Materials Literature
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Ce3+:(Lu0.7Y0.25La0.05)2O3 transparent ceramics were fabricated with nanopowders and sintered in H2 atmosphere. The spectral properties of Ce3+:(Lu0.7Y0.25La0.05)2O3 transparent ceramics were investigated and the luminescence of Ce3+ in the solid solution of Lu2O3, Y2O3 and La2O3 has been found. The ceramics has high…
The radiation shielding properties of steel and its variation with the boronizing process have been investigated. For this purposes the linear attenuation coefficients of steel have been measured before and after boronizing the steel at the photon energy of 662 and 1250 keV. The measured results before boronizing were…
The toxicological effect of TiO 2 nanoparticles with different crystal structure (80 nm for rutile and 155 nm for anatase) on female mice was investigated through intranasal instillation. After exposure for 30 days at the dose of 50 mg/kg body weight, no abnormal activity and mortality were observed with the normally…
Extended abstract of a paper presented at Microscopy and Microanalysis 2008 in Albuquerque, New Mexico, USA, August 3 – August 7, 2008
The surface of the poly(monochloro- para -xylylene) (parylene-C) films after O 2 plasma and successive Ar and NH 3 plasma treatment was investigated using a contact angle and an X-ray photoelectron spectroscopy (XPS) measurement. In this work, it was confirmed that the polymer hydrophilicity after the O 2 plasma treat…
Global thermally stimulated discharge current (TSDC) and partial thermally stimulated discharge current (PTSDC) spectra were recorded to investigate the molecular motions at glass transition temperature (Tg) level in both sided vacuum aluminized 30 μm thick poly (methyl methacrylate) samples. The calculated values of…
This paper presents a reliable method for the growth of single-walled carbon nanotubes (SWNTs) at room temperature by using localized heating. A surface micromachining technique is used to create suspended microstructures for good thermal isolation. Pt resistors are integrated as the heating source, and the local grow…
Silane-based dusty plasmas are widely used in plasma-enhanced chemical vapor deposition processes to synthesize silicon nanoparticles and/or nanostructured thin films. Under certain conditions, it is possible to access to the inner structure of the thin film by scanning electron microscopy, using the ldquoholerdquo du…
The dependence of the fragility on the Grüneisen lattice parameter, which is a measure of the anharmonicity of lattice vibrations, is established for lead silicate and sodium borate glasses. An expression relating the fragility of glasses to the parameters of the Williams-Landell-Ferry equation is obtained. The calcul…
Four flaky graphite cast irons of different graphite structures with a pearlitic matrix were prepared to clarify the graphite structure's influence on the dry sliding wear property. Two melts of cast iron with different carbon contents were solidified at two different cooling rates. The four resultant samples had type…
ZnO and Al-doped ZnO (AZO) were etched in Cl 2 /CH 4 /H 2 /Ar (Cl 2 -based) and BCl 3 /CH 4 /H 2 /Ar (BCl 3 -based), inductively coupled plasmas (ICPs) and their etching characteristics were compared by varying the Cl 2 /(Cl 2 +CH 4 ) and BCl 3 /(BCl 3 +CH 4 ) flow ratios, top electrode power and dc self-bias voltage…
Extended abstract of a paper presented at Microscopy and Microanalysis 2008 in Albuquerque, New Mexico, USA, August 3 – August 7, 2008
The crystallization of strontium borate glasses containing 16.7–43.0 mol % SrO is investigated. New crystalline compounds of the hypothetical compositions 2SrO · 3B 2 O 3 (metastable) and SrO · 5B 2 O 3 (stable below 750°C), as well as the metastable diborate modification β-SrO · 2B 2 O 3 , are revealed, and their X-r…
Abstract Polymer nanocomposite films with unusual and anisotropic optical properties were obtained by the controlled in‐situ generation of noble metal nanoparticles (NPs). Poly(vinyl alcohol) (PVA) and poly(ethylene‐ co ‐vinylalcohol) (EVAl) nanocomposites containing gold and silver NPs were efficiently produced by a…
The perfection of YVO4 crystals, which are predicted to replace formerly used YAG garnets due to higher quantum efficiency and lower excitation level, was studied. The investigations of Czochralski grown undoped YVO 4 single crystals were performed mainly by means of X-ray topographic methods. Both synchrotron and con…
The role of applied mechanical stress on space charge breakdown in electron beam irradiated polymethyl methacrylate (PMMA) is investigated. Space charge is implanted into PMMA sheets by electron beam. Space charge is measured by laser induced pressure pulse technique to investigate injection, trapping and detrapping o…
The aim of this paper is to infer partial discharge (PD) detection limits in extruded cables as a function of the distance between PD source and detection point. The investigation is carried out for different types of detectors, from IEC 60270-compliant to ultra-wide bandwidth systems. For this purpose, a medium volta…
We report on the structure and morphology of thermoexfoliated graphite (TEG) powders and TEG–metal ( Co , Cu , Ni ) powders. Electrodynamic parameters of the compacted TEG and TEG–metal specimens have been studied along the compacting axis (c axis) within the range of electromagnetic radiation frequencies between 25.5…
The addition of Re, Fe and Cr into Ti–50 mol.-%Ni has been carried out to improve the oxidation and mechanical properties. The mono phase consisting of TiNi with the B2 type structure was identified in micro-alloyed materials proposed on the basis of the d-electrons concept. Experimentally, TiNi alloys were melted and…
A three dimensional nano-scale finite element model (FEM), called the chemical bond element model, is proposed for the simulation of mechanical properties of single-walled carbon nanotubes (SWCNTs) based upon molecular mechanics method. Chemical bonds between carbon atoms are modeled by chemical bond elements. The con…