Materials Literature
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The formation process of silicon-nanocrystals (Si-NCs) in the amorphous silicon/silicon dioxide (a-Si/SiO2) multilayer structure during thermal annealing is theoretically studied with a modified model based on the Gibbs free energy variation. In this model, the concept of average effective interfacial free energy vari…
Magnetic properties, Curie temperatures, and transport properties of semi-Heusler alloys Cu x Ni 1− x MnSb are calculated as a function of the alloy composition from first-principles. The transition from the ferromagnetic state (NiMnSb) to the antiferromagnetic state (CuMnSb) gives rise to an abrupt change in the conc…
In light of the success of making multicomponent sol–gel glasses, in this study the synthesis of new hybrid nanosilicas with controlled hydrophilic/hydrophobic properties was carried out by incorporating organic based species with appropriate functional groups to inorganic based alkoxides by co-condensation reaction.…
Metallic thin films and metallic nanoparticles give rise to peculiar optical effects in frequency regions where an external electromagnetic field can couple to charge oscillations resonantly. Plasmons localized at interfaces and closed surfaces give rise to huge local field enhancements which can be used for a great v…
Nannocrystalline and nanoporus thin films of ZnO were synthesized on glass substrates by using wet chemical drop casting method. X‐ray diffraction measurements on these samples confirmed the formation of ZnO nanocrystallites in hexagonal wurtzite phase with mean size of ∼20 nm. Photo sensitization of these nanostructu…
We have investigated growth of metal-free carbon nanotubes (CNTs) on glass substrates with a microwave plasma enhanced chemical vapor deposition (MPECVD) method. An amorphous carbon (a-C) film was used as a catalyst layer to grow metal-free CNTs. The a-C films were deposited with a RF magnetron sputtering method using…
A thermoelectric energy recovery module (TERM) is proposed. The TERM seeks to generate electrical energy from waste heat of power amplifier transistors. The TERM consists of a thermoelectric generator (TEG), a heat spreader, and a heat sink. A fully-coupled thermoelectric (TE) model of the TERM is developed to predict…
An analysis of experimental data on the electrical resistivity, Hall coefficient and electronic specific heat coefficient of a quantum critical (Cr 86 Ru 14 ) 1− x V x alloy system, is reported. The results give information on the role of spin-density-wave effects on the zero temperature relationships between these ph…
There is an issue of the fish adhering to the metal grids of grill strongly after grilling fish. Recently, the temperature in a grill equipment is over 500 °C, Fluorine resin coating which has low adhesion property can not endurant at 500 °C. In order to overcome this issue, we proposed a new grill not to adhere a fis…
Polymer nanocomposites based on poly (butylene succinate-co-butylene adipate) (PBSA) with various concentrations of organically modified montmorillonite were fabricated by the solvent casting technique. The morphology of the prepared materials was investigated by X-ray diffraction (XRD) and their thermal behaviour was…
α and γ Al2O3 doped sintered ZnO (n-type) and sintered CuAlO2 (p-type) pellets were prepared by conventional solid state synthesis starting from the oxides. 2% γ Al2O3 doped ZnO was the best n-type sample showing a thermoelectric figure of merit ZT = 0.17 at 800℃. In the case of p-type CuAlO2 sample, ZT = 0.035 at 800…
The two Loviisa VVER-440 type reactors were commissioned in 1977 and 1980. The original designed life time of the reactors was 30 years. In 2003 Fortum, the owner and the operator of the Loviisa plant, launched an extensive safety study to prove the authorities that there was not any major safety issue why operating l…
We report herein the utilization of a vacuum reduction distillation system (VRDS) coupled with mass spectrometry (MS) to characterize chemical transformations in thermal analysis. The system initially designed to monitor metal purification by distillation is applied for the first time to the catalytic reaction of in s…
In this paper we formulated and characterized biomedical devices for bone tissue regeneration. These systems were realized homogenously dispersing lamellar Hydrotalcite loaded with Diclofenac Sodium in a polymeric matrix of PCL (Poly‐caprolactone). These biomedical devices were obtained through the electrospinning tec…
The nitriding behavior of cold rolled Fe93Ni4Ti3 specimens was compared with that of hot rolled specimens of the same materials. Radio frequency (rf) nitriding was performed for 10 minutes in a 10-2 mbar nitrogen atmosphere. The continuous plasma power was varied from 300-550 W in steps 50 W or less. Results of optica…
In the present study, the effects of electron beam irradiation of polyamide 12 (PA12) with fiberglass reinforcement on the thermal and wear properties were investigated. Electron beam irradiation of PA 12 was carried out over a range of irradiation doses (100–600 kGy) in air. The gel formation in the presence of a cur…
The enthalpies of reactions of Sm1 + x Ba2 − x Cu3O y substitution solid solutions (x = 0, 0.1, 0.2, 0.3, 0.7, and 0.8) with 1.07 N HCl were measured at 298.15 K in a hermetic isothermic-shell swinging calorimeter. The results and the literature data were used to calculate the standard enthalpies of their formation fr…
The consideration of the variational problem for minimization of the bending energy of membrane surfaces under some natural geometric constraints leads to the so called general shape equation. The available analytical solutions of this equation including a new one are reviewed in some detail.
The National Superconducting Cyclotron Laboratory (NSCL) is a NSF‐supported facility, with additional support from Michigan State University (MSU) for conducting research in nuclear and accelerator science. The facility consists of two superconducting cyclotrons and over fifty individual cryostats, each containing sev…
Failures of structural and mechanical components have long been attributed to environmentally assisted cracking (EAC). The umbrella of EAC encompasses several phenomena, including stress corrosion cracking (SCC), corrosion fatigue (CF), hydrogen embrittlement (HE) and liquid metal embrittlement (LME). The latter, LME,…