Materials Literature
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Measurement of the X-ray diffraction patterns of 304L stainless steel after subjecting it to an electrochemically induced surface annealing process in concentrated nitrite solutions shows that the austenite lattice contracts during processing relative to the untreated alloy. The surface annealing procedure, which invo…
We have studied the influence of multiple carbon treatments on the properties of silica porous glasses. Each step of each carbon treatment started with filling the voids of porous glass with carbon. During the following anneal carbon interacted with the walls of the voids. It was shown that low dimensional silicon clu…
We present the first computer simulation study of the Freedericksz transition in a nematic phase using a Gay-Berne model mesogen, in which the constituent molecules can both rotate and translate freely. The behaviour and structure of the nematic obtained from the simulation for the Freedericksz transition are compared…
—As the applications of composite structures have increased, various techniques to join composite parts to the structures have been developed in order to meet the required adhesion strength. In this work, surface modification of carbon/epoxy composites was investigated using ultraviolet (UV) surface treatment to incre…
Structural and thermal characterizations and dc resistivity measurements were performed for polyvinyl acetate (PVAc)/polyvinylidene fluoride (PVDF) blends. The ferro- to para- electric transition temperature ( T FP ) and the melting temperature of PVDF were detected by DTA. X-ray diffraction and infrared analysis evid…
The thermal stability of gold deposited on Nb 2 O 5 /W, Nb 2 O 5 /Nb and NbO/Nb substrates was investigated by angle-resolved X-ray photoelectron spectroscopy. Gold in amounts 0.1-1.2 monolayer was vapour-deposited on an oxide substrate under ultrahigh vacuum. A shift of the Au (4f) core level towards higher binding e…
Fiber bundles in sliver form more closely represent the fiber bundles commonly used in commercial testing.Therefore, this experiment focused on studying drafting force using untwisted fiber bundles (sliver) rather than twisted fiberbundles (roving) as had been previously studied. Four cottons of similar micronaire but…
In ferromagnetic martensite of some Ni-Mn-Ga alloys, magnetic field causes movement of twin boundaries, which results in large magnetic-field-induced strain. Present work is a review of some original experimental results concerning in-situ studies of the correspondence of magnetic domains with twin domains and their r…
Thema des Buches ist eines der umfangreichsten Industrieprojekte in der Geschichte der Schweiz: Die Entwicklung eines eigenen Reaktortyps. Während eines Jahrzehnts bemühten sich zahlreiche Industriefirmen, Bundesstellen, wissenschaftliche Institute und Elektrizitätsgesellschaften, den Anschluss der Schweiz ans Atomzei…
The use of advanced lightweight materials to improve combat survivability has been of crucial interest to the U.S. Army for a number of years. Specifically, hybrid organic/inorganic polymer matrix nanocomposites show promise in providing many of the physical properties required (i.e., lightweight structure, rugged abr…
The synthesis and surfactant activities of two new cationic gemini surfactants containingtriazole compound as spacer were described. Their critical micelle concentrations (CMC), whichare 1.8 × l0-4 mol/L and 3.9× 10-4 mol/L respectively, are much lower than that of conventionalsurfactant cetyltrimethyl ammonium chlori…
Vanadate glass formation in two heavy metal oxide systems is reported and in the process physical property data were obtained. These data were compared with earlier results found from alkali and alkaline earth vanadates. ( 1 ) 4 ) Glass formation limits extended over 0.00≤R≤1.50 for the alkali and alkaline earth vanad…
Influence of silicon content of hot working tool steel (4mass%Cr-Mo-V-Ni) on machinability at milling process has been investigated. The effect of silicon was compared with that of lubricant, concerning tool life, cutting forces and temperature, chip detachment from a tool, tool damages, surface oxidization, microstru…
In this paper the σ e relation of 45 steel under different initial temperatures (25～300 ℃) and strain rates(10-4～103 s-1) has been studied with the split Hopkinson press bar (SHPB) and the MTS (Materials test system), its constitutive relation is determined then.The metallography observation show that the re…
Cubic boron nitride (c-BN) was synthesized under high temperature and high pressure from the graphite-like hexagonal boron nitride (h-BN). The lattice parameters of c-BN have been measured in the temperature range from room temperature to 1000 ℃using high power high temperature XRD under room pressure. Therefore its i…
Sulfur hexafluoride exhibits many excellent properties that make it suitable for insulation of equipment used in the transmission and distribution power networks. Sulfur hexafluoride is an efficient infrared absorber, and owing to its chemical inertness it has a very long life(approx. 3200 years) in the Earth抯 atmosph…
A study has been made of proton migration in an anodic aluminum oxide film during cathodic polarization in 1 M hydrochloric acid solution at 30°C. The charge transported by proton migration in the oxide film during the polarization was quantitatively determined using time-of-flight-elastic recoil detection analysis. A…
Gold nanowell electrode arrays, with a well-depth of approximately 50 nm, have been prepared. The electrodes were prepared by the electrodeposition of gold throughout the pores of a porous alumina membrane. Both electrochemical gold stripping and ion bombardment were employed to remove gold to create the wells, with t…
Abstract The crystallization mechanism and the controlling factors in the crystallization of amino acid polymorphs were investigated. It was demonstrated that the effect of supersaturation (Ostwald's step rule) was not observed for systems of either L‐Glutamic acid (α, β) or L‐Histidine (A, B). The intensive effect of…
This papaer describes the magnetic properties of wound-core type three-phasetransformer. In the analysis, magnetization characteristics are approximated by a Fourier-series, and it is assumed that the eddy current factor is proportional to the time-varying magnetic flux. Moreover harmonic balance method where the zero…