scholarly journals Effects of the size distribution of SiC powders on the microstructures and properties of liquid phase bonded porous SiC with neck bonding phases of Y4Al2O9, Y3A5O12, Y2Si2O7, and Al2O3

2021 ◽  
Vol 129 (11) ◽  
pp. 660-668
Author(s):  
Sung Il YUN ◽  
Sahn NAHM ◽  
Sang Whan PARK
Keyword(s):  
Liquid Phase ◽  
Size Distribution ◽  
Porous Sic

ANALYSIS OF GAS PERMEABILITY FOR LIQUID PHASE-SINTERED POROUS SiC COMPACT

2014 ◽  
Vol 17 (8) ◽  
pp. 705-713 ◽  
Author(s):  
Hikaru Maeda ◽  
Yoshihiro Hirata ◽  
Soichiro Sameshima ◽  
Taro Shimonosono
Keyword(s):  
Liquid Phase ◽  
Gas Permeability ◽  
Porous Sic

scholarly journals Size Distribution of Droplets in a Two Liquid-phase Mixture Compared between Liquid Spraying and Mechanical Stirring

2019 ◽  
Vol 35 (9) ◽  
pp. 955-960 ◽  
Author(s):  
Taisuke SHIMOGOUCHI ◽  
Hirochika NAGANAWA ◽  
Tetsushi NAGANO ◽  
Bernd GRAMBOW ◽  
Yuichiro NAGAME
Keyword(s):  
Liquid Phase ◽  
Size Distribution ◽  
Mechanical Stirring ◽  
Phase Mixture

High Porosity SiC Ceramics with a Narrow Pore Size Distribution

2008 ◽  
Vol 368-372 ◽  
pp. 840-842 ◽  
Author(s):  
Li Min Shi ◽  
Hong Sheng Zhao ◽  
Ying Hui Yan ◽  
Chun He Tang
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Phenolic Resin ◽  
High Porosity ◽  
X Ray Diffraction ◽  
Narrow Pore Size Distribution ◽  
X Ray ◽  
Sic Ceramics ◽  
Porous Sic

Using the coat mix process, porous SiC ceramics are fabricated using commercially available silicon powders and phenolic resin as the starting materials. The phase composition, morphology, pore size and pore size distribution of the obtained products are characterized by X-ray diffraction, scanning electron microscopy and mercury intrusion porosimeter. The results show that high porosity SiC ceramics with a narrow pore size distribution can be fabricated at 1500°C in vacuum by the coat mix process. The open pore porosity can reach up to 60%. The pore size varies in the range of 1-6 'm.

scholarly journals Impurities Accumulation on the Surface of Alumina Hydrate Particles in Bayer Technology

2019 ◽  
Vol 70 (2) ◽  
pp. 355-360
Author(s):  
Gheorghe Dobra ◽  
Sorin Iliev ◽  
Nicolae Anghelovici ◽  
Lucian Cotet ◽  
Laurentiu Filipescu
Keyword(s):  
Particle Size ◽  
Liquid Phase ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Alumina Hydrate ◽  
Surface Particle ◽  
Structural Surface ◽  
The Common ◽  
Metallic Impurities ◽  
Crystallization Stage

The purity, structural surface, particle dimensions, particle size distribution, and the associated reactivity of chemical and surface properties are the most important and most required properties of alumina hydrate special brands. The purpose of this paper concerns the common metallic impurities accumulation on the surface of alumina hydrate particles, during the sodium aluminates decomposition in liquid phase, during the entire aluminum hydroxide crystallization stage in the Bayer technology.

Production of SiC Materials by Reactive Infiltration

2014 ◽  
Vol 783-786 ◽  
pp. 1863-1866 ◽  
Author(s):  
Mario Caccia ◽  
Javier Narciso
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Optical Microscopy ◽  
Size Distribution ◽  
Mercury Porosimetry ◽  
Density Measurement ◽  
Carbon Precursor ◽  
Reactive Infiltration ◽  
Temperature And Pressure ◽  
Porous Sic

The use of oak sawdust as carbon precursor for SiC manufacture via reactive infiltration was studied. The effect of oak sawdust pressing parameters, temperature and pressure, on the final SiC's properties was studied. Final product's quality was evaluated through density measurement, and microstructure and pore size distribution variations were characterized with optical microscopy and mercury porosimetry. Pressed oak sawdust preforms were carbonized to obtain a carbon porous preform which was then infiltrated with melted silicon. Successful infiltration of preforms pressed at room temperatures were performed, to obtain a porous SiC. Hot pressed preforms were not satisfactory infiltrated due to a narrowing of their pores caused by SiC formation's expansiveness.

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