Materials Literature
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High-temperature naphthenic acid corrosion (HNAC) behaviors of type 304 and type 316L stainless steel have been investigated in the laboratory with the experimental devices, that were designed and built by ourselves and had applied a patent, to evaluate the resistance of the base metal and their welded joints to the H…
Fine-particle composites consisting of high-permeability particles with a large size difference exhibit enhanced initial permeability. From an analysis of the initial permeability of a composite that includes Fe (1 micron) particles as a main component, we found that the microscopic demagnetizing field imposed on the…
The phase transformation and magnetic entropy change (ΔS M ) in the Ni 55 Mn 20 Ga 25 Heusler alloy has been studied. The temperature dependence of magnetization study shows the direct transition from ferromagnetic martensitic phase to paramagnetic austenitic phase occurred at 353 K. By compositional tuning the first…
We examine the form of the islands formed by CaO on BaO and SrO substrates using both periodic density functional theory and atomistic simulation techniques. (100) edges dominate the island morphology and we examine how the CaO adjusts to the substrate in small and medium sized islands and at much larger coverages. Th…
In order to improve the electrical properties of stabilized Bi2O3 such as oxide-ion conductivity, conductivity degradation by annealing and reduction resistivity, the solid solution systems, (Bi0.8-xLnxEr0.2)2O3 (0.0 ≦ x ≦ 0.20) (Ln = La, Pr, Nd) were investigated. Though the electrical conductivity of the three solid…
This note reports the first finding of Haloroundia speciosa (Hustedt) Diaz et Maidana (Bacillariophyceae) in a sample collected from the Salar de Aguas Calientes, Loa Province, northern Chile (23°30'S; 67°33'W). This species is restricted to the Andes Mountains. Comments about its morphological features and geographic…
The molecular structure of a dinuclear nickel(II) complex was optimized by several computational methods, including ab initio, DFT, and semi-empirical methods. The computed structures were compared with crystallographically obtained structures. All the DFT methods reproduced the crystal structures well, and the B3LYP…
The almost archaeological silk fibers are heavily degraded due to the long-term preservation at underground. The authors have been continuing the scientific research on the degraded state of silk fibers using infrared microspectroscopy. Though we have previously reported results about the characteristics of deformed i…
(Mg,Ni)O solid solutions were synthesized by calcination of MgO and NiO mixtures (MgO:NiO = 65:35 in mol) at 1500°C for 2 h in air. When the samples were firstly reduced at 1000°C in a gas mixture of 4 vol% hydrogen and nitrogen, a volume expansion was observed. The results of powder X-ray diffraction (XRD) and scanni…
Composite nanodevices (CNDs) are a well-studied class of multifunctional nanomaterials with several potential medical uses, including cancer imaging and therapy. Gold/ dendrimer CNDs are organic/inorganic hybrid materials consisting of physical networks of dendrimer(s) and inorganic materials. This design permits prop…
Epoxy-layered silicate composites have been prepared by dispersing an organically modified montmorillonite (Nanofil 919) in an epoxy resin and curing in the presence of an aromatic hardener. Dispersion of the layered silicate within the epoxy matrix was verified using X-ray diffraction and transmission electron micros…
Henry constants for the adsorption of o- and p-phenylenediamines on the surface of graphitized thermal carbon black within the temperature range 433–479 K were calculated by the molecular statistical method. The parameters of the atom-atom potential function of intermolecular interaction between the nitrogen atom in a…
Through this work we explored the effect of melt compounding a commercial grade of HDPE with organoclays of different precedence using EMAA as compatibilizing agent on the thermal behavior, barrier properties and biaxial impact response of composites. Morphology was examined by XRD and TEM. Crystalline structure was e…
Raman spectra of diamond-like carbon (DLC) films prepared using bipolar-type plasma based ion implantation (PBII) are measured and the peak separation is carried out by curve fitting of the spectra using Gaussian, Mixed, Lorenzian and Breit-Wigner-Fano (BWF) functions. The effects of the fitting functions on the inten…
The crown form of nona-octanoyloxy tribenzocyclononatriene (C8) with C(3) symmetry was prepared and separated into its enantiomers (C8A and C8B) by HPLC. Like the racemate, the neat enantiomers are also mesogenic, exhibiting two mesophases, M and Col(h). Differential scanning calorimetry, X-ray diffraction, carbon-13…
The structural, energy, electrokinetic, and magnetic characteristics of the intermetallic semiconductor ZrNiSn heavily doped (to 9.5 × 10 19 –3.8 × 10 21 cm −3 ) with Dy acceptor impurity have been investigated in the temperature range T = 80–380 K. A relationship has been established between the impurity concentratio…
The most extensively studied Heusler alloys are those based on the Ni-Mn-Ga system. However, to overcome the high cost of Gallium and the usually low martensitic transformation temperature, the search for Ga-free alloys has been recently attempted, particularly, by introducing In, Sn or Sb. In this work, Mn50Ni40In10,…
We have fabricated Pd nanoparticles (NPs) with clean surface and revealed the adsorption reaction of dimethyl sulfide (DMS) on Pd NPs/Ni(111) surface depending on the amount of deposited Pd NPs using in-situ X-ray Photoelectron Spectroscopy (XPS). As a result of XPS, DMS does not decompose on Ni(111) and bulk Pd surfa…
Space mirrors in Low Earth Orbit (LEO) encounter a degradation problem caused by the impact of atomic oxygen (ATOX) in the space environment. This paper presents an experiment of the atomic oxygen impact degradation and UV synergic effects on ground simulation. The experiment was carried out in a dedicated ATOX simula…
Este trabajo recoge una visión general de las propiedades, ventajas e inconvenientes de los principales materiales usados en los electrodos de los condensadores electroquímicos (también denominados supercondensadores). La elección de estos materiales tiene una enorme influencia en las características finales del dispo…