Materials Literature
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A new approach for the measurement of noise resistance based on the transient behavior of pitting corrosion is presented. Potential noise and current transients have been recognized as a characteristic behavior of pitting corrosion. This new approach uses the transient information present during corrosion as a way to…
The title compound doped with a small amount of deuterium shows infrared bands due to the N−D and O−D stretching vibrations. When one of the N−D bands is irradiated with an infrared laser, holes and anti-holes are produced. The pattern of these holes/anti-holes depends on the irradiation time. A ten-minute irradiation…
We report the measurements of pulse polarizations of (Pb, La)(Zr, Ti)O3 ferroelectric capacitors as a function of pulse width. Pulse polarizations were measured from the switching current responses in the pulse width range from 1 μs to 1 s. The relation between pulse polarizations(switched(P∗) and non-switched polariz…
This article presents a state-of-the art review to provide a detailed and coordinated account of the development of textures in titanium and its alloys during thermomechanical processing. In general, the evolution of textures depends on several factors such as deformation temperature and mode of deformation, initial t…
The aim of this study is the analysis of the dynamic crack propagation criteria in materials under impact loading. We want to define which mechanical quantities monitor the propagation, then use these parameters in numerical simulations and finally compare the results with dynamic propagation experiments. First, we pr…
Polypyrrole coatings were successfully electrodeposited on low-carbon steel substrates from aqueous oxalate solutions. The surface composition and topography of the polypyrrole coatings formed under different conditions were investigated by X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The…
Abstract Seit mehr als 50 Jahren werden Leuchtstoffe in Kathodenstrahlröhren zur Erzeugung von sichtbarem Licht eingesetzt. In den letzten Jahrzehnten sind die verwendeten Materialien ständig verbessert worden, um die gestiegenen Ansprüche an Auflösung, Helligkeit und Kontrast von Monitoren und Fernsehern zu erfüllen.…
The influence of thermo-exfoliated graphite (TEG) on the catalytic activity of nickel in the CO oxidation process has been investigated. It was shown that nickel supported on the thermo-exfoliated graphite surface was more active catalytically than the bulk metal. Alternate oxidation–reduction on the Ni–NiO phase boun…
Synthesis and characterization of Nd2Fe14−xSixBHy compounds are presented for x=1–2 and y=0–4. The samples have been studied with emphasis given to the structural aspects and the magnetic properties. Our present investigation has been performed both at 2 and 300 K by means of high-resolution powder neutron diffraction…
Several copper complexes used successfully as the catalysts for atom transfer radical polymerization (ATRP) were studied by cyclic voltammetry in acetonitrile. These complexes include CuBr or CuCl complexed by 2,2′-bipyridine (bpy), 4,4′-di(5-nonyl)-2,2′-bipyridine (dNbpy), 4,4′-di(n-nonyl)-2,2′-bipyridine (dnNbpy), N…
Crystals of different compositions, namely, [Ni( Ida )( Im ) 3 ] ⋅ H 2 O ( I ), [Ni( Im ) 6 ][Ni( Mida ) 2 ] ⋅ 6H 2 O ( II ), and [Ni( Im ) 2 (H 2 O) 4 ][Ni( Bida ) 2 ] ( III ), have been precipitated from aqueous solutions of the Ni 2+ - Lig 2− - Im systems, where Lig 2− is Ida , Mida , and Bida , respectively. The c…
Tetragonal-to-monoclinic martensite transformation due to water adsorption was found on the surface of both dispersed and ceramic oxide-stabilized zirconia. The transformation is due to local stretching strains arising in the lattice when the charge state of a stabilizer changes because of water molecules that are che…
Adiabatic shear bands self-organize themselves: this phenomenon was investigated in three different alloys ( stainless steel 304L, Ti, and Ti-6%Al-%V) through the radial collapse of a thick-walled cylinder under high-strain-rate deformation (∼10 4 s -1 ). This method was used to examine the shear-band initiation, prop…
Previous work done to measure spall response of U-Nb(6%) alloy showed a somewhat surprising result. In all experiments done previously no evidence for an elastic wave was observed; that is, no two wave structure was detected. In this paper we report on the results of new experiments done to look at the effect in more…
Six soil samples from the Bt2 horizon of red- and yellow-colored soils collected in Southern Japan and Yunnan, China, were used in this study. Detailed mineralogical studies by differential X-ray diffraction analysis showed the presence of hematite in association with goethite in the red-colored soils, whereas no hema…
Reflection and transmission of light in medium/cholesteric/substrate and glass (1)/cholesteric/glass (2) systems are discussed. These systems can be viewed as a cholesteric-filled Fabry-Perot resonator. A modified layer-addition method is used. Rigorous explicit expressions for the elements of the Jones matrices for t…
The surface morphology of polystyrene (PS), poly(ethylene oxide) (PEO), (PS) and polystyrene/poly(methyl methacrylate) blend (PS/PMMA) before and after ultraviolet (UV) irradiation was studied by means of atomic force microscopy. It was shown that the UV-induced changes were more noticeable on PS and PS/PMMA blend tha…
The metal-organic chemical vapor deposition (MOCVD) of ferroelectric thin films is being widely investigated for the manufacture of devices requiring a high density of volatile or non-volatile memory which goes beyond the limits of current mass production techniques. One of the more important challenges in the MOCVD o…
When multiphase alloys are rapidly heated, it is possible to cause melting of the interface between phases. This is called constitutional liquation if, during melting, the bulk composition is in a nonliquid region of the phase diagram but the tie-line between the liquating phases passes through a liquid region. The li…
Based on high resolution neutron powder diffraction (NPD) data, Llobet et al. [Phys. Rev. B 60, R9889 (1999)] have reported a structural transition of ${\mathrm{Pr}}_{1/2}{\mathrm{Sr}}_{1/2}{\mathrm{MnO}}_{3}$ from $I4/mcm$ ${(a}_{p}\sqrt{2}\ifmmode\times\else\texttimes\fi{}{a}_{p}\sqrt{2}\ifmmode\times\else\texttimes…