Binary aluminum base phase diagrams and diffusion under high pressure.
Al-Ag1
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Powder surface modification machine of high speed impact method NARA Hybridization System and application.
The high speed impact method for the surface modification of particles, called the NARA Hybridization System, is one of the most highlighted one among the methods for developing various particles. The key machine which joins many fine powder to the surface of a core particle through a dry and mechanical method can be…
Effects of SiO<sub>2</sub> Substitution on the Structure and Properties of Low-Melting Phosphate Glass
The effects of SiO2 substitution for P2O5 on the structure and properties of phosphate glass with the base composition 60P2O5⋅10PbO⋅20ZnO⋅10Li2O were investigated. Glass was formed when there was less than 25.0% SiO2 substitution for PO5/2. From measurements of Fourier-transform infrared spectroscopy and X-ray fluores…
An Intelligent Degradable Polymer Composite Which Closely Matches Bone
Polyhydroxybutyrate (PHB) and its copolymers with polyhydroxyvalerate (PHV) are a range of slowly degrading polyesters with potential for use in orthopaedic surgery. The polymer degradation profile is unpredictable and thus a composite of PHB/7 % PHV and a completely soluble phosphate based glass reinforcement was com…
Development of XLPE insulated DC cable
Abstract This paper describes the development of dc XLPE cable. Through a series of material investigations, an XLPE compound containing highly purified special filler was developed. To check the dc insulation performance of the cable insulated with this new material, a prototype cable with 9 mm insulation thickness w…
Electron Donating and Acid-Base Properties of Cerium Oxide and Its Mixed Oxides with Alumina
The electron donating properties of ceria activated at 300, 500 and 800 °C and its mixed oxides with alumina are reported from the studies on adsorption of electron acceptors of various electron affinity. The surface acidity/basicity of the oxides have been determined by titration method and H 0,max values are reporte…
COMPUTATION OF 3D EDDY CURRENT FIELDS AND LOSSES DUE TO LEADS IN A LARGE POWER TRANSFORMER
Boundary element method(BEM) is applied to computation of 3D eddy current fields due to heavy current leads in a 360MVA/500kV power transformer. To improve numerical accuracy, triangle polar coodinate mapping and addition‐substraction technique are chosen to evaluate singular integrals. The effects of different shield…
ADDITIONAL LOSSES IN OVERLAPPING AREA OF TRANSFORMER CORE
The influence of overlap length and overlapping design on core loss and magnetizing current of single‐phase two‐leg transformer core has been investigated The investigation was performed experimentally, on scaled models, and numerically, using 2D finite element method Two types of overlapping, mitred and staggered one…
An Evaluation of Deconvolution Techniques in X-ray Profile Broadening Analysis and the Application of the Maximum Entropy Method to Alumina Data
Abstract This paper reviews several procedures for the removal of instrumental contributions from measured x-ray diffraction profiles, including: direct convolution, unconstrained and constrained deconvolution, an iterative technique, and a maximum entropy method (MEM) which we have adapted to x-ray diffraction profil…
Synchrotron X-Ray Studies of Potentiostatically Formed Phosphate Layers on Steel
SUMMARYThe phosphating of steel in an aqueous zinc-phosphating bath has been studied. Phase formation was controlled potentiostatically and phase identification was performed by X-ray diffraction, using synchrotron radiation, which enabled the time development of phosphate coatings to be studied. Two phases are formed…
Selective clathration in a cage-type host lattice of cyclophosphazene
Tris(naphthalene-2,3-dioxy)cyclotriphosphazene (TNDOCTP) forms a channel-type clathrate with benzene and also a cage-type one with p-xylene. X-Ray analysis of the p-xylene clathrate showed that the cavity size and form were adequate to accommodate para-disubstituted benzenes into the cage lattice. The extracts obtaine…
Surface Oxidation and Its Effect on the Observed Elastic Modulus of SiC Whisker/A1203 Composites
This article presents an analysis of the 27 wt.% SiC whisker/A1 2 0 3 c01 posites exposed to air for periods up to 180 hours at 1100 C to 1450 C. Experimental results indicate that SiC whisker reacts with oxygen and alumina to produce a mullite-rich surface layer on tested composite specimens. The surface oxidation re…
MICROSTRUCTURAL OBSERVATION OF M50 AND T1 HIGH SPEED STEELS DURING SLIDING WEAR
The sliding wear behaviour of M50 and Tl high speed steels was investigated using a pin on disc machine. The wear mechanism is one of severe oxidation wear and wear damage was more severe in M50 steel; this was attributed to its lower primary carbides content. The following factors improve the wear resistance of the s…
Lithographic performance of isomeric hydroxystyrene polymers
Abstract The synthesis and lithographic characterization of the three positional isomers of polyhydroxystyrene is described. Large differences in dissolution rates are found as a function of the position of the hydroxy group, which are explained in terms of intra‐ vs. intermolecular hydrogen bonding and steric shieldi…
EXAFS Study of the Aging of LaNi5 and LaNi4.5Mn0.5 Compounds During Tritium Storage*
Article EXAFS Study of the Aging of LaNi5 and LaNi4.5Mn0.5 Compounds During Tritium Storage* was published on January 1, 1994 in the journal Zeitschrift für Physikalische Chemie (volume 183, issue 1-2).
Impact Strength of .BETA.-Ti Alloy.
Compressive strength of β-Titanium alloy (Ti-15V-3Cr-3Sn-3Al) has been investigated in the wide temperature range of 77 to 673K and at strain rates from 10-4 to 2×103S-1. The stress-strain relations are influenced by the change of temperature arizing from the heat conversion of plastic work, while almost independent o…
Studies on the high-temperature superconductor (HTS)/metal/polymer dielectric interconnect structure for packaging applications
A HTS/metal/low dielectric constant polymer dielectric hybrid interconnect structure was fabricated using high density interconnect (HDI) copper/polyimide processing techniques. Nondegraded superconducting properties, J/sub c/ of over 1 MAcm/sup -2/ and T/sub c/ of 88 K, were obtained using optimum processing conditio…
Formations of an [8π+ 4π] cycloadduct via an electron-transfer mechanism and a meta-cycloadduct by irradiations of tropone and 9,10-dicyanoanthracene
In the photoreaction with 9, 10-dicyanoanthracene, tropone 1 behaved as an electron donor to give an [8π+ 4π] adduct 10via an electron-transfer mechanism in a mixed solution of MeCN–CH2Cl2(1 : 1); other products characterized were an unprecedented meta-cycloadduct 7, a trans[2π+ 4π]6, and a [4π+ 4π]–[2π+ 4π] adducts 8.
The production of poly-.BETA.-hydroxybutyrate by hydrogen bacteria, alcaligenes eutrophus H16 from alginic acid.
In the present study we used alginic acid and degradation products of alginic acid as carbon source for the production of biodegradable plastic, poly-β-hydroxybutyrate (PHB), by Alcaligenes eutrophus H16, and the possibility of PHB production from seaweed will be discussed
X-Ray absorption spectroscopic study of the binary semiconducting glass PbV2O6
The 1:1 PbO:V2O5 semiconducting glass prepared by quenching an equimolar mixture of PbO and V2O5 melt (650 °C) at liquid-nitrogen temperature has been investigated by XAS (X-ray absorption spectroscopy) at 25 and –180 °C. The spherical wave approximation was used, applying parameters extracted from the crystallographi…