Materials Literature
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The paper describes novel HTS toroidal transformer with helical windings, operating at 50 Hz. The turns of outer winding are parallel to turns of inner one. This arrangement of windings results in the same length and shape of each turn. The latter ensures homogeneous distribution of flux density. The magnetic core, in…
A new near-net-shape technology, namely, self-reactive spray forming, to prepare ceramic preforms with low cost was proposed by combining the self-propagating high-temperature synthesis (SHS) with the metal spray forming. The feasibility of the technology was illustrated. And TiC-TiB2 -based structural ceramic was pre…
In order to study local structure around the Pd atoms in Pd 42.5 Ni 7.5 Cu 30 P 20 excellent metallic glass-former, an anomalous X-ray scattering (AXS) experiment was performed at energies close to the Pd K absorption edge. The differential structure factor, Δ Pd S(Q) , was obtained with a good statistical quality, wh…
In the present study, the phase transformation behaviour of 51CrV4 steel was investigated both in an actual flange forming process and under idealized isothermal bainitic transformation conditions. The results demonstrated that superimposed external stresses have only a minor effect on the kinetics of the phase transf…
Microstructures and deformation behaviour of Ti-45Ni-5Cu and Ti-46Ni-5Cu alloy ribbons prepared by melt spinning were investigated by transmission electron microscopy, thermal cycling tests under constant load and tensile tests. Spherical Ti2Ni particles coherent with the B2 parent phase were observed in the alloy rib…
A near-field study of the electro-optical phenomena and aging characteristics of nanostructured and bulk ZnS:Mn alternating-current thin-film electro-optical devices is presented. ZnS:Mn nanocrystals embedded in the glass matrices as well as ZnS:Mn thin-film phosphors contain four different concentrations of Mn (from…
Ferromagnetic ( Ni , Co , Fe ) nanowires were electrodeposited using AAO template. XRD analysis indicated that the ferromagnetic wires had preferred orientation. For longer deposition time, the nanowires with textured structure changed to single crystal. The investigation on the growth mechanism showed that in the ini…
This paper focuses on the packaging process and assembly and interlayer dielectrics (ILD) structural stability including mechanical simulation with polymer-encapsulation and redistribution process for 150-pitch Pb-free flip chip packaging of low-/Cu interconnects. Chemical vapor deposition (CVD) type low- test vehicle…
Using first-principles density functional calculations, the structural, magnetic, and spin-dependent transport properties of a set of intermetallic compounds ${\mathrm{CeNi}}_{4}M$ $(M=\mathrm{Sc}\text{\ensuremath{-}}\mathrm{Co})$ are investigated. All the compounds are considered to be in the orthorhombic phase, in w…
Isothermal and cyclic oxidation behaviours of pure and yttrium-implanted nickel were studied at 1000°C in air. Scanning electronic microscopy (SEM) and transmission electronic microscopy (TEM) were used to examine the micro-morphology and structure of oxide scales formed on the nickel substrate. It was found that Y-im…
We present a study on the angular dependence of the critical current density (Jc) of SiC-doped MgB2 tapes fabricated by powder-in tube (PIT) with stainless steel (SS) as sheath material. The microstructure and texturing of the tapes are analysed to understand the effects of the rolling degree on the superconducting pr…
For the first time isothermal thermogravimetric (TG) measurements of oxygen diffusion in to melt processed YBa 2 Cu 3 O δ /Y 2 BaCuO 5 (Y123/Y211 or YBCO) bulk samples were conducted in the temperature range 350 – 800°C. It is shown that the real time to a full sample oxygenation is much shorter than the calculated on…
In order to improve nano-scale phase change memory performance, a super-clean interface should be obtained after chemical mechanical polishing (CMP) of Ge 2 Sb 2 Te 5 phase change films. We use reactive ion etching (RIE) as the cleaning method. The cleaning effect is analysed by scanning electron microscopy and an ene…
Fouling from cooling tower water is a serious problem in both power and refrigeration industries. The effect of fouling on enhanced tubes could be worse than that on smooth tubes because fouling may degrade the superior heat transfer performance by filling the gaps between the roughness elements with foulant. Condense…
Fe2O3-SiO2 nanocomposites were prepared by a sol-gel method using various evaporation surface to volume (S/V) ratios ranging from 0.03 to 0.2. The Fe2O3-SiO2 sols were gelated at various temperatures ranging from 50 degrees C to 70 degrees C, and subsequently they were calcined in air at 400 degrees C for 4 hours. The…
A simplified treatment of the traditional theory of solvatochromism, attributed to Bayliss and McRae, is presented and used to describe the four main types of dipolar and dispersive physical interactions between solute and solvent. The theory is extended so that it may also be used to describe barochromism (pressure-i…
We investigate the fragmentation behaviour of decamethylcyclopentasiloxane (DMCPS) plasma using a quadrupole mass spectrometry, which is used as the precursor to deposit SiCOH film in an electron cyclotron resonance (ECR) plasma system. The structure of DMCPS molecules comprises a fivefold Si-O ring and ten -CH 3 grou…
Composites of silica nanospheres coated with crosslinked epoxy–amine were synthesised and examined by 29 Si-magic-angle-spinning nuclear magnetic resonance spectroscopy, thermogravimetric analysis, Fourier transform infrared spectroscopy and scanning electron microscopy. The most representative fact is that epoxy-modi…
Synchrotron photoelectron spectroscopy and X-ray absorption spectroscopy studies of cationic self-assembled monolayers (SAMs) of quaternary ammonium (QA) sulfur derivates prepared on gold substrates were performed to investigate the adsorption mechanism of l -tartaric acid on a gemini-structured didodecyl dithiol (HS-…
The crystallinity and surface morphology of zinc octaethylporphyrin, Zn(OEP), thin films (20 nm thick) deposited on an indium-tin-oxide substrate have been investigated using x-ray diffraction (XRD) and scanning electron microscopy (SEM). XRD and SEM results show that the Zn(OEP) film formed at room temperature (RT) w…