Materials Literature
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Abstract We have manufactured cathodoluminescent lamps equipped with field emitters composed of carbon nanotubes and nanosized graphite crystallites. The nanocarbon film material was obtained by chemical vapour deposition onto Si and Ni substrates and was used as grown in the vacuum light‐emitting devices. Various lig…
A critical issue in fabricating arrays of holes is to achieve high-aspect-ratio structures. Formation of ordered arrays of nanoholes in silicon nitride was investigated by the use of ultrathin hard etch mask formed by nickel pulse reversal plating to invert the tonality of a dry e-beam resist patterned by e-beam litho…
When ultrasonic waves are applied, the heat transfer at a heated surface in water increases markedly. The origin of this increase in heat transfer is thought to be due to the agitation effect from the microjets of cavitation and from acoustic streaming. The method in which four vibrators are used has the ability of fu…
Abstract An Fe-9Cr-2W-0.25V-0.07Ta-0.1C (9Cr-2WVTa) steel has a smaller prior-austenite grain size than this same composition without tantalum (9Cr-2WV) when the steels are given a similar heat treatment. Except for prior-austenite grain size, the microstructures of the steels are similar before irradiation, and they…
The dc conductivity of VN–PbO–TeO2 glasses with different mole percentages of VN, PbO and TeO2 has been measured in the temperature range 125–450 K. The conductivity of the glasses increases with increasing VN content for a fixed mole percentage of PbO. Neither Mott's variable-range hopping (VRH) model at low temperat…
The mechanisms responsible for phonon attenuation in glasses and in porous systems have been investigated. The acoustic attenuation has been measured by Brillouin light scattering using a Fabry-Pérot apparatus and a new ultraviolet spectrometer. In particular, melt-quenched vitreous silica (ρ = 2200 kg m−3), silica xe…
The crystal structure of getchellite, As 0.98 Sb 1.02 S 3.00 , from the type-locality (the Getchell mine, Humboldt County, Nevada), monoclinic, P2 1 /a, a = 11.949(3), b = 9.028(1), c = 10.130(2) Å, β = 116.15(1)°, V = 980.9(4) Å 3 , Z = 8, was solved by direct methods and refined with full-matrix leastsquares techniq…
Four kinds of carbon/carbon (C/C) composites, including the needled carbon fiber felt/the pyrolytic carbon (two different pyrolytic carbon microstructures), the chopped carbon fiber/the resin + pyrolytic carbon (PyrC), and the carbon cloth/PyrC, named as the composites 1#, 4#, 2#, and 3#, are prepared respectively. Ef…
Ultra-high temperature ceramics (UHTC) are of interest for hypersonic vehicle leading edge applications. Monolithic UHTCs are of concern because of their low fracture toughness and brittle behavior. UHTC composites (UHTCC) are being investigated as a possible approach to overcome these deficiencies. In this study a sm…
Abstract The effects of the content and size of the filler on the curing characteristics and mechanical properties of linoleum flour‐reinforced acrylonitrile‐butadiene rubber (NBR) composites are analyzed. The linoleum flour was obtained from wastes of linoleum production. The effects of this filler are compared with…
In this study, we investigated copper chemical vapor deposition (Cu CVD) on TiN substrates with respect to the effects of various plasma treatments. The Cu films deposited on the Ar-, H 2 -, and Ar+H 2 -plasma-treated TiN substrates all exhibit favorable properties over films deposited on the as-deposited TiN substrat…
This paper is devoted to a clear and simple group theory description of the morphology and microstructure (including the orientation relationships among lattice correspondence variants, habit plane variants and the self-accommodation diamond) of 2H martensite in shape memory alloys (SMAs). There are 24 elements in poi…
Abstract Specific volumes of high‐density and low‐density polyethylene liquids at several elevated temperatures and pressures were measured. The measured specific volumes were then used to estimate the thermal expansion coefficients \documentclass{article}\pagestyle{empty}\begin{document}$\left( {{\rm \alpha = }\frac{…
Remanence properties and magnetization reversal mechanism of Fe nanowire arrays with diameters 16 nm and 130 nm are studied. Isothermal remanent magnetization curves show that the contribution of irreversible magnetization decreases when the diameter changes from 16 nm to 130 nm. The remanence coercivities of these na…
Corrosion behaviour of iron and mild steel in organic acid solutions has attracted the attention of several investigators 1-3 . Corrosion studies on metals in organic acid solutions are scarce in comparison with similar studies in mineral acids 4-7 . Mild steel is used for fabrication of reaction vessels, storage tank…
The practical difficulties encountered in analyzing the kinetics of new reactions are considered from the viewpoint of the capabilities of state-of-the-art high-throughput systems. There are three problems. The first problem is that of model selection, i.e., choosing the correct reaction rate law. The second problem i…
Abstract The non‐isothermal crystallization kinetics of pure polyamide 1010 (PA1010) and PA1010/montmorillonite nanocomposite (PA1010/MMT) was investigated by differential scanning calorimetry (DSC) at various cooling rates. The Avrami analysis modified by Jeziorny and a new method developed by Mo can describe the non…
Mechanical tensile and impact toughness tests and critical pitting corrosion temperature (CPT) tests were performed on samples of Duplok 27, a P/M-HIP duplex stainless steel containing copper, after heat treatments simulating industrial heat treatments of large components. It was shown that copper alloying has positiv…
Sulfonated aluminum phthalocyanines interact with cytochrome c forming complexes in aqueous solutions. The binding of these dyes was probed using fluorescence techniques (steady-state spectroscopy and time-correlated single photon counting), which enable the calculation of the equilibrium binding constants. The fluore…
We prepared iron-impregnated silica films, which turned out to be very efficient catalysts for carbon nanotube synthesis, by a sol-gel process starting from the mixture of tetraethyl orthosilicate (TEOS), aqueous solution of iron nitrate (Fe(NO3)3⋅9H2O), and ethanol. The Fe/silicate-composite catalyst films consisted…