstructural evolution of alpha:beta-SiAlON ceramics
(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 cell aspect ratio on architecture and compressive strength of titanium foams
(Elsevier Science Sa, 2011)Titanium foams have been of interest in dental and orthopedic implants over the past few decades on account of their excellent mechanical properties, chemical stability, and biocompatibility. A powerful tool, X-ray computed ... -
Influence of Deposition Technique on Growth and Resistivity of Ta/NiFe Nano Films.
(Int Union Crystallography, 2009)… -
The influence of different CaO source in the production of anorthite ceramics
(Elsevier Sci LTD, 2009)The effects of starting raw materials and firing conditions oil anorthite (CaAl2Si2O8) phase formation are investigated by differential thermal analysis (DTA)-thermogravimetry (TG) and X-ray powder diffraction (XRD). Four ... -
The influence of fine alumina particles on the mechanical properties and thermal shock behaviour of slip-cast alumina-mullite refractories
(Trans Tech Publications LTD, 2004)The object of this work is to improve understanding of relationships between microstructure and those mechanical properties likely to affect thermal shock behaviour of slip-cast alumina-mullite refractories. The incorporation ... -
Influence of post-annealing on electrical, structural and optical properties of vanadium oxide thin films
(2013)Vanadium oxide thin films were grown onto quartz substrates using the pulsed DC reactive magnetron sputtering technique at room temperature and afterwards post annealed under vacuum conditions in the temperature range from ... -
Influence of SiC addition on tribological properties of SiAlON
(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
(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 ... -
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 ...
