Ara
Toplam kayıt 237, listelenen: 31-40
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 ...
Production technology and provenance study of brittle wares belonging to the late roman period from Harabebezikan/Turkey
(Elsevier Sci LTD, 2017)
This study represents analyses of Brittle Ware sherds dated back to the Late Roman period found in the Harabebezikan Mound (Banhurfa/Turkey). Wavelength dispersive X-ray fluorescence (WDXRF) was performed for chemical ...
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, ...
The mechanism for the colour change of iron chromium black pigments in glazes through transmission electron microscopy techniques
(Elsevier Sci LTD, 2011)
Black iron chromium (Fe-Cr) bearing oxide pigments are generally utilised as effective colourants in a wide variety of applications. However, in the case of their use within ZnO-containing glazes, they yield an undesirable ...
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 ...