Ara
Toplam kayıt 244, listelenen: 41-50
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. ...
Chemical, morphological, and kinetic study of lead extraction from the Koni Mansur polymetallic deposit
(Elsevier Science BV, 2019)
Located in the north of Tajikistan, the Koni Mansur is a rich polymetallic deposit that besides other metals has high concentration of lead-containing mineral galena. The hydro metallurgical extraction of lead from the ...
Effect of activators and calcination on luminescence properties of åkermanite type phosphors
(Scientific Publishers, 2015)
Ákermanite type Ca2MgSi2O7 phosphors activated with different types of rare earths have been synthesized through a solid state reaction method under weak reducing atmosphere and/or open atmosphere. The phase properties of ...
Wear behaviour of alpha- and alpha/beta-SiAlON ceramics stabilized with Nd2O3 and Y2O3
(Elsevier Sci LTD, 2009)
alpha- and alpha/beta-SiAlON compositions, doped with Y2O3 or Nd2O3, were densified by gas pressure sintering (GPS). The wear and mechanical properties of the materials were investigated and compared to beta-Si3N4 materials. ...
Spectroscopic analysis of pigments and inks in manuscripts: II. Islamic illuminated manuscripts (16th-18th century)
(Elsevier Science BV, 2014)
Pigments and inks in five Islamic illuminated manuscripts, dated from 16th to 18th century, were investigated by micro-Raman spectroscopy and SEM-EDX analyses. Micro-Raman spectroscopy was employed for characterization of ...
Study of metal injection molding of highly porous titanium by physical modeling and direct experiments
(Elsevier Science Sa, 2014)
The prospects of metal injection molding (MIM) technique for manufacturing of highly porous titanium parts was studied by physical modeling, based on feedstock warm compaction experiments. The space holder method and typical ...
Production and characterisation of granulated frit to achieve anorthite based glass-ceramic glaze
(Elsevier Sci LTD, 2015)
For the development of matt-transparent glass ceramic coating applied on the porcelain tile, the CaO-Al2O3-SiO2 system was studied. Sinterization and devitrification behavior of granulated frits and viscosity change with ...
Catalytic pyrolysis of biomass: Effects of pyrolysis temperature, sweeping gas flow rate and MgO catalyst
(Pergamon-Elsevier Science LTD, 2010)
Cotton seed, as a biomass source, is pyrolysed in a tubular fixed-bed reactor under various sweeping gas (N(2)) flow rates at different pyrolysis temperatures. In the non-catalytic work, the maximum bio-oil yield was ...
Spark plasma sintering of Co-WC cubic boron nitride composites
(Elsevier Science BV, 2009)
25 vol.% cubic boron nitride (cBN) added tungsten carbide (WC) powders containing 6 wt.% Co (WC-6Co) were densified by spark plasma sintering (SPS) technique under different experimental conditions and the effect of cBN ...
Sr2+-Mg2+-doped SiAlON ceramics
(Blackwell Publishing, 2006)
In the present work, multi-cation-doped (Sr2+-Mg2+) SiAlON ceramics were investigated. MgO and SrO were used in 100:0 and 50:50 molar ratios. The mixture was sintered at 1800 degrees and 1830 degrees C for 1 h in a gas ...